/** Loc is an anchor point in the world to guide which part of the infinite plane to draw. */
void DrawDebugSolidPlane(const UWorld* InWorld, FPlane const& P, FVector const& Loc, float Size, FColor const& Color, bool bPersistent, float LifeTime, uint8 DepthPriority)
{
// no debug line drawing on dedicated server
if (GEngine->GetNetMode(InWorld) != NM_DedicatedServer)
{
FVector const ClosestPtOnPlane = Loc - P.PlaneDot(Loc) * P;
FVector U, V;
P.FindBestAxisVectors(U, V);
U *= Size;
V *= Size;
TArray<FVector> Verts;
Verts.AddUninitialized(4);
Verts[0] = ClosestPtOnPlane + U + V;
Verts[1] = ClosestPtOnPlane - U + V;
Verts[2] = ClosestPtOnPlane + U - V;
Verts[3] = ClosestPtOnPlane - U - V;
TArray<int32> Indices;
Indices.AddUninitialized(6);
Indices[0] = 0; Indices[1] = 2; Indices[2] = 1;
Indices[3] = 1; Indices[4] = 2; Indices[5] = 3;
// plane quad
DrawDebugMesh(InWorld, Verts, Indices, Color, bPersistent, LifeTime, DepthPriority);
// arrow indicating normal
DrawDebugDirectionalArrow(InWorld, ClosestPtOnPlane, ClosestPtOnPlane + P * 16.f, 8.f, FColor::White, bPersistent, LifeTime, DepthPriority);
}
}
FPoly FPoly::BuildInfiniteFPoly(const FPlane& InPlane)
{
FVector Axis1, Axis2;
// Find two non-problematic axis vectors.
InPlane.FindBestAxisVectors( Axis1, Axis2 );
// Set up the FPoly.
FPoly EdPoly;
EdPoly.Init();
EdPoly.Normal.X = InPlane.X;
EdPoly.Normal.Y = InPlane.Y;
EdPoly.Normal.Z = InPlane.Z;
EdPoly.Base = EdPoly.Normal * InPlane.W;
EdPoly.Vertices.Add( EdPoly.Base + Axis1*HALF_WORLD_MAX + Axis2*HALF_WORLD_MAX );
EdPoly.Vertices.Add( EdPoly.Base - Axis1*HALF_WORLD_MAX + Axis2*HALF_WORLD_MAX );
EdPoly.Vertices.Add( EdPoly.Base - Axis1*HALF_WORLD_MAX - Axis2*HALF_WORLD_MAX );
EdPoly.Vertices.Add( EdPoly.Base + Axis1*HALF_WORLD_MAX - Axis2*HALF_WORLD_MAX );
return EdPoly;
}
