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gimp/plug-ins/common/sphere-designer.c

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/*
* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/*
* SphereDesigner v0.4 - creates textured spheres
* by Vidar Madsen <vidar@prosalg.no>
*
* Status: Last updated 1999-09-11
*
* Known issues:
* - Might crash if you click OK or Cancel before first preview is rendered
* - Phong might look weird with transparent textures
*
* Todo:
* - Saving / Loading of presets needs an overhaul
* - Antialiasing
* - Global controls: Gamma, ++
* - Beautification of GUI
* - Clean up messy source (lots of Glade remnants)
* - (Probably more. ;-)
*/
#include "config.h"
#include <string.h>
#include <errno.h>
#include <glib/gstdio.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#define PLUG_IN_PROC "plug-in-spheredesigner"
#define PLUG_IN_BINARY "sphere-designer"
#define PLUG_IN_ROLE "gimp-sphere-designer"
#define RESPONSE_RESET 1
#define PREVIEWSIZE 150
/* These must be adjusted as more functionality is added */
#define MAXOBJECT 5
#define MAXLIGHT 5
#define MAXTEXTURE 20
#define MAXTEXTUREPEROBJ 20
#define MAXNORMAL 20
#define MAXNORMALPEROBJ 20
#define MAXATMOS 1
#define MAXCOLPERGRADIENT 5
enum
{
TRIANGLE,
DISC,
PLANE,
SPHERE,
CYLINDER,
LIGHT
};
enum
{
SOLID,
CHECKER,
MARBLE,
LIZARD,
IMAGE,
PHONG,
REFLECTION,
REFRACTION,
PERLIN,
WOOD,
TRANSPARENT,
SPIRAL,
SPOTS,
SMOKE
};
enum
{
PERSPECTIVE,
ORTHOGONAL,
FISHEYE
};
enum
{
FOG
};
enum
{
TYPE,
TEXTURE,
NUM_COLUMNS
};
/* World-flags */
#define SMARTAMBIENT 0x00000001
/* Object-flags */
#define NOSHADOW 0x00000001
/* Texture-flags */
#define GRADIENT 0x00000001
typedef struct
{
gshort xsize, ysize;
guchar *rgb;
} image;
typedef struct
{
gshort numcol;
gdouble pos[MAXCOLPERGRADIENT];
GimpVector4 color[MAXCOLPERGRADIENT];
} gradient;
typedef struct
{
gint majtype;
gint type;
gulong flags;
GimpVector4 color1, color2;
gradient gradient;
GimpVector4 ambient, diffuse;
gdouble oscale;
GimpVector4 scale, translate, rotate;
image image;
GimpVector4 reflection;
GimpVector4 refraction;
GimpVector4 transparent;
gdouble ior;
GimpVector4 phongcolor;
gdouble phongsize;
gdouble amount;
gdouble exp;
GimpVector4 turbulence;
} texture;
typedef struct
{
gshort type;
gdouble density;
GimpVector4 color;
gdouble turbulence;
} atmos;
typedef struct
{
gshort type;
gulong flags;
gshort numtexture;
texture texture[MAXTEXTUREPEROBJ];
gshort numnormal;
texture normal[MAXNORMALPEROBJ];
} common;
typedef struct
{
common com;
GimpVector4 a, b, c;
} triangle;
typedef struct
{
common com;
GimpVector4 a;
gdouble b, r;
} disc;
typedef struct
{
common com;
GimpVector4 a;
gdouble r;
} sphere;
typedef struct
{
common com;
GimpVector4 a, b, c;
} cylinder;
typedef struct
{
common com;
GimpVector4 a;
gdouble b;
} plane;
typedef struct
{
common com;
GimpVector4 color;
GimpVector4 a;
} light;
typedef struct
{
GimpVector4 v1, v2;
gshort inside;
gdouble ior;
} ray;
typedef union
{
common com;
triangle tri;
disc disc;
plane plane;
sphere sphere;
cylinder cylinder;
} object;
struct world_t
{
gint numobj;
object obj[MAXOBJECT];
gint numlight;
light light[MAXLIGHT];
gint numtexture;
texture texture[MAXTEXTURE];
gulong flags;
gshort quality;
gdouble smartambient;
gshort numatmos;
atmos atmos[MAXATMOS];
};
struct camera_t
{
GimpVector4 location, lookat, up, right;
short type;
double fov, tilt;
};
typedef struct _Designer Designer;
typedef struct _DesignerClass DesignerClass;
struct _Designer
{
GimpPlugIn parent_instance;
};
struct _DesignerClass
{
GimpPlugInClass parent_class;
};
#define DESIGNER_TYPE (designer_get_type ())
#define DESIGNER (obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), DESIGNER_TYPE, Designer))
GType designer_get_type (void) G_GNUC_CONST;
static GList * designer_query_procedures (GimpPlugIn *plug_in);
static GimpProcedure * designer_create_procedure (GimpPlugIn *plug_in,
const gchar *name);
static GimpValueArray * designer_run (GimpProcedure *procedure,
GimpRunMode run_mode,
GimpImage *image,
GimpDrawable *drawable,
const GimpValueArray *args,
gpointer run_data);
static inline void vset (GimpVector4 *v,
gdouble a,
gdouble b,
gdouble c);
static void restartrender (void);
static void drawcolor1 (GtkWidget *widget);
static void drawcolor2 (GtkWidget *widget);
static gboolean render (void);
static void realrender (GimpDrawable *drawable);
static void fileselect (GtkFileChooserAction action,
GtkWidget *parent);
static gint traceray (ray *r,
GimpVector4 *col,
gint level,
gdouble imp);
static gdouble turbulence (gdouble *point,
gdouble lofreq,
gdouble hifreq);
G_DEFINE_TYPE (Designer, designer, GIMP_TYPE_PLUG_IN)
GIMP_MAIN (DESIGNER_TYPE)
static GtkWidget *drawarea = NULL;
static guchar *img;
static gint img_stride;
static cairo_surface_t *buffer;
static guint idle_id = 0;
static sphere s;
struct textures_t
{
gint index;
gchar *s;
glong n;
};
static struct textures_t textures[] =
{
{ 0, N_("Solid"), SOLID },
{ 1, N_("Checker"), CHECKER },
{ 2, N_("Marble"), MARBLE },
{ 3, N_("Lizard"), LIZARD },
{ 4, N_("Phong"), PHONG },
{ 5, N_("Noise"), PERLIN },
{ 6, N_("Wood"), WOOD },
{ 7, N_("Spiral"), SPIRAL },
{ 8, N_("Spots"), SPOTS },
{ 0, NULL, 0 }
};
#define COLORBUTTONWIDTH 30
#define COLORBUTTONHEIGHT 20
static GtkTreeView *texturelist = NULL;
static GtkAdjustment *scalexscale, *scaleyscale, *scalezscale;
static GtkAdjustment *rotxscale, *rotyscale, *rotzscale;
static GtkAdjustment *posxscale, *posyscale, *poszscale;
static GtkAdjustment *scalescale;
static GtkAdjustment *turbulencescale;
static GtkAdjustment *amountscale;
static GtkAdjustment *expscale;
static GtkWidget *typemenu;
static GtkWidget *texturemenu;
#define DOT(a,b) (a[0] * b[0] + a[1] * b[1] + a[2] * b[2])
#define B 256
static gint p[B + B + 2];
static gdouble g[B + B + 2][3];
static gboolean start = TRUE;
static GRand *gr;
static void
designer_class_init (DesignerClass *klass)
{
GimpPlugInClass *plug_in_class = GIMP_PLUG_IN_CLASS (klass);
plug_in_class->query_procedures = designer_query_procedures;
plug_in_class->create_procedure = designer_create_procedure;
}
static void
designer_init (Designer *designer)
{
}
static GList *
designer_query_procedures (GimpPlugIn *plug_in)
{
return g_list_append (NULL, g_strdup (PLUG_IN_PROC));
}
static GimpProcedure *
designer_create_procedure (GimpPlugIn *plug_in,
const gchar *name)
{
GimpProcedure *procedure = NULL;
if (! strcmp (name, PLUG_IN_PROC))
{
procedure = gimp_image_procedure_new (plug_in, name,
GIMP_PDB_PROC_TYPE_PLUGIN,
designer_run, NULL, NULL);
gimp_procedure_set_image_types (procedure, "RGB*, GRAY*");
gimp_procedure_set_menu_label (procedure, N_("Sphere _Designer..."));
gimp_procedure_add_menu_path (procedure, "<Image>/Filters/Render");
gimp_procedure_set_documentation (procedure,
N_("Create an image of a textured "
"sphere"),
"This plug-in can be used to create "
"textured and/or bumpmapped spheres, "
"and uses a small lightweight "
"raytracer to perform the task with "
"good quality",
name);
gimp_procedure_set_attribution (procedure,
"Vidar Madsen",
"Vidar Madsen",
"1999");
}
return procedure;
}
static void
init (void)
{
gint i, j, k;
gdouble v[3], s;
/* Create an array of random gradient vectors uniformly on the unit sphere */
gr = g_rand_new ();
g_rand_set_seed (gr, 1); /* Use static seed, to get reproducible results */
for (i = 0; i < B; i++)
{
do
{ /* Choose uniformly in a cube */
for (j = 0; j < 3; j++)
v[j] = g_rand_double_range (gr, -1, 1);
s = DOT (v, v);
}
while (s > 1.0); /* If not in sphere try again */
s = sqrt (s);
for (j = 0; j < 3; j++) /* Else normalize */
g[i][j] = v[j] / s;
}
/* Create a pseudorandom permutation of [1..B] */
for (i = 0; i < B; i++)
p[i] = i;
for (i = B; i > 0; i -= 2)
{
k = p[i];
p[i] = p[j = g_rand_int_range (gr, 0, B)];
p[j] = k;
}
/* Extend g and p arrays to allow for faster indexing */
for (i = 0; i < B + 2; i++)
{
p[B + i] = p[i];
for (j = 0; j < 3; j++)
g[B + i][j] = g[i][j];
}
g_rand_free (gr);
}
#define setup(i,b0,b1,r0,r1) \
t = vec[i] + 10000.; \
b0 = ((int)t) & (B-1); \
b1 = (b0+1) & (B-1); \
r0 = t - (int)t; \
r1 = r0 - 1.;
static gdouble
noise3 (gdouble * vec)
{
gint bx0, bx1, by0, by1, bz0, bz1, b00, b10, b01, b11;
gdouble rx0, rx1, ry0, ry1, rz0, rz1, *q, sx, sy, sz, a, b, c, d, t, u, v;
gint i, j;
if (start)
{
start = FALSE;
init ();
}
setup (0, bx0, bx1, rx0, rx1);
setup (1, by0, by1, ry0, ry1);
setup (2, bz0, bz1, rz0, rz1);
i = p[bx0];
j = p[bx1];
b00 = p[i + by0];
b10 = p[j + by0];
b01 = p[i + by1];
b11 = p[j + by1];
#define at(rx,ry,rz) ( rx * q[0] + ry * q[1] + rz * q[2] )
#define surve(t) ( t * t * (3. - 2. * t) )
#define lerp(t, a, b) ( a + t * (b - a) )
sx = surve (rx0);
sy = surve (ry0);
sz = surve (rz0);
q = g[b00 + bz0];
u = at (rx0, ry0, rz0);
q = g[b10 + bz0];
v = at (rx1, ry0, rz0);
a = lerp (sx, u, v);
q = g[b01 + bz0];
u = at (rx0, ry1, rz0);
q = g[b11 + bz0];
v = at (rx1, ry1, rz0);
b = lerp (sx, u, v);
c = lerp (sy, a, b); /* interpolate in y at lo x */
q = g[b00 + bz1];
u = at (rx0, ry0, rz1);
q = g[b10 + bz1];
v = at (rx1, ry0, rz1);
a = lerp (sx, u, v);
q = g[b01 + bz1];
u = at (rx0, ry1, rz1);
q = g[b11 + bz1];
v = at (rx1, ry1, rz1);
b = lerp (sx, u, v);
d = lerp (sy, a, b); /* interpolate in y at hi x */
return 1.5 * lerp (sz, c, d); /* interpolate in z */
}
static double
turbulence (gdouble * point, gdouble lofreq, gdouble hifreq)
{
gdouble freq, t, p[3];
p[0] = point[0] + 123.456;
p[1] = point[1] + 234.567;
p[2] = point[2] + 345.678;
t = 0;
for (freq = lofreq; freq < hifreq; freq *= 2.)
