Quote:

Original post by c_back Where is the Vector3 definition found? Can't seem to find it in any DirectX file as of yet. Is it C# only?

#include <d3dx9.h>
#ifndef CAMERA_H
#define CAMERA_H

/*
	Quaternion based Camera by Haze
	haze42@gmail.com
*/
class Camera{
private:
	D3DXVECTOR3 mPosition;
	D3DXVECTOR3 mUp;
	D3DXVECTOR3 mDirection;
	D3DXMATRIXA16 mTransform;
public:
	Camera(D3DXVECTOR3 pos, FLOAT hRot, FLOAT vRot, FLOAT zRot=0){
		mPosition = pos;
		mUp = D3DXVECTOR3(0,1,0);
		mDirection = D3DXVECTOR3(0,0,-1);
		D3DXMatrixIdentity(&mTransform);
	}
	~Camera(){}
	
	//Move the camera forward/backward/sidestep
	VOID MoveCamera(FLOAT forward, FLOAT strafe=0){
		D3DXMATRIXA16 pTranslate;
		D3DXMatrixTranslation(&pTranslate,strafe,0,forward);
		D3DXMatrixMultiply(&mTransform,&mTransform,&pTranslate);
		//We create a translation matrix directly from the input fwd/back and strafe distance.
		//This is then added to the total camera tranformation matrix where rotation is added
		//giving us the correct direction

	}
	//Rotate the camera around horiz, vertical and z
	VOID RotateCamera(FLOAT h, FLOAT v, FLOAT z=0){
		D3DXQUATERNION qR;
		D3DXMATRIXA16 sRotate;
		D3DXMATRIXA16 sTransform;
		D3DXQuaternionRotationYawPitchRoll(&qR, h*(D3DX_PI/180.0f),
												v*(D3DX_PI/180.0f),
												z*(D3DX_PI/180.0f));
		D3DXMatrixAffineTransformation(&sRotate,1.0f,NULL,&qR,NULL);
		D3DXMatrixInverse(&sTransform,NULL,&sRotate);
		D3DXMatrixMultiply(	(D3DXMATRIX*)&mTransform,
							(D3DXMATRIX*)&mTransform,
							(D3DXMATRIX*)&sTransform);
	} 

	D3DXMATRIXA16 GetViewTransformation(){
		D3DXMATRIXA16 pView;
		if(FAILED(D3DXMatrixLookAtLH((D3DXMATRIX*)&pView,&mPosition,&mDirection,&mUp)))
			D3DXMatrixIdentity(&pView);
		D3DXMatrixMultiply(&pView,&pView,&mTransform);
		return pView;
	}
};