tools/cc-frame-viewer/src/base/gl_matrix.js

   1 /* Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2  * Use of this source code is governed by a BSD-style license that can be
   3  * found in the LICENSE file.
   4  */
   5 'use strict';
   6
   7 base.requireRawScript('../third_party/gl-matrix/src/gl-matrix/common.js');
   8 base.requireRawScript('../third_party/gl-matrix/src/gl-matrix/mat2d.js');
   9 base.requireRawScript('../third_party/gl-matrix/src/gl-matrix/vec2.js');
  10
  11 base.exportTo('base', function() {
  12   var tmp_vec2 = vec2.create();
  13   var tmp_mat2d = mat2d.create();
  14
  15   vec2.createXY = function(x, y) {
  16     var v = vec2.create();
  17     vec2.set(v, x, y);
  18     return v;
  19   };
  20
  21   vec2.asPoint = function(v) {
  22     return {x: v[0],
  23             y: v[1]};
  24   }
  25
  26   mat2d.translateInplace = function(inout, v) {
  27     mat2d.translate(tmp_mat2d, inout, v);
  28     mat2d.copy(inout, tmp_mat2d);
  29   }
  30
  31   mat2d.translateInplaceXY = function(inout, x, y) {
  32     vec2.set(tmp_vec2, x, y);
  33     mat2d.translateInplace(inout, tmp_vec2);
  34   }
  35
  36   mat2d.scaleInplace = function(inout, v) {
  37     mat2d.scale(tmp_mat2d, inout, v);
  38     mat2d.copy(inout, tmp_mat2d);
  39   }
  40
  41   mat2d.scaleInplaceXY = function(inout, x, y) {
  42     vec2.set(tmp_vec2, x, y);
  43     mat2d.scaleInplace(inout, tmp_vec2);
  44   }
  45
  46   mat2d.rotateInplace = function(inout, rad) {
  47     mat2d.rotate(tmp_mat2d, inout, rad);
  48     mat2d.copy(inout, tmp_mat2d);
  49   }
  50
  51   function signPt(p1, p2, p3)
  52   {
  53     return (p1.x - p3.x) * (p2.y - p3.y) - (p2.x - p3.x) * (p1.y - p3.y);
  54   }
  55
  56   function pointInTriangle2Pt(pt, p1, p2, p3)
  57   {
  58     var b1 = signPt(pt, p1, p2) < 0.0;
  59     var b2 = signPt(pt, p2, p3) < 0.0;
  60     var b3 = signPt(pt, p3, p1) < 0.0;
  61     return ((b1 == b2) && (b2 == b3));
  62   }
  63
  64   function pointInQuad2Pt(pt, q)
  65   {
  66     return pointInTriangle2Pt(pt, q.p1, q.p2, q.p3) ||
  67            pointInTriangle2Pt(pt, q.p1, q.p3, q.p4);
  68   }
  69
  70   return {
  71     pointInTriangle2Pt: pointInTriangle2Pt,
  72     pointInQuad2Pt: pointInQuad2Pt
  73   }
  74 });