44 lines
1.2 KiB
JavaScript
44 lines
1.2 KiB
JavaScript
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Elm.Native.Graphics.Matrix = function(elm) {
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"use strict";
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elm.Native = elm.Native || {};
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elm.Native.Graphics = elm.Native.Graphics || {};
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if (elm.Native.Graphics.Matrix) return elm.Native.Graphics.Matrix;
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try { Float32Array; } catch(e) { Float32Array = Array; }
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var A = Float32Array;
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var identity = new A([1,0,0,0,1,0]);
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function rotate(t,m) {
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var c = Math.cos(t);
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var s = Math.sin(t);
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var m0 = m[0], m1 = m[1], m3 = m[3], m4 = m[4];
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return new A([m0*c + m1*-s, m0*s + m1*c, m[2],
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m3*c + m4*-s, m3*s + m4*c, m[5]]);
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}
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function scale(x,y,m) {
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return new A([m[0]*x, m[1]*y, m[2],
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m[3]*x, m[4]*y, m[5]]);
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}
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function move(x,y,m) {
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var m0 = m[0], m1 = m[1], m3 = m[3], m4 = m[4];
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return new A([m0, m1, m0*x + m1*y + m[2],
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m3, m4, m3*x + m4*y + m[5]]);
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}
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function matrix(a,b,c,d,e,f,m) {
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var m0 = m[0], m1 = m[1], m3 = m[3], m4 = m[4];
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return new A([m0*a + m1*d, m0*b + m1*e, m0*c + m1*f + m[2],
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m3*a + m4*d, m3*b + m4*e, m3*c + m4*f + m[5]]);
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}
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return elm.Native.Graphics.Matrix = {
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identity:identity,
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rotation:F2(rotation),
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scale:F3(scale),
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move:F3(move),
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matrix:F7(matrix)
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};
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};
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