aboutsummaryrefslogtreecommitdiff
path: root/nx-X11/extras/Mesa_6.4.1/progs/demos/cubemap.c
diff options
context:
space:
mode:
Diffstat (limited to 'nx-X11/extras/Mesa_6.4.1/progs/demos/cubemap.c')
-rw-r--r--nx-X11/extras/Mesa_6.4.1/progs/demos/cubemap.c475
1 files changed, 0 insertions, 475 deletions
diff --git a/nx-X11/extras/Mesa_6.4.1/progs/demos/cubemap.c b/nx-X11/extras/Mesa_6.4.1/progs/demos/cubemap.c
deleted file mode 100644
index 0a59b9898..000000000
--- a/nx-X11/extras/Mesa_6.4.1/progs/demos/cubemap.c
+++ /dev/null
@@ -1,475 +0,0 @@
-/*
- * GL_ARB_texture_cube_map demo
- *
- * Brian Paul
- * May 2000
- *
- *
- * Copyright (C) 2000 Brian Paul All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-
-/*
- * This is a pretty minimalistic demo for now. Eventually, use some
- * interesting cube map textures and 3D objects.
- * For now, we use 6 checkerboard "walls" and a sphere (good for
- * verification purposes).
- */
-
-
-#include <assert.h>
-#include <math.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include "GL/glut.h"
-#include "readtex.h"
-
-
-static GLfloat Xrot = 0, Yrot = 0;
-static GLfloat EyeDist = 10;
-static GLboolean use_vertex_arrays = GL_FALSE;
-static GLboolean anim = GL_TRUE;
-
-#define eps1 0.99
-#define br 20.0 /* box radius */
-
-static const GLfloat tex_coords[] = {
- /* +X side */
- 1.0, -eps1, -eps1,
- 1.0, -eps1, eps1,
- 1.0, eps1, eps1,
- 1.0, eps1, -eps1,
-
- /* -X side */
- -1.0, eps1, -eps1,
- -1.0, eps1, eps1,
- -1.0, -eps1, eps1,
- -1.0, -eps1, -eps1,
-
- /* +Y side */
- -eps1, 1.0, -eps1,
- -eps1, 1.0, eps1,
- eps1, 1.0, eps1,
- eps1, 1.0, -eps1,
-
- /* -Y side */
- -eps1, -1.0, -eps1,
- -eps1, -1.0, eps1,
- eps1, -1.0, eps1,
- eps1, -1.0, -eps1,
-
- /* +Z side */
- eps1, -eps1, 1.0,
- -eps1, -eps1, 1.0,
- -eps1, eps1, 1.0,
- eps1, eps1, 1.0,
-
- /* -Z side */
- eps1, eps1, -1.0,
- -eps1, eps1, -1.0,
- -eps1, -eps1, -1.0,
- eps1, -eps1, -1.0,
-};
-
-static const GLfloat vtx_coords[] = {
- /* +X side */
- br, -br, -br,
- br, -br, br,
- br, br, br,
- br, br, -br,
-
- /* -X side */
- -br, br, -br,
- -br, br, br,
- -br, -br, br,
- -br, -br, -br,
-
- /* +Y side */
- -br, br, -br,
- -br, br, br,
- br, br, br,
- br, br, -br,
-
- /* -Y side */
- -br, -br, -br,
- -br, -br, br,
- br, -br, br,
- br, -br, -br,
-
- /* +Z side */
- br, -br, br,
- -br, -br, br,
- -br, br, br,
- br, br, br,
-
- /* -Z side */
- br, br, -br,
- -br, br, -br,
- -br, -br, -br,
- br, -br, -br,
-};
-
-static void draw_skybox( void )
-{
- if ( use_vertex_arrays ) {
- glTexCoordPointer( 3, GL_FLOAT, 0, tex_coords );
- glVertexPointer( 3, GL_FLOAT, 0, vtx_coords );
-
- glEnableClientState( GL_TEXTURE_COORD_ARRAY );
- glEnableClientState( GL_VERTEX_ARRAY );
-
- glDrawArrays( GL_QUADS, 0, 24 );
-
- glDisableClientState( GL_TEXTURE_COORD_ARRAY );
- glDisableClientState( GL_VERTEX_ARRAY );
- }
- else {
- unsigned i;
-
- glBegin(GL_QUADS);
- for ( i = 0 ; i < 24 ; i++ ) {
- glTexCoord3fv( & tex_coords[ i * 3 ] );
- glVertex3fv ( & vtx_coords[ i * 3 ] );
- }
- glEnd();
- }
-}
-
-
-static void draw( void )
-{
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
- glPushMatrix(); /*MODELVIEW*/
- glTranslatef( 0.0, 0.0, -EyeDist );
-
- /* skybox */
- glDisable(GL_TEXTURE_GEN_S);
- glDisable(GL_TEXTURE_GEN_T);
- glDisable(GL_TEXTURE_GEN_R);
-
- glMatrixMode(GL_MODELVIEW);
- glPushMatrix();
- glRotatef(Xrot, 1, 0, 0);
- glRotatef(Yrot, 0, 1, 0);
- draw_skybox();
- glPopMatrix();
-
- /* sphere */
- glMatrixMode(GL_TEXTURE);
- glLoadIdentity();
- glRotatef(-Yrot, 0, 1, 0);
- glRotatef(-Xrot, 1, 0, 0);
-
- glEnable(GL_TEXTURE_GEN_S);
- glEnable(GL_TEXTURE_GEN_T);
- glEnable(GL_TEXTURE_GEN_R);
- glutSolidSphere(2.0, 20, 20);
-
