I create a rectangle with cut or rounded corners using ExtrudeGeometry and after rotating its mesh I get a bounding box larger than this geometry. If I rotate the geometry itself, the problem disappears, but when I group several of these geometries and rotate this group, the problem occurs again. I …

I found a solution. You should modify “expandByObject” method of Box3 class like this: expandByObject(object) { object.updateWorldMatrix(false, false); const geometry = object.geometry; if (geometry !== undefined) { object.updateWorldMatrix(true, false); geometry.computeBoundingBox(object.m…

is this available as a patch? being considered for inclusion? is this an accurate summary of the patch? for expandByObject(), it’s extracting only position from object.matrixWorld for computeBoundingBox(), adds optional matrix parameter to morph position

I patched my source to use this workaround and: it does fix bounding box computation but it also breaks ray intersections

I was looking for the suggestions like this i am trying something like this can anyone tell me with some extra suggestions i had several issues .

Here is a simplified implementation that works without modifying THREE core libs. Provided an empty THREE.Box3 and an object, this function will compute the proper bounding box in world coordinates. It’s more expensive than the core implementation because it requires cloning geometries and applying …

Thank you so much! Your function does the trick for me. I spent half a day trying to figure out why the bounding box is calculated incorrectly. I appreciate it!

Bounding box bigger than concave object (ExtrudeGeometry)

Questions

s0a January 2, 2022, 12:49am 4

I patched my source to use this workaround and:

it does fix bounding box computation
but it also breaks ray intersections

Invalid bounds generated for some orientations

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Bounding box bigger than concave object (ExtrudeGeometry)

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