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/*
Copyright (C) 2001-2006, William Joseph.
All Rights Reserved.
This file is part of GtkRadiant.
GtkRadiant is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
GtkRadiant is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GtkRadiant; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#if !defined(INCLUDED_SELECTABLE_H)
#define INCLUDED_SELECTABLE_H
#include <cstddef>
#include "math/vector.h"
#include "scenelib.h"
class SelectionIntersection
{
float m_depth;
float m_distance;
public:
SelectionIntersection() : m_depth(1), m_distance(2)
{
}
SelectionIntersection(float depth, float distance) : m_depth(depth), m_distance(distance)
{
}
bool operator<(const SelectionIntersection& other) const
{
if(m_distance != other.m_distance)
{
return m_distance < other.m_distance;
}
if(m_depth != other.m_depth)
{
return m_depth < other.m_depth;
}
return false;
}
bool equalEpsilon(const SelectionIntersection& other, float distanceEpsilon, float depthEpsilon) const
{
return float_equal_epsilon(m_distance, other.m_distance, distanceEpsilon)
&& float_equal_epsilon(m_depth, other.m_depth, depthEpsilon);
}
float depth() const
{
return m_depth;
}
bool valid() const
{
return depth() < 1;
}
};
// returns true if self is closer than other
inline bool SelectionIntersection_closer(const SelectionIntersection& self, const SelectionIntersection& other)
{
return self < other;
}
// assigns other to best if other is closer than best
inline void assign_if_closer(SelectionIntersection& best, const SelectionIntersection& other)
{
if(SelectionIntersection_closer(other, best))
{
best = other;
}
}
class VertexPointer
{
typedef const unsigned char* byte_pointer;
public:
typedef float elem_type;
typedef const elem_type* pointer;
typedef const elem_type& reference;
class iterator
{
public:
iterator() {}
iterator(byte_pointer vertices, std::size_t stride)
: m_iter(vertices), m_stride(stride) {}
bool operator==(const iterator& other) const
{
return m_iter == other.m_iter;
}
bool operator!=(const iterator& other) const
{
return !operator==(other);
}
iterator operator+(std::size_t i)
{
return iterator(m_iter + i * m_stride, m_stride);
}
iterator operator+=(std::size_t i)
{
m_iter += i * m_stride;
return *this;
}
iterator& operator++()
{
m_iter += m_stride;
return *this;
}
iterator operator++(int)
{
iterator tmp = *this;
m_iter += m_stride;
return tmp;
}
reference operator*() const
{
return *reinterpret_cast<pointer>(m_iter);
}
private:
byte_pointer m_iter;
std::size_t m_stride;
};
VertexPointer(pointer vertices, std::size_t stride)
: m_vertices(reinterpret_cast<byte_pointer>(vertices)), m_stride(stride) {}
iterator begin() const
{
return iterator(m_vertices, m_stride);
}
reference operator[](std::size_t i) const
{
return *reinterpret_cast<pointer>(m_vertices + m_stride*i);
}
private:
byte_pointer m_vertices;
std::size_t m_stride;
};
class IndexPointer
{
public:
typedef unsigned int index_type;
typedef const index_type* pointer;
class iterator
{
public:
iterator(pointer iter) : m_iter(iter) {}
bool operator==(const iterator& other) const
{
return m_iter == other.m_iter;
}
bool operator!=(const iterator& other) const
{
return !operator==(other);
}
iterator operator+(std::size_t i)
{
return m_iter + i;
}
iterator operator+=(std::size_t i)
{
return m_iter += i;
}
iterator operator++()
{
return ++m_iter;
}
iterator operator++(int)
{
return m_iter++;
}
const index_type& operator*() const
{
return *m_iter;
}
private:
void increment()
{
++m_iter;
}
pointer m_iter;
};
IndexPointer(pointer indices, std::size_t count)
: m_indices(indices), m_finish(indices + count) {}
iterator begin() const
{
return m_indices;
}
iterator end() const
{
return m_finish;
}
private:
pointer m_indices;
pointer m_finish;
};
template<typename Element> class BasicVector3;
typedef BasicVector3<float> Vector3;
class Matrix4;
class VolumeTest;
class SelectionTest
{
public:
virtual void BeginMesh(const Matrix4& localToWorld, bool twoSided = false) = 0;
virtual const VolumeTest& getVolume() const = 0;
virtual const Vector3& getNear() const = 0;
virtual const Vector3& getFar() const = 0;
virtual void TestPoint(const Vector3& point, SelectionIntersection& best) = 0;
virtual void TestPolygon(const VertexPointer& vertices, std::size_t count, SelectionIntersection& best) = 0;
virtual void TestLineLoop(const VertexPointer& vertices, std::size_t count, SelectionIntersection& best) = 0;
virtual void TestLineStrip(const VertexPointer& vertices, std::size_t count, SelectionIntersection& best) = 0;
virtual void TestLines(const VertexPointer& vertices, std::size_t count, SelectionIntersection& best) = 0;
virtual void TestTriangles(const VertexPointer& vertices, const IndexPointer& indices, SelectionIntersection& best) = 0;
virtual void TestQuads(const VertexPointer& vertices, const IndexPointer& indices, SelectionIntersection& best) = 0;
virtual void TestQuadStrip(const VertexPointer& vertices, const IndexPointer& indices, SelectionIntersection& best) = 0;
};
class Selectable;
class Selector
{
public:
virtual void pushSelectable(Selectable& selectable) = 0;
virtual void popSelectable() = 0;
virtual void addIntersection(const SelectionIntersection& intersection) = 0;
};
inline void Selector_add(Selector& selector, Selectable& selectable)
{
selector.pushSelectable(selectable);
selector.addIntersection(SelectionIntersection(0, 0));
selector.popSelectable();
}
inline void Selector_add(Selector& selector, Selectable& selectable, const SelectionIntersection& intersection)
{
selector.pushSelectable(selectable);
selector.addIntersection(intersection);
selector.popSelectable();
}
class VolumeTest;
class SelectionTestable
{
public:
STRING_CONSTANT(Name, "SelectionTestable");
virtual void testSelect(Selector& selector, SelectionTest& test) = 0;
};
inline SelectionTestable* Instance_getSelectionTestable(scene::Instance& instance)
{
return InstanceTypeCast<SelectionTestable>::cast(instance);
}
template<typename FirstArgument>
class Callback1;
class Plane3;
typedef Callback1<const Plane3&> PlaneCallback;
class SelectedPlanes
{
public:
virtual bool contains(const Plane3& plane) const = 0;
};
class PlaneSelectable
{
public:
STRING_CONSTANT(Name, "PlaneSelectable");
virtual void selectPlanes(Selector& selector, SelectionTest& test, const PlaneCallback& selectedPlaneCallback) = 0;
virtual void selectReversedPlanes(Selector& selector, const SelectedPlanes& selectedPlanes) = 0;
};
#endif
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