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changing offset of a p2 shape without reapplying the whole shape?


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"shapeOffsets" is an array of points which describes each shape's offset from the sprite, as far as I know.

// pseudo codeshapeOffsets = [[shape1_x, shape1_y], [shape2_x, shape2_y]];

When you want to change the shape's offset without creating new geometry you need to change these offsets, imho.

Otherwise just ask @schteppe, he's the creator of P2.js.

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  • 2 months later...

As far as I can tell, you need to supply shapeOffsets with a p2 vec2, and you may need to update the AABB and bounding radius after you change the offset. I haven't tested this myself, but this should be the correct way:


var myOffset = p2.vec2.fromValues(-1, -1); // this creates a vector that points 20 px to the right and 20 px downp2body.shapeOffsets[0] = myOffset; // this assigns the vector to the first shape's shapeOffset. note that this is a property of the p2body (so phaserbody.data)p2body.updateAABB();p2body.updateBoundingRadius();
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