DragoniteSpam

varying vec2 v_vTexcoord;
varying vec4 v_vColour;

#pragma include("lighting.f.xsh")
/// https://github.com/GameMakerDiscord/Xpanda

uniform float lightBuckets;

varying vec4 v_lightColour;

DragoniteSpam

/// @param xx
/// @param yy
/// @param zz
/// @param view_mat
/// @param proj_mat
/*
    Transforms a 3D world-space coordinate to a 2D window-space coordinate. Returns an array of the following format:
    [xx, yy]
    Returns [-1, -1] if the 3D point is not in view
   

DragoniteSpam

/// @description convert_2d_to_3d(x, y, view_mat, proj_mat)
/// @param x
/// @param y
/// @param view_mat
/// @param proj_mat
/*
Transforms a 2D coordinate (in window space) to a 3D vector.
Returns an array of the following format:
[dx, dy, dz, ox, oy, oz]
where [dx, dy, dz] is the direction vector and [ox, oy, oz] is the origin of the ray.

DragoniteSpam

// I haven't used this in anything yet, but TheSnidr on the GameMaker discord posted
// this in response to a question about camera roll. He's usually pretty good at 3D
// math so I'm going to assume it works. "roll" is the angle around the direction the
// camera is looking at. Use for the view matrix.
var c = dcos(roll);
var s = dsin(roll) / max(math_get_epsilon(), sqrt(sqr(xdir) + sqr(ydir)));
matrix_build_lookat(x, y, z, x + xdir, y + ydir, z + zdir, ydir * s, -xdir * s, c);

DragoniteSpam

function triangle_normal(x1, y1, z1, x2, y2, z2, x3, y3, z3) {
    gml_pragma("forceinline");
    var v1x = x2 - x1;
    var v1y = y2 - y1;
    var v1z = z2 - z1;
    var v2x = x3 - x1;
    var v2y = y3 - y1;
    var v2z = z3 - z1;
    var cx = v1y * v2z - v1z * v2y;
    var cy = -v1x * v2z + v1z * v2x;