foam-framework
Version:
MVC metaprogramming framework
89 lines (81 loc) • 2.51 kB
JavaScript
/**
* @license
* Copyright 2015 Google Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
CLASS({
package: 'foam.graphics.webgl.matrix',
name: 'OrthoMatrix4',
extends: 'foam.graphics.webgl.matrix.Matrix4',
properties: [
{
name: 'left',
help: 'The left of the viewport.',
defaultValue: 0,
postSet: function() { this.reset_(); }
},
{
name: 'width',
help: 'The width of the viewport.',
defaultValue: 1000,
postSet: function() { this.reset_(); }
},
{
name: 'top',
help: 'The top of the viewport.',
defaultValue: 0,
postSet: function() { this.reset_(); }
},
{
name: 'height',
help: 'The left of the viewport.',
defaultValue: 500,
postSet: function() { this.reset_(); }
},
{
name: 'znear',
help: 'The near z clipping plane.',
defaultValue: -1000,
postSet: function() { this.reset_(); }
},
{
name: 'zfar',
help: 'The far z clipping plane.',
defaultValue: 1000,
postSet: function() { this.reset_(); }
},
],
methods: [
function recalculate_() {
/* Implement in your submodels to calculate and return the contents
of this matrix. */
this.instance_.flat = this.makeOrtho(this.left, this.left+this.width, (this.top+this.height), this.top, this.znear, this.zfar);
},
//
// glOrtho
//
function makeOrtho(left, right,
bottom, top,
znear, zfar)
{
var tx = -(right+left)/(right-left);
var ty = -(top+bottom)/(top-bottom);
var tz = -(zfar+znear)/(zfar-znear);
return [ 2/(right-left), 0, 0, 0,
0, 2/(top-bottom), 0, 0,
0, 0, -2/(zfar-znear), 0,
tx, ty, tz, 1];
},
]
});