Projects a 3D world point into 2D window space.
var mat4 = require('gl-mat4') var project = require('camera-project') //projection * view matrix var combinedProjView = mat4.multiply(, projection, view) //viewport bounds var viewport = [x, y, width, height] //3D world point var point = [0, -1, 2.5] //vec4 output var output =  project(output, point, viewport, combinedProjView)
z component contains the window space depth, and
w is the value of
(1 / clip.w). Assumes depth range is 0 to 1.
Projects the 3D
point into window space using the
viewport bounds (screen x, y, width, height) and
combined matrix (result of multiplying
projection * view matrices).
The result is stored in
out and returned.
MIT, see LICENSE.md for details.