78 lines
1.5 KiB
C
78 lines
1.5 KiB
C
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#include <GL/gl.h>
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#include <GL/glu.h>
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#include <GL/glut.h>
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float r = 0.0;
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void init(void)
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{
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glClearColor (0.0, 0.0, 0.0, 0.0);
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glShadeModel (GL_FLAT);
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}
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void idle(void)
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{
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r += 0.02;
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glutPostRedisplay();
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}
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void drawcubes(int level, double size)
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{
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glutWireCube(size);
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if (!level)
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return;
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double a = 0.0;
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int i;
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for (i = 0; i < 4; i++)
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{
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glPushMatrix();
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glRotatef(a, 0.0, 1.0, 0.0);
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glTranslatef(size * 0.375, size * 0.625, size * 0.375);
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glRotatef(r, 0.0, 1.0, 0.0);
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drawcubes(level - 1, size * 0.25);
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glPopMatrix();
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a += 90.0;
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}
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}
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void display(void)
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{
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glClear (GL_COLOR_BUFFER_BIT);
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glColor3f (1.0, 1.0, 1.0);
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glLoadIdentity (); /* clear the matrix */
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/* viewing transformation */
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glTranslatef(0.0, -1.0, -5.0);
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glRotatef(40.0, 1.0, 0.0, 0.0);
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glRotatef(r, 0.0, 1.0, 0.0);
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drawcubes(4, 2.0);
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glFlush ();
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glutSwapBuffers();
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}
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void reshape (int w, int h)
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{
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glViewport (0, 0, (GLsizei) w, (GLsizei) h);
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glMatrixMode (GL_PROJECTION);
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glLoadIdentity ();
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gluPerspective(60.0, 4.0/3.0, 1.5, 20.0);
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glMatrixMode (GL_MODELVIEW);
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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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glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGB);
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glutInitWindowSize (800, 600);
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glutInitWindowPosition (-1, -1);
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glutCreateWindow (argv[0]);
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init ();
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glutDisplayFunc(display);
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glutReshapeFunc(reshape);
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glutIdleFunc(idle);
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glutMainLoop();
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return 0;
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}
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