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Diffstat (limited to 'nx-X11/extras/Mesa_6.4.1/progs/demos/fogcoord.c')
-rw-r--r--nx-X11/extras/Mesa_6.4.1/progs/demos/fogcoord.c420
1 files changed, 0 insertions, 420 deletions
diff --git a/nx-X11/extras/Mesa_6.4.1/progs/demos/fogcoord.c b/nx-X11/extras/Mesa_6.4.1/progs/demos/fogcoord.c
deleted file mode 100644
index 19a15f05b..000000000
--- a/nx-X11/extras/Mesa_6.4.1/progs/demos/fogcoord.c
+++ /dev/null
@@ -1,420 +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/glut.h>
-
-#include "readtex.h"
-
-#define TEXTURE_FILE "../images/bw.rgb"
-
-#define ARRAYS 0 /* use glDrawElements */
-
-#define VERBOSE 1 /* tell me what happens */
-
-#define DEPTH 15.0f
-
-#if !defined(GLAPIENTRYP)
-# define GLAPIENTRYP *
-#endif
-
-typedef void (GLAPIENTRYP GLFOGCOORDFEXTPROC) (GLfloat f);
-typedef void (GLAPIENTRYP GLFOGCOORDPOINTEREXTPROC) (GLenum, GLsizei, const GLvoid *);
-
-static GLFOGCOORDFEXTPROC glFogCoordf_ext;
-#if ARRAYS
-static GLFOGCOORDPOINTEREXTPROC glFogCoordPointer_ext;
-#endif
-static GLboolean have_fog_coord;
-
-static GLfloat camz;
-static GLuint texture[1];
-
-static GLint fogMode;
-static GLboolean fogCoord;
-static GLfloat fogDensity = 0.75;
-static GLfloat fogStart = 1.0, fogEnd = 40.0;
-static GLfloat fogColor[4] = {0.6f, 0.3f, 0.0f, 1.0f};
-
-
-static void APIENTRY glFogCoordf_nop (GLfloat f)
-{
- (void)f;
-}
-
-
-static int BuildTexture (const char *filename, GLuint texid[])
-{
- GLubyte *tex_data;
- GLenum tex_format;
- GLint tex_width, tex_height;
-
- tex_data = LoadRGBImage(filename, &tex_width, &tex_height, &tex_format);
- if (tex_data == NULL) {
- return -1;
- }
-
- {
- GLint tex_max;
- glGetIntegerv(GL_MAX_TEXTURE_SIZE, &tex_max);
- if ((tex_width > tex_max) || (tex_height > tex_max)) {
- return -1;
- }
- }
-
- glGenTextures(1, texid);
-
- glBindTexture(GL_TEXTURE_2D, texid[0]);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-
- glTexImage2D(GL_TEXTURE_2D, 0, tex_format, tex_width, tex_height, 0,
- tex_format, GL_UNSIGNED_BYTE, tex_data);
-
- return 0;
-}
-
-
-static int SetFogMode (GLint fogMode)
-{
- fogMode &= 3;
- switch (fogMode) {
- case 0:
- glDisable(GL_FOG);
-#if VERBOSE
- printf("fog(disable)\n");
-#endif
- break;
- case 1:
- glEnable(GL_FOG);
- glFogi(GL_FOG_MODE, GL_LINEAR);
- glFogf(GL_FOG_START, fogStart);
- glFogf(GL_FOG_END, fogEnd);
-#if VERBOSE
- printf("fog(GL_LINEAR, %.2f, %.2f)\n", fogStart, fogEnd);
-#endif
- break;
- case 2:
- glEnable(GL_FOG);
- glFogi(GL_FOG_MODE, GL_EXP);
- glFogf(GL_FOG_DENSITY, fogDensity);
-#if VERBOSE
- printf("fog(GL_EXP, %.2f)\n", fogDensity);
-#endif
- break;
- case 3:
- glEnable(GL_FOG);
- glFogi(GL_FOG_MODE, GL_EXP2);
- glFogf(GL_FOG_DENSITY, fogDensity);
-#if VERBOSE
- printf("fog(GL_EXP2, %.2f)\n", fogDensity);
-#endif
- break;
- }
- return fogMode;
-}
-
-
-static GLboolean SetFogCoord (GLboolean fogCoord)
-{
- glFogCoordf_ext = glFogCoordf_nop;
-
- if (!have_fog_coord) {
-#if VERBOSE
- printf("fog(GL_FRAGMENT_DEPTH_EXT)%s\n", fogCoord ? " EXT_fog_coord not available!" : "");
-#endif
- return GL_FALSE;
- }
-
- if (fogCoord) {
- glFogCoordf_ext = (GLFOGCOORDFEXTPROC)glutGetProcAddress("glFogCoordfEXT");
