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/*
* Copyright 2010, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* The Shape represents a collection of Elements. The typical example is a
* cube with 6 faces where each face uses a different material would be
* represented as 1 Shape with 6 Elements, one for each material.
* @constructor
*/
o3d.Shape = function() {
o3d.ParamObject.call(this);
this.elements = [];
};
o3d.inherit('Shape', 'ParamObject');
/**
* The elements owned by this shape.
*
* Each access to this field gets the entire list so it is best to get it
* just once. For example:
*
* var elements = renderNode.elements;
* for (var i = 0; i < elements.length; i++) {
* var element = elements[i];
* }
*
* Note that modifications to this array [e.g. push()] will not affect
* the underlying Shape, while modifications to the array's members
* will affect them.
*/
o3d.Shape.prototype.elements = [];
/**
* Finds a draw element in the given list of draw elements that uses the given
* material if such a draw element exists. Returns null otherwise.
* @param {Array.<!o3d.DrawElements>} drawElements An array of draw elements.
* @param {o3d.Material} material A material to search for.
* @private
*/
o3d.Shape.findDrawElementWithMaterial_ = function(drawElements, material) {
for (var j = 0; j < drawElements.length; ++j) {
if (drawElements[j].material == material) {
return drawElements[j];
}
}
return null;
};
/**
* Creates a DrawElement for each Element owned by this Shape.
* If an Element already has a DrawElement that uses material a new
* DrawElement will not be created.
* @param {o3d.Pack} pack pack used to manage created DrawElements.
* @param {o3d.Material} material material to use for each DrawElement.
* Note: When a DrawElement with a material of null is rendered, the
* material on the corresponding Element will get used instead.
* This allows you to easily setup the default (just draw as is) by
* passing null or setup a shadow pass by passing in a shadow material.
*/
o3d.Shape.prototype.createDrawElements =
function(pack, material) {
var elements = this.elements;
for (var i = 0; i < elements.length; ++i) {
var element = elements[i];
if (!o3d.Shape.findDrawElementWithMaterial_(element.drawElements,
material)) {
element.createDrawElement(pack, material);
}
}
};
/**
* Adds and element to the list of elements for this shape.
* @param {o3d.Element} element The element to add.
*/
o3d.Shape.prototype.addElement = function(element) {
this.elements.push(element);
};
/**
* Removes and element to the list of elements for this shape.
* @param {o3d.Element} element The element to add.
*/
o3d.Shape.prototype.removeElement = function(element) {
o3d.removeFromArray(this.elements, element);
};
/**
* Called when the tree traversal finds this shape in the transform tree.
* Adds objects to the given drawlists if the drawlist of the material matches.
* @param {Array.<Object>} drawListInfos A list of objects containing
* drawlists and matrix info.
* @param {o3d.math.Matrix4} world The world matrix.
*/
o3d.Shape.prototype.writeToDrawLists =
function(drawListInfos, world, transform) {
var elements = this.elements;
// Iterate through elements of this shape.
for (var i = 0; i < elements.length; ++i) {
var element = elements[i];
// For each element look at the DrawElements for that element.
for (var j = 0; j < element.drawElements.length; ++j) {
this.gl.client.render_stats_['drawElementsProcessed']++;
var drawElement = element.drawElements[j];
var material = drawElement.material || drawElement.owner.material;
var materialDrawList = material.drawList;
var rendered = false;
// Iterate through the drawlists we might write to.
for (var k = 0; k < drawListInfos.length; ++k) {
var drawListInfo = drawListInfos[k];
var list = drawListInfo.list;
// If any of those drawlists matches the material on the drawElement,
// add the drawElement to the list.
if (materialDrawList == list) {
var context = drawListInfo.context;
var view = context.view;
var projection = context.projection;
var worldViewProjection = [[], [], [], []];
var viewProjection = [[], [], [], []];
o3d.Transform.compose(projection, view, viewProjection);
o3d.Transform.compose(viewProjection, world, worldViewProjection);
if (element.cull && element.boundingBox) {
if (!element.boundingBox.inFrustum(worldViewProjection)) {
continue;
}
}
rendered = true;
list.list_.push({
view: view,
projection: projection,
world: world,
viewProjection: viewProjection,
worldViewProjection: worldViewProjection,
transform: transform,
drawElement: drawElement
});
}
}
if (rendered) {
this.gl.client.render_stats_['drawElementsRendered']++;
} else {
this.gl.client.render_stats_['drawElementsCulled']++;
}
}
}
};
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