/**
* Util to find the normal of the face that we hit.
* @param PHit - incoming hit from PhysX
* @param TraceDirectionDenorm - direction of sweep test (not normalized)
* @param OutNormal - normal we may recompute based on the faceIndex of the hit
* @return true if we compute a new normal for the geometry.
*/
static bool FindGeomOpposingNormal(const PxLocationHit& PHit, const FVector& TraceDirectionDenorm, FVector& OutNormal)
{
checkf(InvalidQueryHit.faceIndex == 0xFFFFffff, TEXT("Engine code needs fixing: PhysX invalid face index sentinel has changed or is not part of default PxQueryHit!"));
if (PHit.faceIndex == InvalidQueryHit.faceIndex)
{
return false;
}
PxGeometryType::Enum GeomType = PHit.shape->getGeometryType();
switch (GeomType)
{
case PxGeometryType::eSPHERE:
case PxGeometryType::eBOX:
case PxGeometryType::eCAPSULE:
return FindSimpleOpposingNormal(PHit, TraceDirectionDenorm, OutNormal);
case PxGeometryType::eCONVEXMESH:
return FindConvexMeshOpposingNormal(PHit, TraceDirectionDenorm, OutNormal);
case PxGeometryType::eHEIGHTFIELD:
return FindHeightFieldOpposingNormal(PHit, TraceDirectionDenorm, OutNormal);
case PxGeometryType::eTRIANGLEMESH:
return FindTriMeshOpposingNormal(PHit, TraceDirectionDenorm, OutNormal);
default:
check(false); //unsupported geom type
}
return false;
}
/**
* Util to find the normal of the face that we hit. Will use faceIndex from the hit if possible.
* @param PHit - incoming hit from PhysX
* @param TraceDirectionDenorm - direction of sweep test (not normalized)
* @param InNormal - default value in case no new normal is computed.
* @return New normal we compute for geometry.
*/
static FVector FindGeomOpposingNormal(PxGeometryType::Enum QueryGeomType, const PxLocationHit& PHit, const FVector& TraceDirectionDenorm, const FVector InNormal)
{
// TODO: can we support other shapes here as well?
if (QueryGeomType == PxGeometryType::eCAPSULE || QueryGeomType == PxGeometryType::eSPHERE)
{
PxGeometryType::Enum GeomType = PHit.shape->getGeometryType();
switch (GeomType)
{
case PxGeometryType::eSPHERE:
case PxGeometryType::eCAPSULE: return FindSimpleOpposingNormal(PHit, TraceDirectionDenorm, InNormal);
case PxGeometryType::eBOX: return FindBoxOpposingNormal(PHit, TraceDirectionDenorm, InNormal);
case PxGeometryType::eCONVEXMESH: return FindConvexMeshOpposingNormal(PHit, TraceDirectionDenorm, InNormal);
case PxGeometryType::eHEIGHTFIELD: return FindHeightFieldOpposingNormal(PHit, TraceDirectionDenorm, InNormal);
case PxGeometryType::eTRIANGLEMESH: return FindTriMeshOpposingNormal(PHit, TraceDirectionDenorm, InNormal);
default: check(false); //unsupported geom type
}
}
return InNormal;
}
