private Matrix4f getProjectionNormalized(int w, int h) {
// range -1,1 in the narrow axis at z = 0.
Matrix4f m1 = new Matrix4f();
Matrix4f m2 = new Matrix4f();
if (w > h) {
float aspect = ((float) w) / h;
m1.loadFrustum(-aspect, aspect, -1, 1, 1, 100);
} else {
float aspect = ((float) h) / w;
m1.loadFrustum(-1, 1, -aspect, aspect, 1, 100);
}
m2.loadRotate(180, 0, 1, 0);
m1.loadMultiply(m1, m2);
m2.loadScale(-1, 1, 1);
m1.loadMultiply(m1, m2);
m2.loadTranslate(0, 0, 1);
m1.loadMultiply(m1, m2);
return m1;
}
