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https://github.com/minetest/irrlicht.git
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git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@6000 dfc29bdd-3216-0410-991c-e03cc46cb475
226 lines
5.9 KiB
C++
226 lines
5.9 KiB
C++
// Copyright (C) 2002-2012 Nikolaus Gebhardt
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// This file is part of the "Irrlicht Engine".
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// For conditions of distribution and use, see copyright notice in irrlicht.h
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#include "CMetaTriangleSelector.h"
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namespace irr
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{
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namespace scene
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{
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//! constructor
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CMetaTriangleSelector::CMetaTriangleSelector()
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{
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#ifdef _DEBUG
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setDebugName("CMetaTriangleSelector");
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#endif
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}
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//! destructor
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CMetaTriangleSelector::~CMetaTriangleSelector()
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{
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removeAllTriangleSelectors();
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}
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//! Returns amount of all available triangles in this selector
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s32 CMetaTriangleSelector::getTriangleCount() const
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{
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s32 count = 0;
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for (u32 i=0; i<TriangleSelectors.size(); ++i)
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count += TriangleSelectors[i]->getTriangleCount();
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return count;
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}
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//! Gets all triangles.
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void CMetaTriangleSelector::getTriangles(core::triangle3df* triangles, s32 arraySize,
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s32& outTriangleCount, const core::matrix4* transform, bool useNodeTransform,
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irr::core::array<SCollisionTriangleRange>* outTriangleInfo) const
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{
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s32 outWritten = 0;
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irr::u32 outTriangleInfoSize = outTriangleInfo ? outTriangleInfo->size() : 0;
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for (u32 i=0; i<TriangleSelectors.size(); ++i)
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{
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s32 t = 0;
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TriangleSelectors[i]->getTriangles(triangles + outWritten,
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arraySize - outWritten, t, transform, useNodeTransform, outTriangleInfo);
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if ( outTriangleInfo )
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{
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irr::u32 newTriangleInfoSize = outTriangleInfo->size();
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for ( u32 ti=outTriangleInfoSize; ti<newTriangleInfoSize; ++ti )
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{
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(*outTriangleInfo)[ti].RangeStart += outWritten;
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}
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outTriangleInfoSize = newTriangleInfoSize;
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}
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outWritten += t;
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if (outWritten==arraySize)
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break;
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}
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outTriangleCount = outWritten;
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}
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//! Gets all triangles which lie within a specific bounding box.
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void CMetaTriangleSelector::getTriangles(core::triangle3df* triangles, s32 arraySize,
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s32& outTriangleCount, const core::aabbox3d<f32>& box,
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const core::matrix4* transform, bool useNodeTransform,
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irr::core::array<SCollisionTriangleRange>* outTriangleInfo) const
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{
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s32 outWritten = 0;
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irr::u32 outTriangleInfoSize = outTriangleInfo ? outTriangleInfo->size() : 0;
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for (u32 i=0; i<TriangleSelectors.size(); ++i)
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{
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s32 t = 0;
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TriangleSelectors[i]->getTriangles(triangles + outWritten,
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arraySize - outWritten, t, box, transform, useNodeTransform, outTriangleInfo);
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if ( outTriangleInfo )
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{
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irr::u32 newTriangleInfoSize = outTriangleInfo->size();
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for ( u32 ti=outTriangleInfoSize; ti<newTriangleInfoSize; ++ti )
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{
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(*outTriangleInfo)[ti].RangeStart += outWritten;
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}
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outTriangleInfoSize = newTriangleInfoSize;
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}
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outWritten += t;
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if (outWritten==arraySize)
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break;
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}
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outTriangleCount = outWritten;
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}
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//! Gets all triangles which have or may have contact with a 3d line.
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void CMetaTriangleSelector::getTriangles(core::triangle3df* triangles, s32 arraySize,
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s32& outTriangleCount, const core::line3d<f32>& line,
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const core::matrix4* transform, bool useNodeTransform,
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irr::core::array<SCollisionTriangleRange>* outTriangleInfo) const
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{
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s32 outWritten = 0;
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irr::u32 outTriangleInfoSize = outTriangleInfo ? outTriangleInfo->size() : 0;
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for (u32 i=0; i<TriangleSelectors.size(); ++i)
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{
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s32 t = 0;
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TriangleSelectors[i]->getTriangles(triangles + outWritten,
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arraySize - outWritten, t, line, transform, useNodeTransform, outTriangleInfo);
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if ( outTriangleInfo )
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{
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irr::u32 newTriangleInfoSize = outTriangleInfo->size();
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for ( u32 ti=outTriangleInfoSize; ti<newTriangleInfoSize; ++ti )
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{
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(*outTriangleInfo)[ti].RangeStart += outWritten;
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}
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outTriangleInfoSize = newTriangleInfoSize;
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}
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outWritten += t;
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if (outWritten==arraySize)
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break;
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}
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outTriangleCount = outWritten;
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}
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//! Adds a triangle selector to the collection of triangle selectors
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//! in this metaTriangleSelector.
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void CMetaTriangleSelector::addTriangleSelector(ITriangleSelector* toAdd)
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{
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if (!toAdd)
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return;
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TriangleSelectors.push_back(toAdd);
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toAdd->grab();
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}
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//! Removes a specific triangle selector which was added before from the collection.
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bool CMetaTriangleSelector::removeTriangleSelector(ITriangleSelector* toRemove)
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{
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for (u32 i=0; i<TriangleSelectors.size(); ++i)
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{
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if (toRemove == TriangleSelectors[i])
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{
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TriangleSelectors[i]->drop();
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TriangleSelectors.erase(i);
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return true;
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}
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}
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return false;
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}
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//! Removes all triangle selectors from the collection.
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void CMetaTriangleSelector::removeAllTriangleSelectors()
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{
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for (u32 i=0; i<TriangleSelectors.size(); ++i)
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TriangleSelectors[i]->drop();
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TriangleSelectors.clear();
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}
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//! Return the scene node associated with a given triangle.
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ISceneNode* CMetaTriangleSelector::getSceneNodeForTriangle(u32 triangleIndex) const
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{
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u32 totalTriangles = 0;
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for (u32 i=0; i<TriangleSelectors.size(); ++i)
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{
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totalTriangles += TriangleSelectors[i]->getTriangleCount();
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if(totalTriangles > triangleIndex)
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return TriangleSelectors[i]->getSceneNodeForTriangle(0);
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}
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return 0;
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}
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/* Return the number of TriangleSelectors that are inside this one,
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Only useful for MetaTriangleSelector others return 1
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*/
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u32 CMetaTriangleSelector::getSelectorCount() const
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{
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return TriangleSelectors.size();
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}
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/* Returns the TriangleSelector based on index based on getSelectorCount
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Only useful for MetaTriangleSelector others return 'this'
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*/
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ITriangleSelector* CMetaTriangleSelector::getSelector(u32 index)
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{
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if (index >= TriangleSelectors.size())
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return 0;
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return TriangleSelectors[index];
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}
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/* Returns the TriangleSelector based on index based on getSelectorCount
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Only useful for MetaTriangleSelector others return 'this'
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*/
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const ITriangleSelector* CMetaTriangleSelector::getSelector(u32 index) const
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{
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if (index >= TriangleSelectors.size())
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return 0;
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return TriangleSelectors[index];
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}
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} // end namespace scene
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} // end namespace irr
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