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/fogcoord.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/fogcoord.c')
-rw-r--r-- | progs/demos/fogcoord.c | 418 |
1 files changed, 0 insertions, 418 deletions
diff --git a/progs/demos/fogcoord.c b/progs/demos/fogcoord.c deleted file mode 100644 index 336aa58..0000000 --- a/progs/demos/fogcoord.c +++ /dev/null @@ -1,418 +0,0 @@ -/* - * EXT_fog_coord. - * - * Based on glutskel.c by Brian Paul - * and NeHe's Volumetric fog tutorial! - * - * Daniel Borca - */ - -#include <stdio.h> -#include <stdlib.h> -#include <math.h> -#include <GL/glew.h> -#include <GL/glut.h> - -#define DEPTH 5.0f - -static GLfloat camz; - -static GLint fogMode; -static GLboolean fogCoord; -static GLfloat fogDensity = 0.75; -static GLfloat fogStart = 1.0, fogEnd = DEPTH; -static GLfloat fogColor[4] = {0.6f, 0.3f, 0.0f, 1.0f}; -static const char *ModeStr = NULL; -static GLboolean Arrays = GL_FALSE; -static GLboolean Texture = GL_TRUE; - - -static void -Reset(void) -{ - fogMode = 1; - fogCoord = 1; - fogDensity = 0.75; - fogStart = 1.0; - fogEnd = DEPTH; - Arrays = GL_FALSE; - Texture = GL_TRUE; -} - - -static void -glFogCoordf_ext (GLfloat f) -{ - if (fogCoord) - glFogCoordfEXT(f); -} - - -static void -PrintString(const char *s) -{ - while (*s) { - glutBitmapCharacter(GLUT_BITMAP_8_BY_13, (int) *s); - s++; - } -} - - -static void -PrintInfo(void) -{ - char s[100]; - - glDisable(GL_FOG); - glColor3f(0, 1, 1); - - sprintf(s, "Mode(m): %s Start(s/S): %g End(e/E): %g Density(d/D): %g", - ModeStr, fogStart, fogEnd, fogDensity); - glWindowPos2iARB(5, 20); - PrintString(s); - - sprintf(s, "Arrays(a): %s glFogCoord(c): %s EyeZ(z/z): %g", - (Arrays ? "Yes" : "No"), - (fogCoord ? "Yes" : "No"), - camz); - glWindowPos2iARB(5, 5); - PrintString(s); -} - - -static int -SetFogMode(GLint fogMode) -{ - fogMode &= 3; - switch (fogMode) { - case 0: - ModeStr = "Off"; - glDisable(GL_FOG); - break; - case 1: - ModeStr = "GL_LINEAR"; - glEnable(GL_FOG); - glFogi(GL_FOG_MODE, GL_LINEAR); - glFogf(GL_FOG_START, fogStart); - glFogf(GL_FOG_END, fogEnd); - break; - case 2: - ModeStr = "GL_EXP"; - glEnable(GL_FOG); - glFogi(GL_FOG_MODE, GL_EXP); - glFogf(GL_FOG_DENSITY, fogDensity); - break; - case 3: - ModeStr = "GL_EXP2"; - glEnable(GL_FOG); - glFogi(GL_FOG_MODE, GL_EXP2); - glFogf(GL_FOG_DENSITY, fogDensity); - break; - } - return fogMode; -} - - -static GLboolean -SetFogCoord(GLboolean fogCoord) -{ - if (!GLEW_EXT_fog_coord) { - return GL_FALSE; - } - - if (fogCoord) { - glFogi(GL_FOG_COORDINATE_SOURCE_EXT, GL_FOG_COORDINATE_EXT); - } - else { - glFogi(GL_FOG_COORDINATE_SOURCE_EXT, GL_FRAGMENT_DEPTH_EXT); - } - return fogCoord; -} - - -/* could reuse vertices */ -static GLuint vertex_index[] = { - /* Back */ - 0, 1, 2, 3, - - /* Floor */ - 4, 5, 6, 7, - - /* Roof */ - 8, 9, 10, 11, - - /* Right */ - 12, 13, 14, 15, - - /* Left */ - 16, 17, 18, 19 -}; - -static GLfloat vertex_pointer[][3] = { - /* Back */ - {-1.0f,-1.0f,-DEPTH}, { 1.0f,-1.0f,-DEPTH}, { 1.0f, 1.0f,-DEPTH}, {-1.0f, 1.0f,-DEPTH}, - - /* Floor */ - {-1.0f,-1.0f,-DEPTH}, { 1.0f,-1.0f,-DEPTH}, { 1.0f,-1.0f, 0.0}, {-1.0f,-1.0f, 0.0}, - - /* Roof */ - {-1.0f, 1.0f,-DEPTH}, { 