diff options
| -rw-r--r-- | progs/demos/isosurf.c | 224 |
1 files changed, 154 insertions, 70 deletions
diff --git a/progs/demos/isosurf.c b/progs/demos/isosurf.c index 393197f66de..8ab73e917fe 100644 --- a/progs/demos/isosurf.c +++ b/progs/demos/isosurf.c @@ -1,15 +1,31 @@ -/* $Id: isosurf.c,v 1.1 1999/08/19 00:55:40 jtg Exp $ */ +/* $Id: isosurf.c,v 1.2 1999/09/03 14:56:40 keithw Exp $ */ /* - * Display an isosurface of 3-D wind speed volume. Use arrow keys to - * rotate, S toggles smooth shading, L toggles lighting + * Display an isosurface of 3-D wind speed volume. + * * Brian Paul This file in public domain. */ + +/* Keys: + * ===== + * + * - Arrow keys to rotate + * - 's' toggles smooth shading + * - 'l' toggles lighting + * - 'f' toggles fog + * - 'I' and 'i' zoom in and out + * - 'c' toggles a user clip plane + * - 'm' toggles colorful materials in GL_TRIANGLES modes. + * - '+' and '-' move the user clip plane + * + * Other options are available via the popup menu. + */ + /* * $Log: isosurf.c,v $ - * Revision 1.1 1999/08/19 00:55:40 jtg - * Initial revision + * Revision 1.2 1999/09/03 14:56:40 keithw + * Fog, displaylist and zoom operations * * Revision 3.4 1999/04/24 01:10:47 keithw * clip planes, materials @@ -44,11 +60,11 @@ #define NO_REFLECT 0x20 #define POINT_FILTER 0x40 #define LINEAR_FILTER 0x80 -#define IMMEDIATE 0x100 +#define GLVERTEX 0x100 #define DRAW_ARRAYS 0x200 /* or draw_elts, if compiled */ #define ARRAY_ELT 0x400 #define COMPILED 0x800 -#define NOT_COMPILED 0x1000 +#define IMMEDIATE 0x1000 #define SHADE_SMOOTH 0x2000 #define SHADE_FLAT 0x4000 #define TRIANGLES 0x8000 @@ -57,18 +73,22 @@ #define NO_USER_CLIP 0x40000 #define MATERIALS 0x80000 #define NO_MATERIALS 0x100000 +#define FOG 0x200000 +#define NO_FOG 0x400000 #define QUIT 0x800000 +#define DISPLAYLIST 0x1000000 #define LIGHT_MASK (LIT|UNLIT) #define TEXTURE_MASK (TEXTURE|NO_TEXTURE) #define REFLECT_MASK (REFLECT|NO_REFLECT) #define FILTER_MASK (POINT_FILTER|LINEAR_FILTER) -#define RENDER_STYLE_MASK (IMMEDIATE|DRAW_ARRAYS|ARRAY_ELT) -#define COMPILED_MASK (COMPILED|NOT_COMPILED) +#define RENDER_STYLE_MASK (GLVERTEX|DRAW_ARRAYS|ARRAY_ELT) +#define COMPILED_MASK (COMPILED|IMMEDIATE|DISPLAYLIST) #define MATERIAL_MASK (MATERIALS|NO_MATERIALS) #define PRIMITIVE_MASK (TRIANGLES|STRIPS) #define CLIP_MASK (USER_CLIP|NO_USER_CLIP) #define SHADE_MASK (SHADE_SMOOTH|SHADE_FLAT) +#define FOG_MASK (FOG|NO_FOG) #define MAXVERTS 10000 static float data[MAXVERTS][6]; @@ -80,10 +100,11 @@ static GLint numverts, num_tri_verts, numuniq; static GLfloat xrot; static GLfloat yrot; +static GLfloat dist = -6; static GLint state, allowed = ~0; static