Three.js - billboard effect, maintain orientation after camera pans
I have a plane geometry that is always set to face the camera via: plane.lookAt(camera.position); in the update loop. I am using OrbitControls to control the camera. When rotating or zooming the scene, the plane continues to face the camera as expected. However, after panning the scene, while the plane continues to face the camera, rotating the camera appears to rotate the plane as well, so that f
Constructing a Billboard Matrix
Billboards are an important part of 3D graphics, especially for use as user interface elements. Unfortunately, detailed information on how to construct them is a little hard to find, so I have derived the billboard matrix from scratch. In case anyone else is looking for this information, the derivation is as follows: Let us assume a standard, row-major 4×4 transformation matrix, with the fields na
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