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khanat-opennel-code/code/nel/src/3d/ps_zone.cpp

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// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
// Copyright (C) 2010 Winch Gate Property Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#include "std3d.h"
#include "nel/3d/ps_zone.h"
#include "nel/3d/vertex_buffer.h"
#include "nel/3d/index_buffer.h"
#include "nel/3d/material.h"
#include "nel/3d/ps_util.h"
#include "nel/3d/dru.h"
#include "nel/3d/particle_system.h"
#include "nel/misc/plane.h"
// tmp
#include "nel/3d/particle_system_model.h"
#include <cmath>
#include <limits>
namespace NL3D {
/*
* Constructor
*/
CPSZone::CPSZone() : _BounceFactor(1.f), _CollisionBehaviour(bounce)
{
NL_PS_FUNC(CPSZone_CPSZone)
}
void CPSZone::serial(NLMISC::IStream &f) throw(NLMISC::EStream)
{
NL_PS_FUNC(CPSZone_serial)
f.serialVersion(1);
CPSTargetLocatedBindable::serial(f);
f.serialEnum(_CollisionBehaviour);
f.serial(_BounceFactor);
if (f.isReading())
{
for (TTargetCont::iterator it = _Targets.begin(); it != _Targets.end(); ++it)
{
// though this is not a force, this prevent parametric motion
(*it)->addNonIntegrableForceRef();
}
}
}
/** Add a new type of located for this zone to apply on.
* We override this to queery the target to allocate the CollisionInfo attribute
*/
void CPSZone::attachTarget(CPSLocated *ptr)
{
NL_PS_FUNC(CPSZone_attachTarget)
CPSTargetLocatedBindable::attachTarget(ptr);
ptr->queryCollisionInfo();
ptr->addNonIntegrableForceRef();
}
/// inherit from CPSTargetLocatedBindable. Its called when one of the targets has been detroyed
void CPSZone::releaseTargetRsc(CPSLocated *target)
{
NL_PS_FUNC(CPSZone_releaseTargetRsc)
// tell the target that we were using collision infos and that we won't use them anymore
target->releaseCollisionInfo();
target->releaseNonIntegrableForceRef();
}
void CPSZone::step(TPSProcessPass pass)
{
NL_PS_FUNC(CPSZone_step)
// for zone, the PSCollision pass and the PSToolRenderPass are processed
switch(pass)
{
case PSToolRender:
show();
break;
default: break;
}
}
// build a basis with K = the normal of the plane
CMatrix CPSZonePlane::buildBasis(uint32 index) const
{
NL_PS_FUNC(CPSZonePlane_buildBasis)
CMatrix m;
m.setPos(_Owner->getPos()[index]);
CPSUtil::buildSchmidtBasis(_Normal[index], m);
return m;
}
/// this compute a new speed vector, so that the located will reach the correct position at the next speed integration
/// this create the illusion of collision
/*void CPSZone::bounce(uint32 locatedIndex, const CVector &bouncePoint, const CVector &surfNormal, float elasticity, TAnimationTime ellapsedTime)
{
CVector &speed = _Owner->getSpeed()[locatedIndex];
const CVector &pos = _Owner->getPos()[locatedIndex];
CVector &bounceVect = elasticity * (speed - 2.0f * (speed * surfNormal) * surfNormal); // speed vector after collision
// now check where the located will be after integration
CVector d = bouncePoint - pos;
TAnimationTime collideDelay = speed.norm() / d.norm();
CVector finalPos = bouncePoint + (ellapsedTime - collideDelay) * bounceVect;
// now, we must have pos + ellapsedTime * newSpeed = finalPos
// newSpeed = alpha * (finalPos - pos)
// so alpha = 1 / ellapsedTime
speed = (1.0f / ellapsedTime) * (finalPos - pos);
}*/
void CPSZonePlane::show()
{
NL_PS_FUNC(CPSZonePlane_show)
const float planeSize = 2.0f;
setupDriverModelMatrix();
IDriver *driver = getDriver();
uint k = 0;
setupDriverModelMatrix();
CPSLocated *loc;
uint32 index;
CPSLocatedBindable *lb;
_Owner->getOwner()->getCurrentEditedElement(loc, index, lb);
for (TPSAttribVector::const_iterator it = _Owner->getPos().begin(); it != _Owner->getPos().end(); ++it, ++k)