{
t += noise3 (p) / freq;
p[0] *= 2.;
p[1] *= 2.;
p[2] *= 2.;
}
return t - 0.3; /* readjust to make mean value = 0.0 */
}
static struct world_t world;
static inline void
vcopy (GimpVector4 *a, GimpVector4 *b)
{
*a = *b;
}
static inline void
vcross (GimpVector4 *r, GimpVector4 *a, GimpVector4 *b)
{
r->x = a->y * b->z - a->z * b->y;
r->y = -(a->x * b->z - a->z * b->x);
r->z = a->x * b->y - a->y * b->x;
}
static inline gdouble
vdot (GimpVector4 *a, GimpVector4 *b)
{
return a->x * b->x + a->y * b->y + a->z * b->z;
}
static inline gdouble
vdist (GimpVector4 *a, GimpVector4 *b)
{
gdouble x, y, z;
x = a->x - b->x;
y = a->y - b->y;
z = a->z - b->z;
return sqrt (x * x + y * y + z * z);
}
static inline gdouble
vdist2 (GimpVector4 *a, GimpVector4 *b)
{
gdouble x, y, z;
x = a->x - b->x;
y = a->y - b->y;
z = a->z - b->z;
return x * x + y * y + z * z;
}
static inline gdouble
vlen (GimpVector4 *a)
{
return sqrt (a->x * a->x + a->y * a->y + a->z * a->z);
}
static inline void
vnorm (GimpVector4 *a, gdouble v)
{
gdouble d;
d = vlen (a);
a->x *= v / d;
a->y *= v / d;
a->z *= v / d;
}
static inline void
vrotate (GimpVector4 *axis, gdouble ang, GimpVector4 *vector)
{
gdouble rad = ang / 180.0 * G_PI;
gdouble ax = vector->x;
gdouble ay = vector->y;
gdouble az = vector->z;
gdouble x = axis->x;
gdouble y = axis->y;
gdouble z = axis->z;
gdouble c = cos (rad);
gdouble s = sin (rad);
gdouble c1 = 1.0 - c;
gdouble xx = c1 * x * x;
gdouble yy = c1 * y * y;
gdouble zz = c1 * z * z;
gdouble xy = c1 * x * y;
gdouble xz = c1 * x * z;
gdouble yz = c1 * y * z;
gdouble sx = s * x;
gdouble sy = s * y;
gdouble sz = s * z;
vector->x = (xx + c) * ax + (xy + sz) * ay + (xz - sy) * az;
vector->y = (xy - sz) * ax + (yy + c) * ay + (yz + sx) * az;
vector->z = (xz + sy) * ax + (yz - sx) * ay + (zz + c) * az;
}
static inline void
vset (GimpVector4 *v, gdouble a, gdouble b, gdouble c)
{
v->x = a;
v->y = b;
v->z = c;
v->w = 1.0;
}
static inline void
vcset (GimpVector4 *v, gdouble a, gdouble b, gdouble c, gdouble d)
{
v->x = a;
v->y = b;
v->z = c;
v->w = d;
}
static inline void
vvrotate (GimpVector4 *p, GimpVector4 *rot)
{
GimpVector4 axis;
if (rot->x != 0.0)
{
vset (&axis, 1, 0, 0);
vrotate (&axis, rot->x, p);
}
if (rot->y != 0.0)
{
vset (&axis, 0, 1, 0);
vrotate (&axis, rot->y, p);
}
if (rot->z != 0.0)
{
vset (&axis, 0, 0, 1);
vrotate (&axis, rot->z, p);
}
}
static inline void
vsub (GimpVector4 *a, GimpVector4 *b)
{
a->x -= b->x;
a->y -= b->y;
a->z -= b->z;
a->w -= b->w;
}
static inline void
vadd (GimpVector4 *a, GimpVector4 *b)
{
a->x += b->x;
a->y += b->y;
a->z += b->z;
a->w += b->w;
}
static inline void
vneg (GimpVector4 *a)
{
a->x = -a->x;
a->y = -a->y;
a->z = -a->z;
a->w = -a->w;
}
static inline void
vmul (GimpVector4 *v, gdouble a)
{
v->x *= a;
v->y *= a;
v->z *= a;
v->w *= a;
}
static inline void
vvmul (GimpVector4 *a, GimpVector4 *b)
{
a->x *= b->x;
a->y *= b->y;
a->z *= b->z;
a->w *= b->w;
}
static inline void
vvdiv (GimpVector4 *a, GimpVector4 *b)
{
a->x /= b->x;
a->y /= b->y;
a->z /= b->z;
}
static void
vmix (GimpVector4 *r, GimpVector4 *a, GimpVector4 *b, gdouble v)
{
gdouble i = 1.0 - v;
r->x = a->x * v + b->x * i;
r->y = a->y * v + b->y * i;
r->z = a->z * v + b->z * i;
r->w = a->w * v + b->w * i;
}
static double
vmax (GimpVector4 *a)
{
gdouble max = fabs (a->x);
if (fabs (a->y) > max)
max = fabs (a->y);
if (fabs (a->z) > max)
max = fabs (a->z);
if (fabs (a->w) > max)
max = fabs (a->w);
return max;
}
#if 0
static void
vavg (GimpVector4 * a)
{
gdouble s;
s = (a->x + a->y + a->z) / 3.0;
a->x = a->y = a->z = s;
}
#endif
static void
trianglenormal (GimpVector4 * n, gdouble *t, triangle * tri)
{
triangle tmp;
vcopy (&tmp.b, &tri->b);
vcopy (&tmp.c, &tri->c);
vsub (&tmp.b, &tri->a);
vsub (&tmp.c, &tri->a);
vset (&tmp.a, 0, 0, 0);
vcross (n, &tmp.b, &tmp.c);
if (t)
*t = vdot (&tmp.b, &tmp.c);
}
static gdouble
checkdisc (ray * r, disc * disc)
{
GimpVector4 p, *v = &disc->a;
gdouble t, d2;
gdouble i, j, k;
i = r->v2.x - r->v1.x;
j = r->v2.y - r->v1.y;
k = r->v2.z - r->v1.z;
t = -(v->x * r->v1.x + v->y * r->v1.y + v->z * r->v1.z - disc->b) /
(v->x * i + v->y * j + v->z * k);
p.x = r->v1.x + i * t;
p.y = r->v1.y + j * t;
p.z = r->v1.z + k * t;
d2 = vdist2 (&p, v);
if (d2 > disc->r * disc->r)
t = 0.0;
return t;
}
static gdouble
checksphere (ray * r, sphere * sphere)
{
GimpVector4 cendir, rdir;
gdouble dirproj, cdlensq;
gdouble linear, constant, rsq, quadratic, discriminant;
gdouble smallzero, solmin, solmax, tolerance = 0.001;
vcopy (&rdir, &r->v2);
vsub (&rdir, &r->v1);
rsq = sphere->r * sphere->r;
vcopy (&cendir, &r->v1);
vsub (&cendir, &sphere->a);
dirproj = vdot (&rdir, &cendir);
cdlensq = vdot (&cendir, &cendir);
if ((cdlensq >= rsq) && (dirproj > 0.0))
return 0.0;
linear = 2.0 * dirproj;
constant = cdlensq - rsq;
quadratic = vdot (&rdir, &rdir);
smallzero = (constant / linear);
if ((smallzero < tolerance) && (smallzero > -tolerance))
{
solmin = -linear / quadratic;
if (solmin > tolerance)
{
return solmin;
/*
*hits = solmin;
return 1;
*/
}
else
return 0.0;
}
discriminant = linear * linear - 4.0 * quadratic * constant;
if (discriminant < 0.0)
return 0.0;
quadratic *= 2.0;
discriminant = sqrt (discriminant);
solmax = (-linear + discriminant) / (quadratic);
solmin = (-linear - discriminant) / (quadratic);
if (solmax < tolerance)
return 0.0;
if (solmin < tolerance)
{
return solmax;
/*
* hits = solmax;
* return 1;
*/
}
else
{
return solmin;
/*
* hits++ = solmin;
* hits = solmax;
* return 2;
*/
}
}
static gdouble
checkcylinder (ray * r, cylinder * cylinder)
{
/* FIXME */
return 0.0;
}
static gdouble
checkplane (ray * r, plane * plane)
{
GimpVector4 *v = &plane->a;
gdouble t;
gdouble i, j, k;
i = r->v2.x - r->v1.x;
j = r->v2.y - r->v1.y;
k = r->v2.z - r->v1.z;
t = -(v->x * r->v1.x + v->y * r->v1.y + v->z * r->v1.z - plane->b) /
(v->x * i + v->y * j + v->z * k);
return t;
}
static gdouble
checktri (ray * r, triangle * tri)
{
GimpVector4 ed1, ed2;
GimpVector4 tvec, pvec, qvec;
gdouble det, idet, t, u, v;
GimpVector4 *orig, dir;
orig = &r->v1;
dir = r->v2;
vsub (&dir, orig);
ed1.x = tri->c.x - tri->a.x;
ed1.y = tri->c.y - tri->a.y;
ed1.z = tri->c.z - tri->a.z;
ed2.x = tri->b.x - tri->a.x;
ed2.y = tri->b.y - tri->a.y;
ed2.z = tri->b.z - tri->a.z;
vcross (&pvec, &dir, &ed2);
det = vdot (&ed1, &pvec);
idet = 1.0 / det;
tvec.x = orig->x;
tvec.y = orig->y;
tvec.z = orig->z;
vsub (&tvec, &tri->a);
u = vdot (&tvec, &pvec) * idet;
if (u < 0.0)
return 0;
if (u > 1.0)
return 0;
vcross (&qvec, &tvec, &ed1);
v = vdot (&dir, &qvec) * idet;
if ((v < 0.0) || (u + v > 1.0))
return 0;
t = vdot (&ed2, &qvec) * idet;
return t;
}
static void
transformpoint (GimpVector4 * p, texture * t)
{
gdouble point[3], f;
if ((t->rotate.x != 0.0) || (t->rotate.y != 0.0) || (t->rotate.z != 0.0))
vvrotate (p, &t->rotate);
vvdiv (p, &t->scale);
vsub (p, &t->translate);
if ((t->turbulence.x != 0.0) || (t->turbulence.y != 0.0) ||
(t->turbulence.z != 0.0))
{
point[0] = p->x;
point[1] = p->y;
point[2] = p->z;
f = turbulence (point, 1, 256);
p->x += t->turbulence.x * f;
p->y += t->turbulence.y * f;
p->z += t->turbulence.z * f;
}
}
static void
checker (GimpVector4 *q, GimpVector4 *col, texture *t)
{
gint c = 0;
GimpVector4 p;
p = *q;
transformpoint (&p, t);
vmul (&p, 0.25);
p.x += 0.00001;
p.y += 0.00001;
p.z += 0.00001;
if (p.x < 0.0)
p.x = 0.5 - p.x;
if (p.y < 0.0)
p.y = 0.5 - p.y;