1.0f, 1.0f,-DEPTH}, { 1.0f, 1.0f, 0.0}, {-1.0f, 1.0f, 0.0}, - - /* Right */ - { 1.0f,-1.0f, 0.0}, { 1.0f, 1.0f, 0.0}, { 1.0f, 1.0f,-DEPTH}, { 1.0f,-1.0f,-DEPTH}, - - /* Left */ - {-1.0f,-1.0f, 0.0}, {-1.0f, 1.0f, 0.0}, {-1.0f, 1.0f,-DEPTH}, {-1.0f,-1.0f,-DEPTH} -}; - -static GLfloat texcoord_pointer[][2] = { - /* Back */ - {0.0f, 0.0f}, {1.0f, 0.0f}, {1.0f, 1.0f}, {0.0f, 1.0f}, - - /* Floor */ - {0.0f, 0.0f}, {1.0f, 0.0f}, {1.0f, DEPTH}, {0.0f, DEPTH}, - - /* Roof */ - {1.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, DEPTH}, {1.0f, DEPTH}, - - /* Right */ - {0.0f, 1.0f}, {0.0f, 0.0f}, {DEPTH, 0.0f}, {DEPTH, 1.0f}, - - /* Left */ - {0.0f, 0.0f}, {0.0f, 1.0f}, {DEPTH, 1.0f}, {DEPTH, 0.0f} -}; - -static GLfloat fogcoord_pointer[] = { - /* Back */ - DEPTH, DEPTH, DEPTH, DEPTH, - - /* Floor */ - DEPTH, DEPTH, 0.0, 0.0, - - /* Roof */ - DEPTH, DEPTH, 0.0, 0.0, - - /* Right */ - 0.0, 0.0, DEPTH, DEPTH, - - /* Left */ - 0.0, 0.0, DEPTH, DEPTH -}; - - -static void -Display( void ) -{ - glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); - glLoadIdentity (); - - glTranslatef(0.0f, 0.0f, -camz); - - SetFogMode(fogMode); - - glColor3f(1, 1, 1); - - if (Texture) - glEnable(GL_TEXTURE_2D); - - if (Arrays) { - glEnableClientState(GL_VERTEX_ARRAY); - glEnableClientState(GL_TEXTURE_COORD_ARRAY); - glDrawElements(GL_QUADS, sizeof(vertex_index) / sizeof(vertex_index[0]), - GL_UNSIGNED_INT, vertex_index); - glDisableClientState(GL_VERTEX_ARRAY); - glDisableClientState(GL_TEXTURE_COORD_ARRAY); - } - else { - /* Back */ - glBegin(GL_QUADS); - glFogCoordf_ext(DEPTH); glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f,-1.0f,-DEPTH); - glFogCoordf_ext(DEPTH); glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f,-1.0f,-DEPTH); - glFogCoordf_ext(DEPTH); glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f,-DEPTH); - glFogCoordf_ext(DEPTH); glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f,-DEPTH); - glEnd(); - - /* Floor */ - glBegin(GL_QUADS); - glFogCoordf_ext(DEPTH); glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f,-1.0f,-DEPTH); - glFogCoordf_ext(DEPTH); glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f,-1.0f,-DEPTH); - glFogCoordf_ext(0.0f); glTexCoord2f(1.0f, DEPTH); glVertex3f( 1.0f,-1.0f,0.0); - glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, DEPTH); glVertex3f(-1.0f,-1.0f,0.0); - glEnd(); - - /* Roof */ - glBegin(GL_QUADS); - glFogCoordf_ext(DEPTH); glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, 1.0f,-DEPTH); - glFogCoordf_ext(DEPTH); glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, 1.0f,-DEPTH); - glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, DEPTH); glVertex3f( 1.0f, 1.0f,0.0); - glFogCoordf_ext(0.0f); glTexCoord2f(1.0f, DEPTH); glVertex3f(-1.0f, 1.0f,0.0); - glEnd(); - - /* Right */ - glBegin(GL_QUADS); - glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f,-1.0f,0.0); - glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, 1.0f,0.0); - glFogCoordf_ext(DEPTH); glTexCoord2f(DEPTH, 0.0f); glVertex3f( 1.0f, 1.0f,-DEPTH); - glFogCoordf_ext(DEPTH); glTexCoord2f(DEPTH, 1.0f); glVertex3f( 1.0f,-1.0f,-DEPTH); - glEnd(); - - /* Left */ - glBegin(GL_QUADS); - glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f,-1.0f,0.0); - glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f,0.0); - glFogCoordf_ext(DEPTH); glTexCoord2f(DEPTH, 1.0f); glVertex3f(-1.0f, 1.0f,-DEPTH); - glFogCoordf_ext(DEPTH); glTexCoord2f(DEPTH, 0.0f); glVertex3f(-1.0f,-1.0f,-DEPTH); - glEnd(); - } - - glDisable(GL_TEXTURE_2D); - - PrintInfo(); - - glutSwapBuffers(); -} - - -static void -Reshape( int width, int height ) -{ - glViewport(0, 0, width, height); - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - glFrustum(-1, 1, -1, 1, 1.0, 100); - glMatrixMode(GL_MODELVIEW); - glLoadIdentity(); -} - - -static void -Key( unsigned char key, int x, int y ) -{ - (void) x; - (void) y; - switch (key) { - case 'a': - Arrays = !Arrays; - break; - case 'f': - case 'm': - fogMode = SetFogMode(fogMode + 1); - break; - case 'D': - fogDensity += 0.05; - SetFogMode(fogMode); - break; - case 'd': - if (fogDensity > 0.0) { - fogDensity -= 0.05; - } - SetFogMode(fogMode); - break; - case 's': - if (fogStart > 0.0) { - fogStart -= 0.25; - } - SetFogMode(fogMode); - break; - case 'S': - if (fogStart < 100.0) { - fogStart += 0.25; - } - SetFogMode(fogMode); - break; - case 'e': - if (fogEnd > 0.0) { - fogEnd -= 0.25; - } - SetFogMode(fogMode); - break; - case 'E': - if (fogEnd < 100.0) { - fogEnd += 0.25; - } - SetFogMode(fogMode); - break; - case 'c': - fogCoord = SetFogCoord(fogCoord ^ GL_TRUE); - break; - case 't': - Texture = !Texture; - break; - case 'z': - camz -= 0.1; - break; - case 'Z': - camz += 0.1; - break; - case 'r': - Reset(); - break; - case 27: - exit(0); - break; - } - glutPostRedisplay(); -} - - -static void -Init(void) -{ - static const GLubyte teximage[2][2][4] = { - { { 255, 255, 255, 255}, { 128, 128, 128, 255} }, - { { 128, 128, 128, 255}, { 255, 255, 255, 255} } - }; - - printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER)); - - if (!GLEW_EXT_fog_coord) { - printf("GL_EXT_fog_coord not supported!\n"); - } - - glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 2, 2, 0, - GL_RGBA, GL_UNSIGNED_BYTE, teximage); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); - - glClearColor(0.1f, 0.1f, 0.1f, 0.0f); - - glDepthFunc(GL_LEQUAL); - glEnable(GL_DEPTH_TEST); - glShadeModel(GL_SMOOTH); - glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); - - glFogfv(GL_FOG_COLOR, fogColor); - glHint(GL_FOG_HINT, GL_NICEST); - fogCoord = SetFogCoord(GL_TRUE); /* try to enable fog_coord */ - fogMode = SetFogMode(1); - - glEnableClientState(GL_VERTEX_ARRAY); - glVertexPointer(3, GL_FLOAT, 0, vertex_pointer); - - glEnableClientState(GL_TEXTURE_COORD_ARRAY); - glTexCoordPointer(2, GL_FLOAT, 0, texcoord_pointer); - - if (GLEW_EXT_fog_coord) { - glEnableClientState(GL_FOG_COORDINATE_ARRAY_EXT); - glFogCoordPointerEXT(GL_FLOAT, 0, fogcoord_pointer); - } - - Reset(); -} - - -int -main( int argc, char *argv[] ) -{ - glutInitWindowSize( 600, 600 ); - glutInit( &argc, argv ); - glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH ); - glutCreateWindow(argv[0]); - glewInit(); - glutReshapeFunc( Reshape ); - glutKeyboardFunc( Key ); - glutDisplayFunc( Display ); - Init(); - glutMainLoop(); - return 0; -} |