Game framework 9: wasd direction control {movementcontroller}

Framework engine game cocos2d-x wsad

The following implementation of the direction control is based on the w a s d on the keyboard to control the direction of the moving object. Below is the implementation ~

#pragma once//========================================================================// File: MovementController.h 就是实现键盘按钮 WASD 的方向控制//========================================================================#include "../GameCode4/Interfaces.h"#include "Geometry.h"// Forward declarationsclass SceneNode;typedef unsigned int  DWORD;typedef unsigned short WORD;typedef unsigned char  BYTE;typedef unsigned int  ActorId;typedef unsigned int  GameViewId;typedef D3DXCOLOR     Color;typedef float         FLOAT;typedef unsigned int  UINT;#ifdef   UNICODEtypedef wchar_t       TCHAR;#elsetypedef unsigned char TCHAR;#endiftypedef unsigned char CHAR;typedef unsigned wchar_t WCHAR;enum HRESULT{    E_INVALIDARG,    E_FAIL,    S_OK,};//////////////////////////////////////////////////////// MovementController Description////    Implements a WASD style movement controller////  class MovementController//////////////////////////////////////////////////////class IPointerHandler{public:    virtual bool VOnPointerMove(const Point &pos, const int radius) = 0;    virtual bool VOnPointerButtonDown(const Point &pos, const int radius, const std::string &buttonName) = 0;    virtual bool VOnPointerButtonUp(const Point &pos, const int radius, const std::string &buttonName) = 0;};class IKeyboardHandler{public:    virtual bool VOnKeyDown(const BYTE c)=0;    virtual bool VOnKeyUp(const BYTE c)=0;};class MovementController : public IPointerHandler, public IKeyboardHandler{protected:Mat4x4  m_matFromWorld;Mat4x4m_matToWorld;    Mat4x4  m_matPosition;Pointm_lastMousePos;boolm_bKey[256];// Which keys are up and down// Orientation Controlsfloatm_fTargetYaw;floatm_fTargetPitch;floatm_fYaw;floatm_fPitch;floatm_fPitchOnDown;floatm_fYawOnDown;floatm_maxSpeed;floatm_currentSpeed;// Added for Ch19/20 refactorboolm_mouseLButtonDown;boolm_bRotateWhenLButtonDown;shared_ptr<SceneNode> m_object;public:MovementController(shared_ptr<SceneNode> object, float initialYaw, float initialPitch, bool rotateWhenLButtonDown);void SetObject(shared_ptr<SceneNode> newObject);void OnUpdate(DWORD const elapsedMs);public:bool VOnPointerMove(const Point &mousePos, const int radius);bool VOnPointerButtonDown(const Point &mousePos, const int radius, const std::string &buttonName);bool VOnPointerButtonUp(const Point &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; }};

