trip.three/lib/util/toScreenPosition.js

Three.js addon for Trip

'use strict';

var THREE = require('three');

module.exports = function (width, height, camera, worldCoordinates) {
  worldCoordinates = worldCoordinates.clone();
  var projScreenMat = new THREE.Matrix4();
  projScreenMat.multiplyMatrices(camera.projectionMatrix, camera.matrixWorldInverse);
  worldCoordinates.applyProjection(projScreenMat);
  return {
    x: width * ((worldCoordinates.x + 1) / 2),
    y: height * ((-worldCoordinates.y + 1) / 2)
  };
};