setFromProjectionMatrix method

Frustum setFromProjectionMatrix(
  1. Matrix4 m
)

Implementation

Frustum setFromProjectionMatrix(Matrix4 m) {
  var planes = this.planes;
  var me = m.elements;
  var me0 = me[0], me1 = me[1], me2 = me[2], me3 = me[3];
  var me4 = me[4], me5 = me[5], me6 = me[6], me7 = me[7];
  var me8 = me[8], me9 = me[9], me10 = me[10], me11 = me[11];
  var me12 = me[12], me13 = me[13], me14 = me[14], me15 = me[15];

  planes[0].setComponents(me3 - me0, me7 - me4, me11 - me8, me15 - me12).normalize();
  planes[1].setComponents(me3 + me0, me7 + me4, me11 + me8, me15 + me12).normalize();
  planes[2].setComponents(me3 + me1, me7 + me5, me11 + me9, me15 + me13).normalize();
  planes[3].setComponents(me3 - me1, me7 - me5, me11 - me9, me15 - me13).normalize();
  planes[4].setComponents(me3 - me2, me7 - me6, me11 - me10, me15 - me14).normalize();
  planes[5].setComponents(me3 + me2, me7 + me6, me11 + me10, me15 + me14).normalize();

  return this;
}