if (p.z < 0.0)
p.z = 0.5 - p.z;
if ((p.x - (gint) p.x) < 0.5)
c ^= 1;
if ((p.y - (gint) p.y) < 0.5)
c ^= 1;
if ((p.z - (gint) p.z) < 0.5)
c ^= 1;
*col = (c) ? t->color1 : t->color2;
}
static void
gradcolor (GimpVector4 *col, gradient *t, gdouble val)
{
gint i;
gdouble d;
GimpVector4 tmpcol;
val = CLAMP (val, 0.0, 1.0);
for (i = 0; i < t->numcol; i++)
{
if (t->pos[i] == val)
{
*col = t->color[i];
return;
}
if (t->pos[i] > val)
{
d = (val - t->pos[i - 1]) / (t->pos[i] - t->pos[i - 1]);
vcopy (&tmpcol, &t->color[i]);
vmul (&tmpcol, d);
vcopy (col, &tmpcol);
vcopy (&tmpcol, &t->color[i - 1]);
vmul (&tmpcol, 1.0 - d);
vadd (col, &tmpcol);
return;
}
}
g_printerr ("Error in gradient!\n");
vset (col, 0, 1, 0);
}
static void
marble (GimpVector4 *q, GimpVector4 *col, texture *t)
{
gdouble f;
GimpVector4 p;
p = *q;
transformpoint (&p, t);
f = sin (p.x * 4) / 2 + 0.5;
f = pow (f, t->exp);
if (t->flags & GRADIENT)
gradcolor (col, &t->gradient, f);
else
vmix (col, &t->color1, &t->color2, f);
}
static void
lizard (GimpVector4 *q, GimpVector4 *col, texture *t)
{
gdouble f;
GimpVector4 p;
p = *q;
transformpoint (&p, t);
f = fabs (sin (p.x * 4));
f += fabs (sin (p.y * 4));
f += fabs (sin (p.z * 4));
f /= 3.0;
f = pow (f, t->exp);
if (t->flags & GRADIENT)
gradcolor (col, &t->gradient, f);
else
vmix (col, &t->color1, &t->color2, f);
}
static void
wood (GimpVector4 *q, GimpVector4 *col, texture *t)
{
gdouble f;
GimpVector4 p;
p = *q;
transformpoint (&p, t);
f = fabs (p.x);
f = f - (int) f;
f = pow (f, t->exp);
if (t->flags & GRADIENT)
gradcolor (col, &t->gradient, f);
else
vmix (col, &t->color1, &t->color2, f);
}
static void
spiral (GimpVector4 *q, GimpVector4 *col, texture *t)
{
gdouble f;
GimpVector4 p;
p = *q;
transformpoint (&p, t);
f = fabs (atan2 (p.x, p.z) / G_PI / 2 + p.y + 99999);
f = f - (int) f;
f = pow (f, t->exp);
if (t->flags & GRADIENT)
gradcolor (col, &t->gradient, f);
else
vmix (col, &t->color1, &t->color2, f);
}
static void
spots (GimpVector4 *q, GimpVector4 *col, texture *t)
{
gdouble f;
GimpVector4 p, r;
p = *q;
transformpoint (&p, t);
p.x += 10000.0;
p.y += 10000.0;
p.z += 10000.0;
vset (&r, (gint) (p.x + 0.5), (gint) (p.y + 0.5), (gint) (p.z + 0.5));
f = vdist (&p, &r);
f = cos (f * G_PI);
f = CLAMP (f, 0.0, 1.0);
f = pow (f, t->exp);
if (t->flags & GRADIENT)
gradcolor (col, &t->gradient, f);
else
vmix (col, &t->color1, &t->color2, f);
}
static void
perlin (GimpVector4 * q, GimpVector4 * col, texture * t)
{
gdouble f, point[3];
GimpVector4 p;
p = *q;
transformpoint (&p, t);
point[0] = p.x;
point[1] = p.y;
point[2] = p.z;
f = turbulence (point, 1, 256) * 0.3 + 0.5;
f = pow (f, t->exp);
if (t->flags & GRADIENT)
gradcolor (col, &t->gradient, f);
else
vmix (col, &t->color1, &t->color2, f);
}
static void
imagepixel (GimpVector4 * q, GimpVector4 * col, texture * t)
{
GimpVector4 p;
gint x, y;
guchar *rgb;
p = *q;
transformpoint (&p, t);
x = (p.x * t->image.xsize);
y = (p.y * t->image.ysize);
x = (x % t->image.xsize + t->image.xsize) % t->image.xsize;
y = (y % t->image.ysize + t->image.ysize) % t->image.ysize;
rgb = &t->image.rgb[x * 3 + (t->image.ysize - 1 - y) * t->image.xsize * 3];
vset (col, rgb[0] / 255.0, rgb[1] / 255.0, rgb[2] / 255.0);
}
static void
objcolor (GimpVector4 *col, GimpVector4 *p, common *obj)
{
gint i;
texture *t;
GimpVector4 tmpcol;
vcset (col, 0, 0, 0, 0);
for (i = 0; i < obj->numtexture; i++)
{
t = &obj->texture[i];
if (world.quality < 1)
{
vadd (col, &t->color1);
continue;
}
vset (&tmpcol, 0, 0, 0);
switch (t->type)
{
case SOLID:
vcopy (&tmpcol, &t->color1);
break;
case CHECKER:
checker (p, &tmpcol, t);
break;
case MARBLE:
marble (p, &tmpcol, t);
break;
case LIZARD:
lizard (p, &tmpcol, t);
break;
case PERLIN:
perlin (p, &tmpcol, t);
break;
case WOOD:
wood (p, &tmpcol, t);
break;
case SPIRAL:
spiral (p, &tmpcol, t);
break;
case SPOTS:
spots (p, &tmpcol, t);
break;
case IMAGE:
imagepixel (p, &tmpcol, t);
break;
case PHONG:
case REFRACTION:
case REFLECTION:
case TRANSPARENT:
case SMOKE:
/* Silently ignore non-color textures */
continue;
break;
default:
g_printerr ("Warning: unknown texture %d\n", t->type);
break;
}
vmul (&tmpcol, t->amount);
vadd (col, &tmpcol);
}
if (!i)
{
g_printerr ("Warning: object %p has no textures\n", obj);
}
}
static void
objnormal (GimpVector4 *res, common *obj, GimpVector4 *p)
{
gint i;
switch (obj->type)
{
case TRIANGLE:
trianglenormal (res, NULL, (triangle *) obj);
break;
case DISC:
vcopy (res, &((disc *) obj)->a);
break;
case PLANE:
vcopy (res, &((plane *) obj)->a);
break;
case SPHERE:
vcopy (res, &((sphere *) obj)->a);
vsub (res, p);
break;
case CYLINDER:
vset (res, 1, 1, 1); /* fixme */
break;
default:
g_error ("objnormal(): Unsupported object type!?\n");
}
vnorm (res, 1.0);
for (i = 0; i < obj->numnormal; i++)
{
gint k;
GimpVector4 tmpcol[6];
GimpVector4 q[6], nres;
texture *t = &obj->normal[i];
gdouble nstep = 0.1;
vset (&nres, 0, 0, 0);
for (k = 0; k < 6; k++)
{
vcopy (&q[k], p);
}
q[0].x += nstep;
q[1].x -= nstep;
q[2].y += nstep;
q[3].y -= nstep;
q[4].z += nstep;
q[5].z -= nstep;
switch (t->type)
{
case MARBLE:
for (k = 0; k < 6; k++)
marble (&q[k], &tmpcol[k], t);
break;
case LIZARD:
for (k = 0; k < 6; k++)
lizard (&q[k], &tmpcol[k], t);
break;
case PERLIN:
for (k = 0; k < 6; k++)
perlin (&q[k], &tmpcol[k], t);
break;
case WOOD:
for (k = 0; k < 6; k++)
wood (&q[k], &tmpcol[k], t);
break;
case SPIRAL:
for (k = 0; k < 6; k++)
spiral (&q[k], &tmpcol[k], t);
break;
case SPOTS:
for (k = 0; k < 6; k++)
spots (&q[k], &tmpcol[k], t);
break;
case IMAGE:
for (k = 0; k < 6; k++)
imagepixel (&q[k], &tmpcol[k], t);
break;
case CHECKER:
case SOLID:
case PHONG:
case REFRACTION:
case REFLECTION:
case TRANSPARENT:
case SMOKE:
continue;
break;
default:
g_printerr ("Warning: unknown texture %d\n", t->type);
break;
}
nres.x = tmpcol[0].x - tmpcol[1].x;
nres.y = tmpcol[2].x - tmpcol[3].x;
nres.z = tmpcol[4].x - tmpcol[5].x;
vadd (&nres, res);
vnorm (&nres, 1.0);
vmul (&nres, t->amount);
vadd (res, &nres);
vnorm (res, 1.0);
}
}
/*
Quality:
0 = Color only
1 = Textures
2 = Light + Normals
3 = Shadows
4 = Phong
5 = Reflection + Refraction
*/
static void
calclight (GimpVector4 * col, GimpVector4 * point, common * obj)
{
gint i, j;
ray r;
gdouble b, a;
GimpVector4 lcol;
GimpVector4 norm;
GimpVector4 pcol;
vcset (col, 0, 0, 0, 0);
objcolor (&pcol, point, obj);
a = pcol.w;
if (world.quality < 2)
{
vcopy (col, &pcol);
return;
}
for (i = 0; i < obj->numtexture; i++)
{
if (obj->texture[i].type == PHONG)
continue;
if (obj->texture[i].type == REFLECTION)
continue;
if (obj->texture[i].type == REFRACTION)
continue;
if (obj->texture[i].type == TRANSPARENT)
continue;
if (obj->texture[i].type == SMOKE)
continue;
vcopy (&lcol, &pcol);
vvmul (&lcol, &obj->texture[i].ambient);
vadd (col, &lcol);
}
objnormal (&norm, obj, point);
vnorm (&norm, 1.0);
r.inside = -1;
r.ior = 1.0;
for (i = 0; i < world.numlight; i++)
{
vcopy (&r.v1, point);
vcopy (&r.v2, &world.light[i].a);
vmix (&r.v1, &r.v1, &r.v2, 0.9999);
vsub (&r.v1, &r.v2);
vnorm (&r.v1, 1.0);
b = vdot (&r.v1, &norm);
if (b < 0.0)
continue;
for (j = 0; j < obj->numtexture; j++)
{
if (obj->texture[j].type == PHONG)
continue;
if (obj->texture[j].type == REFLECTION)
continue;
if (obj->texture[j].type == REFRACTION)
continue;
if (obj->texture[j].type == TRANSPARENT)
continue;
if (obj->texture[j].type == SMOKE)
continue;
vcopy (&lcol, &pcol);
