146 lines
2.6 KiB
C
146 lines
2.6 KiB
C
/* $Id: glutskel.c,v 1.1 1999/08/19 00:55:42 jtg Exp $ */
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/*
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* A skeleton/template GLUT program
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*
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* Written by Brian Paul and in the public domain.
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*/
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/*
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* $Log: glutskel.c,v $
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* Revision 1.1 1999/08/19 00:55:42 jtg
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* Initial revision
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*
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* Revision 1.2 1998/11/07 14:20:14 brianp
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* added simple rotation, animation of cube
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*
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* Revision 1.1 1998/11/07 14:14:37 brianp
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* Initial revision
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include <GL/glut.h>
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static GLfloat Xrot = 0, Yrot = 0, Zrot = 0;
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static GLboolean Anim = GL_FALSE;
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static void Idle( void )
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{
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Xrot += 3.0;
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Yrot += 4.0;
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Zrot += 2.0;
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glutPostRedisplay();
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}
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static void Display( void )
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{
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glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
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glPushMatrix();
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glRotatef(Xrot, 1, 0, 0);
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glRotatef(Yrot, 0, 1, 0);
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glRotatef(Zrot, 0, 0, 1);
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glutSolidCube(2.0);
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glPopMatrix();
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glutSwapBuffers();
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}
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static void Reshape( int width, int height )
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{
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glViewport( 0, 0, width, height );
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glMatrixMode( GL_PROJECTION );
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glLoadIdentity();
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glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 25.0 );
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glMatrixMode( GL_MODELVIEW );
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glLoadIdentity();
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glTranslatef( 0.0, 0.0, -15.0 );
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}
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static void Key( unsigned char key, int x, int y )
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{
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const GLfloat step = 3.0;
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(void) x;
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(void) y;
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switch (key) {
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case 'a':
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Anim = !Anim;
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if (Anim)
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glutIdleFunc(Idle);
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else
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glutIdleFunc(NULL);
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break;
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case 'z':
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Zrot -= step;
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break;
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case 'Z':
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Zrot += step;
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break;
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case 27:
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exit(0);
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break;
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}
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glutPostRedisplay();
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}
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static void SpecialKey( int key, int x, int y )
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{
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const GLfloat step = 3.0;
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(void) x;
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(void) y;
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switch (key) {
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case GLUT_KEY_UP:
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Xrot -= step;
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break;
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case GLUT_KEY_DOWN:
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Xrot += step;
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break;
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case GLUT_KEY_LEFT:
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Yrot -= step;
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break;
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case GLUT_KEY_RIGHT:
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Yrot += step;
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break;
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}
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glutPostRedisplay();
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}
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static void Init( void )
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{
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/* setup lighting, etc */
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glEnable(GL_DEPTH_TEST);
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glEnable(GL_LIGHTING);
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glEnable(GL_LIGHT0);
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}
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int main( int argc, char *argv[] )
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{
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glutInit( &argc, argv );
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glutInitWindowPosition( 0, 0 );
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glutInitWindowSize( 400, 400 );
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glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
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glutCreateWindow(argv[0]);
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glutReshapeFunc( Reshape );
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glutKeyboardFunc( Key );
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glutSpecialFunc( SpecialKey );
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glutDisplayFunc( Display );
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Init();
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glutMainLoop();
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return 0;
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}
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