line-drawing

问题 We need to compare two hand drawn images..these images are drawn on the sprite kit.we need to see whether these pictures are roughly match or not. For Example, if someone draws a smile pic, we need to check whether the redrawing smile pic is looks like the first drawn smile pic or not.we need to know whether the two images look alike or not...and to calculate the accuracy percentage of how similar they are..Please suggest some solutions.Thanks in advance. 回答1: You could try draw each of the

问题 I have to use a propriertary graphics-engine for drawing a line. I can rotate the whole drawing by its origin point (P1). What I want, is to rotate it around its center point(M). So basically that it looks like L_correct instead of L_wrong. I think, it should be possible to correct it, by moving it from P1 to P2. But I cannot figure out what formula could be used, to determine the distance. It must probably involve the angle, width and height... So basically my question is, if there is a