问题
How do I calculate the reflection vector to this problem? Using the formula r = v - 2 (v.n)n I can get the reflection when the object is sat on the x or y axis however when using this formula when it isnt seems to give strange results. Any help would be greatly appreciated.
Example of the problem
回答1:
The normal vector n needs to be normalized.
In your example, n should be (1/sqrt(2), 1/sqrt(2)).
来源：https://stackoverflow.com/questions/58699100/how-to-find-reflection-vector-when-the-object-doesnt-sit-on-an-axis