generate method

dynamic generate([ dynamic builder, dynamic output ])

Implementation

generate([builder, output]) {
  var scope = this.scope;

  var outputNode = null;

  if (scope == NormalNode.GEOMETRY) {
    outputNode = new AttributeNode('normal', 'vec3');
  } else if (scope == NormalNode.LOCAL) {
    outputNode = new VaryNode(new NormalNode(NormalNode.GEOMETRY));
  } else if (scope == NormalNode.VIEW) {
    var vertexNormalNode = new OperatorNode(
        '*',
        new ModelNode(ModelNode.NORMAL_MATRIX),
        new NormalNode(NormalNode.LOCAL));
    outputNode =
        new MathNode(MathNode.NORMALIZE, new VaryNode(vertexNormalNode));
  } else if (scope == NormalNode.WORLD) {
    // To use INVERSE_TRANSFORM_DIRECTION only inverse the param order like this: MathNode( ..., Vector, Matrix );
    var vertexNormalNode = new MathNode(
        MathNode.TRANSFORM_DIRECTION,
        new NormalNode(NormalNode.VIEW),
        new CameraNode(CameraNode.VIEW_MATRIX));
    outputNode =
        new MathNode(MathNode.NORMALIZE, new VaryNode(vertexNormalNode));
  }

  return outputNode.build(builder);
}