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Question by Gureen_Ryuu · Jan 24, 2014 at 08:05 AM · spritespritesmaskgenerationcrop

How to crop or mask a sprite to a specific shape?

I'm trying to do a procedural terrain generation. I've managed to make the function to generate the points, and I've been testing/debugging by creating the terrain using a polygon collider on an object.

alt text

Now that it's done, I want to use this shape to crop a large sprite using the shape so that I obtain the shaped terrain. If I have a square terrain sprite, is there any way to crop the top or mask it to the shape of the polygon collider (or the shape of the function I'm using).

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Answer by NivF · Jan 24, 2014 at 10:53 AM

Well, you haven't specifically specified by looking at that screenshot I assume you are talking about a 2D terrain.

If that's the case I believe the best way would be to manually create a 2D polygonal mesh that represents your terrain (very much like the image you have there). Then you can assign a texture to it and assign of UV coordinates.

With X/Y based naive UVs you should get your texture naturally cropped by the mesh edges.

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avatar image Gureen_Ryuu · Jan 24, 2014 at 03:26 PM 0
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I see. Yes, I meant 2D terrain, sorry! I don't have much experiences with $$anonymous$$eshes, I will have to check out how to do a sinus shaped mesh. If you have any info on that it would be very appreciated. :)

avatar image Mattstg · Jul 28, 2016 at 01:53 AM 0
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This seems like excatly what I've been looking for. Im trying to crop a sprite/texture by mesh edges. How excatly do you do this? I've tried searching and have come up with similar things, but not excatly this.

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