vvmul (&lcol, &world.light[i].color);
vvmul (&lcol, &obj->texture[j].diffuse);
vmul (&lcol, b);
vadd (col, &lcol);
}
}
col->w = a;
}
static void
calcphong (common * obj, ray * r2, GimpVector4 * col)
{
gint i, j;
ray r;
gdouble b;
GimpVector4 lcol;
GimpVector4 norm;
GimpVector4 pcol;
gdouble ps;
vcopy (&pcol, col);
vcopy (&norm, &r2->v2);
vsub (&norm, &r2->v1);
vnorm (&norm, 1.0);
r.inside = -1;
r.ior = 1.0;
for (i = 0; i < world.numlight; i++)
{
vcopy (&r.v1, &r2->v1);
vcopy (&r.v2, &world.light[i].a);
vmix (&r.v1, &r.v1, &r.v2, 0.9999);
if (traceray (&r, NULL, -1, 1.0))
continue;
/* OK, light is visible */
vsub (&r.v1, &r.v2);
vnorm (&r.v1, 1.0);
b = -vdot (&r.v1, &norm);
for (j = 0; j < obj->numtexture; j++)
{
if (obj->texture[j].type != PHONG)
continue;
ps = obj->texture[j].phongsize;
if (b < (1 - ps))
continue;
ps = (b - (1 - ps)) / ps;
vcopy (&lcol, &obj->texture[j].phongcolor);
vvmul (&lcol, &world.light[i].color);
vmul (&lcol, ps);
vadd (col, &lcol);
}
}
}
static int
traceray (ray * r, GimpVector4 * col, gint level, gdouble imp)
{
gint i, b = -1;
gdouble t = -1.0, min = 0.0;
common *obj, *bobj = NULL;
gint hits = 0;
GimpVector4 p;
if ((level == 0) || (imp < 0.005))
{
vset (col, 0, 1, 0);
return 0;
}
for (i = 0; i < world.numobj; i++)
{
obj = (common *) & world.obj[i];
switch (obj->type)
{
case TRIANGLE:
t = checktri (r, (triangle *) & world.obj[i]);
break;
case DISC:
t = checkdisc (r, (disc *) & world.obj[i]);
break;
case PLANE:
t = checkplane (r, (plane *) & world.obj[i]);
break;
case SPHERE:
t = checksphere (r, (sphere *) & world.obj[i]);
break;
case CYLINDER:
t = checkcylinder (r, (cylinder *) & world.obj[i]);
break;
default:
g_error ("Illegal object!!\n");
}
if (t <= 0.0)
continue;
if (!(obj->flags & NOSHADOW) && (level == -1))
{
return i + 1;
}
hits++;
if ((!bobj) || (t < min))
{
min = t;
b = i;
bobj = obj;
}
}
if (level == -1)
return 0;
if (bobj)
{
p.x = r->v1.x + (r->v2.x - r->v1.x) * min;
p.y = r->v1.y + (r->v2.y - r->v1.y) * min;
p.z = r->v1.z + (r->v2.z - r->v1.z) * min;
calclight (col, &p, bobj);
if (world.flags & SMARTAMBIENT)
{
gdouble ambient = 0.3 * exp (-min / world.smartambient);
GimpVector4 lcol;
objcolor (&lcol, &p, bobj);
vmul (&lcol, ambient);
vadd (col, &lcol);
}
for (i = 0; i < bobj->numtexture; i++)
{
if ((world.quality >= 4)
&& ((bobj->texture[i].type == REFLECTION)
|| (bobj->texture[i].type == PHONG)))
{
GimpVector4 refcol, norm, ocol;
ray ref;
objcolor (&ocol, &p, bobj);
vcopy (&ref.v1, &p);
vcopy (&ref.v2, &r->v1);
ref.inside = r->inside;
ref.ior = r->ior;
vmix (&ref.v1, &ref.v1, &ref.v2, 0.9999); /* push it a tad */
vsub (&ref.v2, &p);
objnormal (&norm, bobj, &p);
vnorm (&norm, 1.0);
vrotate (&norm, 180.0, &ref.v2);
vmul (&norm, -0.0001); /* push it a tad */
vadd (&ref.v1, &norm);
vnorm (&ref.v2, 1.0);
vadd (&ref.v2, &p);
if ((world.quality >= 5)
&& (bobj->texture[i].type == REFLECTION))
{
traceray (&ref, &refcol, level - 1,
imp * vmax (&bobj->texture[i].reflection));
vvmul (&refcol, &bobj->texture[i].reflection);
refcol.w = ocol.w;
vadd (col, &refcol);
}
if (bobj->texture[i].type == PHONG)
{
vcset (&refcol, 0, 0, 0, 0);
calcphong (bobj, &ref, &refcol);
refcol.w = ocol.w;
vadd (col, &refcol);
}
}
if ((world.quality >= 5) && (col->w < 1.0))
{
GimpVector4 refcol;
ray ref;
vcopy (&ref.v1, &p);
vcopy (&ref.v2, &p);
vsub (&ref.v2, &r->v1);
vnorm (&ref.v2, 1.0);
vadd (&ref.v2, &p);
vmix (&ref.v1, &ref.v1, &ref.v2, 0.999); /* push it a tad */
traceray (&ref, &refcol, level - 1, imp * (1.0 - col->w));
vmul (&refcol, (1.0 - col->w));
vadd (col, &refcol);
}
if ((world.quality >= 5) && (bobj->texture[i].type == TRANSPARENT))
{
GimpVector4 refcol;
ray ref;
vcopy (&ref.v1, &p);
vcopy (&ref.v2, &p);
vsub (&ref.v2, &r->v1);
vnorm (&ref.v2, 1.0);
vadd (&ref.v2, &p);
vmix (&ref.v1, &ref.v1, &ref.v2, 0.999); /* push it a tad */
traceray (&ref, &refcol, level - 1,
imp * vmax (&bobj->texture[i].transparent));
vvmul (&refcol, &bobj->texture[i].transparent);
vadd (col, &refcol);
}
if ((world.quality >= 5) && (bobj->texture[i].type == SMOKE))
{
GimpVector4 smcol, raydir, norm;
double tran;
ray ref;
vcopy (&ref.v1, &p);
vcopy (&ref.v2, &p);
vsub (&ref.v2, &r->v1);
vnorm (&ref.v2, 1.0);
vadd (&ref.v2, &p);
objnormal (&norm, bobj, &p);
vcopy (&raydir, &r->v2);
vsub (&raydir, &r->v1);
vnorm (&raydir, 1.0);
tran = vdot (&norm, &raydir);
if (tran < 0.0)
continue;
tran *= tran;
vcopy (&smcol, &bobj->texture[i].color1);
vmul (&smcol, tran);
vadd (col, &smcol);
}
if ((world.quality >= 5) && (bobj->texture[i].type == REFRACTION))
{
GimpVector4 refcol, norm, tmpv;
ray ref;
double c1, c2, n1, n2, n;
vcopy (&ref.v1, &p);
vcopy (&ref.v2, &p);
vsub (&ref.v2, &r->v1);
vadd (&ref.v2, &r->v2);
vmix (&ref.v1, &ref.v1, &ref.v2, 0.999); /* push it a tad */
vsub (&ref.v2, &p);
objnormal (&norm, bobj, &p);
if (r->inside == b)
{
ref.inside = -1;
ref.ior = 1.0;
}
else
{
ref.inside = b;
ref.ior = bobj->texture[i].ior;
}
c1 = vdot (&norm, &ref.v2);
if (ref.inside < 0)
c1 = -c1;
n1 = r->ior; /* IOR of current media */
n2 = ref.ior; /* IOR of new media */
n = n1 / n2;
c2 = 1.0 - n * n * (1.0 - c1 * c1);
if (c2 < 0.0)
{
/* FIXME: Internal reflection should occur */
c2 = sqrt (-c2);
}
else
{
c2 = sqrt (c2);
}
vmul (&ref.v2, n);
vcopy (&tmpv, &norm);
vmul (&tmpv, n * c1 - c2);
vadd (&ref.v2, &tmpv);
vnorm (&ref.v2, 1.0);
vadd (&ref.v2, &p);
traceray (&ref, &refcol, level - 1,
imp * vmax (&bobj->texture[i].refraction));
vvmul (&refcol, &bobj->texture[i].refraction);
vadd (col, &refcol);
}
}
}
else
{
vcset (col, 0, 0, 0, 0);
min = 10000.0;
vcset (&p, 0, 0, 0, 0);
}
for (i = 0; i < world.numatmos; i++)
{
GimpVector4 tmpcol;
if (world.atmos[i].type == FOG)
{
gdouble v, pt[3];
pt[0] = p.x;
pt[1] = p.y;
pt[2] = p.z;
if ((v = world.atmos[i].turbulence) > 0.0)
v = turbulence (pt, 1, 256) * world.atmos[i].turbulence;
v = exp (-(min + v) / world.atmos[i].density);
vmul (col, v);
vcopy (&tmpcol, &world.atmos[i].color);
vmul (&tmpcol, 1.0 - v);
vadd (col, &tmpcol);
}
}
return hits;
}
static void
setdefaults (texture * t)
{
memset (t, 0, sizeof (texture));
t->type = SOLID;
vcset (&t->color1, 1, 1, 1, 1);
vcset (&t->color2, 0, 0, 0, 1);
vcset (&t->diffuse, 1, 1, 1, 1);
vcset (&t->ambient, 0, 0, 0, 1);
vset (&t->scale, 1, 1, 1);
vset (&t->rotate, 0, 0, 0);
vset (&t->translate, 0, 0, 0);
t->oscale = 1.0;
t->amount = 1.0;
t->exp = 1.0;
}
static gchar *
mklabel (texture * t)
{
struct textures_t *l;
static gchar tmps[100];
if (t->majtype == 0)
strcpy (tmps, _("Texture"));
else if (t->majtype == 1)
strcpy (tmps, _("Bumpmap"));
else if (t->majtype == 2)
strcpy (tmps, _("Light"));
else
strcpy (tmps, "<unknown>");
if ((t->majtype == 0) || (t->majtype == 1))
{
strcat (tmps, " / ");
l = textures;
while (l->s)
{
if (t->type == l->n)
{
strcat (tmps, gettext (l->s));
break;
}
l++;
}
}
return tmps;
}
static texture *
currenttexture (void)
{
GtkTreeSelection *sel;
GtkTreeIter iter;
texture *t = NULL;
sel = gtk_tree_view_get_selection (texturelist);
if (gtk_tree_selection_get_selected (sel, NULL, &iter))
{
gtk_tree_model_get (gtk_tree_view_get_model (texturelist), &iter,
TEXTURE, &t,
-1);
}
return t;
}
static void
relabel (void)
{
GtkTreeModel *model;
GtkTreeSelection *sel;
GtkTreeIter iter;
texture *t = NULL;
sel = gtk_tree_view_get_selection (texturelist);
if (gtk_tree_selection_get_selected (sel, NULL, &iter))
{
model = gtk_tree_view_get_model (texturelist);
