void DecoScene::PointScreen2WorldRay(const vector2& pt, vector3& outOrigin, vector3& outDir) const
{
vector3 viewVec = PointScreen2Camera(pt);
matrix44 invview;
RI->GetTransform(TT_WorldToCamera, invview);
invview.invert();
if (camera->isOrthogonal())
{
vector4 viewOrigin(viewVec);
viewOrigin.z = 0.f;
vector4 viewDir(0, 0, -1, 0);
viewOrigin.w = 1.f;
viewOrigin = invview * vector4(viewOrigin);
vector4 worldVec = invview * viewDir;
outOrigin = vector3(viewOrigin.x, viewOrigin.y, viewOrigin.z);
outDir = vector3(worldVec.x, worldVec.y, worldVec.z);
}
else
{
viewVec.normalize();
outOrigin = camera->getEye();
vector4 worldVec = invview * vector4(viewVec);
outDir = vector3(worldVec.x, worldVec.y, worldVec.z);
}
}
Vector3 PerspectiveCamera::samplePosition(const Sample& sample,
Vector3* surfaceNormal, float* pdfArea) const {
Vector3 pCamera;
if (mLensRadius > 0.0f) {
Vector2 lensSample = mLensRadius *
uniformSampleDisk(sample.lensU1, sample.lensU2);
Vector3 viewOrigin(lensSample.x, lensSample.y, 0.0f);
pCamera = mOrientation * viewOrigin + mPosition;
} else {
pCamera = mPosition;
}
if (pdfArea) {
*pdfArea = mLensRadius > 0.0f ?
1.0f / (mLensRadius * mLensRadius * PI) : 1.0f;
}
*surfaceNormal = getLook();
return pCamera;
}
static void UpdateProjectionMatrix(FSceneView* View, FMatrix OffAxisMatrix)
{
View->ProjectionMatrixUnadjustedForRHI = OffAxisMatrix;
FVector viewOrigin(0.0f, 0.0f, View->ProjectionMatrixUnadjustedForRHI.M[3][3]);
View->ViewMatrices.ViewMatrix.SetOrigin(View->ViewMatrices.ViewMatrix.GetOrigin() - viewOrigin);
View->InvViewMatrix = View->ViewMatrices.ViewMatrix.Inverse();
View->ViewMatrices.ViewOrigin += View->InvViewMatrix.TransformPosition(-viewOrigin);
View->ViewMatrices.PreViewTranslation = -View->ViewMatrices.ViewOrigin;
View->ViewMatrices.ProjMatrix = _AdjustProjectionMatrixForRHI(View->ProjectionMatrixUnadjustedForRHI);
View->ViewProjectionMatrix = View->ViewMatrices.GetViewProjMatrix();
View->InvViewProjectionMatrix = View->ViewMatrices.GetInvProjMatrix() * View->InvViewMatrix;
FMatrix TranslatedViewMatrix = FTranslationMatrix(-View->ViewMatrices.PreViewTranslation) * View->ViewMatrices.ViewMatrix;
View->ViewMatrices.TranslatedViewProjectionMatrix = TranslatedViewMatrix * View->ViewMatrices.ProjMatrix;
View->ViewMatrices.InvTranslatedViewProjectionMatrix = View->ViewMatrices.TranslatedViewProjectionMatrix.Inverse();
View->ShadowViewMatrices = View->ViewMatrices;
//View->InvDeviceZToWorldZTransform = CreateInvDeviceZToWorldZTransform(View->ProjectionMatrixUnadjustedForRHI);
GetViewFrustumBounds(View->ViewFrustum, View->ViewProjectionMatrix, false);
}