generate method

@override dynamic generate([ dynamic builder, dynamic output ])

Implementation

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

  var outputNode = null;

  if (scope == PositionNode.GEOMETRY) {
    outputNode = new AttributeNode('position', 'vec3');
  } else if (scope == PositionNode.LOCAL) {
    outputNode = new VaryNode(new PositionNode(PositionNode.GEOMETRY));
  } else if (scope == PositionNode.WORLD) {
    var vertexPositionNode = new MathNode(
        MathNode.TRANSFORM_DIRECTION,
        new ModelNode(ModelNode.WORLD_MATRIX),
        new PositionNode(PositionNode.LOCAL));
    outputNode = new VaryNode(vertexPositionNode);
  } else if (scope == PositionNode.VIEW) {
    var vertexPositionNode = new OperatorNode(
        '*',
        new ModelNode(ModelNode.VIEW_MATRIX),
        new PositionNode(PositionNode.LOCAL));
    outputNode = new VaryNode(vertexPositionNode);
  } else if (scope == PositionNode.VIEW_DIRECTION) {
    var vertexPositionNode =
        new MathNode(MathNode.NEGATE, new PositionNode(PositionNode.VIEW));
    outputNode =
        new MathNode(MathNode.NORMALIZE, new VaryNode(vertexPositionNode));
  }

  return outputNode.build(builder, this.getNodeType(builder));
}