void FBXSceneEncoder::loadCamera(FbxNode* fbxNode, Node* node)
{
FbxCamera* fbxCamera = fbxNode->GetCamera();
if (!fbxCamera)
{
return;
}
Camera* camera = new Camera();
const char* name = fbxNode->GetName();
if (name)
{
string id(name);
id.append("_Camera");
camera->setId(id);
}
// Clip planes have to by divided by the forward scale of the camera (x-axis) to get right values
float scale = (float)fbxCamera->GetNode()->LclScaling.Get()[0];
camera->setAspectRatio(getAspectRatio(fbxCamera));
camera->setNearPlane((float)fbxCamera->NearPlane.Get() / scale);
camera->setFarPlane((float)fbxCamera->FarPlane.Get() / scale);
if (fbxCamera->ProjectionType.Get() == FbxCamera::eOrthogonal)
{
camera->setOrthographic();
camera->setViewportWidth((float)fbxCamera->GetApertureWidth());
camera->setViewportWidth((float)fbxCamera->GetApertureHeight());
// xmag in FBX can be calculated from: OrthoZoom * 30.0 / 2.0
camera->setViewportWidth((float)fbxCamera->OrthoZoom.Get() * 15.0f);
}
else if (fbxCamera->ProjectionType.Get() == FbxCamera::ePerspective)
{
camera->setPerspective();
camera->setFieldOfView(getFieldOfView(fbxCamera));
}
else
{
LOG(2, "Warning: Unknown camera type in node.\n");
return;
}
_gamePlayFile.addCamera(camera);
node->setCamera(camera);
}
void CameraZoom(FbxScene* pScene, int pZoomDepth, int pZoomMode)
{
FbxCamera* lCamera = GetCurrentCamera(pScene);
if( lCamera == NULL)
return;
if( pZoomMode == SceneContext::ZOOM_FOCAL_LENGTH)
{
if (lCamera->ProjectionType.Get() == FbxCamera::ePerspective)
{
double lTransform = 0 - pZoomDepth / 100.0;
double lApertureW = lCamera->GetApertureWidth();
lApertureW = TransformAperture( lApertureW, lTransform);
double lApertureH = lCamera->GetApertureHeight();
lApertureH = TransformAperture( lApertureH, lTransform);
UpdatePerspCameraAttributes( lCamera, lApertureW, lApertureH);
}
else
{
if( pZoomDepth > 0)
gsOrthoCameraScale *= 0.8;
else
gsOrthoCameraScale *= 1.25;
}
}
else
{
FbxNode* lCameraNode = lCamera ? lCamera->GetNode() : NULL;
// Compute the camera position and direction.
FbxVector4 lEye(0,0,1);
FbxVector4 lCenter(0,0,0);
FbxVector4 lForward(0,0,0);
if (lCamera)
{
lEye = lCamera->Position.Get();
}
if (lCameraNode && lCameraNode->GetTarget())
{
lCenter = lCameraNode->GetTarget()->LclTranslation.Get();
lForward = lCenter - lEye;
}
else
{
if (!lCameraNode || IsProducerCamera(pScene, lCamera))
{
if (lCamera)
{
lCenter = lCamera->InterestPosition.Get();
lForward = lCenter - lEye;
}
}
else
{
// Get the direction
FbxAMatrix lGlobalRotation;
FbxVector4 lRotationVector( lCameraNode->LclRotation.Get());
lGlobalRotation.SetR(lRotationVector);
// Set the center.
// A camera with rotation = {0,0,0} points to the X direction. So create a
// vector in the X direction, rotate that vector by the global rotation amount
// and then position the center by scaling and translating the resulting vector
lRotationVector = FbxVector4(1.0,0,0);
lForward = lGlobalRotation.MultT(lRotationVector);
}
}
lForward.Normalize();
lEye += lForward * pZoomDepth;
FbxDouble3 lPosition(lEye[0], lEye[1], lEye[2]);
lCamera->Position.Set(lPosition);
}
}
// Set the view to the current camera settings.
void SetCamera(FbxScene* pScene,
FbxTime& pTime,
FbxAnimLayer* pAnimLayer,
const FbxArray<FbxNode*>& pCameraArray,
int pWindowWidth, int pWindowHeight)
{
// Find the current camera at the given time.
FbxCamera* lCamera = GetCurrentCamera(pScene, pTime, pAnimLayer, pCameraArray);
if( lCamera == NULL)
return;
FbxNode* lCameraNode = lCamera ? lCamera->GetNode() : NULL;
// Compute the camera position and direction.
