state_set.js

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/**
 * A StateSet is a render node that sets render states of all of its
 * children. You can make this a parent of a part of the render graph to set
 * render states in a more global way.
 *
 * @param {o3d.State} opt_state The State the defines what states to set.
 * @constructor
 */
o3d.StateSet = function(opt_state) {
  o3d.RenderNode.call(this);

  /**
   * The State for this StateSet.
   * @type {o3d.State}
   */
  this.state = opt_state || null;
};
o3d.inherit('StateSet', 'RenderNode');

o3d.ParamObject.setUpO3DParam_(o3d.StateSet, 'state', 'ParamState');

/**
 * Sets the current state to the member state.
 */
o3d.StateSet.prototype.before = function() {
  if (this.state) {
    this.state.push_();
  }
};

/**
 * Sets the current state to the member state.
 */
o3d.StateSet.prototype.after = function() {
  if (this.state) {
    this.state.pop_();
  }
};