{
const CRGBA col = ((lb == NULL || this == lb) && loc == _Owner && index == k ? CRGBA::Red : CRGBA(127, 127, 127));
CMatrix mat = buildBasis(k);
CPSUtil::displayBasis(getDriver(), getLocalToWorldMatrix(), mat, 1.f, *getFontGenerator(), *getFontManager());
setupDriverModelMatrix();
CDRU::drawLine(*it + (planeSize + 3) * mat.getI() + planeSize * mat.getJ(),
*it - (planeSize + 3) * mat.getI() + planeSize * mat.getJ(),
col,
*driver);
CDRU::drawLine(*it + (planeSize + 3) * mat.getI() - planeSize * mat.getJ(),
*it - (planeSize + 3) * mat.getI() - planeSize * mat.getJ(),
col,
*driver);
CDRU::drawLine(*it + planeSize * mat.getI() + (planeSize + 3) * mat.getJ(),
*it + planeSize * mat.getI() - (planeSize + 3) * mat.getJ(),
col,
*driver);
CDRU::drawLine(*it - planeSize * mat.getI() + (planeSize + 3) * mat.getJ(),
*it - planeSize * mat.getI() - (planeSize + 3) * mat.getJ(),
col,
*driver);
}
}
void CPSZonePlane::resize(uint32 size)
{
NL_PS_FUNC(CPSZonePlane_resize)
nlassert(size < (1 << 16));
_Normal.resize(size);
}
void CPSZonePlane::newElement(const CPSEmitterInfo &info)
{
NL_PS_FUNC(CPSZonePlane_newElement)
nlassert(_Normal.getSize() != _Normal.getMaxSize());
_Normal.insert(CVector(0, 0, 1));
}
void CPSZonePlane::deleteElement(uint32 index)
{
NL_PS_FUNC(CPSZonePlane_deleteElement)
_Normal.remove(index);
}
void CPSZonePlane::computeCollisions(CPSLocated &target, uint firstInstanceIndex, const NLMISC::CVector *posBefore, const NLMISC::CVector *posAfter)
{
NL_PS_FUNC(CPSZonePlane_computeCollisions)
MINI_TIMER(PSStatsZonePlane)
// for each target, we must check whether they are going through the plane
// if so they must bounce
TPSAttribVector::const_iterator planePosIt, planePosEnd, normalIt;
CPSCollisionInfo ci;
// cycle through the planes
planePosEnd = _Owner->getPos().end();
for (planePosIt = _Owner->getPos().begin(), normalIt = _Normal.begin(); planePosIt != planePosEnd; ++planePosIt, ++normalIt)
{
// we must setup the plane in the good basis
const CMatrix &m = CPSLocated::getConversionMatrix(&target, this->_Owner);
const float epsilon = 0.5f * PSCollideEpsilon;
NLMISC::CPlane p;
p.make(m.mulVector(*normalIt), m * (*planePosIt));
// deals with each particle
const NLMISC::CVector *itPosBefore = posBefore + firstInstanceIndex;
const NLMISC::CVector *itPosBeforeEnd = posBefore + target.getSize();
const NLMISC::CVector *itPosAfter = posAfter + firstInstanceIndex;
while (itPosBefore != itPosBeforeEnd)
{
float posSide = p * *itPosBefore;
float negSide = p * *itPosAfter;
if (posSide >= - epsilon && negSide <= epsilon)
{
float alpha;
if (fabsf(posSide - negSide) > std::numeric_limits<float>::min())
{
alpha = posSide / (posSide - negSide);
}
else
{
alpha = 0.f;
}
CVector startEnd = alpha * (*itPosAfter - *itPosBefore);
ci.Dist = startEnd.norm();
// we translate the particle from an epsilon so that it won't get hooked to the plane
ci.NewPos = *itPosBefore + startEnd + PSCollideEpsilon * p.getNormal();
const CVector &speed = target.getSpeed()[(uint32)(itPosBefore - posBefore)];
ci.NewSpeed = _BounceFactor * (speed - 2.0f * (speed * p.getNormal()) * p.getNormal());
ci.CollisionZone = this;
CPSLocated::_Collisions[itPosBefore - posBefore].update(ci);
}
++ itPosBefore;
++ itPosAfter;
}
}
}
void CPSZonePlane::setMatrix(uint32 index, const CMatrix &m)
{
NL_PS_FUNC(CPSZonePlane_setMatrix)
nlassert(index < _Normal.getSize());
_Normal[index] = m.getK();
_Owner->getPos()[index] = m.getPos();
}
CMatrix CPSZonePlane::getMatrix(uint32 index) const
{
NL_PS_FUNC(CPSZonePlane_getMatrix)
return buildBasis(index);
}
CVector CPSZonePlane::getNormal(uint32 index)
{
