How to generate textures to fit around shapes?

Question

I have a randomly generated series of EdgeShapes, as shown here:

enter image description here

My question is, how can I fill that bottom area with a texture in order to make it look like the ground?

score 0 · Accepted Answer · answered Feb 15 '12 at 15:55

0

As suggested by someone in IRC:

Create a polyon using OpenGL and then map it 1:1 onto the Box2D shape and texture the polygon.

answered Feb 15 '12 at 15:55

Derek

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Hi! I will upvote and share if you could provide an example on this. – Kimi Feb 17 '12 at 09:01
I'm not to sure how to do it myself, but I would create an OpenGL shape at the same time as you create the box2D shape and give it the same variables. – Derek Feb 19 '12 at 15:52

score -1 · Answer 2 · answered Jan 09 '12 at 08:44

From ancient memory, and looking at the code, this can't be done with edge shapes. You can chain them together, but even then there is no self-colision, which would allow the shape to overlap itself, and be . . . what? There are no normals created, nor centroid.

This is just a guess -- it has been a while since I used box2d -- but can you create a polygon instead? You would first create the N number of points in an array, and use that array as y-values along the top to simulate ground. Then you would make each point's y-value equal it's neighboring (left or right) point's y-value over time. As the points reach the end, they are moved off the array, and a new value is moved onto the other end of the array.
Can this be done, and would this adversely affect the contact points with other objects?

How to generate textures to fit around shapes?

2 Answers2