User Interface Programming - Game Coding Complete - page 282

CPoint m_lastMousePos;

BYTE m_bKey[256]; // Which keys are up and down

// Orientation Controls
float m_fTargetYaw;

float m_fTargetPitch;

float m_fYaw;

float m_fPitch;

float m_fPitchOnDown;

float m_fYawOnDown;

float m_maxSpeed;

float m_currentSpeed;

shared_ptr<SceneNode> m_object;

public:
MovementController(shared_ptr<SceneNode> object,
float initialYaw, float initialPitch);
void SetObject(shared_ptr<SceneNode> newObject);
void OnUpdate(DWORD const elapsedMs);

public:
bool VOnPointerMove(const CPoint &mousePos, const int radius);
bool VOnPointerButtonDown(const CPoint &mousePos, const int radius,
const std::string &buttonName);
bool VOnPointerButtonUp(const CPoint &mousePos, const int radius,
const std::string &buttonName);
bool VOnKeyDown(const BYTE c) { m_bKey[c] = true; return true; }
bool VOnKeyUp(const BYTE c) { m_bKey[c] = false; return true; }

const Mat4x4 *GetToWorld() { return &m_matToWorld; }
const Mat4x4 *GetFromWorld() { return &m_matFromWorld; }
};

I ' m giving you something of a sneak peak into Chapter 14, “ 3D Graphics Basics, ”

with the introduction of the Mat4x4 member variables. I won t explain them in

detail here, but suffice it to say that these members track where an object is in rela-
tion to the game world and how it is oriented.
Since this WASD controller doesn

'

ll simply return
false from the mouse button up and down handlers. Notice that the VOnKeyUp()
and VOnKeyDown() methods simply set members of a Boolean array to be true or
false to match the state of the key. Now, take a look at VOnPointerMove() :

' t have any weapons to fire, we '

bool MovementController::VOnPointerMove(const CPoint &mousePos)