How can I stop raindrops from falling?

Questions
1

Use ParticleHelper to simulate a rain scenario, but some places don’t want it to keep falling, is there any way to achieve this?

[PG there] (https://playground.babylonjs.com/#XQ8H3C#73)

How to achieve the function of this green plane like an umbrella?

In other words, I need this green plane to block the raindrops on top.

Maybe something like this

sorry ,my English is really poor

2

Hello :slight_smile:

You can edit the update function, and add a ray pick upward. If it hits, it mean the particle just went though your umbrella, and then you recycle it.

// Which mesh should act as umbrella
function predicate(mesh) {
    return mesh == plane;
}

// Edit update function
const old = rainFall.updateFunction;
rainFall.updateFunction = function(particles) {
    old(particles);
    for (var index = 0; index < particles.length; index++) {
        var particle = particles[index];
        var ray = new BABYLON.Ray(particle.position, new BABYLON.Vector3(0,1,0), 10.0);
        var pickInfo = scene.pickWithRay(ray, predicate);
        if (pickInfo.hit) {
            rainFall.recycleParticle(particle);
            continue;
        }
    }
};

PG applying this to the fall system, but you would do the same for splash, I guess :

5 Likes
3

Your answers were so perfect and quick, that’s why I love babylonjs! Thank you again

3 Likes