WebGL-沿对象行进的方向旋转对象 [英] WebGL - Rotating object in the direction it is travelling
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问题描述
在此示例中: http://deeplogic.info/project/webGL/
如何沿对象行进的方向旋转对象?
How can I rotate the object in the direction in which it is travelling?
推荐答案
To get rotation around z for an object moving in the direction (x, y) you can use the Math.atan2(y,x) method. It'll return an angle in radians. The OpenGL convention prior to ES 2 was to work in degrees, but nowadays it's up to whatever code you have to push transformations to the vertex shader. You'll probably want to convert though, in which case just multiply the result by 180 (half a circle in degrees) and divide by pi (half a circle in radians).
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