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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 DrawContext defines the parameters used for a particular drawing pass.
* It contains two 4-by-4 matrix params, view and
* projection. These correspond to the viewing and projection transformation
* matrices.
*
* @param {!o3d.Matrix4} opt_view The view matrix for this DrawContext.
* @param {!o3d.Matrix4} opt_projection The projection matrix
* for this DrawContext.
* @constructor
*/
o3d.DrawContext = function(opt_view, opt_projection) {
o3d.ParamObject.call(this);
/**
* The view matrix represents the viewing transformation, used to
* take vertices from world space to view space.
* @type {o3d.Matrix4}
*/
this.view = opt_view ||
[[1, 0, 0, 0], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]];
/**
* The projection matrix represents the projection transformation,
* used to take vertices from view space to screen space. This
* matrix is usually an orthographic or perspective transformation.
* @type {o3d.Matrix4}
*/
this.projection = opt_projection ||
[[1, 0, 0, 0], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]];
};
o3d.inherit('DrawContext', 'ParamObject');
o3d.ParamObject.setUpO3DParam_(o3d.DrawContext, 'view', 'ParamMatrix4');
o3d.ParamObject.setUpO3DParam_(o3d.DrawContext, 'projection', 'ParamMatrix4');
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