cameraMovements.cpp

POINT mouseLastPos;

Vector4 position;
float elevation, azimut;
int trX, trZ;

void MyC3DEngine::Setup(HWND hWnd)
{
    position = Vector4(0.0, -50.0, 0.0, true);

    elevation = 0.0f;
    azimut = 0.0f;

    // Mouse Position
    mouseLastPos.x = 0.0f;
    mouseLastPos.y = 0.0f;
}

void MyC3DEngine::Update(float fDT)
{
    if ((trZ != 0) || (trX !=0))
        position += (Matrix4::rotationX(elevation) * Matrix4::rotationY(azimut)).transpose() * Vector4((float)trX, 0.0f, (float)trZ);

    trX = 0;
    trZ = 0;
}

void MyC3DEngine::Render(unsigned int u32Width, unsigned int u32Height)
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();

    Matrix4 view = Matrix4::rotationX(elevation) * Matrix4::rotationY(azimut) * Matrix4::translation(&position);

    glEnable(GL_DEPTH_TEST);

    // YOUR CODE HERE

    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective(70.0, (GLdouble)u32Width / (GLdouble)u32Height, 0.5, 100.0);
}

void MyC3DEngine::MouseMove(POINT Pos)
{
    azimut -= (Pos.x - mouseLastPos.x) * MOUSE_SPEED;

    elevation += (Pos.y - mouseLastPos.y) * MOUSE_SPEED;
    if (elevation >= halfMpi) elevation = halfMpi;
    else if (elevation <= -halfMpi) elevation = -halfMpi;

    mouseLastPos = Pos;
}

void MyC3DEngine::KeyDown(int s32VirtualKey)
{
    switch (s32VirtualKey) {
    case VK_LEFT:
        trX = 1;
        break;
    case VK_RIGHT:
        trX = -1;
        break;
    case VK_UP:
        trZ = 1;
        break;
    case VK_DOWN:
        trZ = -1;
        break;
    default : break;
    }
}