Function projectVertexTo

assets/js/block_ninja.js:509–514

(v, target)

// 3D projection on a single vertex.
// Mutates a secondary target vertex.
const projectVertexTo = (v, target) => {
	const focalLength = cameraDistance * sceneScale;
	const depth = focalLength / (cameraDistance - v.z);
	target.x = v.x * depth;
	target.y = v.y * depth;
};