GLboolean doubleBuffer = GL_TRUE; static GLdouble plane[4] = {1.0, 0.0, -1.0, 0.0}; - +static GLuint surf1; static void read_surface( char *filename ) { @@ -290,11 +311,11 @@ static void make_tri_indices( void ) #define MIN(x,y) (x < y) ? x : y -static void draw_surface( void ) +static void draw_surface( int with_state ) { GLuint i, j; - switch (state & (COMPILED_MASK|RENDER_STYLE_MASK|PRIMITIVE_MASK)) { + switch (with_state & (COMPILED_MASK|RENDER_STYLE_MASK|PRIMITIVE_MASK)) { #ifdef GL_EXT_vertex_array case (COMPILED|DRAW_ARRAYS|STRIPS): @@ -310,8 +331,8 @@ static void draw_surface( void ) break; case (COMPILED|DRAW_ARRAYS|TRIANGLES): - case (NOT_COMPILED|DRAW_ARRAYS|TRIANGLES): - if (state & MATERIALS) { + case (IMMEDIATE|DRAW_ARRAYS|TRIANGLES): + if (with_state & MATERIALS) { for (j = i = 0 ; i < num_tri_verts ; i += 600, j++) { GLuint nr = MIN(num_tri_verts-i, 600); glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, col[j]); @@ -327,22 +348,22 @@ static void draw_surface( void ) /* Uses the original arrays (including duplicate elements): */ - case (NOT_COMPILED|DRAW_ARRAYS|STRIPS): + case (IMMEDIATE|DRAW_ARRAYS|STRIPS): glDrawArraysEXT( GL_TRIANGLE_STRIP, 0, numverts ); break; /* Uses the original arrays (including duplicate elements): */ - case (NOT_COMPILED|ARRAY_ELT|STRIPS): + case (IMMEDIATE|ARRAY_ELT|STRIPS): glBegin( GL_TRIANGLE_STRIP ); for (i = 0 ; i < numverts ; i++) glArrayElement( i ); glEnd(); break; - case (NOT_COMPILED|ARRAY_ELT|TRIANGLES): + case (IMMEDIATE|ARRAY_ELT|TRIANGLES): case (COMPILED|ARRAY_ELT|TRIANGLES): - if (state & MATERIALS) { + if (with_state & MATERIALS) { for (j = i = 0 ; i < num_tri_verts ; i += 600, j++) { GLuint nr = MIN(num_tri_verts-i, 600); GLuint k; @@ -357,12 +378,13 @@ static void draw_surface( void ) glBegin( GL_TRIANGLES ); for (i = 0 ; i < num_tri_verts ; i++) glArrayElement( tri_indices[i] ); + glEnd(); } break; - case (NOT_COMPILED|IMMEDIATE|TRIANGLES): - if (state & MATERIALS) { + case (IMMEDIATE|GLVERTEX|TRIANGLES): + if (with_state & MATERIALS) { for (j = i = 0 ; i < num_tri_verts ; i += 600, j++) { GLuint nr = MIN(num_tri_verts-i, 600); GLuint k; @@ -385,6 +407,13 @@ static void draw_surface( void ) } break; + case (DISPLAYLIST|GLVERTEX|STRIPS): + if (!surf1) + surf1 = BuildList( GL_COMPILE_AND_EXECUTE ); + else + glCallList(surf1); + break; + #endif /* Uses the original arrays (including duplicate elements): @@ -404,18 +433,27 @@ static void draw_surface( void ) static void Display(void) { glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); - draw_surface(); + draw_surface( state ); glFlush(); if (doubleBuffer) glutSwapBuffers(); } +int