makePerspective method
Implementation
Matrix4 makePerspective(double left, double right, double top, double bottom, double near, double far) {
final te = storage;
final x = 2 * near / (right - left);
final y = 2 * near / (top - bottom);
final a = (right + left) / (right - left);
final b = (top + bottom) / (top - bottom);
final c = -(far + near) / (far - near);
final d = -2 * far * near / (far - near);
te[0] = x;
te[4] = 0;
te[8] = a;
te[12] = 0;
te[1] = 0;
te[5] = y;
te[9] = b;
te[13] = 0;
te[2] = 0;
te[6] = 0;
te[10] = c;
te[14] = d;
te[3] = 0;
te[7] = 0;
te[11] = -1;
te[15] = 0;
return this;
}