Camera Parallel Projection Question

Troubleshooting
1

Here is the only camera related code in my test application.

private void setupCamera() {
    
    flyCam.setEnabled(false);
    
    cam.setParallelProjection(true);
    
    cam.setLocation(new Vector3f(0f,147f,0f));
    
    cam.lookAt(new Vector3f(0f,0f,0f), Vector3f.UNIT_X);
    
    cam.update();
    
}

With parallel projection set to false.

parallel-false.png802×627 18.1 KB

With parallel projection set to true.

parallel-true.png802×627 49.6 KB

My goal is to have the Textured Quad positioned as in the top screen, viewed through a parallel projection camera - a top down view without perspective.

Could someone help me understand what I am doing wrong here?

Thank you :slight_smile:

2

Parallell projection works differently from a normal camera since it doesn’t have perspective. Look at TestParallelProjection.java in the examples project to get an idea on how it works. I suspect TestMultiViews will be of interest as well.

3

Also, depending on what you actually want to do, the gui bucket is already in parallel projection in screen space.

4

…is this 2D game ? If so, you can just use Picture to keep everything as you want, regardless screen size/camera settings (rescale picture with proper aspect ratio)…