BuildList( int mode ) +{ + int rv = glGenLists(1); + glNewList(rv, mode ); + draw_surface( IMMEDIATE|GLVERTEX|STRIPS ); + glEndList(); + return rv; +} + /* KW: only do this when necessary, so CVA can re-use results. */ static void set_matrix( void ) { glMatrixMode(GL_MODELVIEW); glLoadIdentity(); - glTranslatef( 0.0, 0.0, -6.0 ); + glTranslatef( 0.0, 0.0, dist ); glRotatef( yrot, 0.0, 1.0, 0.0 ); glRotatef( xrot, 1.0, 0.0, 0.0 ); } @@ -548,10 +586,23 @@ static void ModeMenu(int m) } } + if (CHANGED(state, m, FOG_MASK)) { + if (m & FOG) + { + glEnable(GL_FOG); + printf("FOG enable\n"); + } + else + { + glDisable(GL_FOG); + printf("FOG disable\n"); + } + } + #ifdef GL_EXT_vertex_array if (CHANGED(state, m, (COMPILED_MASK|RENDER_STYLE_MASK|PRIMITIVE_MASK))) { - if ((m & (COMPILED_MASK|PRIMITIVE_MASK)) == (NOT_COMPILED|STRIPS)) + if ((m & (COMPILED_MASK|PRIMITIVE_MASK)) == (IMMEDIATE|STRIPS)) { glVertexPointerEXT( 3, GL_FLOAT, sizeof(data[0]), numverts, data ); glNormalPointerEXT( GL_FLOAT, sizeof(data[0]), numverts, &data[0][3]); @@ -588,6 +639,8 @@ static void ModeMenu(int m) static void Init(void) { + GLfloat fogColor[4] = {0.5,1.0,0.5,1.0}; + glClearColor(0.0, 0.0, 0.0, 0.0); glEnable( GL_DEPTH_TEST ); glEnable( GL_VERTEX_ARRAY_EXT ); @@ -616,20 +669,30 @@ static void Init(void) exit(1); } + /* Green fog is easy to see */ + glFogi(GL_FOG_MODE,GL_EXP2); + glFogfv(GL_FOG_COLOR,fogColor); + glFogf(GL_FOG_DENSITY,0.15); + glHint(GL_FOG_HINT,GL_DONT_CARE); + + if (allowed & COMPILED) { compactify_arrays(); make_tri_indices(); } + surf1 = BuildList( GL_COMPILE ); + ModeMenu(SHADE_SMOOTH| LIT| NO_TEXTURE| NO_REFLECT| POINT_FILTER| - NOT_COMPILED| + IMMEDIATE| NO_USER_CLIP| NO_MATERIALS| - IMMEDIATE); + NO_FOG| + GLVERTEX); } @@ -644,44 +707,57 @@ static void Reshape(int width, int height) static void Key( unsigned char key, int x, int y ) { switch (key) { - case 27: - exit(0); - case 's': - ModeMenu((state ^ SHADE_MASK) & SHADE_MASK); - break; - case 'l': - ModeMenu((state ^ LIGHT_MASK) & LIGHT_MASK); - break; - case 'm': - ModeMenu((state ^ MATERIAL_MASK) & MATERIAL_MASK); - break; - case 'c': - ModeMenu((state ^ CLIP_MASK) & CLIP_MASK); - break; - case 'b': - Benchmark(5.0, 0); - break; - case 'B': - Benchmark(0, 5.0); - break; - case '-': - case '_': - plane[3] += 2.0; - glMatrixMode(GL_MODELVIEW); - glLoadIdentity(); - glClipPlane(GL_CLIP_PLANE0, plane); - set_matrix(); - glutPostRedisplay(); - break; - case '+': - case '=': - plane[3] -= 2.0; - glMatrixMode(GL_MODELVIEW); - glLoadIdentity(); - glClipPlane(GL_CLIP_PLANE0, plane); - set_matrix(); - glutPostRedisplay(); - break; + case 27: + exit(0); + case 