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73 lines
2.0 KiB
C++
73 lines
2.0 KiB
C++
#ifndef OPENMW_COMPONENTS_DETOURNAVIGATOR_TILEBOUNDS_H
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#define OPENMW_COMPONENTS_DETOURNAVIGATOR_TILEBOUNDS_H
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#include <components/misc/convert.hpp>
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#include <osg/Vec2f>
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#include <osg/Vec2i>
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#include <BulletCollision/CollisionShapes/btCollisionShape.h>
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#include <LinearMath/btTransform.h>
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#include <algorithm>
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#include <optional>
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#include <tuple>
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namespace DetourNavigator
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{
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struct TileBounds
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{
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osg::Vec2f mMin;
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osg::Vec2f mMax;
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};
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inline auto tie(const TileBounds& value) noexcept
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{
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return std::tie(value.mMin, value.mMax);
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}
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inline bool operator<(const TileBounds& lhs, const TileBounds& rhs) noexcept
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{
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return tie(lhs) < tie(rhs);
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}
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inline bool operator==(const TileBounds& lhs, const TileBounds& rhs) noexcept
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{
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return tie(lhs) == tie(rhs);
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}
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inline bool operator!=(const TileBounds& lhs, const TileBounds& rhs) noexcept
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{
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return !(lhs == rhs);
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}
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inline std::optional<TileBounds> getIntersection(const TileBounds& a, const TileBounds& b) noexcept
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{
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const float minX = std::max(a.mMin.x(), b.mMin.x());
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const float maxX = std::min(a.mMax.x(), b.mMax.x());
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if (minX > maxX)
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return std::nullopt;
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const float minY = std::max(a.mMin.y(), b.mMin.y());
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const float maxY = std::min(a.mMax.y(), b.mMax.y());
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if (minY > maxY)
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return std::nullopt;
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return TileBounds{ osg::Vec2f(minX, minY), osg::Vec2f(maxX, maxY) };
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}
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inline TileBounds maxCellTileBounds(const osg::Vec2i& position, int size)
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{
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return TileBounds{ osg::Vec2f(position.x(), position.y()) * size,
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osg::Vec2f(position.x() + 1, position.y() + 1) * size };
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}
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inline TileBounds makeObjectTileBounds(const btCollisionShape& shape, const btTransform& transform)
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{
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btVector3 aabbMin;
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btVector3 aabbMax;
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shape.getAabb(transform, aabbMin, aabbMax);
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return TileBounds{ Misc::Convert::toOsgXY(aabbMin), Misc::Convert::toOsgXY(aabbMax) };
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}
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}
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#endif
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