# FPS-like camera controls

From JPCT

### FPS-like camera controls

A first person shooter like camera movement is a common thing. Here's some more or less pseudo code to get you started:

This simple code implements a fps-like camera rotation without any limits when looking up/down, i.e. you can turn upside-down with this code:

int dx = <mouse delta x>; int dy = <mouse delta y>; if (dx!=0) { camera.rotateAxis(camera.getYAxis(), dx / 500f); } if (dy!=0) { camera.rotateX(dy / 500f); }

If you want to limit the up/down rotation, something like this may help:

float xAngle=0; // some class attribute .... int dx = <mouse delta x>; int dy = <mouse delta y>; if (dx!=0) { camera.rotateAxis(camera.getYAxis(), dx / 500f); } if ((dy > 0 && xAngle < Math.PI / 4.2) || (dy < 0 && xAngle > -Math.PI / 4.2)) { float t=dy/500f rot.rotateX(t); xAngle += t; }