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Question by $$anonymous$$ · Aug 01, 2020 at 11:25 AM · 2dcollision detectionlinerendererpolygoncollider2d

LineRenderer Collisions (that support texture alpha)

Hi, I made a system to draw brush strokes (LineRenderers w/ some width + stretched texture) that generate a PolygonCollider2D for them.

The texture is a brush that has arbitrary alpha along it's edges: Brush texture


My problem is that the PolygonCollider2D now matches the LineRenderer mesh, but since the texture has alpha - the collision box is too big (A bit hard to see cause of the background, but the collider is noticably wider at the end, as well as somewhat wider at the start)

Collider too thick


I've searched for solutions to similar problems but it seems that all of them either use LineRenderers without textures/alpha, or talk about SpriteRenderer collisions and automatic PolygonCollider2D generation (doesn't work with LineRenderer, I checked)

brush-blob.png (15.0 kB)
collider-thickness.jpg (66.0 kB)
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