Sprites Collisions

[Michal_Mihalik]

Hi,

what’s the easiest way to check collisions between sprites?
I know, I can do my own way like create fake invisible meshes, which have collision check implemented inside.

But is there some easier, more generic way?

My example: https://playground.babylonjs.com/#SCX9EZ#2

Thanks,
Michal.

[alexchuber]

Using an invisible mesh and attaching a physics body to it is likely the best way. You’re not alone in wondering this, though-- it looks like these guys also wound up using some sort of invisible mesh for their 2D collisions

2D collision in 3D space

You could project the 8 vertices of the bounding box and take the min/max of x/y for a crude 2D bounding rectangle. If you need more precision and pixel perfect collision detection, then I don’t see an easy way to do that… I think the best way would still be to have your objects in 3D with correct z positionning for the regular collision system to work. If that is a problem for rendering order that the z-buffer can’t handle, maybe split some objects to dispatch each parts in different rendering …

SpriteMap and collision

Let me find the example with a player on it, it has some hit stuff going! Give me a bit here. https://www.babylonjs-playground.com/#FERKRD#3

Seeking suggestions on sprites and collision

Hi @Jieling_Yang I did a quick test with physics and a sprite: https://www.babylonjs-playground.com/#VGY2FA#1 I attached the sprite to the physics object using scene.registerBeforeRender. The main issues I see are: difficulties to tweak the physics to get the exact controls you want (friction, momentum,…) carrefully set the collision volume In my PG, you can change player1Mat.alpha = 0.5; to see the collision sphere (might help you later for debugging)