my3dcube.c

#include "GLUT/glut.h"
#include "stdlib.h"

#define ESC 27

#define BLACK	0.0f, 0.0f, 0.0f, 0.0f
#define GREEN	0.0f, 1.0f, 0.0f
#define ORANGE	1.0f, 0.5f, 0.0f
#define RED		1.0f, 0.0f, 0.0f
#define YELLOW	1.0f, 1.0f, 0.0f
#define BLUE	0.0f, 0.0f, 1.0f
#define VIOLET	1.0f, 0.0f, 1.0f

int window;

float rotation = 0.0f;

void InitGL(int width, int height) {
	glClearColor(BLACK);
	glClearDepth(1.0);
	glDepthFunc(GL_LESS);
	glEnable(GL_DEPTH_TEST);
	glShadeModel(GL_SMOOTH);

	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();

	gluPerspective(45.0f, (GLfloat)width / (GLfloat)height, 0.1f, 100.0f);

	glMatrixMode(GL_MODELVIEW);
}

/* The main drawing function. */
void DrawGLScene() {
	glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
	glLoadIdentity();

	glTranslatef(-1.5f, 0.0f, -6.0f);

	glLoadIdentity();				// make sure we're no longer rotated.

	glTranslatef(1.5f, 0.0f, -7.0f);

	glRotatef(rotation, 1.0f, 1.0f, 1.0f);

	glBegin(GL_QUADS);

	// top
	glColor3f(BLUE);
	glVertex3f( 1.0f, 1.0f,-1.0f);		// Top Right Of The Quad (Top)
	glVertex3f(-1.0f, 1.0f,-1.0f);		// Top Left Of The Quad (Top)
	glVertex3f(-1.0f, 1.0f, 1.0f);		// Bottom Left Of The Quad (Top)
	glVertex3f( 1.0f, 1.0f, 1.0f);		// Bottom Right Of The Quad (Top)

	// bottom
	glColor3f(ORANGE);
	glVertex3f( 1.0f,-1.0f, 1.0f);		// Top Right Of The Quad (Bottom)
	glVertex3f(-1.0f,-1.0f, 1.0f);		// Top Left Of The Quad (Bottom)
	glVertex3f(-1.0f,-1.0f,-1.0f);		// Bottom Left Of The Quad (Bottom)
	glVertex3f( 1.0f,-1.0f,-1.0f);		// Bottom Right Of The Quad (Bottom)

	// front
	glColor3f(RED);
	glVertex3f( 1.0f, 1.0f, 1.0f);		// Top Right Of The Quad (Front)
	glVertex3f(-1.0f, 1.0f, 1.0f);		// Top Left Of The Quad (Front)
	glVertex3f(-1.0f,-1.0f, 1.0f);		// Bottom Left Of The Quad (Front)
	glVertex3f( 1.0f,-1.0f, 1.0f);		// Bottom Right Of The Quad (Front)

	// back
	glColor3f(YELLOW);
	glVertex3f( 1.0f,-1.0f,-1.0f);		// Top Right Of The Quad (Back)
	glVertex3f(-1.0f,-1.0f,-1.0f);		// Top Left Of The Quad (Back)
	glVertex3f(-1.0f, 1.0f,-1.0f);		// Bottom Left Of The Quad (Back)
	glVertex3f( 1.0f, 1.0f,-1.0f);		// Bottom Right Of The Quad (Back)

	// left
	glColor3f(GREEN);
	glVertex3f(-1.0f, 1.0f, 1.0f);		// Top Right Of The Quad (Left)
	glVertex3f(-1.0f, 1.0f,-1.0f);		// Top Left Of The Quad (Left)
	glVertex3f(-1.0f,-1.0f,-1.0f);		// Bottom Left Of The Quad (Left)
	glVertex3f(-1.0f,-1.0f, 1.0f);		// Bottom Right Of The Quad (Left)

	// right
	glColor3f(VIOLET);
	glVertex3f( 1.0f, 1.0f,-1.0f);			// Top Right Of The Quad (Right)
	glVertex3f( 1.0f, 1.0f, 1.0f);		// Top Left Of The Quad (Right)
	glVertex3f( 1.0f,-1.0f, 1.0f);		// Bottom Left Of The Quad (Right)
	glVertex3f( 1.0f,-1.0f,-1.0f);		// Bottom Right Of The Quad (Right)

	glEnd();

	rotation += 0.5f;

	glutSwapBuffers();
}

void keyPressed(unsigned char key, int x, int y) {
	if (key == ESC) {
		glutDestroyWindow(window);
		exit(0);
	}
}

int main(int argc, char **argv) {
	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_ALPHA | GLUT_DEPTH);
	glutInitWindowSize(640, 480);
	glutInitWindowPosition(300, 300);

	window = glutCreateWindow("Cube");

	glutDisplayFunc(&DrawGLScene);
	glutIdleFunc(&DrawGLScene);

	glutKeyboardFunc(&keyPressed);

	InitGL(640, 480);

	glutMainLoop();

	return 1;
}