![]() ![]() This angle is determined by the number of frames you have like Philip has already shown. Where a is the desired angle you want to rotate. A rotation matrix is a matrix which you can multiply with your vector to achieve a rotation around the origin (0,0). Remember, we move our point (-1,-2) down at first and then (1,2) up again. Actually my image sucks a bit here, the purple arrow which is going upwards should be the same diagonal as the first purple arrow. This moving-around is called translation. To solve it, we move our point a bit left-down, then we can rotate it around (0,0) and then we move it back again. But with matrices we would rotate around (0,0) as the purple circle shows. We want to rotate the point (5,5) around (1,2) like the green circle indicates. I hope these images make my math talk a bit clearer )
0 Comments
Leave a Reply. |