* fix PIP function

[sonzqn]

Hello I made some change in 'pointInConvex' functions:

• don't transform each vertex, but transform the particle position to convex-local instead
• fix wrong check for some shape (e.g: var vertices = [[-0.8219027777777776,-0.7928944444444443],[-0.4931416666666666,-1.2086805555555555],[-0.16438055555555556,-1.2473583333333331],[0.16438055555555556,-1.2763666666666664],[0.3094222222222222,-1.2086805555555555],[0.4931416666666666,-0.783225],[0.5221499999999999,-0.24173611111111107],[0.7252083333333333,0.24173611111111107],[0.8219027777777776,0.29975277777777776],[0.937936111111111,0.7252083333333333],[0.8219027777777776,0.9089277777777777],[0.4931416666666666,0.9862833333333332],[0.26107499999999995,1.2086805555555555],[0.16438055555555556,1.2473583333333331],[-0.16438055555555556,1.1023166666666666],[-0.4931416666666666,1.1603333333333332],[-0.8219027777777776,0.9572749999999999],[-0.7445472222222221,0.7252083333333333],[-0.7155388888888888,0.24173611111111107],[-0.6091749999999999,-0.24173611111111107],[-0.937936111111111,-0.7252083333333333]];)

Please review :) Thank you!

[schteppe]

Hello, thanks for the PR, but I think you've added a point-in-polygon check instead of a point-in-convex. If the shape is convex, one can bail out early instead of checking all edges. If the polygon is an arbitrary polygon, then all edges need to be checked.