@awayfl/awayfl-player/dist/lib/Box2D/Common/Math/b2Mat22.js

Flash Player emulator for executing SWF files (published for FP versions 6 and up) in javascript

import { b2Vec2 } from '../Math';
/**
* A 2-by-2 matrix. Stored in column-major order.
*/
var b2Mat22 = /** @class */ (function () {
    function b2Mat22() {
        this.__fast__ = true;
        this.col1 = new b2Vec2();
        this.col2 = new b2Vec2();
        this.col1.x = this.col2.y = 1.0;
    }
    b2Mat22.FromAngle = function (angle) {
        var mat = new b2Mat22();
        mat.Set(angle);
        return mat;
    };
    b2Mat22.FromVV = function (c1, c2) {
        var mat = new b2Mat22();
        mat.SetVV(c1, c2);
        return mat;
    };
    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 () {
        var mat = new b2Mat22();
        mat.SetM(this);
        return mat;
    };
    b2Mat22.prototype.SetM = function (m) {
        //@ts-ignore
        this.col1.SetV(m.col1 || m.$Bgcol1);
        //@ts-ignore
        this.col2.SetV(m.col2 || m.$Bgcol2);
    };
    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);
    };
    /**
     * Compute the inverse of this matrix, such that inv(A) * A = identity.
     */
    b2Mat22.prototype.GetInverse = 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;
        if (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;
        if (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 };