THREEDEE

eastern flames/scripts/c_2dto3d/c_2dto3d.gml

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+// Script assets have changed for v2.3.0 see
+// https://help.yoyogames.com/hc/en-us/articles/360005277377 for more information
+	/// @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.
+	Works for both orthographic and perspective projections.
+	Script created by TheSnidr
+	(slightly modified by @dragonitespam)
+	*/
+function c_2dto3d(_x,_y,V = ARTICULATOR.getView(), P = ARTICULATOR.getProj()){	
+	var mx = 2 * (_x / window_get_width() - .5) / P[0];
+	var my = 2 * (_y / window_get_height() - .5) / P[5];
+	var camX = - (V[12] * V[0] + V[13] * V[1] + V[14] * V[2]);
+	var camY = - (V[12] * V[4] + V[13] * V[5] + V[14] * V[6]);
+	var camZ = - (V[12] * V[8] + V[13] * V[9] + V[14] * V[10]);
+	var theVar;
+	if (P[15] == 0)
+	{    //This is a perspective projection
+	    theVar = [V[2]  + mx * V[0] + my * V[1],
+	            V[6]  + mx * V[4] + my * V[5],
+	            V[10] + mx * V[8] + my * V[9],
+	            camX,
+	            camY,
+	            camZ];
+	}
+	else
+	{    //This is an ortho projection
+	    theVar = [V[2],
+	            V[6],
+	            V[10],
+	            camX + mx * V[0] + my * V[1],
+	            camY + mx * V[4] + my * V[5],
+	            camZ + mx * V[8] + my * V[9]];
+	}
+	var s2w = theVar;
+	var fx = s2w[0] * s2w[5] / -s2w[2] + s2w[3];
+	var fy = s2w[1] * s2w[5] / -s2w[2] + s2w[4];
+	return {x:fx,y:fy};
+}

eastern flames/scripts/c_2dto3d/c_2dto3d.yy

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+{
+  "isDnD": false,
+  "isCompatibility": false,
+  "parent": {
+    "name": "convenience",
+    "path": "folders/Scripts/util/convenience.yy",
+  },
+  "resourceVersion": "1.0",
+  "name": "c_2dto3d",
+  "tags": [],
+  "resourceType": "GMScript",
+}