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58 lines
2.2 KiB
C++
58 lines
2.2 KiB
C++
#include "oscillatingrecastmeshobject.hpp"
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#include "tilebounds.hpp"
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#include <components/bullethelpers/aabb.hpp>
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#include <algorithm>
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namespace DetourNavigator
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{
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namespace
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{
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void limitBy(btAABB& aabb, const TileBounds& bounds)
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{
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aabb.m_min.setX(std::max(aabb.m_min.x(), static_cast<btScalar>(bounds.mMin.x())));
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aabb.m_min.setY(std::max(aabb.m_min.y(), static_cast<btScalar>(bounds.mMin.y())));
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aabb.m_max.setX(std::min(aabb.m_max.x(), static_cast<btScalar>(bounds.mMax.x())));
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aabb.m_max.setY(std::min(aabb.m_max.y(), static_cast<btScalar>(bounds.mMax.y())));
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}
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}
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OscillatingRecastMeshObject::OscillatingRecastMeshObject(RecastMeshObject&& impl, std::size_t lastChangeRevision)
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: mImpl(std::move(impl))
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, mLastChangeRevision(lastChangeRevision)
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, mAabb(BulletHelpers::getAabb(mImpl.getShape(), mImpl.getTransform()))
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{
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}
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OscillatingRecastMeshObject::OscillatingRecastMeshObject(const RecastMeshObject& impl, std::size_t lastChangeRevision)
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: mImpl(impl)
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, mLastChangeRevision(lastChangeRevision)
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, mAabb(BulletHelpers::getAabb(mImpl.getShape(), mImpl.getTransform()))
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{
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}
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bool OscillatingRecastMeshObject::update(const btTransform& transform, const AreaType areaType,
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std::size_t lastChangeRevision, const TileBounds& bounds)
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{
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const btTransform oldTransform = mImpl.getTransform();
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if (!mImpl.update(transform, areaType))
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return false;
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if (transform == oldTransform)
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return true;
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if (mLastChangeRevision != lastChangeRevision)
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{
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mLastChangeRevision = lastChangeRevision;
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// btAABB doesn't have copy-assignment operator
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const btAABB aabb = BulletHelpers::getAabb(mImpl.getShape(), transform);
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mAabb.m_min = aabb.m_min;
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mAabb.m_max = aabb.m_max;
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return true;
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}
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const btAABB currentAabb = mAabb;
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mAabb.merge(BulletHelpers::getAabb(mImpl.getShape(), transform));
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limitBy(mAabb, bounds);
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return currentAabb != mAabb;
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}
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}
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