//========================================================================// File: MovementController.cpp//========================================================================#include "GameCodeStd.h"#include "Geometry.h"#include "MovementController.h"#include "SceneNodes.h"////////////////////////////////////////////////////// MovementController Implementation////////////////////////////////////////////////////#define MAX(a, b) ((a) >= (b) ? (a) : (b))#define MIN(a, b) ((a) < (b) ? (a) : (b))MovementController::MovementController(shared_ptr<SceneNode> object, float initialYaw, float initialPitch, bool rotateWhenLButtonDown): m_object(object){m_object->VGet()->Transform(&m_matToWorld, &m_matFromWorld);m_fTargetYaw = m_fYaw = RADIANS_TO_DEGREES(-initialYaw);m_fTargetPitch = m_fPitch = RADIANS_TO_DEGREES(initialPitch);m_maxSpeed = 30.0f;// 30 meters per secondm_currentSpeed = 0.0f;Vec3 pos = m_matToWorld.GetPosition();m_matPosition.BuildTranslation(pos);    POINT ptCursor;    GetCursorPos( &ptCursor );m_lastMousePos = ptCursor;memset(m_bKey, 0x00, sizeof(m_bKey));m_mouseLButtonDown = false;m_bRotateWhenLButtonDown = rotateWhenLButtonDown;}//// MovementController::VOnPointerButtonDown//bool MovementController::VOnPointerButtonDown(const Point &mousePos, const int radius, const std::string &buttonName){if (buttonName == "PointerLeft"){m_mouseLButtonDown = true;// We want mouse movement to be relative to the position// the cursor was at when the user first presses down on// the left buttonm_lastMousePos = mousePos;return true;}return false;}bool MovementController::VOnPointerButtonUp(const Point &mousePos, const int radius, const std::string &buttonName){if (buttonName == "PointerLeft"){m_mouseLButtonDown = false;return true;}return false;}//  class MovementController::VOnMouseMovebool MovementController::VOnPointerMove(const Point &mousePos, const int radius){// There are two modes supported by this controller.if (m_bRotateWhenLButtonDown){// Mode 1 - rotate the view only when the left mouse button is down// Only look around if the left button is downif(m_lastMousePos!=mousePos && m_mouseLButtonDown){m_fTargetYaw = m_fTargetYaw + (m_lastMousePos.x - mousePos.x);m_fTargetPitch = m_fTargetPitch + (mousePos.y - m_lastMousePos.y);m_lastMousePos = mousePos;}}else if(m_lastMousePos!=mousePos){// Mode 2 - rotate the controller when the mouse buttons are upm_fTargetYaw = m_fTargetYaw + (m_lastMousePos.x - mousePos.x);m_fTargetPitch = m_fTargetPitch + (mousePos.y - m_lastMousePos.y);m_lastMousePos = mousePos;}return true;}//  class MovementController::OnUpdatevoid MovementController::OnUpdate(DWORD const deltaMilliseconds){//if (m_bKey['Q'])//{//// This code is a cheat to position the camera exactly in a given//// spot so I can take screen shots!//Mat4x4 camTranslate;//D3DXMatrixTranslation(&m_matPosition, 8.847f, 7.055f, 11.618f);//m_fTargetYaw = m_fYaw += -64.35f;//m_fTargetPitch = m_fPitch = 28.57f;//// Calculate the new rotation matrix from the camera//// yaw and pitch.//Mat4x4 matRot;//D3DXMatrixRotationYawPitchRoll(&matRot, DEGREES_TO_RADIANS(m_fYaw), DEGREES_TO_RADIANS(m_fPitch), 0);//// Create the new object-to-world matrix, and the//// new world-to-object matrix. //D3DXMatrixMultiply(&m_matToWorld, &matRot, &m_matPosition);//D3DXMatrixInverse(&m_matFromWorld, NULL, &m_matToWorld);//m_object->VSetTransform(&m_matToWorld, &m_matFromWorld);//return;//}bool bTranslating = false;Vec4 atWorld(0,0,0,0);Vec4 rightWorld(0,0,0,0);Vec4 upWorld(0,0,0,0);if (m_bKey['W'] || m_bKey['S']){// In D3D, the "look at" default is always// the positive Z axis.Vec4 at = g_Forward4; if (m_bKey['S'])at *= -1;// This will give us the "look at" vector // in world space - we'll use that to move// the camera.atWorld = m_matToWorld.Xform(at);bTranslating = true;}if (m_bKey['A'] || m_bKey['D']){// In D3D, the "right" default is always// the positive X axis.Vec4 right = g_Right4; if (m_bKey['A'])right *= -1;// This will give us the "right" vector // in world space - we'll use that to move// the camerarightWorld = m_matToWorld.Xform(right);bTranslating = true;}if (m_bKey[' '] || m_bKey['C'] || m_bKey['X']){// In D3D, the "up" default is always// the positive Y axis.Vec4 up = g_Right4; if (!m_bKey[' '])up *= -1;//Unlike strafing, Up is always up no matter//which way you are lookingupWorld = up;bTranslating = true;}//Handling rotation as a result of mouse position{// The secret formula!!! Don't give it away!//If you are seeing this now, then you must be some kind of elite hacker!m_fYaw += (m_fTargetYaw - m_fYaw) * ( .35f );m_fTargetPitch = MAX(-90, MIN(90, m_fTargetPitch));m_fPitch += (m_fTargetPitch - m_fPitch) * ( .35f );// Calculate the new rotation matrix from the camera// yaw and pitch.Mat4x4 matRot;matRot.BuildYawPitchRoll(DEGREES_TO_RADIANS(-m_fYaw), DEGREES_TO_RADIANS(m_fPitch), 0);// Create the new object-to-world matrix, and the// new world-to-object matrix. m_matToWorld = matRot * m_matPosition;m_matFromWorld = m_matToWorld.Inverse(); m_object->VSetTransform(&m_matToWorld, &m_matFromWorld);}if (bTranslating){float elapsedTime = (float)deltaMilliseconds / 1000.0f;Vec3 direction = atWorld + rightWorld + upWorld;direction.Normalize(); // Ramp the acceleration by the elapsed time.float numberOfSeconds = 5.f;m_currentSpeed += m_maxSpeed * ( (elapsedTime*elapsedTime) / numberOfSeconds);if (m_currentSpeed > m_maxSpeed)m_currentSpeed = m_maxSpeed;direction *= m_currentSpeed;Vec3 pos = m_matPosition.GetPosition() + direction;m_matPosition.SetPosition(pos);m_matToWorld.SetPosition(pos);m_matFromWorld = m_matToWorld.Inverse();m_object->VSetTransform(&m_matToWorld, &m_matFromWorld);}else{m_currentSpeed = 0.0f;}}

The above is the implementation in the direction. The next article is about scenario and scenario nodes (scene, scenenode )~~

Game framework 9: wasd direction control {movementcontroller}