NL_PS_FUNC(CPSZonePlane_getNormal)
return _Normal[index];
}
void CPSZonePlane::setNormal(uint32 index, CVector n)
{
NL_PS_FUNC(CPSZonePlane_setNormal)
_Normal[index] = n;
}
void CPSZonePlane::serial(NLMISC::IStream &f) throw(NLMISC::EStream)
{
NL_PS_FUNC(CPSZonePlane_serial)
f.serialVersion(1);
CPSZone::serial(f);
f.serial(_Normal);
}
///////////////////////////
// sphere implementation //
///////////////////////////
void CPSZoneSphere::computeCollisions(CPSLocated &target, uint firstInstanceIndex, const NLMISC::CVector *posBefore, const NLMISC::CVector *posAfter)
{
NL_PS_FUNC(CPSZoneSphere_computeCollisions)
MINI_TIMER(PSStatsZoneSphere)
// for each target, we must check whether they are going through the plane
// if so they must bounce
TPSAttribRadiusPair::const_iterator radiusIt = _Radius.begin();
TPSAttribVector::const_iterator spherePosIt, spherePosEnd;
CPSCollisionInfo ci;
float rOut, rIn;
// cycle through the spheres
spherePosEnd = _Owner->getPos().end();
for (spherePosIt = _Owner->getPos().begin(), radiusIt = _Radius.begin(); spherePosIt != spherePosEnd; ++spherePosIt, ++radiusIt)
{
// we must setup the sphere in the good basis
const CMatrix &m = CPSLocated::getConversionMatrix(&target, this->_Owner);
CVector center = m * *spherePosIt;
// deals with each particle
const NLMISC::CVector *itPosBefore = posBefore + firstInstanceIndex;
const NLMISC::CVector *itPosBeforeEnd = posBefore + target.getSize();
const NLMISC::CVector *itPosAfter = posAfter + firstInstanceIndex;
while (itPosBefore != itPosBeforeEnd)
{
// check whether the located is going through the sphere
// we don't use raytracing for now because it is too slow ...
rOut = (*itPosBefore - center) * (*itPosBefore - center);
// initial position outside the sphere ?
if (rOut > radiusIt->R2)
{
rIn = (*itPosAfter - center) * (*itPosAfter - center);
const CVector &pos = *itPosBefore;
const CVector &dest = *itPosAfter;
const CVector D = dest - pos;
// final position inside the sphere ?
if ( rIn <= radiusIt->R2)
{
// discriminant of the intersection equation
const float b = 2.f * (pos * D - D * center), a = D * D
, c = (pos * pos) + (center * center) - 2.f * (pos * center) - radiusIt->R2;
float d = b * b - 4 * a * c;
if (d > 0.f)
{
d = sqrtf(d);
// roots of the equation, we take the smallest
const float r1 = .5f * (-b + 2.f * d) * a,
r2 = .5f * (-b - 2.f * d) * a;
const float r = std::min(r1, r2);
// collision point
const CVector C = pos + r * D;
const float alpha = ((C - pos) * D) * a;
const CVector startEnd = alpha * (dest - pos);
CVector normal = C - center;
normal = normal * (1.f / radiusIt->R);
ci.Dist = startEnd.norm();
// we translate the particle from an epsilon so that it won't get hooked to the sphere
ci.NewPos = pos + startEnd + PSCollideEpsilon * normal;
const CVector &speed = target.getSpeed()[(uint32)(itPosBefore - posBefore)];
ci.NewSpeed = _BounceFactor * (speed - 2.0f * (speed * normal) * normal);
ci.CollisionZone = this;
CPSLocated::_Collisions[itPosBefore - posBefore].update(ci);
}
}
}
++ itPosBefore;
++ itPosAfter;
}
}
}
void CPSZoneSphere::show()
{
NL_PS_FUNC(CPSZoneSphere_show)
CPSLocated *loc;
uint32 index;
CPSLocatedBindable *lb;
_Owner->getOwner()->getCurrentEditedElement(loc, index, lb);
TPSAttribRadiusPair::const_iterator radiusIt = _Radius.begin();
TPSAttribVector::const_iterator posIt = _Owner->getPos().begin(), endPosIt = _Owner->getPos().end();
setupDriverModelMatrix();
for (uint k = 0; posIt != endPosIt; ++posIt, ++radiusIt, ++k)
{
const CRGBA col = ((lb == NULL || this == lb) && loc == _Owner && index == k ? CRGBA::Red : CRGBA(127, 127, 127));
CPSUtil::displaySphere(*getDriver(), radiusIt->R, *posIt, 5, col);