- glLoadIdentity(); /* texture */
-
- glMatrixMode(GL_MODELVIEW);
- glPopMatrix();
-
- glutSwapBuffers();
-}
-
-
-static void idle(void)
-{
- GLfloat t = 0.05 * glutGet(GLUT_ELAPSED_TIME);
- Yrot = t;
- glutPostRedisplay();
-}
-
-
-static void set_mode(GLuint mode)
-{
- if (mode == 0) {
- glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP_ARB);
- glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP_ARB);
- glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP_ARB);
- printf("GL_REFLECTION_MAP_ARB mode\n");
- }
- else if (mode == 1) {
- glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_NORMAL_MAP_ARB);
- glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_NORMAL_MAP_ARB);
- glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_NORMAL_MAP_ARB);
- printf("GL_NORMAL_MAP_ARB mode\n");
- }
-}
-
-
-static void key(unsigned char k, int x, int y)
-{
- static GLuint mode = 0;
- (void) x;
- (void) y;
- switch (k) {
- case ' ':
- anim = !anim;
- if (anim)
- glutIdleFunc(idle);
- else
- glutIdleFunc(NULL);
- break;
- case 'm':
- mode = !mode;
- set_mode(mode);
- break;
- case 'v':
- use_vertex_arrays = ! use_vertex_arrays;
- printf( "Vertex arrays are %sabled\n",
- (use_vertex_arrays) ? "en" : "dis" );
- break;
- case 'z':
- EyeDist -= 0.5;
- if (EyeDist < 6.0)
- EyeDist = 6.0;
- break;
- case 'Z':
- EyeDist += 0.5;
- if (EyeDist > 90.0)
- EyeDist = 90;
- break;
- case 27:
- exit(0);
- }
- glutPostRedisplay();
-}
-
-
-static void specialkey(int key, int x, int y)
-{
- GLfloat step = 5;
- (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();
-}
-
-
-/* new window size or exposure */
-static void reshape(int width, int height)
-{
- GLfloat ar = (float) width / (float) height;
- glViewport(0, 0, (GLint)width, (GLint)height);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glFrustum( -2.0*ar, 2.0*ar, -2.0, 2.0, 4.0, 100.0 );
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
-}
-
-
-static void init_checkers( void )
-{
-#define CUBE_TEX_SIZE 64
- GLubyte image[CUBE_TEX_SIZE][CUBE_TEX_SIZE][3];
- static const GLubyte colors[6][3] = {
- { 255, 0, 0 }, /* face 0 - red */
- { 0, 255, 255 }, /* face 1 - cyan */
- { 0, 255, 0 }, /* face 2 - green */
- { 255, 0, 255 }, /* face 3 - purple */
- { 0, 0, 255 }, /* face 4 - blue */
- { 255, 255, 0 } /* face 5 - yellow */
- };
- static const GLenum targets[6] = {
- GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB,
- GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB,
- GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB,
- GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB,
- GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB,
- GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB
- };
-
- GLint i, j, f;
-
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
-
- /* make colored checkerboard cube faces */
- for (f = 0; f < 6; f++) {
- for (i = 0; i < CUBE_TEX_SIZE; i++) {
- for (j = 0; j < CUBE_TEX_SIZE; j++) {
- if ((i/4 + j/4) & 1) {
- image[i][j][0] = colors[f][0];
- image[i][j][1] = colors[f][1];
- image[i][j][2] = colors[f][2];
- }
- else {
- image[i][j][0] = 255;
- image[i][j][1] = 255;
- image[i][j][2] = 255;
- }
- }
- }
-
- glTexImage2D(targets[f], 0, GL_RGB, CUBE_TEX_SIZE, CUBE_TEX_SIZE, 0,
- GL_RGB, GL_UNSIGNED_BYTE, image);
- }
-}
-
-
-static void load(GLenum target, const char *filename,
- GLboolean flipTB, GLboolean flipLR)
-{
- GLint w, h;
- GLenum format;
- GLubyte *img = LoadRGBImage( filename, &w, &h, &format );
- if (!img) {
- printf("Error: couldn't load texture image %s\n", filename);
- exit(1);
- }
- assert(format == GL_RGB);
-
- /* <sigh> the way the texture cube mapping works, we have to flip
- * images to make things look right.
