Help Marquee tool

[josemendez]

Would you tell me how to project particle positions using Camera.WorldToScreenPoint? It is not related to Obi? In the documentation, I have to assign particle to target.

Projecting a position is not related to Obi, since a position is a position regardless of where it came from. Obi gives you access to all per-particle properties (positions, velocities, masses, etc), and the documentation explains how to get/set them, but what you do with them is up to you, and largely not related to the engine itself.

Simply iterate over all particles projecting their current position, like this:

Code:

for (int i = 0; i < actor.positions.Length; ++i){
            int indexInSolver = actor.particleIndices[i];
            Vector3 projectedPos = camera.WorldToScreenPoint(solver.positions[indexInSolver]);
        }