three.js updating camera matrix world

Question

I'm trying to make the camera project a cube into an image of a cube. I calculate the camera's internal and external parameters. I update the camera internal matrix by manually changing the projectionmatrix. the code is:

camera.projectionMatrix.elements[i]= value;

but for some reeason when i want to update its external parameters, by updating either camera.matrixWorld or camera.matrixWorldInverse nothing happens. i use this code:

 camera.matrixWorldInverse.elements[i]= value;
 camera.matrixWorld.elements[i]= value;

if i update both still nothing happens. what am I doing wrong? how can I update the camera's external parameters?

Answer 1

Your values may be getting overwritten. Try this:

camera.matrixAutoUpdate = false;

Answer 2

更改世界矩阵后尝试scene.updateMatrixWorld() 。