void FogDemo::UpdateAmbientLight(const GameTime& gameTime)
{
static float ambientIntensity = 0.0f;
if (mGamePad->IsButtonHeldDown(GamePadButton::X) && ambientIntensity < 1.0f)
{
ambientIntensity += static_cast<float>(gameTime.GetElapsedSeconds());
ambientIntensity = min(ambientIntensity, 1.0f);
mPixelCBufferPerFrameData.AmbientColor = XMFLOAT4(ambientIntensity, ambientIntensity, ambientIntensity, 1.0f);
}
if (mGamePad->IsButtonHeldDown(GamePadButton::Y) && ambientIntensity > 0.0f)
{
ambientIntensity -= (float)gameTime.GetElapsedSeconds();
ambientIntensity = max(ambientIntensity, 0.0f);
mPixelCBufferPerFrameData.AmbientColor = XMFLOAT4(ambientIntensity, ambientIntensity, ambientIntensity, 1.0f);
}
}
void FogDemo::UpdateSpecularLight(const GameTime& gameTime)
{
static float specularIntensity = 1.0f;
if (mGamePad->IsButtonHeldDown(GamePadButton::DPadUp) && specularIntensity < 1.0f)
{
specularIntensity += static_cast<float>(gameTime.GetElapsedSeconds());
specularIntensity = min(specularIntensity, 1.0f);
mPixelCBufferPerObjectData.SpecularColor = XMFLOAT3(specularIntensity, specularIntensity, specularIntensity);
}
if (mGamePad->IsButtonHeldDown(GamePadButton::DPadDown) && specularIntensity > 0.0f)
{
specularIntensity -= (float)gameTime.GetElapsedSeconds();
specularIntensity = max(specularIntensity, 0.0f);
mPixelCBufferPerObjectData.SpecularColor = XMFLOAT3(specularIntensity, specularIntensity, specularIntensity);
}
static float specularPower = mPixelCBufferPerObjectData.SpecularPower;
if (mGamePad->IsButtonHeldDown(GamePadButton::RightShoulder) && specularPower < UCHAR_MAX)
{
specularPower += LightModulationRate * static_cast<float>(gameTime.GetElapsedSeconds());
specularPower = min(specularPower, static_cast<float>(UCHAR_MAX));
mPixelCBufferPerObjectData.SpecularPower = specularPower;
}
if (mGamePad->IsButtonHeldDown(GamePadButton::LeftShoulder) && specularPower > 1.0f)
{
specularPower -= LightModulationRate * static_cast<float>(gameTime.GetElapsedSeconds());
specularPower = max(specularPower, 1.0f);
mPixelCBufferPerObjectData.SpecularPower = specularPower;
}
}
void FogDemo::UpdateDirectionalLight(const GameTime& gameTime)
{
static float directionalIntensity = 1.0f;
float elapsedTime = static_cast<float>(gameTime.GetElapsedSeconds());
if (mGamePad != nullptr)
{
auto gamePadState = mGamePad->CurrentState();
if (gamePadState.IsConnected())
{
// Update directional light intensity
if (mGamePad->IsButtonHeldDown(GamePadButton::A) && directionalIntensity < 1.0f)
{
directionalIntensity += elapsedTime;
directionalIntensity = min(directionalIntensity, 1.0f);
mPixelCBufferPerFrameData.LightColor = XMFLOAT4(directionalIntensity, directionalIntensity, directionalIntensity, 1.0f);
mDirectionalLight->SetColor(mPixelCBufferPerFrameData.LightColor);
}
if (mGamePad->IsButtonHeldDown(GamePadButton::B) && directionalIntensity > 0.0f)
{
directionalIntensity -= elapsedTime;
directionalIntensity = max(directionalIntensity, 0.0f);
mPixelCBufferPerFrameData.LightColor = XMFLOAT4(directionalIntensity, directionalIntensity, directionalIntensity, 1.0f);
mDirectionalLight->SetColor(mPixelCBufferPerFrameData.LightColor);
}
if (gamePadState.IsLeftTriggerPressed())
{
// Rotate directional light
XMFLOAT2 rotationAmount = Vector2Helper::Zero;
rotationAmount.x = -gamePadState.thumbSticks.rightX;
rotationAmount.y = gamePadState.thumbSticks.rightY;
XMMATRIX lightRotationMatrix = XMMatrixIdentity();
if (rotationAmount.x != 0)
{
lightRotationMatrix = XMMatrixRotationY(rotationAmount.x);
}
if (rotationAmount.y != 0)
{
XMMATRIX lightRotationAxisMatrix = XMMatrixRotationAxis(mDirectionalLight->RightVector(), rotationAmount.y);
lightRotationMatrix *= lightRotationAxisMatrix;
}
if (rotationAmount.x != 0.0f || rotationAmount.y != 0.0f)
{
mDirectionalLight->ApplyRotation(lightRotationMatrix);
mProxyModel->ApplyRotation(lightRotationMatrix);
const XMFLOAT3& lightdirection = mDirectionalLight->Direction();
mVertexCBufferPerFrameData.LightDirection = XMFLOAT4(lightdirection.x, lightdirection.y, lightdirection.z, 0.0f);
}
}
}
}
}
