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/*
* Copyright 2009, 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.
*/
/**
* @fileoverview This file contains various functions for helping setup
* shapes for o3d. It puts them in the "shape" module on the o3djs
* object.
*
* Note: This library is only a sample. It is not meant to be some official
* library. It is provided only as example code.
*
*/
o3djs.provide('o3djs.shape');
o3djs.require('o3djs.math');
o3djs.require('o3djs.element');
/**
* A Module for shapes.
* @namespace
*/
o3djs.shape = o3djs.shape || {};
/**
* Adds missing tex coord streams to a shape's elements.
* @param {!o3d.Shape} shape Shape to add missing streams to.
* @see o3djs.element.addMissingTexCoordStreams
*/
o3djs.shape.addMissingTexCoordStreams = function(shape) {
var elements = shape.elements;
for (var ee = 0; ee < elements.length; ++ee) {
var element = elements[ee];
o3djs.element.addMissingTexCoordStreams(element);
}
};
/**
* Sets the bounding box and z sort points of a shape's elements.
* @param {!o3d.Shape} shape Shape to set info on.
*/
o3djs.shape.setBoundingBoxesAndZSortPoints = function(shape) {
var elements = shape.elements;
for (var ee = 0; ee < elements.length; ++ee) {
var element = elements[ee];
o3djs.element.setBoundingBoxAndZSortPoint(element);
}
};
/**
* Prepares a shape by setting its boundingBox, zSortPoint and creating
* DrawElements.
* @param {!o3d.Pack} pack Pack to manage created objects.
* @param {!o3d.Shape} shape Shape to prepare.
*/
o3djs.shape.prepareShape = function(pack, shape) {
shape.createDrawElements(pack, null);
o3djs.shape.setBoundingBoxesAndZSortPoints(shape);
o3djs.shape.addMissingTexCoordStreams(shape);
};
/**
* Prepares all the shapes in the given pack by setting their boundingBox,
* zSortPoint and creating DrawElements.
* @param {!o3d.Pack} pack Pack to manage created objects.
*/
o3djs.shape.prepareShapes = function(pack) {
var shapes = pack.getObjectsByClassName('o3d.Shape');
for (var ss = 0; ss < shapes.length; ++ss) {
o3djs.shape.prepareShape(pack, shapes[ss]);
}
};
/**
* Attempts to delete the parts of a shape that were created by
* duplicateShape as well as any drawElements attached to it.
* @param {!o3d.Shape} shape shape to delete.
* @param {!o3d.Pack} pack Pack to release objects from.
*/
o3djs.shape.deleteDuplicateShape = function(shape, pack) {
var elements = shape.elements;
for (var ee = 0; ee < elements.length; ee++) {
var element = elements[ee];
var drawElements = element.drawElements;
for (var dd = 0; dd < drawElements.length; dd++) {
var drawElement = drawElements[dd];
pack.removeObject(drawElement);
}
pack.removeObject(element);
}
pack.removeObject(shape);
};
/**
* Copies a shape's elements and streambank or buffers so the two will share
* streambanks, vertex and index buffers.
* @param {!o3d.Pack} pack Pack to manage created objects.
* @param {!o3d.Shape} source The Shape to copy.
* @return {!o3d.Shape} the new copy of the shape.
*/
o3djs.shape.duplicateShape = function(pack, source) {
var newShape = pack.createObject('Shape');
var elements = source.elements;
for (var ee = 0; ee < elements.length; ee++) {
var newElement = o3djs.element.duplicateElement(pack, elements[ee]);
newElement.owner = newShape;
}
newShape.createDrawElements(pack, null);
return newShape;
};
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