#include <GL/glut.h>
void render(void);
void main(int argc, char **argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DEPTH | GLUT_SINGLE | GLUT_RGBA);
glutInitWindowPosition(100,100);
glutInitWindowSize(640,480);
glutCreateWindow("first class");
glutDisplayFunc(render);
glutMainLoop();
}
void render(void)
{
glClearColor(0.0,0.0,0.0,0.0);
glClear(GL_COLOR_BUFFER_BIT);
glBegin(GL_TRIANGLE......
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