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Problems with creating spectator camera with C++

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I have problems with creating spectator camera with C++ using this tutorial


sphere moving faster then camera, but this is not main problem.

I dont understand why, but sphere have the inertia. I mean, when i stop pressing 'w' sphere dont stop movement, just slow down a bit. And also she pushes off from the wall and flies.


I cant understand why it hapends! Please, give me advice. There is my code


#include "App.h"

using namespace Leadwerks;

App::App() : window(NULL), context(NULL), world(NULL), camera(NULL) {}

App::~App() { delete world; delete window; }

Vec3 camRotation;

Vec2 centerMouse;

Vec2 mouseDef;

Vec3 camMovement;

Vec3 Temp;

float MouseSens;

float strafeM;

float moveM;

float forceM;

bool cameraMode;

bool App::Start()


// Создание основных коммпонентов

window = Window::Create("Learning", 0, 0, 1920, 1080, Window::Titlebar);

context = Context::Create(window);

world = World::Create();

camera = Camera::Create();

camera->SetPosition(0, 2, 5);

light = DirectionalLight::Create();


// Определение переменных

MouseSens = 10;

strafeM = 0.4;

moveM = 0.6;

forceM = 1000;

centerMouse = Vec2(context->GetWidth() / 2, context->GetHeight() / 2);


// Создание спектатора


spectator = Model::Sphere(8);

spectator->SetPosition(Vec3(0, 8, 0));

spectator->SetScale(Vec3(5, 5, 5));

Shape* spectatorShape = Shape::Sphere(0, 0, 0, 0, 0, 0, 1, 1, 1);

spectatorShape = Shape::Sphere();





cameraMode = false;

// Загрузка карты




return true;


bool App::Loop()






// Возможность закрыть окно

if (window->Closed() || window->KeyHit(Key::Escape))

return false;

// Переключение между режимами камеры

if (window->KeyHit(Key::P))

cameraMode = !cameraMode;


// Удерживание указателя мыши по центру

Vec3 CMP = window->GetMousePosition();

mouseDef.x = CMP.x - centerMouse.x;

mouseDef.y = CMP.y - centerMouse.y;

window->SetMousePosition(centerMouse.x, centerMouse.y);

// Вращение камеры

camRotation.x += mouseDef.y / MouseSens;

camRotation.y += mouseDef.x / MouseSens;


//Движение камеры

camMovement.x = (window->KeyDown(Key::D) - window->KeyDown(Key::A)) * Time::GetSpeed() * strafeM;

camMovement.y = (window->KeyDown(Key::E) - window->KeyDown(Key::Q)) * Time::GetSpeed() * strafeM;

camMovement.z = (window->KeyDown(Key::W) - window->KeyDown(Key::S)) * Time::GetSpeed() * moveM;


if (cameraMode)




Vec3 tForce = Transform::Vector(camMovement, camera, 0);

spectator->AddForce(camMovement * forceM);






return true;


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The sphere has inertia because you are adding a force to move it.


You could use the SetVelocity() command instead, which will set the speed.

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Hmm...Now there is no any inertia, but spectator not works. I mean, i can go throw walls and other stuff. Weird, in tutorial Jorn using force, and all working perfect.

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