stuff-from-scratch/src/rendering/mesh/TriFace.cpp
2023-01-17 10:13:25 +00:00

108 lines
2.2 KiB
C++

#include "TriFace.h"
#include "Edge.h"
#include "Node.h"
TriFace::TriFace(Edge* edge0, Edge* edge1, Edge* edge2, std::size_t id)
: AbstractFace(id),
mEdge0(edge0),
mEdge1(edge1),
mEdge2(edge2)
{
}
std::unique_ptr<TriFace> TriFace::Create(Edge* edge0, Edge* edge1, Edge* edge2, std::size_t id)
{
return std::make_unique<TriFace>(edge0, edge1, edge2, id);
}
TriFace::~TriFace()
{
}
std::vector<std::size_t> TriFace::getNodeIds() const
{
return {mEdge0->getNode0Id(), mEdge0->getNode1Id(), mEdge1->getNode1Id()};
}
std::size_t TriFace::getNumNodes() const
{
return 3;
}
void TriFace::replaceEdge(Edge* original, Edge* replacement)
{
if (original == mEdge0)
{
mEdge0 = replacement;
}
else if (original == mEdge1)
{
mEdge1 = replacement;
}
else if (original == mEdge2)
{
mEdge2 = replacement;
}
}
std::size_t TriFace::getEdge0Id () const
{
return mEdge0->getId();
}
std::size_t TriFace::getEdge1Id () const
{
return mEdge1->getId();
}
std::size_t TriFace::getEdge2Id () const
{
return mEdge2->getId();
}
std::vector<std::size_t> TriFace::getEdgeIds() const
{
return {mEdge0->getId(), mEdge1->getId(), mEdge2->getId()};
}
void TriFace::associateWidthEdges()
{
mEdge0->associateFace(mId);
mEdge1->associateFace(mId);
mEdge2->associateFace(mId);
}
std::vector<Point> TriFace::getNodeLocations(Orientation orientation) const
{
if (orientation != getOrientation())
{
return { mEdge0->getNode0()->getPoint(), mEdge0->getNode1()->getPoint(), mEdge1->getNode1()->getPoint() };
}
else
{
return { mEdge0->getNode0()->getPoint(), mEdge1->getNode1()->getPoint(), mEdge0->getNode1()->getPoint() };
}
}
Vector TriFace::getNormal() const
{
auto v0 = mEdge0->getNode0()->getPoint().getDelta(mEdge0->getNode1()->getPoint());
auto v1 = mEdge0->getNode0()->getPoint().getDelta(mEdge1->getNode1()->getPoint());
return v0.crossProduct(v1).getNormalized();
}
AbstractFace::Orientation TriFace::getOrientation() const
{
Vector z_norm(0, 0, 1);
if (z_norm.dotProduct(getNormal()) < 0.0)
{
return Orientation::CW;
}
else
{
return Orientation::CCW;
}
}