- glFogi(GL_FOG_COORDINATE_SOURCE_EXT, GL_FOG_COORDINATE_EXT);
-#if VERBOSE
- printf("fog(GL_FOG_COORDINATE_EXT)\n");
-#endif
- } else {
- glFogi(GL_FOG_COORDINATE_SOURCE_EXT, GL_FRAGMENT_DEPTH_EXT);
-#if VERBOSE
- printf("fog(GL_FRAGMENT_DEPTH_EXT)\n");
-#endif
- }
- return fogCoord;
-}
-
-
-#if ARRAYS
-/* 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 */
- {-2.5f,-2.5f,-DEPTH}, { 2.5f,-2.5f,-DEPTH}, { 2.5f, 2.5f,-DEPTH}, {-2.5f, 2.5f,-DEPTH},
-
- /* Floor */
- {-2.5f,-2.5f,-DEPTH}, { 2.5f,-2.5f,-DEPTH}, { 2.5f,-2.5f, DEPTH}, {-2.5f,-2.5f, DEPTH},
-
- /* Roof */
- {-2.5f, 2.5f,-DEPTH}, { 2.5f, 2.5f,-DEPTH}, { 2.5f, 2.5f, DEPTH}, {-2.5f, 2.5f, DEPTH},
-
- /* Right */
- { 2.5f,-2.5f, DEPTH}, { 2.5f, 2.5f, DEPTH}, { 2.5f, 2.5f,-DEPTH}, { 2.5f,-2.5f,-DEPTH},
-
- /* Left */
- {-2.5f,-2.5f, DEPTH}, {-2.5f, 2.5f, DEPTH}, {-2.5f, 2.5f,-DEPTH}, {-2.5f,-2.5f,-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, 1.0f}, {0.0f, 1.0f},
-
- /* Roof */
- {0.0f, 0.0f}, {1.0f, 0.0f}, {1.0f, 1.0f}, {0.0f, 1.0f},
-
- /* Right */
- {0.0f, 0.0f}, {0.0f, 1.0f}, {1.0f, 1.0f}, {1.0f, 0.0f},
-
- /* Left */
- {0.0f, 0.0f}, {0.0f, 1.0f}, {1.0f, 1.0f}, {1.0f, 0.0f}
-};
-
-static GLfloat fogcoord_pointer[][1] = {
- /* Back */
- {1.0f}, {1.0f}, {1.0f}, {1.0f},
-
- /* Floor */
- {1.0f}, {1.0f}, {0.0f}, {0.0f},
-
- /* Roof */
- {1.0f}, {1.0f}, {0.0f}, {0.0f},
-
- /* Right */
- {0.0f}, {0.0f}, {1.0f}, {1.0f},
-
- /* Left */
- {0.0f}, {0.0f}, {1.0f}, {1.0f}
-};
-#endif
-
-
-static void Display( void )
-{
- glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
- glLoadIdentity ();
-
- glTranslatef(0.0f, 0.0f, camz);
-
-#if ARRAYS
- glDrawElements(GL_QUADS, sizeof(vertex_index) / sizeof(vertex_index[0]), GL_UNSIGNED_INT, vertex_index);
-#else
- /* Back */
- glBegin(GL_QUADS);
- glFogCoordf_ext(1.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f(-2.5f,-2.5f,-DEPTH);
- glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f( 2.5f,-2.5f,-DEPTH);
- glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f( 2.5f, 2.5f,-DEPTH);
- glFogCoordf_ext(1.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(-2.5f, 2.5f,-DEPTH);
- glEnd();
-
- /* Floor */
- glBegin(GL_QUADS);
- glFogCoordf_ext(1.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f(-2.5f,-2.5f,-DEPTH);
- glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f( 2.5f,-2.5f,-DEPTH);
- glFogCoordf_ext(0.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f( 2.5f,-2.5f, DEPTH);
- glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(-2.5f,-2.5f, DEPTH);
- glEnd();
-
- /* Roof */
- glBegin(GL_QUADS);
- glFogCoordf_ext(1.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f(-2.5f, 2.5f,-DEPTH);
- glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f( 2.5f, 2.5f,-DEPTH);
- glFogCoordf_ext(0.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f( 2.5f, 2.5f, DEPTH);
- glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(-2.5f, 2.5f, DEPTH);
- glEnd();
-
- /* Right */
- glBegin(GL_QUADS);
- glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f( 2.5f,-2.5f, DEPTH);
- glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f( 2.5f, 2.5f, DEPTH);
- glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f( 2.5f, 2.5f,-DEPTH);
- glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f( 2.5f,-2.5f,-DEPTH);
- glEnd();
-
- /* Left */
- glBegin(GL_QUADS);
- glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f(-2.5f,-2.5f, DEPTH);
- glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(-2.5f, 2.5f, DEPTH);
- glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f(-2.5f, 2.5f,-DEPTH);
- glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f(-2.5f,-2.5f,-DEPTH);
- glEnd();
-#endif
-
- glutSwapBuffers();
-}
-
-
-static void Reshape( int width, int height )
-{
- glViewport(0, 0, width, height);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- gluPerspective(45.0f, (GLfloat)(width)/(GLfloat)(height), 0.1f, 100.0f);
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
-}
-
-
-static void Key( unsigned char key, int x, int y )
-{
- (void) x;
- (void) y;
- switch (key) {
- case 'f':
- fogMode = SetFogMode(fogMode + 1);
- break;
- case '+':
- if (fogDensity < 1.0) {
- fogDensity += 0.05;
- }
- SetFogMode(fogMode);
- break;
- case '-':
- if (fogDensity > 0.0) {
- fogDensity -= 0.05;
- }
- SetFogMode(fogMode);
- break;
- case 's':
- if (fogStart > 0.0) {
- fogStart -= 1.0;
- }
- SetFogMode(fogMode);
- break;
- case 'S':
- if (fogStart < fogEnd) {
- fogStart += 1.0;
- }
- SetFogMode(fogMode);
- break;
- case 'e':
- if (fogEnd > fogStart) {
- fogEnd -= 1.0;
- }
- SetFogMode(fogMode);
- break;
- case 'E':
- if (fogEnd < 100.0) {
- fogEnd += 1.0;
- }
- SetFogMode(fogMode);
- break;
- case 'c':
- fogCoord = SetFogCoord(fogCoord ^ GL_TRUE);
- break;
- case 27:
- exit(0);
- break;
- }
- glutPostRedisplay();
-}
-
-
-static void SpecialKey( int key, int x, int y )
-{
- (void) x;
- (void) y;
- switch (key) {
- case GLUT_KEY_UP:
- if (camz < (DEPTH - 1.0)) {
- camz += 1.0f;
- }
- break;
- case GLUT_KEY_DOWN:
- if (camz > -19.0) {
- camz -= 1.0f;
- }
- break;
- }
- glutPostRedisplay();
-}
-
-
-static void Init( void )
-{
- have_fog_coord = glutExtensionSupported("GL_EXT_fog_coord");
-
- if (BuildTexture(TEXTURE_FILE, texture) == -1) {
- exit(1);
- }
-
- glEnable(GL_TEXTURE_2D);
- glClearColor(0.0f, 0.0f, 0.0f, 0.5f);
- glClearDepth(1.0f);
- 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(2); /* GL_EXP */
-
- camz = -19.0f;
-
-#if ARRAYS
- glEnableClientState(GL_VERTEX_ARRAY);
- glVertexPointer(3, GL_FLOAT, 0, vertex_pointer);
-
- glEnableClientState(GL_TEXTURE_COORD_ARRAY);
- glTexCoordPointer(2, GL_FLOAT, 0, texcoord_pointer);
-
- if (have_fog_coord) {
- glFogCoordPointer_ext = (GLFOGCOORDPOINTEREXTPROC)glutGetProcAddress("glFogCoordPointerEXT");
- glEnableClientState(GL_FOG_COORDINATE_ARRAY_EXT);
- glFogCoordPointer_ext(GL_FLOAT, 0, fogcoord_pointer);
- }
-#endif
-}
-
-
-int main( int argc, char *argv[] )
-{
- glutInit( &argc, argv );
- glutInitWindowPosition( 0, 0 );
- glutInitWindowSize( 640, 480 );
- glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
- glutCreateWindow(argv[0]);
- glutReshapeFunc( Reshape );
- glutKeyboardFunc( Key );
- glutSpecialFunc( SpecialKey );
- glutDisplayFunc( Display );
- Init();
- glutMainLoop();
- return 0;
-}
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