161 lines
2.7 KiB
C
161 lines
2.7 KiB
C
/* spin.c */
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/*
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* Spinning box. This program is in the public domain.
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*
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* Brian Paul
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*/
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#include <math.h>
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#include <stdio.h>
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#include <GL/glx.h>
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#include <GL/gl.h>
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#include "ui.h"
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static GLfloat Xrot, Xstep;
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static GLfloat Yrot, Ystep;
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static GLfloat Zrot, Zstep;
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static GLfloat Step = 5.0;
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static GLfloat Scale = 1.0;
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static GLuint Object;
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static GLuint make_object( void )
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{
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GLuint list;
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list = glGenLists( 1 );
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glNewList( list, GL_COMPILE );
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glBegin( GL_LINE_LOOP );
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glColor3f( 1.0, 1.0, 1.0 );
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glVertex3f( 1.0, 0.5, -0.4 );
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glColor3f( 1.0, 0.0, 0.0 );
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glVertex3f( 1.0, -0.5, -0.4 );
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glColor3f( 0.0, 1.0, 0.0 );
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glVertex3f( -1.0, -0.5, -0.4 );
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glColor3f( 0.0, 0.0, 1.0 );
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glVertex3f( -1.0, 0.5, -0.4 );
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glEnd();
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glColor3f( 1.0, 1.0, 1.0 );
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glBegin( GL_LINE_LOOP );
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glVertex3f( 1.0, 0.5, 0.4 );
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glVertex3f( 1.0, -0.5, 0.4 );
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glVertex3f( -1.0, -0.5, 0.4 );
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glVertex3f( -1.0, 0.5, 0.4 );
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glEnd();
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glBegin( GL_LINES );
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glVertex3f( 1.0, 0.5, -0.4 ); glVertex3f( 1.0, 0.5, 0.4 );
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glVertex3f( 1.0, -0.5, -0.4 ); glVertex3f( 1.0, -0.5, 0.4 );
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glVertex3f( -1.0, -0.5, -0.4 ); glVertex3f( -1.0, -0.5, 0.4 );
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glVertex3f( -1.0, 0.5, -0.4 ); glVertex3f( -1.0, 0.5, 0.4 );
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glEnd();
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glEndList();
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return list;
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}
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void reshape( int width, int height )
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{
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glViewport(0, 0, (GLint)width, (GLint)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, 15.0 );
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glMatrixMode(GL_MODELVIEW);
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}
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GLenum key(int k, GLenum mask)
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{
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switch (k) {
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case KEY_ESCAPE:
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exit(0);
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}
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return GL_FALSE;
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}
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void draw( void )
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{
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glClear( GL_COLOR_BUFFER_BIT );
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glPushMatrix();
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glTranslatef( 0.0, 0.0, -10.0 );
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glScalef( Scale, Scale, Scale );
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if (Xstep) {
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glRotatef( Xrot, 1.0, 0.0, 0.0 );
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}
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else if (Ystep) {
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glRotatef( Yrot, 0.0, 1.0, 0.0 );
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}
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else {
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glRotatef( Zrot, 0.0, 0.0, 1.0 );
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}
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glCallList( Object );
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glPopMatrix();
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glFlush();
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tkSwapBuffers();
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}
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void idle( void )
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{
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Xrot += Xstep;
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Yrot += Ystep;
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Zrot += Zstep;
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if (Xrot>=360.0) {
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Xrot = Xstep = 0.0;
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Ystep = Step;
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}
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else if (Yrot>=360.0) {
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Yrot = Ystep = 0.0;
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Zstep = Step;
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}
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else if (Zrot>=360.0) {
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Zrot = Zstep = 0.0;
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Xstep = Step;
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}
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draw();
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}
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void init(void)
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{
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Object = make_object();
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glCullFace( GL_BACK );
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/* glEnable( GL_CULL_FACE );*/
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glDisable( GL_DITHER );
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glShadeModel( GL_FLAT );
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/* glEnable( GL_DEPTH_TEST ); */
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Xrot = Yrot = Zrot = 0.0;
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Xstep = Step;
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Ystep = Zstep = 0.0;
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}
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int main( int argc, char *argv[] )
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{
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return ui_loop(argc, argv, "spin");
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}
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