gtk_tree_model_get (model, &iter,
TEXTURE, &t,
-1);
gtk_list_store_set (GTK_LIST_STORE (model), &iter,
TYPE, mklabel (t),
-1);
}
}
static gboolean noupdate = FALSE;
static void
setvals (texture *t)
{
struct textures_t *l;
if (!t)
return;
noupdate = TRUE;
gtk_adjustment_set_value (amountscale, t->amount);
gtk_adjustment_set_value (scalescale, t->oscale);
gtk_adjustment_set_value (scalexscale, t->scale.x);
gtk_adjustment_set_value (scaleyscale, t->scale.y);
gtk_adjustment_set_value (scalezscale, t->scale.z);
gtk_adjustment_set_value (rotxscale, t->rotate.x);
gtk_adjustment_set_value (rotyscale, t->rotate.y);
gtk_adjustment_set_value (rotzscale, t->rotate.z);
gtk_adjustment_set_value (posxscale, t->translate.x);
gtk_adjustment_set_value (posyscale, t->translate.y);
gtk_adjustment_set_value (poszscale, t->translate.z);
gtk_adjustment_set_value (turbulencescale, t->turbulence.x);
gtk_adjustment_set_value (expscale, t->exp);
drawcolor1 (NULL);
drawcolor2 (NULL);
l = textures;
while (l->s)
{
if (l->n == t->type)
{
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (texturemenu),
l->index);
break;
}
l++;
}
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (typemenu), t->majtype);
noupdate = FALSE;
}
static void
selectitem (GtkTreeSelection *treeselection,
gpointer data)
{
setvals (currenttexture ());
}
static void
addtexture (void)
{
GtkListStore *list_store;
GtkTreeIter iter;
gint n = s.com.numtexture;
if (n == MAXTEXTUREPEROBJ - 1)
return;
setdefaults (&s.com.texture[n]);
list_store = GTK_LIST_STORE (gtk_tree_view_get_model (texturelist));
gtk_list_store_append (list_store, &iter);
gtk_list_store_set (list_store, &iter,
TYPE, mklabel (&s.com.texture[n]),
TEXTURE, &s.com.texture[n],
-1);
gtk_tree_selection_select_iter (gtk_tree_view_get_selection (texturelist),
&iter);
s.com.numtexture++;
restartrender ();
}
static void
duptexture (void)
{
GtkListStore *list_store;
GtkTreeIter iter;
texture *t = currenttexture ();
gint n = s.com.numtexture;
if (n == MAXTEXTUREPEROBJ - 1)
return;
if (!t)
return;
s.com.texture[n] = *t;
list_store = GTK_LIST_STORE (gtk_tree_view_get_model (texturelist));
gtk_list_store_append (list_store, &iter);
gtk_list_store_set (list_store, &iter,
TYPE, mklabel (&s.com.texture[n]),
TEXTURE, &s.com.texture[n],
-1);
gtk_tree_selection_select_iter (gtk_tree_view_get_selection (texturelist),
&iter);
s.com.numtexture++;
restartrender ();
}
static void
rebuildlist (void)
{
GtkListStore *list_store;
GtkTreeSelection *sel;
GtkTreeIter iter;
gint n;
sel = gtk_tree_view_get_selection (texturelist);
for (n = 0; n < s.com.numtexture; n++)
{
if (s.com.numtexture && (s.com.texture[n].majtype < 0))
{
gint i;
for (i = n; i < s.com.numtexture - 1; i++)
s.com.texture[i] = s.com.texture[i + 1];
s.com.numtexture--;
n--;
}
}
list_store = GTK_LIST_STORE (gtk_tree_view_get_model (texturelist));
for (n = 0; n < s.com.numtexture; n++)
{
gtk_list_store_append (list_store, &iter);
gtk_list_store_set (list_store, &iter,
TYPE, mklabel (&s.com.texture[n]),
TEXTURE, &s.com.texture[n],
-1);
}
if (gtk_tree_model_get_iter_first (GTK_TREE_MODEL (list_store), &iter))
gtk_tree_selection_select_iter (sel, &iter);
restartrender ();
}
static void
deltexture (void)
{
GtkTreeSelection *sel;
GtkTreeModel *model;
GtkTreeIter iter;
texture *t = NULL;
sel = gtk_tree_view_get_selection (texturelist);
if (gtk_tree_selection_get_selected (sel, NULL, &iter))
{
model = gtk_tree_view_get_model (texturelist);
gtk_tree_model_get (model, &iter,
TEXTURE, &t,
-1);
t->majtype = -1;
gtk_list_store_remove (GTK_LIST_STORE (model), &iter);
}
restartrender ();
}
static void
loadit (const gchar * fn)
{
FILE *f;
gchar endbuf[21 * (G_ASCII_DTOSTR_BUF_SIZE + 1)];
gchar *end = endbuf;
gchar line[1024];
gchar fmt_str[16];
gint i;
texture *t;
gint majtype, type;
f = g_fopen (fn, "rt");
if (! f)
{
g_message (_("Could not open '%s' for reading: %s"),
gimp_filename_to_utf8 (fn), g_strerror (errno));
return;
}
if (2 != fscanf (f, "%d %d", &majtype, &type) || majtype < 0 || majtype > 2)
{
g_message (_("File '%s' is not a valid save file."),
gimp_filename_to_utf8 (fn));
fclose (f);
return;
}
rewind (f);
s.com.numtexture = 0;
snprintf (fmt_str, sizeof (fmt_str), "%%d %%d %%%" G_GSIZE_FORMAT "s", sizeof (endbuf) - 1);
while (!feof (f))
{
if (!fgets (line, 1023, f))
break;
i = s.com.numtexture;
t = &s.com.texture[i];
setdefaults (t);
if (sscanf (line, fmt_str, &t->majtype, &t->type, end) != 3)
t->color1.x = g_ascii_strtod (end, &end);
if (end && errno != ERANGE)
t->color1.y = g_ascii_strtod (end, &end);
if (end && errno != ERANGE)
t->color1.z = g_ascii_strtod (end, &end);
if (end && errno != ERANGE)
t->color1.w = g_ascii_strtod (end, &end);
if (end && errno != ERANGE)
t->color2.x = g_ascii_strtod (end, &end);
if (end && errno != ERANGE)
t->color2.y = g_ascii_strtod (end, &end);
if (end && errno != ERANGE)
t->color2.z = g_ascii_strtod (end, &end);
if (end && errno != ERANGE)
t->color2.w = g_ascii_strtod (end, &end);
if (end && errno != ERANGE)
t->oscale = g_ascii_strtod (end, &end);
if (end && errno != ERANGE)
t->turbulence.x = g_ascii_strtod (end, &end);
if (end && errno != ERANGE)
t->amount = g_ascii_strtod (end, &end);
if (end && errno != ERANGE)
t->exp = g_ascii_strtod (end, &end);
if (end && errno != ERANGE)
t->scale.x = g_ascii_strtod (end, &end);
if (end && errno != ERANGE)
t->scale.y = g_ascii_strtod (end, &end);
if (end && errno != ERANGE)
t->scale.z = g_ascii_strtod (end, &end);
if (end && errno != ERANGE)
t->rotate.x = g_ascii_strtod (end, &end);
if (end && errno != ERANGE)
t->rotate.y = g_ascii_strtod (end, &end);
if (end && errno != ERANGE)
t->rotate.z = g_ascii_strtod (end, &end);
if (end && errno != ERANGE)
t->translate.x = g_ascii_strtod (end, &end);
if (end && errno != ERANGE)
t->translate.y = g_ascii_strtod (end, &end);
if (end && errno != ERANGE)
t->translate.z = g_ascii_strtod (end, &end);
s.com.numtexture++;
}
fclose (f);
}
static void
loadpreset_response (GtkWidget *dialog,
gint response_id,
gpointer data)
{
if (response_id == GTK_RESPONSE_OK)
{
GtkTreeModel *model = gtk_tree_view_get_model (texturelist);
gchar *name;
name = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (dialog));
gtk_list_store_clear (GTK_LIST_STORE (model));
loadit (name);
g_free (name);
rebuildlist ();
}
gtk_widget_hide (dialog);
}
static void
saveit (const gchar *fn)
{
gint i;
FILE *f;
gchar buf[G_ASCII_DTOSTR_BUF_SIZE];
f = g_fopen (fn, "wt");
if (!f)
{
g_message (_("Could not open '%s' for writing: %s"),
gimp_filename_to_utf8 (fn), g_strerror (errno));
return;
}
for (i = 0; i < s.com.numtexture; i++)
{
texture *t = &s.com.texture[i];
if (t->majtype < 0)
continue;
fprintf (f, "%d %d", t->majtype, t->type);
fprintf (f, " %s", g_ascii_dtostr (buf, sizeof (buf), t->color1.x));
fprintf (f, " %s", g_ascii_dtostr (buf, sizeof (buf), t->color1.y));
fprintf (f, " %s", g_ascii_dtostr (buf, sizeof (buf), t->color1.z));
fprintf (f, " %s", g_ascii_dtostr (buf, sizeof (buf), t->color1.w));
fprintf (f, " %s", g_ascii_dtostr (buf, sizeof (buf), t->color2.x));
fprintf (f, " %s", g_ascii_dtostr (buf, sizeof (buf), t->color2.y));
fprintf (f, " %s", g_ascii_dtostr (buf, sizeof (buf), t->color2.z));
fprintf (f, " %s", g_ascii_dtostr (buf, sizeof (buf), t->color2.w));
fprintf (f, " %s", g_ascii_dtostr (buf, sizeof (buf), t->oscale));
fprintf (f, " %s", g_ascii_dtostr (buf, sizeof (buf), t->turbulence.x));
