| 1 | export const create = () => {
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| 2 | return [1, 0, 0, 1, 0, 0];
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| 3 | };
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| 4 | export const getTranslateX = m => {
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| 5 | return m[4];
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| 6 | };
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| 7 | export const getTranslateY = m => {
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| 8 | return m[5];
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| 9 | };
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| 10 | export const getScaleX = m => {
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| 11 | return m[0];
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| 12 | };
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| 13 | export const getScaleY = m => {
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| 14 | return m[3];
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| 15 | };
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| 16 | export const translate = (m, x, y) => {
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| 17 | return multiply([1, 0, 0, 1, x, y], m);
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| 18 | };
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| 19 | export const scale = (m, scaleX, scaleY = scaleX) => {
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| 20 | return multiply([scaleX, 0, 0, scaleY, 0, 0], m);
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| 21 | };
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| 22 | export const apply = (m, [ox, oy]) => {
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| 23 | return [m[0] * ox + m[2] * oy + m[4], m[1] * ox + m[3] * oy + m[5]];
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| 24 | };
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| 25 | export const multiply = (m1, m2) => {
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| 26 | return [m1[0] * m2[0] + m1[2] * m2[1], m1[1] * m2[0] + m1[3] * m2[1], m1[0] * m2[2] + m1[2] * m2[3], m1[1] * m2[2] + m1[3] * m2[3], m1[0] * m2[4] + m1[2] * m2[5] + m1[4], m1[1] * m2[4] + m1[3] * m2[5] + m1[5]];
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| 27 | }; |
| \ | No newline at end of file |