opengl.c template for mac, linux and windows.

opengl.c

#ifdef __APPLE__
	#define GL_SILENCE_DEPRECATION
	#include <GLUT/glut.h>
#else
  #ifdef _WIN32
    #include <window.h>
  #endif
// linux and win
  #include <GL/glut.h>
#endif
#include <stdio.h>

void init() {
	glutInitWindowSize(500, 500);
	glutInitWindowPosition(0, 0);
}

void display() {
	// axis 100 wide
	/* gluOrtho2D(-100, 100, -100, 100); */
	// set the bg to black
	glClearColor(0.0, 0.0, 0.0, 1.0);
	glClear(GL_COLOR_BUFFER_BIT);

	// Draw a Red 1x1 Square centered at origin
	/* glBegin(GL_QUADS);              // Each set of 4 vertices form a quad */
	/* glColor3f(1.0, 0.0, 0.0); // Red */
	/* glVertex2f(-0.5, -0.5);    // x, y */
	/* glVertex2f( 0.5, -0.5); */
	/* glVertex2f( 0.5,  0.5); */
	/* glVertex2f(-0.5,  0.5); */
	/* glEnd(); */

	glFlush();  // Render now
}

int main(int argc, char *argv[]) {
	glutInit(&argc, argv);
	// init function
	init();
	// make window
	glutCreateWindow("My First OpenGL Test");
	// call the display function
	glutDisplayFunc(display);
	glutMainLoop();
	return 0;
}