void CameraZoomOut(KFbxScene* pScene, int dY)
{
KFbxCamera* lCamera = GetCurrentCamera(pScene);
if (lCamera)
{
if (lCamera->ProjectionType.Get() == KFbxCamera::ePERSPECTIVE)
{
double lOriginalAperture = sqrt(lCamera->GetApertureWidth());
double lApertureTransform = lOriginalAperture+dY/400.0;
if (lApertureTransform <0.25)
{
lApertureTransform =0.25;
}
if (lApertureTransform*lApertureTransform >179)
{
lApertureTransform = sqrt(179.0);
}
double lApertureH = lApertureTransform/lOriginalAperture*sqrt(lCamera->GetApertureHeight());
double lApertureWidthOrig = lCamera->GetApertureWidth();
double lApertureHeightOrig = lCamera->GetApertureHeight();
if (lCamera->GetApertureMode() == KFbxCamera::eFOCAL_LENGTH) {
double lFLOrig = lCamera->FocalLength.Get();
double lFOVOrig = lCamera->ComputeFieldOfView(lFLOrig); // recompute to be sure.
lCamera->SetApertureWidth(lApertureTransform * lApertureTransform);
lCamera->SetApertureHeight(lApertureH * lApertureH);
double lFLNew = lCamera->ComputeFocalLength(lFOVOrig);
double lFOVNew = lCamera->ComputeFieldOfView(lFLNew);
lCamera->FocalLength.Set(lFLNew);
lCamera->FieldOfView.Set(lFOVNew);
} else if (lCamera->GetApertureMode() == KFbxCamera::eVERTICAL
|| lCamera->GetApertureMode() == KFbxCamera::eHORIZONTAL) {
double lFOVOrig = lCamera->FieldOfView.Get();
double lFLOrig = lCamera->ComputeFocalLength(lFOVOrig); // recompute to be sure.
lCamera->SetApertureWidth(lApertureTransform * lApertureTransform);
lCamera->SetApertureHeight(lApertureH * lApertureH);
double lFOVNew = lCamera->ComputeFieldOfView(lFLOrig);
double lFLNew = lCamera->ComputeFocalLength(lFOVNew);
lCamera->FieldOfView.Set(lFOVNew);
lCamera->FocalLength.Set(lFLNew);
} else if (lCamera->GetApertureMode() == KFbxCamera::eHORIZONTAL_AND_VERTICAL) {
double lFOVOrig = lCamera->FieldOfViewY.Get();
double lFLOrig = lCamera->ComputeFocalLength(lFOVOrig); // recompute to be sure.
lCamera->SetApertureWidth(lApertureTransform * lApertureTransform);
lCamera->SetApertureHeight(lApertureH * lApertureH);
double lFOVNew = lCamera->ComputeFieldOfView(lFLOrig);
double lFLNew = lCamera->ComputeFocalLength(lFOVNew);
lCamera->FieldOfViewY.Set(lFOVNew);
lCamera->FocalLength.Set(lFLNew);
}
lCamera->SetApertureWidth(lApertureWidthOrig);
lCamera->SetApertureHeight(lApertureHeightOrig);
}
else
{
gsOrthoCameraScale *= 1.25;
}
}
}
