bool LightLx::Initialize(ID3D11Device* device)
{
HRESULT hr;
hr = GenerateViewMatrix();
if (FAILED(hr))
{
return false;
}
hr = GenerateProjectionMatrix();
if (FAILED(hr))
{
return false;
}
return true;
}
void Camera::Update(float ElapsedTime){
//---------------------------------------------
//TODO: Camera shouldn't move beneath the floor
// so we need to check with a heightmap or
// for now probably just the y = -20 plane.
//---------------------------------------------
bool MatrixChanged = false;
Vector3 TargetPos = (mFollowingObject ? mObject->position : mFollowPosition);
Vector3 ToMove = TargetPos - position;
float dist = ToMove.length();
//1. Camera position
//We only need to move if the camera is not at the player
if( dist > 0 ){
//If the camera is really far away OR really close to the object and the object is not moving
//then just teleport the camera to the exact object position
if( dist > 100.0f || (mFollowingObject && !mObject->movement.isZeroLength() && dist < 0.1f) ){
position = TargetPos;
}else{ //We are at a normal distance from the object. Let camera fly with normal speed
//ToMove already has a length, so if the camera is further away from the player,
//then the camera will go faster.
//When the object is moving in a single direction then the camera will be (PlayerSpeed/2.0f) units behind the object
position += ToMove * 2.0f * ElapsedTime;
}
MatrixChanged = true;
}
//2. Camera rotation
if( mFreeRotation ){
if( mCamYawSpeed ){
if( mCamYawSpeed > 1.5f*PI ) mCamYawSpeed = 1.5f*PI;
if( mCamYawSpeed < -1.5f*PI ) mCamYawSpeed = -1.5f*PI;
yaw += mCamYawSpeed * ElapsedTime;
MatrixChanged = true;
DeAccelerate(mCamYawSpeed, 3.5f * ElapsedTime); //Deacceleration of 3.5 radians per second per second
}
if( mCamPitchSpeed ){
if( mCamPitchSpeed > PI ) mCamPitchSpeed = PI;
else if( mCamPitchSpeed < -PI ) mCamPitchSpeed = -PI;
pitch += mCamPitchSpeed * ElapsedTime;
MatrixChanged = true;
//Decrease the speed (which causes a natural 'slow down')
DeAccelerate(mCamPitchSpeed, 3.5f * ElapsedTime); //Deacceleration of 3.5 radians per second per second
}
}else{
mCamYawSpeed = 0;
mCamPitchSpeed = 0;
if( mFollowingObject ){
if( yaw != mObject->yaw || pitch != mObject->pitch ) MatrixChanged = true;
yaw = mObject->yaw;
pitch = mObject->pitch;
}
}
//3. Camera zoom
if( mCamZoomSpeed ){
if( mCamZoomSpeed > 60 ) mCamZoomSpeed = 60;
else if( mCamZoomSpeed < -60 ) mCamZoomSpeed = -60;
//Adjust the zoom with the speed
mCamDist += mCamZoomSpeed * ElapsedTime;
MatrixChanged = true;
//Make sure it does not zoom in or out too far
if( mCamDist < MinCamDist ){ mCamDist = MinCamDist; mCamZoomSpeed = 0; }
else if( mCamDist > MaxCamDist ){ mCamDist = MaxCamDist; mCamZoomSpeed = 0; }
//Decrease the speed (which causes a natural 'slow down')
DeAccelerate(mCamZoomSpeed, 700 * ElapsedTime); //Deacceleration of 700 units per second per second
}
if( MatrixChanged ) GenerateViewMatrix();
}
