diff options
author | Eric Anholt <eric@anholt.net> | 2010-05-21 09:32:38 -0700 |
---|---|---|
committer | Eric Anholt <eric@anholt.net> | 2010-05-21 12:20:39 -0700 |
commit | 68fc4b415e322f6744299e39864fbc377c6eff74 (patch) | |
tree | 4bafffd8b0105174f3c5c0ae327a005be9145990 /progs/demos/arbfplight.c | |
parent | e4f4489e3fc0b36d72821b55794fb843b2b7fa5f (diff) | |
download | external_mesa3d-68fc4b415e322f6744299e39864fbc377c6eff74.zip external_mesa3d-68fc4b415e322f6744299e39864fbc377c6eff74.tar.gz external_mesa3d-68fc4b415e322f6744299e39864fbc377c6eff74.tar.bz2 |
Remove demos that have moved to git+ssh://git.freedesktop.org/git/mesa/demos.
The remaining programs are ones I've had difficulty finding a build
environment for to make the build system or are unit tests that should
probably live next to their code instead. Hopefully people can bring
over the build for remaining pieces they care about.
Diffstat (limited to 'progs/demos/arbfplight.c')
-rw-r--r-- | progs/demos/arbfplight.c | 404 |
1 files changed, 0 insertions, 404 deletions
diff --git a/progs/demos/arbfplight.c b/progs/demos/arbfplight.c deleted file mode 100644 index 861b3b7..0000000 --- a/progs/demos/arbfplight.c +++ /dev/null @@ -1,404 +0,0 @@ -/* - * Use GL_ARB_fragment_program and GL_ARB_vertex_program to implement - * simple per-pixel lighting. - * - * Brian Paul - * 17 April 2003 - */ - -#include <assert.h> -#include <string.h> -#include <stdio.h> -#include <stdlib.h> -#include <math.h> -#include <GL/glut.h> - - -static GLfloat Diffuse[4] = { 0.5, 0.5, 1.0, 1.0 }; -static GLfloat Specular[4] = { 0.8, 0.8, 0.8, 1.0 }; -static GLfloat LightPos[4] = { 0.0, 10.0, 20.0, 1.0 }; -static GLfloat Delta = 1.0; - -static GLuint FragProg; -static GLuint VertProg; -static GLboolean Anim = GL_TRUE; -static GLboolean Wire = GL_FALSE; -static GLboolean PixelLight = GL_TRUE; -static GLint Win; - -static GLint T0 = 0; -static GLint Frames = 0; - -static GLfloat Xrot = 0, Yrot = 0; - -static PFNGLPROGRAMLOCALPARAMETER4FVARBPROC glProgramLocalParameter4fvARB_func; -static PFNGLPROGRAMLOCALPARAMETER4DARBPROC glProgramLocalParameter4dARB_func; -static PFNGLGETPROGRAMLOCALPARAMETERDVARBPROC glGetProgramLocalParameterdvARB_func; -static PFNGLGENPROGRAMSARBPROC glGenProgramsARB_func; -static PFNGLPROGRAMSTRINGARBPROC glProgramStringARB_func; -static PFNGLBINDPROGRAMARBPROC glBindProgramARB_func; -static PFNGLISPROGRAMARBPROC glIsProgramARB_func; -static PFNGLDELETEPROGRAMSARBPROC glDeleteProgramsARB_func; - -/* These must match the indexes used in the fragment program */ -#define LIGHTPOS 3 - -/* Set to one to test ARB_fog_linear program option */ -#define DO_FRAGMENT_FOG 0 - -static void normalize (GLfloat *dst, const GLfloat *src) -{ - GLfloat len = sqrt (src[0] * src[0] + src[1] * src[1] + src[2] * src[2]); - dst[0] = src[0] / len; - dst[1] = src[1] / len; - dst[2] = src[2] / len; -} - -static void Redisplay( void ) -{ - glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); - - if (PixelLight) { - GLfloat pos[4]; - - normalize( pos, LightPos ); - pos[3] = LightPos[3]; - glProgramLocalParameter4fvARB_func(GL_FRAGMENT_PROGRAM_ARB, - LIGHTPOS, pos); - glEnable(GL_FRAGMENT_PROGRAM_ARB); - glEnable(GL_VERTEX_PROGRAM_ARB); - glDisable(GL_LIGHTING); - } - else { - glLightfv(GL_LIGHT0, GL_POSITION, LightPos); - glDisable(GL_FRAGMENT_PROGRAM_ARB); - glDisable(GL_VERTEX_PROGRAM_ARB); - glEnable(GL_LIGHTING); - } - - glPushMatrix(); - glRotatef(Xrot, 1, 0, 0); - glRotatef(Yrot, 0, 1, 0); - glutSolidSphere(2.0, 10, 5); - glPopMatrix(); - - glutSwapBuffers(); - - Frames++; - - if (Anim) { - GLint t = glutGet(GLUT_ELAPSED_TIME); - if (t - T0 >= 5000) { - GLfloat seconds = (t - T0) / 1000.0; - GLfloat fps = Frames / seconds; - printf("%d frames in %6.3f seconds = %6.3f FPS\n", Frames, seconds, fps); - fflush(stdout); - T0 = t; - Frames = 0; - } - } -} - - -static void Idle(void) -{ - LightPos[0] += Delta; - if (LightPos[0] > 25.0) - Delta = -1.0; - else if (LightPos[0] <- 25.0) - Delta = 1.0; - glutPostRedisplay(); -} - - -static void Reshape( int width, int height ) -{ - glViewport( 0, 0, width, height ); - glMatrixMode( GL_PROJECTION ); - glLoadIdentity(); - glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 25.0 ); - glMatrixMode( GL_MODELVIEW ); - glLoadIdentity(); - glTranslatef( 0.0, 0.0, -15.0 ); -} - - -static void Key( unsigned char key, int x, int y ) -{ - (void) x; - (void) y; - switch (key) { - case ' ': - case 'a': - Anim = !Anim; - if (Anim) - glutIdleFunc(Idle); - else - glutIdleFunc(NULL); - break; - case 'x': - LightPos[0] -= 1.0; - break; - case 'X': - LightPos[0] += 1.0; - break; - case 'w': - Wire = !Wire; - if (Wire) - glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); - else - glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); - break; - case 'p': - PixelLight = !PixelLight; - if (PixelLight) { - printf("Per-pixel lighting\n"); - } - else { - printf("Conventional lighting\n"); - } - break; - case 27: - glDeleteProgramsARB_func(1, &VertProg); - glDeleteProgramsARB_func(1, &FragProg); - glutDestroyWindow(Win); - exit(0); - break; - } - glutPostRedisplay(); -} - -static void SpecialKey( int key, int x, int y ) -{ - const GLfloat step = 3.0; - (void) x; - (void) y; - switch (key) { - case GLUT_KEY_UP: - Xrot -= step; - break; - case GLUT_KEY_DOWN: - Xrot += step; - break; - case GLUT_KEY_LEFT: - Yrot -= step; - break; - case GLUT_KEY_RIGHT: - Yrot += step; - break; - } - glutPostRedisplay(); -} - - -/* A helper for finding errors in program strings */ -static int FindLine( const char *program, int position ) -{ - int i, line = 1; - for (i = 0; i < position; i++) { - if (program[i] == '\n') - line++; - } - return line; -} - - -static void Init( void ) -{ - GLint errorPos; - - /* Yes, this could be expressed more efficiently */ - static const char *fragProgramText = - "!!ARBfp1.0\n" -#if DO_FRAGMENT_FOG - "OPTION ARB_fog_linear; \n" -#endif - "PARAM Diffuse = state.material.diffuse; \n" - "PARAM Specular = state.material.specular; \n" - "PARAM LightPos = program.local[3]; \n" - "TEMP normal, len; \n" - "TEMP dotProd, specAtten; \n" - "TEMP