/usr/include/libwildmagic/Wm5Picker.h is in libwildmagic-dev 5.13-1ubuntu1.
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// Copyright (c) 1998-2014
// Distributed under the Boost Software License, Version 1.0.
// http://www.boost.org/LICENSE_1_0.txt
// http://www.geometrictools.com/License/Boost/LICENSE_1_0.txt
//
// File Version: 5.0.1 (2010/10/01)
#ifndef WM5PICKER_H
#define WM5PICKER_H
#include "Wm5GraphicsLIB.h"
#include "Wm5PickRecord.h"
#include "Wm5APoint.h"
namespace Wm5
{
class WM5_GRAPHICS_ITEM Picker
{
public:
// Construction and destruction.
Picker ();
~Picker ();
// The linear component is parameterized by P + t*D, where P is a point on
// the component (P is the origin), D is a unit-length direction, and t is
// a scalar in the interval [tmin,tmax] with tmin < tmax. The P and D
// values must be in world coordinates. The choices for tmin and tmax are
// line: tmin = -Mathf::MAX_REAL, tmax = Mathf::MAX_REAL
// ray: tmin = 0, tmax = Mathf::MAX_REAL
// segment: tmin = 0, tmax > 0;
//
// A call to this function will automatically clear the Records array.
// If you need any information from this array obtained by a previous
// call to Execute, you must save it first.
void Execute (Spatial* scene, const APoint& origin,
const AVector& direction, float tmin, float tmax);
// The following three functions return the record satisfying the
// constraints. They should be called only when mRecords.size() > 0.
// Locate the record whose T value is smallest in absolute value.
const PickRecord& GetClosestToZero () const;
// Locate the record with nonnegative T value closest to zero.
const PickRecord& GetClosestNonnegative () const;
// Locate the record with nonpositive T value closest to zero.
const PickRecord& GetClosestNonpositive () const;
// Access to all the records for the pick operation.
std::vector<PickRecord> Records;
private:
// The picking occurs recursively by traversing the input scene.
void ExecuteRecursive (Spatial* object);
APoint mOrigin;
AVector mDirection;
float mTMin, mTMax;
// The value returned if the Get* functions are called when mRecords has
// no elements.
static const PickRecord msInvalid;
};
}
#endif
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