AnimationHelper.cpp

#include "AnimationHelper.h"


Keyframe::Keyframe():TimePos(0),Translation(0.0f,0.0f,0.0f),Scale(1.0f,1.0f,1.0f),RotationQuat(0.0f,0.0f,0.0f,1.0f)
{

}

Keyframe::~Keyframe()
{
	
}

float BoneAnimation::GetStartTime()const
{
	return Keyframes.front().TimePos;
}

float BoneAnimation::GetEndTime()const
{
	return Keyframes.back().TimePos;
}

void BoneAnimation::Interpolate(float t , XMFLOAT4X4& M)const
{
	if(t <= Keyframes.front().TimePos)
	{
		XMVECTOR S = XMLoadFloat3(&Keyframes.front().Scale);
		XMVECTOR P = XMLoadFloat3(&Keyframes.front().Translation);
		XMVECTOR Q = XMLoadFloat4(&Keyframes.front().RotationQuat);

		XMVECTOR zero = XMVectorSet(0.0f,0.0f,0.0f,1.0f);
		XMStoreFloat4x4(&M,XMMatrixAffineTransformation(S,zero,Q,P));
	}else if(t >= Keyframes.back().TimePos)
	{
		XMVECTOR S = XMLoadFloat3(&Keyframes.back().Scale);
		XMVECTOR P = XMLoadFloat3(&Keyframes.back().Translation);
		XMVECTOR Q = XMLoadFloat4(&Keyframes.back().RotationQuat);

		XMVECTOR zero = XMVectorSet(0.0f,0.0f,0.0f,1.0f);
		XMStoreFloat4x4(&M,XMMatrixAffineTransformation(S,zero,Q,P));
	}else
	{
		for (UINT i = 0; i < Keyframes.size()-1; i++)
		{
			if(t >= Keyframes[i].TimePos && t <= Keyframes[i+1].TimePos)
			{
				float lerpPercent = (t - Keyframes[i].TimePos)/(Keyframes[i+1].TimePos - Keyframes[i].TimePos);

				XMVECTOR s0 = XMLoadFloat3(&Keyframes[i].Scale);
				XMVECTOR s1 = XMLoadFloat3(&Keyframes[i+1].Scale);

				XMVECTOR p0 = XMLoadFloat3(&Keyframes[i].Translation);
				XMVECTOR p1 = XMLoadFloat3(&Keyframes[i+1].Translation);

				XMVECTOR q0 = XMLoadFloat4(&Keyframes[i].RotationQuat);
				XMVECTOR q1 = XMLoadFloat4(&Keyframes[i+1].RotationQuat);

				XMVECTOR S = XMVectorLerp(s0,s1,lerpPercent);
				XMVECTOR P = XMVectorLerp(p0,p1,lerpPercent);
				XMVECTOR Q = XMQuaternionSlerp(q0,q1,lerpPercent);

				XMVECTOR zero = XMVectorSet(0.0f,0.0f,0.0f,1.0f);
				XMStoreFloat4x4(&M,XMMatrixAffineTransformation(S,zero,Q,P));

				break;
			}
		}
	}
}