void CTrajectory::DrawPoint( const Ogre::Vector3& Pos )
{
Ogre::Vector3 dx = mPointSize/2*Ogre::Vector3::UNIT_X;
Ogre::Vector3 dy = mPointSize/2*Ogre::Vector3::UNIT_Y;
Ogre::Vector3 dz = mPointSize/2*Ogre::Vector3::UNIT_Z;
Ogre::Vector3 Vertices[8];
Vertices[0] = Pos + dx + dy + dz;
Vertices[1] = Pos + dx - dy + dz;
Vertices[2] = Pos + dx - dy - dz;
Vertices[3] = Pos + dx + dy - dz;
Vertices[4] = Pos - dx + dy + dz;
Vertices[5] = Pos - dx + dy - dz;
Vertices[6] = Pos - dx - dy - dz;
Vertices[7] = Pos - dx - dy + dz;
BuildQuad( Vertices, mColour );
BuildQuad( Vertices + 4, mColour );
BuildLine( Vertices[1], Vertices[7], mColour );
BuildLine( Vertices[2], Vertices[6], mColour );
BuildLine( Vertices[0], Vertices[4], mColour);
BuildLine( Vertices[3], Vertices[5], mColour);
Ogre::Vector3 Top[4] = { Vertices[0], Vertices[4], Vertices[7], Vertices[1] };
Ogre::Vector3 Bottom[4] = { Vertices[2], Vertices[6], Vertices[5], Vertices[3] };
Ogre::Vector3 Left[4] = { Vertices[1], Vertices[7], Vertices[6], Vertices[2] };
Ogre::Vector3 Right[4] = { Vertices[0], Vertices[3], Vertices[5], Vertices[4] };
BuildFilledQuad( Vertices, mColour, 0.5f );
BuildFilledQuad( Vertices + 4, mColour, 0.5f );
BuildFilledQuad( Top, mColour, 0.5f );
BuildFilledQuad( Bottom, mColour, 0.5f );
BuildFilledQuad( Left, mColour, 0.5f );
BuildFilledQuad( Right, mColour, 0.5f );
}
void ASimpleCubeActor::GenerateCube(FProceduralMeshData& MeshData, float Depth, float Width, float Height)
{
// NOTE: Unreal uses an upper-left origin UV
// NOTE: This sample uses a simple UV mapping scheme where each face is the same
// NOTE: For a normal facing towards us, be build the polygon CCW in the order 0-1-2 then 0-2-3 to complete the quad.
// Remember in Unreal, X is forwards, Y is to your right and Z is up.
// Calculate a half offset so we get correct center of object
float DepthOffset = Depth / 2.0f; // X
float WidthOffset = Width / 2.0f; // Y
float HeightOffset = Height / 2.0f; // Z
// Define the 8 corners of the cube
FVector p0 = FVector(DepthOffset, WidthOffset, -HeightOffset);
FVector p1 = FVector(DepthOffset, -WidthOffset, -HeightOffset);
FVector p2 = FVector(DepthOffset, -WidthOffset, HeightOffset);
FVector p3 = FVector(DepthOffset, WidthOffset, HeightOffset);
FVector p4 = FVector(-DepthOffset, WidthOffset, -HeightOffset);
FVector p5 = FVector(-DepthOffset, -WidthOffset, -HeightOffset);
FVector p6 = FVector(-DepthOffset, -WidthOffset, HeightOffset);
FVector p7 = FVector(-DepthOffset, WidthOffset, HeightOffset);
// Now we create 6x faces, 4 vertices each
int32 VertexCount = 6 * 4;
MeshData.Vertices.AddUninitialized(VertexCount);
MeshData.UVs.AddUninitialized(VertexCount);
MeshData.Normals.AddUninitialized(VertexCount);
MeshData.Tangents.AddUninitialized(VertexCount);
int32 VertexOffset = 0;
FVector Normal = FVector::ZeroVector;
FProcMeshTangent Tangent = FProcMeshTangent();
// Front (+X) face: 0-1-2-3
Normal = FVector(1, 0, 0);
Tangent = FProcMeshTangent(0, 1, 0);
VertexOffset = BuildQuad(MeshData, p0, p1, p2, p3, VertexOffset, Normal, Tangent);
// Back (-X) face: 5-4-7-6
Normal = FVector(-1, 0, 0);
Tangent = FProcMeshTangent(0, -1, 0);
VertexOffset = BuildQuad(MeshData, p5, p4, p7, p6, VertexOffset, Normal, Tangent);
// Left (-Y) face: 1-5-6-2
Normal = FVector(0, -1, 0);
Tangent = FProcMeshTangent(1, 0, 0);
VertexOffset = BuildQuad(MeshData, p1, p5, p6, p2, VertexOffset, Normal, Tangent);
// Right (+Y) face: 4-0-3-7
Normal = FVector(0, 1, 0);
Tangent = FProcMeshTangent(-1, 0, 0);
VertexOffset = BuildQuad(MeshData, p4, p0, p3, p7, VertexOffset, Normal, Tangent);
// Top (+Z) face: 6-7-3-2
Normal = FVector(0, 0, 1);
Tangent = FProcMeshTangent(0, 1, 0);
VertexOffset = BuildQuad(MeshData, p6, p7, p3, p2, VertexOffset, Normal, Tangent);
// Bottom (-Z) face: 1-0-4-5
Normal = FVector(0, 0, -1);
Tangent = FProcMeshTangent(0, -1, 0);
VertexOffset = BuildQuad(MeshData, p1, p0, p4, p5, VertexOffset, Normal, Tangent);
}
