1

Can someone tell me the formula of the curve , it is a bezier(or something eqivalent) ,
but the formulas I tried couldn’t match the curve drawn using the Evaluate method of AnimationCurve .
Pls help ,I can even pay for the right formula :)) .
I would do anything to see the C++ unity code that’s implementing the Evaluate :stuck_out_tongue: .

3
2

My guess is cubic Hermite splines:

4

It should be something like this:

float Evaluate(float t, Keyframe keyframe0, Keyframe keyframe1)
{
	float dt = keyframe1.time - keyframe0.time;
	
	float m0 = keyframe0.outTangent * dt;
	float m1 = keyframe1.inTangent * dt;

	float t2 = t * t;
	float t3 = t2 * t;
	
	float a = 2 * t3 - 3 * t2 + 1;
	float b = t3 - 2 * t2 + t;
	float c = t3 - t2;
	float d = -2 * t3 + 3 * t2;
	
	return a * keyframe0.value + b * m0 + c * m1 + d * keyframe1.value;
}