# glu-sys
Raw GLU and GL Rust bindings

This crate doesn't handle windowing, it can be used with other crates which handle windowing and gl contexts to do raw opengl calls.

```rust
fn draw_triangle() {
    use glu_sys::*;
    unsafe {
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
        glMatrixMode(GL_PROJECTION);
        glLoadIdentity();
        glViewport(0, 0, W, H);
        gluPerspective(45.0, (W as f32 / H as f32).into(), 1.0, 10.0);
        glTranslatef(0.0, 0.0, -5.0);
        glMatrixMode(GL_MODELVIEW);
        glLoadIdentity();
        glRotatef(0.0, 1.0, 1.0, 0.0);
        glColor3f(1.0, 0.0, 0.0);
        glBegin(GL_POLYGON);
        glVertex3f(0.0, 1.0, 0.0);
        glVertex3f(1.0, -1.0, 1.0);
        glVertex3f(-1.0, -1.0, 1.0);
        glEnd();
        glColor3f(0.0, 1.0, 0.0);
        glBegin(GL_POLYGON);
        glVertex3f(0.0, 1.0, 0.0);
        glVertex3f(0.0, -1.0, -1.0);
        glVertex3f(1.0, -1.0, 1.0);
        glEnd();
        glColor3f(0.0, 0.0, 1.0);
        glBegin(GL_POLYGON);
        glVertex3f(0.0, 1.0, 0.0);
        glVertex3f(-1.0, -1.0, 1.0);
        glVertex3f(0.0, -1.0, -1.0);
        glEnd();
        glColor3f(1.0, 0.0, 0.0);
        glBegin(GL_POLYGON);
        glVertex3f(1.0, -1.0, 1.0);
        glVertex3f(0.0, -1.0, -1.0);
        glVertex3f(-1.0, -1.0, 1.0);
        glEnd();
        glLoadIdentity();
        glRasterPos2f(-3.0, -2.0);
    }
}
```

Full example using the fltk crate [here](https://github.com/MoAlyousef/fltk-rs-demos/blob/master/opengl/src/main.rs).