
Affine矩阵算法推理
Affine变换的效果为: If a point originally had coordinates (x, y), then after the transformation it will have coordinates (ax + cy + e, bx + dy + f) 参考setTransform文档 设各点表示为 src: (s00, s01), (s10, s11), (s20, s21); dst: (d00, d01), ... 整理可得两组三元一次等式: a, c, e: \[\begin{array}{c} d00 = a * s00 + c * s01 + e \\ d10 = a * s10 + c * s11 + e \\ d20 = a * s20 + c * s21 + e \\ \end{array}\]...