Justinfront

package;

    import kha.FastFloat;
    import kha.Framebuffer;
    import kha.math.FastMatrix3;
    import kha.Scheduler;
    import kha.System;
    import js.Lib;
    import js.html.ImageElement;
    import js.html.Event;

Justinfront

function turn (X, Y) {
	// for the math, see http://www.texpaste.com/n/ev3443eo
        var
            X2 = X*X, Y2 = Y*Y,
            q = 1 + X2 + Y2,
            s = 1 - X2 - Y2,
            r2 = 1/(q*q), s2 = s*s,
            A = (s2 + 4*(Y2 - X2))*r2, B = -8*X*Y*r2, C = 4*s*X*r2,
                D = (s2 + 4*(X2 - Y2))*r2, E = 4*s*Y*r2,
                    F = (s2 - 4*(X2 + Y2))*r2;

Justinfront

lua - Justin Donaldson
https://t.co/lEy2jAfLpP
externs Andy Li
https://t.co/K8bqK3OkPK
JTrans - 
https://t.co/YvWMLnijmG
HaxeUI - Ian
https://t.co/XbKaQSV5Jj
Pistahx - Emmanuel
https://t.co/PdS38n2kz8