Change Particle texture on the fly

robo

Hi,

I am currently using the Particles example by Dan Shiffman and I would like to change the Particle texture by keypress to a different PNG. As the PNG is loaded n the setup-phase I can't do this there. Is there a way to switch a texture which has already been loaded (maybe in some internal buffer)? Or should I change the code so that I load all images upfront and the try to adapt the Particle system?

Any help is greatly appreciated, maybe someone has already coded a similar thing?

Thanks, Robo

blindfish

Definitely load images up front; or possibly in an event listener if you've got a lot of images - though there may be a noticeable delay whilst each one loads. How you swap images depends on your actual implementation: a condition against a global in Particle or your event handler updating each Particle instance, etc.

robo

Hello blindfish,

thanks for the answer, I thought loading upfront is the best way to go. I am currently stuck at figuring out how to switch a shape, I tried the following:

partSize = random(10,30);
part2 = createShape();
part2.beginShape(QUAD);
part2.noStroke();
part2.texture(sprite);
part2.normal(0, 0, 1);
part2.vertex(-partSize/2, -partSize/2, 0, 0);
part2.vertex(+partSize/2, -partSize/2, sprite.width, 0);
part2.vertex(+partSize/2, +partSize/2, sprite.width, sprite.height);
part2.vertex(-partSize/2, +partSize/2, 0, sprite.height);

part.endShape();


// this line below does not work
part = part2;

It seems that it is not possible to assign a Shape to a new shape. Any suggestions on that?