diffuseColor, specularColor; \n" - - "# Compute normalized normal \n" - "DP3 len.x, fragment.texcoord[0], fragment.texcoord[0]; \n" - "RSQ len.y, len.x; \n" - "MUL normal.xyz, fragment.texcoord[0], len.y; \n" - - "# Compute dot product of light direction and normal vector\n" - "DP3_SAT dotProd.x, LightPos, normal; # limited to [0,1]\n" - - "MUL diffuseColor.xyz, Diffuse, dotProd.x; # diffuse attenuation\n" - - "POW specAtten.x, dotProd.x, {20.0}.x; # specular exponent\n" - - "MUL specularColor.xyz, Specular, specAtten.x; # specular attenuation\n" - - "MOV result.color.w, Diffuse; \n" -#if DO_FRAGMENT_FOG - "# need to clamp color to [0,1] before fogging \n" - "ADD_SAT result.color.xyz, diffuseColor, specularColor; # add colors\n" -#else - "# clamping will be done after program's finished \n" - "ADD result.color.xyz, diffuseColor, specularColor; # add colors\n" -#endif - "END \n" - ; - - static const char *vertProgramText = - "!!ARBvp1.0\n" - "ATTRIB pos = vertex.position; \n" - "ATTRIB norm = vertex.normal; \n" - "PARAM modelview[4] = { state.matrix.modelview }; \n" - "PARAM modelviewProj[4] = { state.matrix.mvp }; \n" - "PARAM invModelview[4] = { state.matrix.modelview.invtrans }; \n" - - "# typical modelview/projection transform \n" - "DP4 result.position.x, pos, modelviewProj[0]; \n" - "DP4 result.position.y, pos, modelviewProj[1]; \n" - "DP4 result.position.z, pos, modelviewProj[2]; \n" - "DP4 result.position.w, pos, modelviewProj[3]; \n" - - "# transform normal by inv transpose of modelview, put in tex0 \n" - "DP3 result.texcoord[0].x, norm, invModelview[0]; \n" - "DP3 result.texcoord[0].y, norm, invModelview[1]; \n" - "DP3 result.texcoord[0].z, norm, invModelview[2]; \n" - "DP3 result.texcoord[0].w, norm, invModelview[3]; \n" - -#if DO_FRAGMENT_FOG - "# compute fog coordinate = vertex eye-space Z coord (negated)\n" - "DP4 result.fogcoord, -pos, modelview[2]; \n" -#endif - "END\n"; - ; - - if (!glutExtensionSupported("GL_ARB_vertex_program")) { - printf("Sorry, this demo requires GL_ARB_vertex_program\n"); - exit(1); - } - if (!glutExtensionSupported("GL_ARB_fragment_program")) { - printf("Sorry, this demo requires GL_ARB_fragment_program\n"); - exit(1); - } - - /* - * Get extension function pointers. - */ - glProgramLocalParameter4fvARB_func = (PFNGLPROGRAMLOCALPARAMETER4FVARBPROC) glutGetProcAddress("glProgramLocalParameter4fvARB"); - assert(glProgramLocalParameter4fvARB_func); - - glProgramLocalParameter4dARB_func = (PFNGLPROGRAMLOCALPARAMETER4DARBPROC) glutGetProcAddress("glProgramLocalParameter4dARB"); - assert(glProgramLocalParameter4dARB_func); - - glGetProgramLocalParameterdvARB_func = (PFNGLGETPROGRAMLOCALPARAMETERDVARBPROC) glutGetProcAddress("glGetProgramLocalParameterdvARB"); - assert(glGetProgramLocalParameterdvARB_func); - - glGenProgramsARB_func = (PFNGLGENPROGRAMSARBPROC) glutGetProcAddress("glGenProgramsARB"); - assert(glGenProgramsARB_func); - - glProgramStringARB_func = (PFNGLPROGRAMSTRINGARBPROC) glutGetProcAddress("glProgramStringARB"); - assert(glProgramStringARB_func); - - glBindProgramARB_func = (PFNGLBINDPROGRAMARBPROC) glutGetProcAddress("glBindProgramARB"); - assert(glBindProgramARB_func); - - glIsProgramARB_func = (PFNGLISPROGRAMARBPROC) glutGetProcAddress("glIsProgramARB"); - assert(glIsProgramARB_func); - - glDeleteProgramsARB_func = (PFNGLDELETEPROGRAMSARBPROC) glutGetProcAddress("glDeleteProgramsARB"); - assert(glDeleteProgramsARB_func); - - /* - * Fragment program - */ - glGenProgramsARB_func(1, &FragProg); - assert(FragProg > 0); - glBindProgramARB_func(GL_FRAGMENT_PROGRAM_ARB, FragProg); - glProgramStringARB_func(GL_FRAGMENT_PROGRAM_ARB, - GL_PROGRAM_FORMAT_ASCII_ARB, - strlen(fragProgramText), - (const GLubyte *) fragProgramText); - glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &errorPos); - if (glGetError() != GL_NO_ERROR || errorPos != -1) { - int l = FindLine(fragProgramText, errorPos); - printf("Fragment Program Error (pos=%d line=%d): %s\n", errorPos, l, - (char *) glGetString(GL_PROGRAM_ERROR_STRING_ARB)); - exit(0); - } - assert(glIsProgramARB_func(FragProg)); - - /* - * Do some sanity tests - */ - { - GLdouble v[4]; - glProgramLocalParameter4dARB_func(GL_FRAGMENT_PROGRAM_ARB, 8, - 10.0, 20.0, 30.0, 40.0); - glGetProgramLocalParameterdvARB_func(GL_FRAGMENT_PROGRAM_ARB, 8, v); - assert(v[0] == 10.0); - assert(v[1] == 20.0); - assert(v[2] == 30.0); - assert(v[3] == 40.0); - } - - /* - * Vertex program - */ - glGenProgramsARB_func(1, &VertProg); - assert(VertProg > 0); - glBindProgramARB_func(GL_VERTEX_PROGRAM_ARB, VertProg); - glProgramStringARB_func(GL_VERTEX_PROGRAM_ARB, - GL_PROGRAM_FORMAT_ASCII_ARB, - strlen(vertProgramText), - (const GLubyte *) vertProgramText); - glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &errorPos); - if (glGetError() != GL_NO_ERROR || errorPos != -1) { - int l = FindLine(vertProgramText, errorPos); - printf("Vertex Program Error (pos=%d line=%d): %s\n", errorPos, l, - (char *) glGetString(GL_PROGRAM_ERROR_STRING_ARB)); - exit(0); - } - assert(glIsProgramARB_func(VertProg)); - - /* - * Misc init - */ - glClearColor(0.3, 0.3, 0.3, 0.0); - glEnable(GL_DEPTH_TEST); - glEnable(GL_LIGHT0); - glEnable(GL_LIGHTING); - glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, Diffuse); - glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, Specular); - glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 20.0); - -#if DO_FRAGMENT_FOG - { - /* Green-ish fog color */ - static const GLfloat fogColor[4] = {0.5, 1.0, 0.5, 0}; - glFogfv(GL_FOG_COLOR, fogColor); - glFogf(GL_FOG_START, 5.0); - glFogf(GL_FOG_END, 25.0); - } -#endif - - printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER)); - printf("Press p to toggle between per-pixel and per-vertex lighting\n"); -} - - -int main( int argc, char *argv[] ) -{ - glutInitWindowSize( 200, 200 ); - glutInit( &argc, argv ); - glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH ); - Win = glutCreateWindow(argv[0]); - glutReshapeFunc( Reshape ); - glutKeyboardFunc( Key ); - glutSpecialFunc( SpecialKey ); - glutDisplayFunc( Redisplay ); - if (Anim) - glutIdleFunc(Idle); - Init(); - glutMainLoop(); - return 0; -} |