C++ (Cpp) IvMatrix33::RotationY Examples

Example #1

File: Player.cpp Project: dtbinh/essentialmath

//-------------------------------------------------------------------------------
// @ Player::Update()
//-------------------------------------------------------------------------------
// Main update loop
//-------------------------------------------------------------------------------
void
Player::Update( float dt )
{
    // get scale, rotate, translate for this frame
    float s = 1.0f;
    float r = 0.0f;

    // set up scaling
    if (IvGame::mGame->mEventHandler->IsKeyDown(';'))
    {
        s -= 0.25f*dt;
    }
    if (IvGame::mGame->mEventHandler->IsKeyDown('p'))
    {
        s += 0.25f*dt;
    }
    mScale *= s;
    
    // set up rotate
    if (IvGame::mGame->mEventHandler->IsKeyDown('o'))
    {
        r -= kPI*0.25f*dt;
    }
    if (IvGame::mGame->mEventHandler->IsKeyDown('u'))
    {
        r += kPI*0.25f*dt;
    }
    IvMatrix33 rotate;
    rotate.RotationY(r);
    mRotate = rotate*mRotate;
    
    // set up translation
    IvVector3 xlate;
    xlate.Zero();
    if (IvGame::mGame->mEventHandler->IsKeyDown('k'))
    {
        xlate.x -= 3.0f*dt;
    }
    if (IvGame::mGame->mEventHandler->IsKeyDown('i'))
    {
        xlate.x += 3.0f*dt;
    }
    if (IvGame::mGame->mEventHandler->IsKeyDown('l'))
    {
        xlate.y -= 3.0f*dt;
    }
    if (IvGame::mGame->mEventHandler->IsKeyDown('j'))
    {
        xlate.y += 3.0f*dt;
    }
    mTranslate += xlate;
    
    // clear transform
    if (IvGame::mGame->mEventHandler->IsKeyDown(' '))
    {
        mRotate.Identity();
        mTranslate.Set(0.0f, 0.0f, 0.0f);
        mScale = 3.0f;
    }

}   // End of Player::Update()

Example #2

File: Player.cpp Project: dtbinh/essentialmath

//-------------------------------------------------------------------------------
// @ Player::Update()
//-------------------------------------------------------------------------------
// Main update loop
//-------------------------------------------------------------------------------
void
Player::Update( float dt )
{
    // get scale, rotate, translate for this frame
    float s = 1.0f;
    float r = 0.0f;
    
    // set up scaling
    if (IvGame::mGame->mEventHandler->IsKeyDown(';'))
    {
        s -= 0.25f*dt;
    }
    if (IvGame::mGame->mEventHandler->IsKeyDown('p'))
    {
        s += 0.25f*dt;
    }
    mScale *= s;
    
    // set up rotate
    if (IvGame::mGame->mEventHandler->IsKeyDown('o'))
    {
        r -= kPI*0.25f*dt;
    }
    if (IvGame::mGame->mEventHandler->IsKeyDown('u'))
    {
        r += kPI*0.25f*dt;
    }
    IvMatrix33 rotate;
    rotate.RotationZ(r);
    mRotate = rotate*mRotate;
    
    // set up translation
    IvVector3 xlate;
    xlate.Zero();
    if (IvGame::mGame->mEventHandler->IsKeyDown('k'))
    {
        xlate.x -= 3.0f*dt;
    }
    if (IvGame::mGame->mEventHandler->IsKeyDown('i'))
    {
        xlate.x += 3.0f*dt;
    }
    if (IvGame::mGame->mEventHandler->IsKeyDown('l'))
    {
        xlate.y -= 3.0f*dt;
    }
    if (IvGame::mGame->mEventHandler->IsKeyDown('j'))
    {
        xlate.y += 3.0f*dt;
    }
    mTranslate += xlate;
    
    // clear transform
    if (IvGame::mGame->mEventHandler->IsKeyDown(' '))
    {
        mRotate.Identity();
        mScale = 1.0f;
        mTranslate.Zero();
    }

    r = 0.0f;
    static bool lightDirChanged = true;

    // set up rotate
    if (IvGame::mGame->mEventHandler->IsKeyDown('a'))
    {
        r -= kPI*0.0625f*dt;
        lightDirChanged = true;
    }
    if (IvGame::mGame->mEventHandler->IsKeyDown('d'))
    {
        r += kPI*0.0625f*dt;
        lightDirChanged = true;
    }

    if (lightDirChanged)
    {
        IvMatrix33 rotate;
        rotate.RotationY(r);
       
        mLightPos = rotate * mLightPos;
        mLightPos.Normalize();

        lightDirChanged = false;
    }

}   // End of Player::Update()