FbxVector4 lEye(0,0,1);
FbxVector4 lCenter(0,0,0);
FbxVector4 lUp(0,1,0);
FbxVector4 lForward, lRight;
if (lCamera)
{
lEye = lCamera->Position.Get();
lUp = lCamera->UpVector.Get();
}
if (lCameraNode && lCameraNode->GetTarget())
{
lCenter = GetGlobalPosition(lCameraNode->GetTarget(), pTime).GetT();
}
else
{
if (!lCameraNode || IsProducerCamera(pScene, lCamera))
{
if (lCamera)
lCenter = lCamera->InterestPosition.Get();
}
else
{
// Get the direction
FbxAMatrix lGlobalRotation;
FbxVector4 lRotationVector(GetGlobalPosition(lCameraNode, pTime).GetR());
lGlobalRotation.SetR(lRotationVector);
// Get the length
FbxVector4 lInterestPosition(lCamera->InterestPosition.Get());
FbxVector4 lCameraGlobalPosition(GetGlobalPosition(lCameraNode, pTime).GetT());
double lLength = (FbxVector4(lInterestPosition - lCameraGlobalPosition).Length());
// Set the center.
// A camera with rotation = {0,0,0} points to the X direction. So create a
// vector in the X direction, rotate that vector by the global rotation amount
// and then position the center by scaling and translating the resulting vector
lRotationVector = FbxVector4(1.0,0,0);
lCenter = lGlobalRotation.MultT(lRotationVector);
lCenter *= lLength;
lCenter += lEye;
// Update the default up vector with the camera rotation.
lRotationVector = FbxVector4(0,1.0,0);
lUp = lGlobalRotation.MultT(lRotationVector);
}
}
// Align the up vector.
lForward = lCenter - lEye;
lForward.Normalize();
lRight = lForward.CrossProduct(lUp);
lRight.Normalize();
lUp = lRight.CrossProduct(lForward);
lUp.Normalize();
// Rotate the up vector with the roll value.
double lRadians = 0;
if (lCamera)
lRadians = lCamera->Roll.Get() * FBXSDK_PI_DIV_180;
lUp = lUp * cos( lRadians) + lRight * sin(lRadians);
double lNearPlane = 0.01;
if (lCamera)
lNearPlane = lCamera->GetNearPlane();
double lFarPlane = 4000.0;
if (lCamera)
lFarPlane = lCamera->GetFarPlane();
//Get global scaling.
FbxVector4 lCameraScaling = GetGlobalPosition(lCameraNode, pTime).GetS();
static const int FORWARD_SCALE = 2;
//scaling near plane and far plane
lNearPlane *= lCameraScaling[ FORWARD_SCALE];
lFarPlane *= lCameraScaling[ FORWARD_SCALE];
// Get the relevant camera settings for a perspective view.
if (lCamera && lCamera->ProjectionType.Get() == FbxCamera::ePerspective)
{
//get the aspect ratio
FbxCamera::EAspectRatioMode lCamAspectRatioMode = lCamera->GetAspectRatioMode();
double lAspectX = lCamera->AspectWidth.Get(); //ºñÀ²
double lAspectY = lCamera->AspectHeight.Get();
double lAspectRatio = 1.333333;
switch( lCamAspectRatioMode)
{
case FbxCamera::eWindowSize:
lAspectRatio = lAspectX / lAspectY;
break;
case FbxCamera::eFixedRatio:
lAspectRatio = lAspectX;
break;
case FbxCamera::eFixedResolution:
lAspectRatio = lAspectX / lAspectY * lCamera->GetPixelRatio();
break;
case FbxCamera::eFixedWidth:
lAspectRatio = lCamera->GetPixelRatio() / lAspectY;
break;
case FbxCamera::eFixedHeight:
lAspectRatio = lCamera->GetPixelRatio() * lAspectX;
break;
default:
break;
}
//get the aperture ratio
double lFilmHeight = lCamera->GetApertureHeight();
double lFilmWidth = lCamera->GetApertureWidth() * lCamera->GetSqueezeRatio();
//here we use Height : Width
double lApertureRatio = lFilmHeight / lFilmWidth;
//change the aspect ratio to Height : Width
lAspectRatio = 1 / lAspectRatio;
//revise the aspect ratio and aperture ratio
FbxCamera::EGateFit lCameraGateFit = lCamera->GateFit.Get();
switch( lCameraGateFit )
{
case FbxCamera::eFitFill:
if( lApertureRatio > lAspectRatio) // the same as eHORIZONTAL_FIT
{
lFilmHeight = lFilmWidth * lAspectRatio;
lCamera->SetApertureHeight( lFilmHeight);
lApertureRatio = lFilmHeight / lFilmWidth;
}
else if( lApertureRatio < lAspectRatio) //the same as eVERTICAL_FIT
{
lFilmWidth = lFilmHeight / lAspectRatio;
