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Comments (3)

gkjohnson avatar gkjohnson commented on June 12, 2024

The highlight mesh and the mesh being selected must have the same transformations for scale, rotation, and position otherwise they will not line up.

from three-mesh-bvh.

jayantpaliwal avatar jayantpaliwal commented on June 12, 2024

Hey @gkjohnson, As per what I got from your previous reply, I have set

highlightMesh = new THREE.Mesh()
	highlightMesh.geometry = mesh.geometry.clone();
	highlightMesh.position = mesh.position.clone();
	highlightMesh.rotation = mesh.rotation.clone();
	highlightMesh.scale = mesh.scale.clone();
	highlightMesh.geometry.drawRange.count = 0;
	highlightMesh.material = new THREE.MeshBasicMaterial({
		opacity: 0.05,
		transparent: true,
		depthWrite: false,
	});
	highlightMesh.material.color.set(0xff9800).convertSRGBToLinear();
	highlightMesh.renderOrder = 1;
	group.add(highlightMesh);

	highlightWireframeMesh = new THREE.Mesh();
	highlightWireframeMesh.geometry = highlightMesh.geometry;
	highlightWireframeMesh.position = mesh.position.clone();
	highlightWireframeMesh.rotation = mesh.rotation.clone();
	highlightWireframeMesh.scale = mesh.scale.clone();
	highlightWireframeMesh.material = new THREE.MeshBasicMaterial({
		opacity: 0.25,
		transparent: true,
		wireframe: true,
		depthWrite: false,
	});
	highlightWireframeMesh.material.color.copy(highlightMesh.material.color);
	highlightWireframeMesh.renderOrder = 2;
	group.add(highlightWireframeMesh);

After setting this, I'm not getting the appropriate results. Can you please tell me if this is the correct way to set the position, rotation, and scale, or is there something else I'm missing?

from three-mesh-bvh.

gkjohnson avatar gkjohnson commented on June 12, 2024
  highlightWireframeMesh.position = mesh.position.clone();
  highlightWireframeMesh.rotation = mesh.rotation.clone();
  highlightWireframeMesh.scale = mesh.scale.clone();

This is not a valid way to modify the position, rotation, or scale of an object in three.js. You need to use the copy function to copy data from the target vectors and rotations.

If you need help understanding the fundamentals of how to manipulate transforms on three.js objects I recommend reading through the three.js docs and asking at the forum

from three-mesh-bvh.

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