+++ /dev/null
-
-/*
- * Textured cylinder demo: lighting, texturing, reflection mapping.
- *
- * Command line options:
- * -info print GL implementation information
- *
- *
- * Brian Paul May 1997 This program is in the public domain.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <math.h>
-#include <string.h>
-#include <GL/glut.h>
-
-#include "readtex.h"
-
-#define TEXTURE_FILE "../images/reflect.rgb"
-
-#define LIT 1
-#define TEXTURED 2
-#define REFLECT 3
-#define ANIMATE 10
-#define POINT_FILTER 20
-#define LINEAR_FILTER 21
-#define QUIT 100
-
-static GLint Win = -1;
-
-static GLuint CylinderObj = 0;
-static GLboolean Animate = GL_TRUE;
-
-static GLfloat Xrot = 0.0, Yrot = 0.0, Zrot = 0.0;
-static GLfloat DXrot = 50.0, DYrot = 125.0;
-
-/* performance info */
-static GLint T0 = 0;
-static GLint Frames = 0;
-
-
-static void Idle( void )
-{
- static double t0 = -1.;
- double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
- if (t0 < 0.0)
- t0 = t;
- dt = t - t0;
- t0 = t;
-
- if (Animate) {
- Xrot += DXrot * dt;
- Yrot += DYrot * dt;
- glutPostRedisplay();
- }
-}
-
-
-static void Display( void )
-{
- glClear( GL_COLOR_BUFFER_BIT );
-
- glPushMatrix();
- glRotatef(Xrot, 1.0, 0.0, 0.0);
- glRotatef(Yrot, 0.0, 1.0, 0.0);
- glRotatef(Zrot, 0.0, 0.0, 1.0);
- glScalef(5.0, 5.0, 5.0);
- glCallList(CylinderObj);
-
- glPopMatrix();
-
- glutSwapBuffers();
-
- if (Animate) {
- GLint t = glutGet(GLUT_ELAPSED_TIME);
- Frames++;
- if (t - T0 >= 5000) {
- GLfloat seconds = (t - T0) / 1000.0;
- GLfloat fps = Frames / seconds;
- printf("%d frames in %g seconds = %g FPS\n", Frames, seconds, fps);
- fflush(stdout);
- T0 = t;
- Frames = 0;
- }
- }
-}
-
-
-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, 10.0, 100.0 );
- glMatrixMode( GL_MODELVIEW );
- glLoadIdentity();
- glTranslatef( 0.0, 0.0, -70.0 );
-}
-
-
-static void SetMode(GLuint m)
-{
- /* disable everything */
- glDisable(GL_LIGHTING);
- glDisable(GL_TEXTURE_2D);
- glDisable(GL_TEXTURE_GEN_S);
- glDisable(GL_TEXTURE_GEN_T);
-
- /* enable what's needed */
- if (m==LIT) {
- glEnable(GL_LIGHTING);
- }
- else if (m==TEXTURED) {
- glEnable(GL_TEXTURE_2D);
- }
- else if (m==REFLECT) {
- glEnable(GL_TEXTURE_2D);
- glEnable(GL_TEXTURE_GEN_S);
- glEnable(GL_TEXTURE_GEN_T);
- }
-}
-
-
-static void ModeMenu(int entry)
-{
- if (entry==ANIMATE) {
- Animate = !Animate;
- if (Animate)
- glutIdleFunc(Idle);
- else
- glutIdleFunc(NULL);
- }
- else if (entry==POINT_FILTER) {
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
- }
- else if (entry==LINEAR_FILTER) {
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
- }
- else if (entry==QUIT) {
- exit(0);
- }
- else {
- SetMode(entry);
- }
- glutPostRedisplay();
-}
-
-
-static void Key( unsigned char key, int x, int y )
-{
- (void) x;
- (void) y;
- switch (key) {
- case ' ':
- Animate = !Animate;
- if (Animate)
- glutIdleFunc(Idle);
- else
- glutIdleFunc(NULL);
- break;
- case 27:
- glutDestroyWindow(Win);
- exit(0);
- break;
- }
- glutPostRedisplay();
-}
-
-
-static void SpecialKey( int key, int x, int y )
-{
- float 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();
-}
-
-
-static void Init( int argc, char *argv[] )
-{
- GLUquadricObj *q = gluNewQuadric();
- CylinderObj = glGenLists(1);
- glNewList(CylinderObj, GL_COMPILE);
-
- glTranslatef(0.0, 0.0, -1.0);
-
- /* cylinder */
- gluQuadricNormals(q, GL_SMOOTH);
- gluQuadricTexture(q, GL_TRUE);
- gluCylinder(q, 0.6, 0.6, 2.0, 24, 1);
-
- /* end cap */
- glTranslatef(0.0, 0.0, 2.0);
- gluDisk(q, 0.0, 0.6, 24, 1);
-
- /* other end cap */
- glTranslatef(0.0, 0.0, -2.0);
- gluQuadricOrientation(q, GLU_INSIDE);
- gluDisk(q, 0.0, 0.6, 24, 1);
-
- glEndList();
- gluDeleteQuadric(q);
-
- /* lighting */
- glEnable(GL_LIGHTING);
- {
- GLfloat gray[4] = {0.2, 0.2, 0.2, 1.0};
- GLfloat white[4] = {1.0, 1.0, 1.0, 1.0};
- GLfloat teal[4] = { 0.0, 1.0, 0.8, 1.0 };
- glMaterialfv(GL_FRONT, GL_DIFFUSE, teal);
- glLightfv(GL_LIGHT0, GL_AMBIENT, gray);
- glLightfv(GL_LIGHT0, GL_DIFFUSE, white);
- glEnable(GL_LIGHT0);
- }
-
- /* fitering = nearest, initially */
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
-
- glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
- glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST);
-
- glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
- glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
-
- if (!LoadRGBMipmaps(TEXTURE_FILE, GL_RGB)) {
- printf("Error: couldn't load texture image\n");
- exit(1);
- }
-
- glEnable(GL_CULL_FACE); /* don't need Z testing for convex objects */
-
- SetMode(LIT);
-
- if (argc > 1 && strcmp(argv[1], "-info")==0) {
- printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
- printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
- printf("GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));
- printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
- }
-}
-
-
-int main( int argc, char *argv[] )
-{
- glutInitWindowSize( 400, 400 );
- glutInit( &argc, argv );
- glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
-
- Win = glutCreateWindow(argv[0] );
-
- Init(argc, argv);
-
- glutReshapeFunc( Reshape );
- glutKeyboardFunc( Key );
- glutSpecialFunc( SpecialKey );
- glutDisplayFunc( Display );
- glutIdleFunc( Idle );
-
- glutCreateMenu(ModeMenu);
- glutAddMenuEntry("Lit", LIT);
- glutAddMenuEntry("Textured", TEXTURED);
- glutAddMenuEntry("Reflect", REFLECT);
- glutAddMenuEntry("Point Filtered", POINT_FILTER);
- glutAddMenuEntry("Linear Filtered", LINEAR_FILTER);
- glutAddMenuEntry("Toggle Animation", ANIMATE);
- glutAddMenuEntry("Quit", QUIT);
- glutAttachMenu(GLUT_RIGHT_BUTTON);
-
- glutMainLoop();
- return 0;
-}
projects / mesa.git / blobdiff