@awayfl/awayfl-player
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Flash Player emulator for executing SWF files (published for FP versions 6 and up) in javascript
117 lines (116 loc) • 3.92 kB
JavaScript
/*
* Copyright (c) 2006-2007 Erin Catto http://www.gphysics.com
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
import { b2Vec2 } from '../Math';
/// A 2-by-2 matrix. Stored in column-major order.
var b2Mat22 = /** @class */ (function () {
function b2Mat22(angle, c1, c2) {
if (angle === void 0) { angle = 0; }
if (c1 === void 0) { c1 = null; }
if (c2 === void 0) { c2 = null; }
this.col1 = new b2Vec2();
this.col2 = new b2Vec2();
if (c1 != null && c2 != null) {
this.col1.SetV(c1);
this.col2.SetV(c2);
}
else {
var c = Math.cos(angle);
var s = Math.sin(angle);
this.col1.x = c;
this.col2.x = -s;
this.col1.y = s;
this.col2.y = c;
}
}
b2Mat22.prototype.Set = function (angle) {
var c = Math.cos(angle);
var s = Math.sin(angle);
this.col1.x = c;
this.col2.x = -s;
this.col1.y = s;
this.col2.y = c;
};
b2Mat22.prototype.SetVV = function (c1, c2) {
this.col1.SetV(c1);
this.col2.SetV(c2);
};
b2Mat22.prototype.Copy = function () {
return new b2Mat22(0, this.col1, this.col2);
};
b2Mat22.prototype.SetM = function (m) {
this.col1.SetV(m.col1);
this.col2.SetV(m.col2);
};
b2Mat22.prototype.AddM = function (m) {
this.col1.x += m.col1.x;
this.col1.y += m.col1.y;
this.col2.x += m.col2.x;
this.col2.y += m.col2.y;
};
b2Mat22.prototype.SetIdentity = function () {
this.col1.x = 1.0;
this.col2.x = 0.0;
this.col1.y = 0.0;
this.col2.y = 1.0;
};
b2Mat22.prototype.SetZero = function () {
this.col1.x = 0.0;
this.col2.x = 0.0;
this.col1.y = 0.0;
this.col2.y = 0.0;
};
b2Mat22.prototype.GetAngle = function () {
return Math.atan2(this.col1.y, this.col1.x);
};
b2Mat22.prototype.Invert = function (out) {
var a = this.col1.x;
var b = this.col2.x;
var c = this.col1.y;
var d = this.col2.y;
//var B:b2Mat22 = new b2Mat22();
var det = a * d - b * c;
//b2Settings.b2Assert(det != 0.0);
det = 1.0 / det;
out.col1.x = det * d;
out.col2.x = -det * b;
out.col1.y = -det * c;
out.col2.y = det * a;
return out;
};
// Solve A * x = b
b2Mat22.prototype.Solve = function (out, bX, bY) {
//float32 a11 = col1.x, a12 = col2.x, a21 = col1.y, a22 = col2.y;
var a11 = this.col1.x;
var a12 = this.col2.x;
var a21 = this.col1.y;
var a22 = this.col2.y;
//float32 det = a11 * a22 - a12 * a21;
var det = a11 * a22 - a12 * a21;
//b2Settings.b2Assert(det != 0.0);
det = 1.0 / det;
out.x = det * (a22 * bX - a12 * bY);
out.y = det * (a11 * bY - a21 * bX);
return out;
};
b2Mat22.prototype.Abs = function () {
this.col1.Abs();
this.col2.Abs();
};
return b2Mat22;
}());
export { b2Mat22 };