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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 | 1x 52905x 52905x 1x | // tslint:disable-next-line: export-name export const getTransformedPosition = ( x: number, y: number, transformMatrix?: [number, number, number, number, number, number] ) => { Eif (!transformMatrix) { return { x, y }; } const realX = transformMatrix[0] * x + transformMatrix[2] * y + transformMatrix[4]; const realY = transformMatrix[1] * x + transformMatrix[3] * y + transformMatrix[5]; return { x: realX, y: realY }; }; export const getTransformedDxDy = ( dx: number, dy: number, transformMatrix?: [number, number, number, number, number, number] ): { dx: number; dy: number } => { if (!transformMatrix) { return { dx, dy }; } const [a, b, c, d] = transformMatrix; const realDx = (d * dx) / (a * d - b * c) + (c * dy) / (b * c - a * d); const realDy = (b * dx) / (b * c - a * d) + (a * dy) / (a * d - b * c); return { dx: realDx, dy: realDy }; }; |