How do i do dolly/Hitchcock/Vertigo zoom using perspective camera?

[looeee]

You could try this - put in the distance of your object (in world space) to the camera as the z-depth to get the width of the scene at that distance. Then use that width in the calculation.

Functions to calculate the visible width / height at a given z-depth from a perspective camera

These two functions will give you the visible height and width in your scene at a given distance from a PerspectiveCamera. It’s useful if you want to create an object that is the full width / height of the scene, or want to place objects at screen edges etc. Here’s the code (ES6): const visibleHeightAtZDepth = ( depth, camera ) => { // compensate for cameras not positioned at z=0 const cameraOffset = camera.position.z; if ( depth < cameraOffset ) depth -= cameraOffset; else depth += c…