lCamera->SetApertureWidth( lFilmWidth);
lApertureRatio = lFilmHeight / lFilmWidth;
}
break;
case FbxCamera::eFitVertical:
lFilmWidth = lFilmHeight / lAspectRatio;
lCamera->SetApertureWidth( lFilmWidth);
lApertureRatio = lFilmHeight / lFilmWidth;
break;
case FbxCamera::eFitHorizontal:
lFilmHeight = lFilmWidth * lAspectRatio;
lCamera->SetApertureHeight( lFilmHeight);
lApertureRatio = lFilmHeight / lFilmWidth;
break;
case FbxCamera::eFitStretch:
lAspectRatio = lApertureRatio;
break;
case FbxCamera::eFitOverscan:
if( lFilmWidth > lFilmHeight)
{
lFilmHeight = lFilmWidth * lAspectRatio;
}
else
{
lFilmWidth = lFilmHeight / lAspectRatio;
}
lApertureRatio = lFilmHeight / lFilmWidth;
break;
case FbxCamera::eFitNone:
default:
break;
}
//change the aspect ratio to Width : Height
lAspectRatio = 1 / lAspectRatio;
double lFieldOfViewX = 0.0;
double lFieldOfViewY = 0.0;
if ( lCamera->GetApertureMode() == FbxCamera::eVertical)
{
lFieldOfViewY = lCamera->FieldOfView.Get();
lFieldOfViewX = VFOV2HFOV( lFieldOfViewY, 1 / lApertureRatio);
}
else if (lCamera->GetApertureMode() == FbxCamera::eHorizontal)
{
lFieldOfViewX = lCamera->FieldOfView.Get(); //get HFOV
lFieldOfViewY = HFOV2VFOV( lFieldOfViewX, lApertureRatio);
}
else if (lCamera->GetApertureMode() == FbxCamera::eFocalLength)
{
lFieldOfViewX = lCamera->ComputeFieldOfView(lCamera->FocalLength.Get()); //get HFOV
lFieldOfViewY = HFOV2VFOV( lFieldOfViewX, lApertureRatio);
}
else if (lCamera->GetApertureMode() == FbxCamera::eHorizAndVert) {
lFieldOfViewX = lCamera->FieldOfViewX.Get();
lFieldOfViewY = lCamera->FieldOfViewY.Get();
}
double lRealScreenRatio = (double)pWindowWidth / (double)pWindowHeight;
int lViewPortPosX = 0,
lViewPortPosY = 0,
lViewPortSizeX = pWindowWidth,
lViewPortSizeY = pWindowHeight;
//compute the view port
if( lRealScreenRatio > lAspectRatio)
{
lViewPortSizeY = pWindowHeight;
lViewPortSizeX = (int)( lViewPortSizeY * lAspectRatio);
lViewPortPosY = 0;
lViewPortPosX = (int)((pWindowWidth - lViewPortSizeX) * 0.5);
}
else
{
lViewPortSizeX = pWindowWidth;
lViewPortSizeY = (int)(lViewPortSizeX / lAspectRatio);
lViewPortPosX = 0;
lViewPortPosY = (int)((pWindowHeight - lViewPortSizeY) * 0.5);
}
//revise the Perspective since we have film offset
double lFilmOffsetX = lCamera->FilmOffsetX.Get();
double lFilmOffsetY = lCamera->FilmOffsetY.Get();
lFilmOffsetX = 0 - lFilmOffsetX / lFilmWidth * 2.0;
lFilmOffsetY = 0 - lFilmOffsetY / lFilmHeight * 2.0;
GlSetCameraPerspective( lFieldOfViewY, lAspectRatio, lNearPlane, lFarPlane, lEye, lCenter, lUp, lFilmOffsetX, lFilmOffsetY);
//glMatrixMode(GL_PROJECTION);
//double lTestPerpMatrix[ 16];
//glGetDoublev( GL_PROJECTION_MATRIX, lTestPerpMatrix);
//lTestPerpMatrix[ 8] -= lFilmOffsetX;
//lTestPerpMatrix[ 9] -= lFilmOffsetY;
//
//glLoadMatrixd( lTestPerpMatrix);
//glMatrixMode(GL_MODELVIEW);
glViewport( lViewPortPosX, lViewPortPosY, lViewPortSizeX, lViewPortSizeY);
}
// Get the relevant camera settings for an orthogonal view.
else
{
double lPixelRatio = 1.0;
if (lCamera)
lPixelRatio = lCamera->GetPixelRatio();
double lLeftPlane, lRightPlane, lBottomPlane, lTopPlane;
if(pWindowWidth < pWindowHeight)
{
lLeftPlane = -gsOrthoCameraScale * lPixelRatio;
lRightPlane = gsOrthoCameraScale * lPixelRatio;
lBottomPlane = -gsOrthoCameraScale * pWindowHeight / pWindowWidth;
lTopPlane = gsOrthoCameraScale * pWindowHeight / pWindowWidth;
}
else
{
pWindowWidth *= (int) lPixelRatio;
lLeftPlane = -gsOrthoCameraScale * pWindowWidth / pWindowHeight;
lRightPlane = gsOrthoCameraScale * pWindowWidth / pWindowHeight;
lBottomPlane = -gsOrthoCameraScale;
lTopPlane = gsOrthoCameraScale;
}
GlSetCameraOrthogonal(lLeftPlane,
lRightPlane,
lBottomPlane,
lTopPlane,
lNearPlane,
lFarPlane,
lEye,
lCenter,
lUp);
}
}