- */
- if (flipTB) {
- const int stride = 3 * w;
- GLubyte temp[3*1024];
- int i;
- for (i = 0; i < h / 2; i++) {
- memcpy(temp, img + i * stride, stride);
- memcpy(img + i * stride, img + (h - i - 1) * stride, stride);
- memcpy(img + (h - i - 1) * stride, temp, stride);
- }
- }
- if (flipLR) {
- const int stride = 3 * w;
- GLubyte temp[3];
- GLubyte *row;
- int i, j;
- for (i = 0; i < h; i++) {
- row = img + i * stride;
- for (j = 0; j < w / 2; j++) {
- int k = w - j - 1;
- temp[0] = row[j*3+0];
- temp[1] = row[j*3+1];
- temp[2] = row[j*3+2];
- row[j*3+0] = row[k*3+0];
- row[j*3+1] = row[k*3+1];
- row[j*3+2] = row[k*3+2];
- row[k*3+0] = temp[0];
- row[k*3+1] = temp[1];
- row[k*3+2] = temp[2];
- }
- }
- }
-
- gluBuild2DMipmaps(target, GL_RGB, w, h, format, GL_UNSIGNED_BYTE, img);
- free(img);
-}
-
-
-static void load_envmaps(void)
-{
- load(GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB, "right.rgb", GL_TRUE, GL_FALSE);
- load(GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB, "left.rgb", GL_TRUE, GL_FALSE);
- load(GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB, "top.rgb", GL_FALSE, GL_TRUE);
- load(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB, "bottom.rgb", GL_FALSE, GL_TRUE);
- load(GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB, "front.rgb", GL_TRUE, GL_FALSE);
- load(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB, "back.rgb", GL_TRUE, GL_FALSE);
-}
-
-
-static void init( GLboolean useImageFiles )
-{
- GLenum filter;
-
- /* check for extension */
- {
- char *exten = (char *) glGetString(GL_EXTENSIONS);
- if (!strstr(exten, "GL_ARB_texture_cube_map")) {
- printf("Sorry, this demo requires GL_ARB_texture_cube_map\n");
- exit(0);
- }
- }
- printf("GL_RENDERER: %s\n", (char *) glGetString(GL_RENDERER));
-
- if (useImageFiles) {
- load_envmaps();
- filter = GL_LINEAR;
- }
- else {
- init_checkers();
- filter = GL_NEAREST;
- }
-
- glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_MIN_FILTER, filter);
- glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_MAG_FILTER, filter);
- glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
- glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-
- glEnable(GL_TEXTURE_CUBE_MAP_ARB);
- glEnable(GL_DEPTH_TEST);
-
- glClearColor(.3, .3, .3, 0);
- glColor3f( 1.0, 1.0, 1.0 );
-
- set_mode(0);
-}
-
-
-static void usage(void)
-{
- printf("keys:\n");
- printf(" SPACE - toggle animation\n");
- printf(" CURSOR KEYS - rotation\n");
- printf(" m - toggle texgen reflection mode\n");
- printf(" z/Z - change viewing distance\n");
-}
-
-
-int main( int argc, char *argv[] )
-{
- glutInitWindowPosition(0, 0);
- glutInitWindowSize(600, 500);
- glutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
- glutCreateWindow("Texture Cube Mapping");
-
- if (argc > 1 && strcmp(argv[1] , "-i") == 0)
- init( 1 );
- else
- init( 0 );
- glutReshapeFunc( reshape );
- glutKeyboardFunc( key );
- glutSpecialFunc( specialkey );
- glutDisplayFunc( draw );
- if (anim)
- glutIdleFunc(idle);
- usage();
- glutMainLoop();
- return 0;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 05:49:32 +0000