fprintf (f, " %s", g_ascii_dtostr (buf, sizeof (buf), t->amount));
fprintf (f, " %s", g_ascii_dtostr (buf, sizeof (buf), t->exp));
fprintf (f, " %s", g_ascii_dtostr (buf, sizeof (buf), t->scale.x));
fprintf (f, " %s", g_ascii_dtostr (buf, sizeof (buf), t->scale.y));
fprintf (f, " %s", g_ascii_dtostr (buf, sizeof (buf), t->scale.z));
fprintf (f, " %s", g_ascii_dtostr (buf, sizeof (buf), t->rotate.x));
fprintf (f, " %s", g_ascii_dtostr (buf, sizeof (buf), t->rotate.y));
fprintf (f, " %s", g_ascii_dtostr (buf, sizeof (buf), t->rotate.z));
fprintf (f, " %s", g_ascii_dtostr (buf, sizeof (buf), t->translate.x));
fprintf (f, " %s", g_ascii_dtostr (buf, sizeof (buf), t->translate.y));
fprintf (f, " %s", g_ascii_dtostr (buf, sizeof (buf), t->translate.z));
fprintf (f, "\n");
}
fclose (f);
}
static void
savepreset_response (GtkWidget *dialog,
gint response_id,
gpointer data)
{
if (response_id == GTK_RESPONSE_OK)
{
gchar *name = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (dialog));
saveit (name);
g_free (name);
}
gtk_widget_hide (dialog);
}
static void
loadpreset (GtkWidget *widget,
GtkWidget *parent)
{
fileselect (GTK_FILE_CHOOSER_ACTION_OPEN, parent);
}
static void
savepreset (GtkWidget *widget,
GtkWidget *parent)
{
fileselect (GTK_FILE_CHOOSER_ACTION_SAVE, parent);
}
static void
fileselect (GtkFileChooserAction action,
GtkWidget *parent)
{
static GtkWidget *windows[2] = { NULL, NULL };
gchar *titles[] = { N_("Open File"), N_("Save File") };
void *handlers[] = { loadpreset_response, savepreset_response };
if (! windows[action])
{
GtkWidget *dialog = windows[action] =
gtk_file_chooser_dialog_new (gettext (titles[action]),
GTK_WINDOW (parent),
action,
_("_Cancel"), GTK_RESPONSE_CANCEL,
action == GTK_FILE_CHOOSER_ACTION_OPEN ?
_("_Open") : _("_Save"),
GTK_RESPONSE_OK,
NULL);
gimp_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
gtk_dialog_set_default_response (GTK_DIALOG (dialog), GTK_RESPONSE_OK);
if (action == GTK_FILE_CHOOSER_ACTION_SAVE)
gtk_file_chooser_set_do_overwrite_confirmation (GTK_FILE_CHOOSER (dialog),
TRUE);
g_signal_connect (dialog, "destroy",
G_CALLBACK (gtk_widget_destroyed),
&windows[action]);
g_signal_connect (dialog, "response",
G_CALLBACK (handlers[action]),
NULL);
}
gtk_window_present (GTK_WINDOW (windows[action]));
}
static void
initworld (void)
{
gint i;
memset (&world, 0, sizeof (world));
s.com.type = SPHERE;
s.a.x = s.a.y = s.a.z = 0.0;
s.r = 4.0;
/* not: world.obj[0] = s;
* s is a sphere so error C2115: '=' : incompatible types
*/
memcpy (&world.obj[0], &s, sizeof (s));
world.numobj = 1;
world.obj[0].com.numtexture = 0;
world.obj[0].com.numnormal = 0;
for (i = 0; i < s.com.numtexture; i++)
{
common *c = &s.com;
common *d = &world.obj[0].com;
texture *t = &c->texture[i];
if ((t->amount <= 0.0) || (t->majtype < 0))
continue;
if (t->majtype == 0)
{ /* Normal texture */
if (t->type == PHONG)
{
t->phongcolor = t->color1;
t->phongsize = t->oscale / 25.0;
}
d->texture[d->numtexture] = *t;
vmul (&d->texture[d->numtexture].scale,
d->texture[d->numtexture].oscale);
d->numtexture++;
}
else if (t->majtype == 1)
{ /* Bumpmap */
d->normal[d->numnormal] = *t;
vmul (&d->normal[d->numnormal].scale,
d->texture[d->numnormal].oscale);
d->numnormal++;
}
else if (t->majtype == 2)
{ /* Lightsource */
light l;
vcopy (&l.a, &t->translate);
vcopy (&l.color, &t->color1);
vmul (&l.color, t->amount);
world.light[world.numlight] = l;
world.numlight++;
}
}
world.quality = 5;
world.flags |= SMARTAMBIENT;
world.smartambient = 40.0;
}
static gboolean
draw (GtkWidget *widget,
cairo_t *cr)
{
cairo_set_source_surface (cr, buffer, 0.0, 0.0);
cairo_paint (cr);
return TRUE;
}
static void
restartrender (void)
{
if (idle_id)
g_source_remove (idle_id);
idle_id = g_idle_add ((GSourceFunc) render, NULL);
}
static void
selecttexture (GtkWidget *widget,
gpointer data)
{
texture *t;
if (noupdate)
return;
t = currenttexture ();
if (!t)
return;
gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (widget), &t->type);
relabel ();
restartrender ();
}
static void
selecttype (GtkWidget *widget,
gpointer data)
{
texture *t;
if (noupdate)
return;
t = currenttexture ();
if (!t)
return;
gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (widget), &t->majtype);
relabel ();
restartrender ();
}
static void
getscales (GtkWidget *widget,
gpointer data)
{
gdouble f;
texture *t;
if (noupdate)
return;
t = currenttexture ();
if (!t)
return;
t->amount = gtk_adjustment_get_value (amountscale);
t->exp = gtk_adjustment_get_value (expscale);
f = gtk_adjustment_get_value (turbulencescale);
vset (&t->turbulence, f, f, f);
t->oscale = gtk_adjustment_get_value (scalescale);
t->scale.x = gtk_adjustment_get_value (scalexscale);
t->scale.y = gtk_adjustment_get_value (scaleyscale);
t->scale.z = gtk_adjustment_get_value (scalezscale);
t->rotate.x = gtk_adjustment_get_value (rotxscale);
t->rotate.y = gtk_adjustment_get_value (rotyscale);
t->rotate.z = gtk_adjustment_get_value (rotzscale);
t->translate.x = gtk_adjustment_get_value (posxscale);
t->translate.y = gtk_adjustment_get_value (posyscale);
t->translate.z = gtk_adjustment_get_value (poszscale);
restartrender ();
}
static void
color1_changed (GimpColorButton *button)
{
texture *t = currenttexture ();
if (t)
{
GimpRGB color;
gimp_color_button_get_color (button, &color);
t->color1.x = color.r;
t->color1.y = color.g;
t->color1.z = color.b;
t->color1.w = color.a;
restartrender ();
}
}
static void
color2_changed (GimpColorButton *button)
{
texture *t = currenttexture ();
if (t)
{
GimpRGB color;
gimp_color_button_get_color (button, &color);
t->color2.x = color.r;
t->color2.y = color.g;
t->color2.z = color.b;
t->color2.w = color.a;
restartrender ();
}
}
static void
drawcolor1 (GtkWidget *w)
{
static GtkWidget *lastw = NULL;
GimpRGB color;
texture *t = currenttexture ();
if (w)
lastw = w;
else
w = lastw;
if (!w)
return;
if (!t)
return;
gimp_rgba_set (&color,
t->color1.x, t->color1.y, t->color1.z, t->color1.w);
gimp_color_button_set_color (GIMP_COLOR_BUTTON (w), &color);
}
static void
drawcolor2 (GtkWidget *w)
{
static GtkWidget *lastw = NULL;
GimpRGB color;
texture *t = currenttexture ();
if (w)
lastw = w;
else
w = lastw;
if (!w)
return;
if (!t)
return;
gimp_rgba_set (&color,
t->color2.x, t->color2.y, t->color2.z, t->color2.w);
gimp_color_button_set_color (GIMP_COLOR_BUTTON (w), &color);
}
static gboolean do_run = FALSE;
static void
sphere_response (GtkWidget *widget,
gint response_id,
gpointer data)
{
switch (response_id)
{
case RESPONSE_RESET:
s.com.numtexture = 3;
setdefaults (&s.com.texture[0]);
setdefaults (&s.com.texture[1]);
setdefaults (&s.com.texture[2]);
s.com.texture[1].majtype = 2;
vset (&s.com.texture[1].color1, 1, 1, 1);
vset (&s.com.texture[1].translate, -15, -15, -15);
s.com.texture[2].majtype = 2;
vset (&s.com.texture[2].color1, 0, 0.4, 0.4);
vset (&s.com.texture[2].translate, 15, 15, -15);
gtk_list_store_clear (GTK_LIST_STORE (gtk_tree_view_get_model (texturelist)));
rebuildlist ();
break;
case GTK_RESPONSE_OK:
if (idle_id)
{
g_source_remove (idle_id);
idle_id = 0;
}
do_run = TRUE;
default:
gtk_widget_hide (widget);
gtk_main_quit ();
break;
}
}
static GtkWidget *
makewindow (void)
{
GtkListStore *store;
GtkTreeViewColumn *col;
GtkTreeSelection *selection;
GtkWidget *window;
GtkWidget *main_hbox;
GtkWidget *main_vbox;
GtkWidget *grid;
GtkWidget *frame;
