[BUG] ShadowCasting - Directional Light "direction" parameter may not be straight

[Dinkelborg]

Hi,

I basically spend all day trying to make a very simple scene with a spinning box that simply casts a shadow >> http://playground.babylonjs.com/#1WTS3Q

while doing so I think I found a bug, my original plan was to have a light source pointing straight down so I set the directional lights target parameter to a Vector(0,-1,0) as it is also shown in this example in the tutorials

Quote

var light0 = new BABYLON.DirectionalLight("Dir0", new BABYLON.Vector3(0, -1, 0), scene);light0.diffuse = new BABYLON.Color3(1, 0, 0);light0.specular = new BABYLON.Color3(1, 1, 1);

 

if you look through the source-code of the playground demo I linked above and go and find line 28:

    dirLight = new BABYLON.DirectionalLight("dirLight", new BABYLON.Vector3(0.1, -1, 0), scene);

this was the solution I was searching for hours, if you change that exact line to:
 

dirLight = new BABYLON.DirectionalLight("dirLight", new BABYLON.Vector3(0, -1, 0), scene);

and then press 'RUN' again , you will notice that the shadow will no longer be visible.

 

...Am I overlooking something very basic or is this an actual issue? I am just learning Babylon, so please let me know if I made a stupid mistake

[GameMonetize]

You're not stupid at all and I should add some security system for that. When dealing with projection we cannot have a perfectly perpendicular vector because this leads to division by zero. You found by yourself the right solution.

 

Congratz