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re3/src/collision/ColSphere.cpp
Sergeanur 9bb8ebaa10 Make collision code placement more like original (+ small fixes)
# Conflicts:
#	premake5.lua
#	src/CMakeLists.txt
#	src/collision/Collision.cpp
#	src/core/Collision.h
2020-11-16 00:36:54 +02:00

27 lines
671 B
C++

#include "common.h"
#include "ColSphere.h"
#include "General.h"
void
CColSphere::Set(float radius, const CVector &center, uint8 surf, uint8 piece)
{
this->radius = radius;
this->center = center;
this->surface = surf;
this->piece = piece;
}
bool
CColSphere::IntersectRay(CVector const& from, CVector const& dir, CVector &entry, CVector &exit)
{
CVector distToCenter = from - center;
float distToTouchSqr = distToCenter.MagnitudeSqr() - sq(radius);
float root1, root2;
if (!CGeneral::SolveQuadratic(1.0f, DotProduct(distToCenter, dir) * 2.f, distToTouchSqr, root1, root2))
return false;
entry = from + dir * root1;
exit = from + dir * root2;
return true;
}