GtkWidget *scrolled;
GtkWidget *hbox;
GtkWidget *vbox;
GtkWidget *button;
GtkWidget *list;
GimpRGB rgb = { 0, 0, 0, 0 };
window = gimp_dialog_new (_("Sphere Designer"), PLUG_IN_ROLE,
NULL, 0,
gimp_standard_help_func, PLUG_IN_PROC,
_("_Reset"), RESPONSE_RESET,
_("_Cancel"), GTK_RESPONSE_CANCEL,
_("_OK"), GTK_RESPONSE_OK,
NULL);
gimp_dialog_set_alternative_button_order (GTK_DIALOG (window),
RESPONSE_RESET,
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
gimp_window_set_transient (GTK_WINDOW (window));
g_signal_connect (window, "response",
G_CALLBACK (sphere_response),
NULL);
main_vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 12);
gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (window))),
main_vbox, TRUE, TRUE, 0);
gtk_widget_show (main_vbox);
main_hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 12);
gtk_box_pack_start (GTK_BOX (main_vbox), main_hbox, TRUE, TRUE, 0);
gtk_widget_show (main_hbox);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
gtk_box_pack_start (GTK_BOX (main_hbox), vbox, FALSE, FALSE, 0);
gtk_widget_show (vbox);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
drawarea = gtk_drawing_area_new ();
gtk_container_add (GTK_CONTAINER (frame), drawarea);
gtk_widget_set_size_request (drawarea, PREVIEWSIZE, PREVIEWSIZE);
gtk_widget_show (drawarea);
g_signal_connect (drawarea, "draw",
G_CALLBACK (draw), NULL);
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
gtk_box_set_homogeneous (GTK_BOX (hbox), TRUE);
gtk_box_pack_end (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
button = gtk_button_new_with_mnemonic (_("_Open"));
gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
gtk_widget_show (button);
g_signal_connect (button, "clicked",
G_CALLBACK (loadpreset),
window);
button = gtk_button_new_with_mnemonic (_("_Save"));
gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
gtk_widget_show (button);
g_signal_connect (button, "clicked",
G_CALLBACK (savepreset),
window);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6);
gtk_box_pack_end (GTK_BOX (main_hbox), vbox, TRUE, TRUE, 0);
gtk_widget_show (vbox);
scrolled = gtk_scrolled_window_new (NULL, NULL);
gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (scrolled),
GTK_SHADOW_IN);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled),
GTK_POLICY_NEVER,
GTK_POLICY_AUTOMATIC);
gtk_box_pack_start (GTK_BOX (vbox), scrolled, TRUE, TRUE, 0);
gtk_widget_show (scrolled);
store = gtk_list_store_new (NUM_COLUMNS, G_TYPE_STRING, G_TYPE_POINTER);
list = gtk_tree_view_new_with_model (GTK_TREE_MODEL (store));
g_object_unref (store);
texturelist = GTK_TREE_VIEW (list);
selection = gtk_tree_view_get_selection (texturelist);
gtk_tree_selection_set_mode (selection, GTK_SELECTION_BROWSE);
g_signal_connect (selection, "changed",
G_CALLBACK (selectitem),
NULL);
gtk_widget_set_size_request (list, -1, 150);
gtk_container_add (GTK_CONTAINER (scrolled), list);
gtk_widget_show (list);
col = gtk_tree_view_column_new_with_attributes (_("Layers"),
gtk_cell_renderer_text_new (),
"text", TYPE,
NULL);
gtk_tree_view_append_column (texturelist, col);
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
gtk_box_set_homogeneous (GTK_BOX (hbox), TRUE);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
button = gtk_button_new_with_mnemonic (_("_New"));
gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
g_signal_connect_swapped (button, "clicked",
G_CALLBACK (addtexture), NULL);
gtk_widget_show (button);
button = gtk_button_new_with_mnemonic (_("D_uplicate"));
gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
g_signal_connect_swapped (button, "clicked",
G_CALLBACK (duptexture), NULL);
gtk_widget_show (button);
button = gtk_button_new_with_mnemonic (_("_Delete"));
gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
g_signal_connect_swapped (button, "clicked",
G_CALLBACK (deltexture), NULL);
gtk_widget_show (button);
main_hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 12);
gtk_box_pack_start (GTK_BOX (main_vbox), main_hbox, FALSE, FALSE, 0);
gtk_widget_show (main_hbox);
frame = gimp_frame_new (_("Properties"));
gtk_box_pack_start (GTK_BOX (main_hbox), frame, TRUE, TRUE, 0);
gtk_widget_show (frame);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
gtk_container_add (GTK_CONTAINER (frame), vbox);
gtk_widget_show (vbox);
grid = gtk_grid_new ();
gtk_grid_set_column_spacing (GTK_GRID (grid), 2);
gtk_grid_set_row_spacing (GTK_GRID (grid), 6);
gtk_box_pack_start (GTK_BOX (vbox), grid, FALSE, FALSE, 0);
gtk_widget_show (grid);
typemenu = gimp_int_combo_box_new (_("Texture"), 0,
_("Bump"), 1,
_("Light"), 2,
NULL);
gimp_int_combo_box_connect (GIMP_INT_COMBO_BOX (typemenu), 0,
G_CALLBACK (selecttype),
NULL, NULL);
gimp_grid_attach_aligned (GTK_GRID (grid), 0, 0,
_("Type:"), 0.0, 0.5,
typemenu, 2);
texturemenu = g_object_new (GIMP_TYPE_INT_COMBO_BOX, NULL);
{
struct textures_t *t;
for (t = textures; t->s; t++)
gimp_int_combo_box_append (GIMP_INT_COMBO_BOX (texturemenu),
GIMP_INT_STORE_VALUE, t->n,
GIMP_INT_STORE_LABEL, gettext (t->s),
-1);
}
gimp_int_combo_box_connect (GIMP_INT_COMBO_BOX (texturemenu), 0,
G_CALLBACK (selecttexture),
NULL, NULL);
gimp_grid_attach_aligned (GTK_GRID (grid), 0, 1,
_("Texture:"), 0.0, 0.5,
texturemenu, 2);
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 12);
gimp_grid_attach_aligned (GTK_GRID (grid), 0, 2,
_("Colors:"), 0.0, 0.5,
hbox, 2);
button = gimp_color_button_new (_("Color Selection Dialog"),
COLORBUTTONWIDTH, COLORBUTTONHEIGHT, &rgb,
GIMP_COLOR_AREA_FLAT);
gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
gtk_widget_show (button);
drawcolor1 (button);
g_signal_connect (button, "color-changed",
G_CALLBACK (color1_changed),
NULL);
button = gimp_color_button_new (_("Color Selection Dialog"),
COLORBUTTONWIDTH, COLORBUTTONHEIGHT, &rgb,
GIMP_COLOR_AREA_FLAT);
gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
gtk_widget_show (button);
drawcolor2 (button);
g_signal_connect (button, "color-changed",
G_CALLBACK (color2_changed),
NULL);
scalescale = gimp_scale_entry_new (GTK_GRID (grid), 0, 3, _("Scale:"),
100, -1, 1.0, 0.0, 10.0, 0.1, 1.0, 1,
TRUE, 0.0, 0.0, NULL, NULL);
g_signal_connect (scalescale, "value-changed",
G_CALLBACK (getscales),
NULL);
turbulencescale = gimp_scale_entry_new (GTK_GRID (grid), 0, 4,
_("Turbulence:"),
100, -1, 1.0, 0.0, 10.0, 0.1, 1.0, 1,
TRUE, 0.0, 0.0, NULL, NULL);
g_signal_connect (turbulencescale, "value-changed",
G_CALLBACK (getscales),
NULL);
amountscale = gimp_scale_entry_new (GTK_GRID (grid), 0, 5, _("Amount:"),
100, -1, 1.0, 0.0, 1.0, 0.01, 0.1, 2,
TRUE, 0.0, 0.0, NULL, NULL);
g_signal_connect (amountscale, "value-changed",
G_CALLBACK (getscales),
NULL);
expscale = gimp_scale_entry_new (GTK_GRID (grid), 0, 6, _("Exp.:"),
100, -1, 1.0, 0.0, 1.0, 0.01, 0.1, 2,
TRUE, 0.0, 0.0, NULL, NULL);
g_signal_connect (expscale, "value-changed",
G_CALLBACK (getscales),
NULL);
frame = gimp_frame_new (_("Transformations"));
gtk_box_pack_start (GTK_BOX (main_hbox), frame, TRUE, TRUE, 0);
gtk_widget_show (frame);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
gtk_container_add (GTK_CONTAINER (frame), vbox);
gtk_widget_show (vbox);
grid = gtk_grid_new ();
gtk_grid_set_column_spacing (GTK_GRID (grid), 2);
gtk_grid_set_row_spacing (GTK_GRID (grid), 6);
gtk_box_pack_start (GTK_BOX (vbox), grid, FALSE, FALSE, 0);
gtk_widget_show (grid);
