You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
83 lines
2.6 KiB
83 lines
2.6 KiB
3 months ago
|
// David Eberly, Geometric Tools, Redmond WA 98052
|
||
|
|
// Copyright (c) 1998-2021
|
||
|
|
// Distributed under the Boost Software License, Version 1.0.
|
||
|
|
// https://www.boost.org/LICENSE_1_0.txt
|
||
|
|
// https://www.geometrictools.com/License/Boost/LICENSE_1_0.txt
|
||
|
|
// Version: 4.0.2019.08.13
|
||
|
|
|
||
|
|
#pragma once
|
||
|
|
|
||
|
|
#include <Mathematics/IntrIntervals.h>
|
||
|
|
#include <Mathematics/IntrLine2Circle2.h>
|
||
|
|
#include <Mathematics/Ray.h>
|
||
|
|
|
||
|
|
// The queries consider the circle to be a solid (disk).
|
||
|
|
|
||
|
|
namespace gte
|
||
|
|
{
|
||
|
|
template <typename Real>
|
||
|
|
class TIQuery<Real, Ray2<Real>, Circle2<Real>>
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
struct Result
|
||
|
|
{
|
||
|
|
bool intersect;
|
||
|
|
};
|
||
|
|
|
||
|
|
Result operator()(Ray2<Real> const& ray, Circle2<Real> const& circle)
|
||
|
|
{
|
||
|
|
Result result;
|
||
|
|
FIQuery<Real, Ray2<Real>, Circle2<Real>> rcQuery;
|
||
|
|
result.intersect = rcQuery(ray, circle).intersect;
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename Real>
|
||
|
|
class FIQuery<Real, Ray2<Real>, Circle2<Real>>
|
||
|
|
:
|
||
|
|
public FIQuery<Real, Line2<Real>, Circle2<Real>>
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
struct Result
|
||
|
|
:
|
||
|
|
public FIQuery<Real, Line2<Real>, Circle2<Real>>::Result
|
||
|
|
{
|
||
|
|
// No additional information to compute.
|
||
|
|
};
|
||
|
|
|
||
|
|
Result operator()(Ray2<Real> const& ray, Circle2<Real> const& circle)
|
||
|
|
{
|
||
|
|
Result result;
|
||
|
|
DoQuery(ray.origin, ray.direction, circle, result);
|
||
|
|
for (int i = 0; i < result.numIntersections; ++i)
|
||
|
|
{
|
||
|
|
result.point[i] = ray.origin + result.parameter[i] * ray.direction;
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
protected:
|
||
|
|
void DoQuery(Vector2<Real> const& rayOrigin,
|
||
|
|
Vector2<Real> const& rayDirection, Circle2<Real> const& circle,
|
||
|
|
Result& result)
|
||
|
|
{
|
||
|
|
FIQuery<Real, Line2<Real>, Circle2<Real>>::DoQuery(rayOrigin,
|
||
|
|
rayDirection, circle, result);
|
||
|
|
|
||
|
|
if (result.intersect)
|
||
|
|
{
|
||
|
|
// The line containing the ray intersects the disk; the
|
||
|
|
// t-interval is [t0,t1]. The ray intersects the disk as long
|
||
|
|
// as [t0,t1] overlaps the ray t-interval [0,+infinity).
|
||
|
|
std::array<Real, 2> rayInterval = { (Real)0, std::numeric_limits<Real>::max() };
|
||
|
|
FIQuery<Real, std::array<Real, 2>, std::array<Real, 2>> iiQuery;
|
||
|
|
auto iiResult = iiQuery(result.parameter, rayInterval);
|
||
|
|
result.intersect = iiResult.intersect;
|
||
|
|
result.numIntersections = iiResult.numIntersections;
|
||
|
|
result.parameter = iiResult.overlap;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
}
|