204 lines
6.8 KiB
C++
204 lines
6.8 KiB
C++
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// Copyright (C) 2002-2007 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 "CParticleAnimatedMeshSceneNodeEmitter.h"
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#include "IAnimatedMeshSceneNode.h"
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#include "IMesh.h"
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#include "os.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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CParticleAnimatedMeshSceneNodeEmitter::CParticleAnimatedMeshSceneNodeEmitter(
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IAnimatedMeshSceneNode* node, bool useNormalDirection,
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const core::vector3df& direction, f32 normalDirectionModifier,
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s32 mbNumber, bool everyMeshVertex,
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u32 minParticlesPerSecond, u32 maxParticlesPerSecond,
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const video::SColor& minStartColor, const video::SColor& maxStartColor,
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u32 lifeTimeMin, u32 lifeTimeMax, s32 maxAngleDegrees )
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: Node(node), TotalVertices(0), MBCount(0), MBNumber(mbNumber),
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EveryMeshVertex(everyMeshVertex), UseNormalDirection(useNormalDirection),
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NormalDirectionModifier(normalDirectionModifier), Direction(direction),
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MinParticlesPerSecond(minParticlesPerSecond), MaxParticlesPerSecond(maxParticlesPerSecond),
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MinStartColor(minStartColor), MaxStartColor(maxStartColor),
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MinLifeTime(lifeTimeMin), MaxLifeTime(lifeTimeMax),
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Time(0), Emitted(0), MaxAngleDegrees(maxAngleDegrees)
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{
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AnimatedMesh = node->getMesh();
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BaseMesh = AnimatedMesh->getMesh(0);
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TotalVertices = 0;
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MBCount = BaseMesh->getMeshBufferCount();
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for( u32 i = 0; i < MBCount; ++i )
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{
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VertexPerMeshBufferList.push_back( BaseMesh->getMeshBuffer(i)->getVertexCount() );
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TotalVertices += BaseMesh->getMeshBuffer(i)->getVertexCount();
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}
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}
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//! Prepares an array with new particles to emitt into the system
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//! and returns how much new particles there are.
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s32 CParticleAnimatedMeshSceneNodeEmitter::emitt(u32 now, u32 timeSinceLastCall, SParticle*& outArray)
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{
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Time += timeSinceLastCall;
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u32 pps = (MaxParticlesPerSecond - MinParticlesPerSecond);
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f32 perSecond = pps ? (f32)MinParticlesPerSecond + (os::Randomizer::rand() % pps) : MinParticlesPerSecond;
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f32 everyWhatMillisecond = 1000.0f / perSecond;
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if(Time > everyWhatMillisecond)
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{
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Particles.set_used(0);
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u32 amount = (u32)((Time / everyWhatMillisecond) + 0.5f);
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Time = 0;
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SParticle p;
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if(amount > MaxParticlesPerSecond * 2)
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amount = MaxParticlesPerSecond * 2;
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// Get Mesh for this frame
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IMesh* frameMesh = AnimatedMesh->getMesh( Node->getFrameNr(), 255, Node->getStartFrame(), Node->getEndFrame() );
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for(u32 i=0; i<amount; ++i)
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{
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if( EveryMeshVertex )
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{
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for( u32 j=0; j<frameMesh->getMeshBufferCount(); ++j )
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{
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for( u32 k=0; k<frameMesh->getMeshBuffer(j)->getVertexCount(); ++k )
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{
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switch( frameMesh->getMeshBuffer(j)->getVertexType() )
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{
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case video::EVT_STANDARD:
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p.pos = ((video::S3DVertex*)frameMesh->getMeshBuffer(j)->getVertices())[k].Pos;
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if( UseNormalDirection )
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p.vector = ((video::S3DVertex*)frameMesh->getMeshBuffer(j)->getVertices())[k].Normal / NormalDirectionModifier;
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else
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p.vector = Direction;
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break;
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case video::EVT_TANGENTS:
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p.pos = ((video::S3DVertexTangents*)frameMesh->getMeshBuffer(j)->getVertices())[k].Pos;
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if( UseNormalDirection )
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p.vector = ((video::S3DVertexTangents*)frameMesh->getMeshBuffer(j)->getVertices())[k].Normal / NormalDirectionModifier;
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else
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p.vector = Direction;
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break;
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}
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p.startTime = now;
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if( MaxAngleDegrees )
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{
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core::vector3df tgt = p.vector;
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tgt.rotateXYBy((os::Randomizer::rand()%(MaxAngleDegrees*2)) - MaxAngleDegrees, core::vector3df());
