Description

In webgpu_compute_particles_rain, if you modify the gui to let the user set rainParticles.count = 0, single sprites will still render periodically on screen. Ideally, we'd want the object to no longer draw to the screen if it's count is set to 0.

To fix this, we always consider the count value when it is defined, rather than clamping it to 1.

getDrawParameters() {
       
	// const instanceCount = geometry.isInstancedBufferGeometry ? geometry.instanceCount : ( object.count > 1 ? object.count : 1 );
       const instanceCount = geometry.isInstancedBufferGeometry ? geometry.instanceCount : ( object.count !== undefined  ? object.count : 1);

}

Now when the object.count value is set to 0, instanceCount will equal 0 and getDrawParameters() will return null, preventing the particles from drawing.

EDIT: I initially found this issue while attempting to port SimonDev's Particle Tutorial over to TSL. Here is the version without the change in RenderObject.

And here's the version with the change:

Reproduction steps

1. Give the user the ability to arbitrarily set rainParticles.count to a range of 0 to maxParticles within the GUI.

Code

// code goes here

Live example

// TBD

Screenshots

No response

Version

r175

Device

Desktop

Browser

Chrome

OS

Windows