'f': + ModeMenu((state ^ FOG_MASK) & FOG_MASK); + break; + case 's': + ModeMenu((state ^ SHADE_MASK) & SHADE_MASK); + break; + case 'l': + ModeMenu((state ^ LIGHT_MASK) & LIGHT_MASK); + break; + case 'm': + ModeMenu((state ^ MATERIAL_MASK) & MATERIAL_MASK); + break; + case 'c': + ModeMenu((state ^ CLIP_MASK) & CLIP_MASK); + break; + case 'b': + Benchmark(5.0, 0); + break; + case 'B': + Benchmark(0, 5.0); + break; + case 'i': + dist += .25; + set_matrix(); + glutPostRedisplay(); + break; + case 'I': + dist -= .25; + set_matrix(); + glutPostRedisplay(); + break; + case '-': + case '_': + plane[3] += 2.0; + glMatrixMode(GL_MODELVIEW); + glLoadIdentity(); + glClipPlane(GL_CLIP_PLANE0, plane); + set_matrix(); + glutPostRedisplay(); + break; + case '+': + case '=': + plane[3] -= 2.0; + glMatrixMode(GL_MODELVIEW); + glLoadIdentity(); + glClipPlane(GL_CLIP_PLANE0, plane); + set_matrix(); + glutPostRedisplay(); + break; } } @@ -782,21 +858,27 @@ int main(int argc, char **argv) glutAddMenuEntry("Smooth", SHADE_SMOOTH); glutAddMenuEntry("Flat", SHADE_FLAT); glutAddMenuEntry("", 0); + glutAddMenuEntry("Fog", FOG); + glutAddMenuEntry("No Fog", NO_FOG); + glutAddMenuEntry("", 0); glutAddMenuEntry("Point Filtered", POINT_FILTER); glutAddMenuEntry("Linear Filtered", LINEAR_FILTER); glutAddMenuEntry("", 0); - glutAddMenuEntry("Immediate (STRIPS)", NOT_COMPILED|IMMEDIATE|STRIPS); - glutAddMenuEntry("Immediate (TRIANGLES)", NOT_COMPILED|IMMEDIATE|TRIANGLES); + glutAddMenuEntry("glVertex (STRIPS)", IMMEDIATE|GLVERTEX|STRIPS); + glutAddMenuEntry("glVertex (TRIANGLES)", IMMEDIATE|GLVERTEX|TRIANGLES); + glutAddMenuEntry("", 0); + glutAddMenuEntry("glVertex display list (STRIPS)", + DISPLAYLIST|GLVERTEX|STRIPS); glutAddMenuEntry("", 0); if (allowed & DRAW_ARRAYS) { glutAddMenuEntry("DrawArrays (STRIPS)", - NOT_COMPILED|DRAW_ARRAYS|STRIPS); + IMMEDIATE|DRAW_ARRAYS|STRIPS); glutAddMenuEntry("ArrayElement (STRIPS)", - NOT_COMPILED|ARRAY_ELT|STRIPS); + IMMEDIATE|ARRAY_ELT|STRIPS); glutAddMenuEntry("DrawElements (TRIANGLES)", - NOT_COMPILED|DRAW_ARRAYS|TRIANGLES); + IMMEDIATE|DRAW_ARRAYS|TRIANGLES); glutAddMenuEntry("ArrayElement (TRIANGLES)", - NOT_COMPILED|ARRAY_ELT|TRIANGLES); + IMMEDIATE|ARRAY_ELT|TRIANGLES); glutAddMenuEntry("", 0); } @@ -805,7 +887,9 @@ int main(int argc, char **argv) COMPILED|DRAW_ARRAYS|TRIANGLES); glutAddMenuEntry("Compiled DrawElements (STRIPS)", COMPILED|DRAW_ARRAYS|STRIPS); - glutAddMenuEntry("Compiled ArrayElement", + glutAddMenuEntry("Compiled ArrayElement (TRIANGLES)", + COMPILED|ARRAY_ELT|TRIANGLES); + glutAddMenuEntry("Compiled ArrayElement (STRIPS)", COMPILED|ARRAY_ELT|STRIPS); glutAddMenuEntry("", 0); } |