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- import PathProxy from '../core/PathProxy';
- import {applyTransform as v2ApplyTransform, VectorArray} from '../core/vector';
- import { MatrixArray } from '../core/matrix';
- const CMD = PathProxy.CMD;
- const points: VectorArray[] = [[], [], []];
- const mathSqrt = Math.sqrt;
- const mathAtan2 = Math.atan2;
- export default function transformPath(path: PathProxy, m: MatrixArray) {
- if (!m) {
- return;
- }
- let data = path.data;
- const len = path.len();
- let cmd;
- let nPoint: number;
- let i: number;
- let j: number;
- let k: number;
- let p: VectorArray;
- const M = CMD.M;
- const C = CMD.C;
- const L = CMD.L;
- const R = CMD.R;
- const A = CMD.A;
- const Q = CMD.Q;
- for (i = 0, j = 0; i < len;) {
- cmd = data[i++];
- j = i;
- nPoint = 0;
- switch (cmd) {
- case M:
- nPoint = 1;
- break;
- case L:
- nPoint = 1;
- break;
- case C:
- nPoint = 3;
- break;
- case Q:
- nPoint = 2;
- break;
- case A:
- const x = m[4];
- const y = m[5];
- const sx = mathSqrt(m[0] * m[0] + m[1] * m[1]);
- const sy = mathSqrt(m[2] * m[2] + m[3] * m[3]);
- const angle = mathAtan2(-m[1] / sy, m[0] / sx);
- // cx
- data[i] *= sx;
- data[i++] += x;
- // cy
- data[i] *= sy;
- data[i++] += y;
- // Scale rx and ry
- // FIXME Assume psi is 0 here
- data[i++] *= sx;
- data[i++] *= sy;
- // Start angle
- data[i++] += angle;
- // end angle
- data[i++] += angle;
- // FIXME psi
- i += 2;
- j = i;
- break;
- case R:
- // x0, y0
- p[0] = data[i++];
- p[1] = data[i++];
- v2ApplyTransform(p, p, m);
- data[j++] = p[0];
- data[j++] = p[1];
- // x1, y1
- p[0] += data[i++];
- p[1] += data[i++];
- v2ApplyTransform(p, p, m);
- data[j++] = p[0];
- data[j++] = p[1];
- }
- for (k = 0; k < nPoint; k++) {
- let p = points[k];
- p[0] = data[i++];
- p[1] = data[i++];
- v2ApplyTransform(p, p, m);
- // Write back
- data[j++] = p[0];
- data[j++] = p[1];
- }
- }
- path.increaseVersion();
- }
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