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tgt.rotateYZBy((os::Randomizer::rand()%(MaxAngleDegrees*2)) - MaxAngleDegrees, core::vector3df());
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tgt.rotateXZBy((os::Randomizer::rand()%(MaxAngleDegrees*2)) - MaxAngleDegrees, core::vector3df());
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p.vector = tgt;
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}
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if(MaxLifeTime - MinLifeTime == 0)
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p.endTime = now + MinLifeTime;
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else
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p.endTime = now + MinLifeTime + (os::Randomizer::rand() % (MaxLifeTime - MinLifeTime));
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p.color = MinStartColor.getInterpolated(
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MaxStartColor, (os::Randomizer::rand() % 100) / 100.0f);
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p.startColor = p.color;
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p.startVector = p.vector;
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Particles.push_back(p);
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}
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}
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}
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else
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{
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s32 randomMB = 0;
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if( MBNumber < 0 )
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{
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randomMB = os::Randomizer::rand() % MBCount;
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}
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else
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{
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randomMB = MBNumber;
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}
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u32 vertexNumber = os::Randomizer::rand() % frameMesh->getMeshBuffer(randomMB)->getVertexCount();
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switch( frameMesh->getMeshBuffer(randomMB)->getVertexType() )
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{
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case video::EVT_STANDARD:
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p.pos = ((video::S3DVertex*)frameMesh->getMeshBuffer(randomMB)->getVertices())[vertexNumber].Pos;
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if( UseNormalDirection )
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p.vector = ((video::S3DVertex*)frameMesh->getMeshBuffer(randomMB)->getVertices())[vertexNumber].Normal / NormalDirectionModifier;
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else
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p.vector = Direction;
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break;
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case video::EVT_TANGENTS:
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p.pos = ((video::S3DVertexTangents*)frameMesh->getMeshBuffer(randomMB)->getVertices())[vertexNumber].Pos;
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if( UseNormalDirection )
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p.vector = ((video::S3DVertexTangents*)frameMesh->getMeshBuffer(randomMB)->getVertices())[vertexNumber].Normal / NormalDirectionModifier;
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else
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p.vector = Direction;
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break;
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}
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p.startTime = now;
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if( MaxAngleDegrees )
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{
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core::vector3df tgt = Direction;
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tgt.rotateXYBy((os::Randomizer::rand()%(MaxAngleDegrees*2)) - MaxAngleDegrees, core::vector3df(0,0,0));
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tgt.rotateYZBy((os::Randomizer::rand()%(MaxAngleDegrees*2)) - MaxAngleDegrees, core::vector3df(0,0,0));
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tgt.rotateXZBy((os::Randomizer::rand()%(MaxAngleDegrees*2)) - MaxAngleDegrees, core::vector3df(0,0,0));
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p.vector = tgt;
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}
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if(MaxLifeTime - MinLifeTime == 0)
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p.endTime = now + MinLifeTime;
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else
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p.endTime = now + MinLifeTime + (os::Randomizer::rand() % (MaxLifeTime - MinLifeTime));
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p.color = MinStartColor.getInterpolated(
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MaxStartColor, (os::Randomizer::rand() % 100) / 100.0f);
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p.startColor = p.color;
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p.startVector = p.vector;
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Particles.push_back(p);
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}
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}
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outArray = Particles.pointer();
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return Particles.size();
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}
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return 0;
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}
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//! Set Mesh to emit particles from
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void CParticleAnimatedMeshSceneNodeEmitter::setAnimatedMeshSceneNode( IAnimatedMeshSceneNode* node )
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{
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Node = node;
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AnimatedMesh = node->getMesh();
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BaseMesh = AnimatedMesh->getMesh(0);
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TotalVertices = 0;
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MBCount = BaseMesh->getMeshBufferCount();
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for( u32 i = 0; i < MBCount; ++i )
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{
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VertexPerMeshBufferList.push_back( BaseMesh->getMeshBuffer(i)->getVertexCount() );
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TotalVertices += BaseMesh->getMeshBuffer(i)->getVertexCount();
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}
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}
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} // end namespace scene
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} // end namespace irr
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