Help with edge detection shader

cox

Hi guys,

I've been working on a top down game and I'm trying to achieve this result in unity:



I've reproduced this using ink'n paint shader on 3D'sMax

My attempt with unity toon shader: (note the variable width)



My objective is to have flat shader without any shading, just solid color and fixed width colored outline (darker tone of diffuse color).

The thing is that on all shaders I see at the asset store or forums have very simple outlines, or lines with variable width with poor edge detection.

For a good example of what I want to achieve:

The Return of Obradinn

http://forums.tigsource.com/index.php?topic=40832.msg1024980#msg1024980


can anybody point me where to go with this issue?!

Vailias

This might help: http://docs.unity3d.com/Manual/script-EdgeDetectEffectNormals.html

Edge detection like this is typically called Sobel Edge Detection.

As for the hard coloring and dithering, that's a whole other topic.

echofourpapa

Edge detections works(at a high level) by detecting the differences between colors, so any flat shader will produce good seperation. I've used an approach similar to your example pretty extensively and it works well. Something to be aware of though is that they are opaque image effects, so they render before transparency.