[Solved] Get normal of face by rayCast

Phour · January 13, 2019, 8:19pm

Hi,

i am struggling on a very simple problem.
i cast a ray with:
var myray = physics.rayCast(from, to);

i do know how to get the worldhitpoint but what i want is to get the normal of the face the ray is hitting.
How can i accomplish that?

zicklag · January 13, 2019, 8:20pm

Here you go.

github.com

armory3d/armory/blob/51a21042cc688520d1449f0a2161be26140a599a/Sources/armory/logicnode/CastPhysicsRayNode.hx#L31


		var rb = physics.rayCast(vfrom, vto);


		if (from == 0) { // Object
			if (rb != null) return rb.object;
		}
		else if (from == 1) { // Hit
			var hitPointWorld:Vec4 = rb != null ? physics.hitPointWorld : null;
			v.set(hitPointWorld.x, hitPointWorld.y, hitPointWorld.z, 1);
			return v;
		} else { // Normal
			var hitNormalWorld:Vec4 = rb != null ? physics.hitNormalWorld : null;
			v.set(hitNormalWorld.x, hitNormalWorld.y, hitNormalWorld.z, 0);
			return v;
		}
#end
		return null;
	}
}

The “Open Node Source” button can be really useful for stuff like this:

Phour · January 13, 2019, 8:23pm

Damn that was fast. Almost like a chat.
thanks a lot