scalexscale = gimp_scale_entry_new (GTK_GRID (grid), 0, 0, _("Scale X:"),
100, -1, 1.0, 0.0, 10.0, 0.1, 1.0, 2,
TRUE, 0.0, 0.0, NULL, NULL);
g_signal_connect (scalexscale, "value-changed",
G_CALLBACK (getscales),
NULL);
scaleyscale = gimp_scale_entry_new (GTK_GRID (grid), 0, 1, _("Scale Y:"),
100, -1, 1.0, 0.0, 10.0, 0.1, 1.0, 2,
TRUE, 0.0, 0.0, NULL, NULL);
g_signal_connect (scaleyscale, "value-changed",
G_CALLBACK (getscales),
NULL);
scalezscale = gimp_scale_entry_new (GTK_GRID (grid), 0, 2, _("Scale Z:"),
100, -1, 1.0, 0.0, 10.0, 0.1, 1.0, 2,
TRUE, 0.0, 0.0, NULL, NULL);
gtk_widget_set_margin_bottom (gtk_grid_get_child_at (GTK_GRID (grid), 0, 2), 6);
gtk_widget_set_margin_bottom (gtk_grid_get_child_at (GTK_GRID (grid), 1, 2), 6);
gtk_widget_set_margin_bottom (gtk_grid_get_child_at (GTK_GRID (grid), 2, 2), 6);
g_signal_connect (scalezscale, "value-changed",
G_CALLBACK (getscales),
NULL);
rotxscale = gimp_scale_entry_new (GTK_GRID (grid), 0, 3, _("Rotate X:"),
100, -1, 0.0, 0.0, 360.0, 1.0, 10.0, 1,
TRUE, 0.0, 0.0, NULL, NULL);
g_signal_connect (rotxscale, "value-changed",
G_CALLBACK (getscales),
NULL);
rotyscale = gimp_scale_entry_new (GTK_GRID (grid), 0, 4, _("Rotate Y:"),
100, -1, 0.0, 0.0, 360.0, 1.0, 10.0, 1,
TRUE, 0.0, 0.0, NULL, NULL);
g_signal_connect (rotyscale, "value-changed",
G_CALLBACK (getscales),
NULL);
rotzscale = gimp_scale_entry_new (GTK_GRID (grid), 0, 5, _("Rotate Z:"),
100, -1, 0.0, 0.0, 360.0, 1.0, 10.0, 1,
TRUE, 0.0, 0.0, NULL, NULL);
gtk_widget_set_margin_bottom (gtk_grid_get_child_at (GTK_GRID (grid), 0, 5), 6);
gtk_widget_set_margin_bottom (gtk_grid_get_child_at (GTK_GRID (grid), 1, 5), 6);
gtk_widget_set_margin_bottom (gtk_grid_get_child_at (GTK_GRID (grid), 2, 5), 6);
g_signal_connect (rotzscale, "value-changed",
G_CALLBACK (getscales),
NULL);
posxscale = gimp_scale_entry_new (GTK_GRID (grid), 0, 6, _("Position X:"),
100, -1, 0.0, -20.0, 20.0, 0.1, 1.0, 1,
TRUE, 0.0, 0.0, NULL, NULL);
g_signal_connect (posxscale, "value-changed",
G_CALLBACK (getscales),
NULL);
posyscale = gimp_scale_entry_new (GTK_GRID (grid), 0, 7, _("Position Y:"),
100, -1, 0.0, -20.0, 20.0, 0.1, 1.0, 1,
TRUE, 0.0, 0.0, NULL, NULL);
g_signal_connect (posyscale, "value-changed",
G_CALLBACK (getscales),
NULL);
poszscale = gimp_scale_entry_new (GTK_GRID (grid), 0, 8, _("Position Z:"),
100, -1, 0.0, -20.0, 20.0, 0.1, 1.0, 1,
TRUE, 0.0, 0.0, NULL, NULL);
g_signal_connect (poszscale, "value-changed",
G_CALLBACK (getscales),
NULL);
gtk_widget_show (window);
return window;
}
static guchar
pixelval (gdouble v)
{
v += 0.5;
if (v < 0.0)
return 0;
if (v > 255.0)
return 255;
return v;
}
static gboolean
render (void)
{
GimpVector4 col;
guchar *dest_row;
ray r;
gint x, y, p;
gint tx = PREVIEWSIZE;
gint ty = PREVIEWSIZE;
gint bpp = 4;
idle_id = 0;
initworld ();
r.v1.z = -10.0;
r.v2.z = 0.0;
if (world.obj[0].com.numtexture > 0)
{
cairo_surface_flush (buffer);
for (y = 0; y < ty; y++)
{
dest_row = img + y * img_stride;
for (x = 0; x < tx; x++)
{
gint g, gridsize = 16;
g = ((x / gridsize + y / gridsize) % 2) * 60 + 100;
r.v1.x = r.v2.x = 8.5 * (x / (float) (tx - 1) - 0.5);
r.v1.y = r.v2.y = 8.5 * (y / (float) (ty - 1) - 0.5);
p = x * bpp;
traceray (&r, &col, 10, 1.0);
if (col.w < 0.0)
col.w = 0.0;
else if (col.w > 1.0)
col.w = 1.0;
GIMP_CAIRO_RGB24_SET_PIXEL ((dest_row + p),
pixelval (255 * col.x) * col.w + g * (1.0 - col.w),
pixelval (255 * col.y) * col.w + g * (1.0 - col.w),
pixelval (255 * col.z) * col.w + g * (1.0 - col.w));
}
}
cairo_surface_mark_dirty (buffer);
}
gtk_widget_queue_draw (drawarea);
return FALSE;
}
static void
realrender (GimpDrawable *drawable)
{
GeglBuffer *src_buffer;
GeglBuffer *dest_buffer;
const Babl *format;
gint x, y;
ray r;
GimpVector4 rcol;
gint width, height;
gint x1, y1;
guchar *dest;
gint bpp;
guchar *buffer, *ibuffer;
initworld ();
r.v1.z = -10.0;
r.v2.z = 0.0;
if (! gimp_drawable_mask_intersect (drawable,
&x1, &y1, &width, &height))
return;
src_buffer = gimp_drawable_get_buffer (drawable);
dest_buffer = gimp_drawable_get_shadow_buffer (drawable);
if (gimp_drawable_is_rgb (drawable))
{
if (gimp_drawable_has_alpha (drawable))
format = babl_format ("R'G'B'A u8");
else
format = babl_format ("R'G'B' u8");
}
else
{
if (gimp_drawable_has_alpha (drawable))
format = babl_format ("Y'A u8");
else
format = babl_format ("Y' u8");
}
bpp = babl_format_get_bytes_per_pixel (format);
buffer = g_malloc (width * 4);
ibuffer = g_malloc (width * 4);
gimp_progress_init (_("Rendering sphere"));
for (y = 0; y < height; y++)
{
dest = buffer;
for (x = 0; x < width; x++)
{
r.v1.x = r.v2.x = 8.1 * (x / (float) (width - 1) - 0.5);
r.v1.y = r.v2.y = 8.1 * (y / (float) (height - 1) - 0.5);
traceray (&r, &rcol, 10, 1.0);
dest[0] = pixelval (255 * rcol.x);
dest[1] = pixelval (255 * rcol.y);
dest[2] = pixelval (255 * rcol.z);
dest[3] = pixelval (255 * rcol.w);
dest += 4;
}
gegl_buffer_get (src_buffer, GEGL_RECTANGLE (x1, y1 + y, width, 1), 1.0,
format, ibuffer,
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
for (x = 0; x < width; x++)
{
gint k, dx = x * 4, sx = x * bpp;
gfloat a = buffer[dx + 3] / 255.0;
for (k = 0; k < bpp; k++)
{
ibuffer[sx + k] =
buffer[dx + k] * a + ibuffer[sx + k] * (1.0 - a);
}
}
gegl_buffer_set (dest_buffer, GEGL_RECTANGLE (x1, y1 + y, width, 1), 0,
format, ibuffer,
GEGL_AUTO_ROWSTRIDE);
gimp_progress_update ((gdouble) y / (gdouble) height);
}
gimp_progress_update (1.0);
g_free (buffer);
g_free (ibuffer);
g_object_unref (src_buffer);
g_object_unref (dest_buffer);
gimp_drawable_merge_shadow (drawable, TRUE);
gimp_drawable_update (drawable, x1, y1, width, height);
}
static gboolean
sphere_main (GimpDrawable *drawable)
{
gimp_ui_init (PLUG_IN_BINARY);
img_stride = cairo_format_stride_for_width (CAIRO_FORMAT_RGB24, PREVIEWSIZE);
img = g_malloc0 (img_stride * PREVIEWSIZE);
buffer = cairo_image_surface_create_for_data (img, CAIRO_FORMAT_RGB24,
PREVIEWSIZE,
PREVIEWSIZE,
img_stride);
makewindow ();
if (s.com.numtexture == 0)
{
/* Setup and use default list */
sphere_response (NULL, RESPONSE_RESET, NULL);
}
else
{
/* Reuse the list from a previous invocation */
rebuildlist ();
}
gtk_main ();
cairo_surface_destroy (buffer);
g_free (img);
return do_run;
}
static GimpValueArray *
designer_run (GimpProcedure *procedure,
GimpRunMode run_mode,
GimpImage *image,
GimpDrawable *drawable,
const GimpValueArray *args,
gpointer run_data)
{
gint x, y, w, h;
INIT_I18N ();
gegl_init (NULL, NULL);
if (! gimp_drawable_mask_intersect (drawable, &x, &y, &w, &h))
{
g_message (_("Region selected for plug-in is empty"));
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_SUCCESS,
NULL);
}
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
s.com.numtexture = 0;
gimp_get_data (PLUG_IN_PROC, &s);
if (! sphere_main (drawable))
{
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_CANCEL,
NULL);
}
break;
case GIMP_RUN_WITH_LAST_VALS:
s.com.numtexture = 0;
gimp_get_data (PLUG_IN_PROC, &s);
if (s.com.numtexture == 0)
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_EXECUTION_ERROR,
NULL);
break;
case GIMP_RUN_NONINTERACTIVE:
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_EXECUTION_ERROR,
NULL);
}
gimp_set_data (PLUG_IN_PROC, &s, sizeof (s));
realrender (drawable);
gimp_displays_flush ();
return gimp_procedure_new_return_values (procedure, GIMP_PDB_SUCCESS, NULL);
}
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