}
}
void CPSZoneSphere::setMatrix(uint32 index, const CMatrix &m)
{
NL_PS_FUNC(CPSZoneSphere_setMatrix)
nlassert(index < _Radius.getSize());
// compute new pos
_Owner->getPos()[index] = m.getPos();
}
CMatrix CPSZoneSphere::getMatrix(uint32 index) const
{
NL_PS_FUNC(CPSZoneSphere_getMatrix)
nlassert(index < _Radius.getSize());
CMatrix m;
m.identity();
m.translate(_Owner->getPos()[index]);
return m;
}
void CPSZoneSphere::setScale(uint32 k, float scale)
{
NL_PS_FUNC(CPSZoneSphere_setScale)
_Radius[k].R = scale;
_Radius[k].R2 = scale * scale;
}
CVector CPSZoneSphere::getScale(uint32 k) const
{
NL_PS_FUNC(CPSZoneSphere_getScale)
return CVector(_Radius[k].R, _Radius[k].R, _Radius[k].R);
}
void CPSZoneSphere::serial(NLMISC::IStream &f) throw(NLMISC::EStream)
{
NL_PS_FUNC(CPSZoneSphere_serial)
f.serialVersion(1);
CPSZone::serial(f);
f.serial(_Radius);
}
void CPSZoneSphere::resize(uint32 size)
{
NL_PS_FUNC(CPSZoneSphere_resize)
nlassert(size < (1 << 16));
_Radius.resize(size);
}
void CPSZoneSphere::newElement(const CPSEmitterInfo &info)
{
NL_PS_FUNC(CPSZoneSphere_newElement)
CRadiusPair rp;
rp.R = rp.R2 = 1.f;
nlassert(_Radius.getSize() != _Radius.getMaxSize());
_Radius.insert(rp);
}
void CPSZoneSphere::deleteElement(uint32 index)
{
NL_PS_FUNC(CPSZoneSphere_deleteElement)
_Radius.remove(index);
}
////////////////////////////////
// CPSZoneDisc implementation //
////////////////////////////////
void CPSZoneDisc::computeCollisions(CPSLocated &target, uint firstInstanceIndex, const NLMISC::CVector *posBefore, const NLMISC::CVector *posAfter)
{
NL_PS_FUNC(CPSZoneDisc_computeCollisions)
MINI_TIMER(PSStatsZoneDisc)
// for each target, we must check whether they are going through the disc
// if so they must bounce
TPSAttribVector::const_iterator discPosIt, discPosEnd, normalIt;
TPSAttribRadiusPair::const_iterator radiusIt;
CPSCollisionInfo ci;
// the square of radius at the hit point
float hitRadius2;
// alpha is the ratio that gives the percent of endPos - startPos that hit the disc
CVector center;
// cycle through the disc
discPosEnd = _Owner->getPos().end();
for (discPosIt = _Owner->getPos().begin(), radiusIt = _Radius.begin(), normalIt = _Normal.begin(); discPosIt != discPosEnd; ++discPosIt, ++normalIt, ++radiusIt)
{
// we must setup the disc in the good basis
const CMatrix &m = CPSLocated::getConversionMatrix(&target, this->_Owner);
NLMISC::CPlane p;
center = m * (*discPosIt);
p.make(m.mulVector(*normalIt), center);
// deals with each particle
const float epsilon = 0.5f * PSCollideEpsilon;
// deals with each particle
const NLMISC::CVector *itPosBefore = posBefore + firstInstanceIndex;
const NLMISC::CVector *itPosBeforeEnd = posBefore + target.getSize();
const NLMISC::CVector *itPosAfter = posAfter + firstInstanceIndex;
while (itPosBefore != itPosBeforeEnd)
{
float posSide = p * *itPosBefore;
float negSide = p * *itPosAfter;
if (posSide >= - epsilon && negSide <= epsilon)
{
float alpha;
if (fabsf(posSide - negSide) > std::numeric_limits<float>::min())
{
alpha = posSide / (posSide - negSide);
}
else
{
alpha = 0.f;
}
CVector startEnd = alpha * (*itPosAfter - *itPosBefore);
ci.Dist = startEnd.norm();
// we translate the particle from an epsilon so that it won't get hooked to the disc
ci.NewPos = *itPosBefore + startEnd + PSCollideEpsilon * p.getNormal();
// now, check the collision pos against radius
hitRadius2 = (ci.NewPos - center) * (ci.NewPos - center);
if (hitRadius2 < radiusIt->R2) // check collision against disc
{
const CVector &speed = target.getSpeed()[(uint32)(itPosBefore - posBefore)];
ci.NewSpeed = _BounceFactor * (speed - 2.0f * (speed * p.getNormal()) * p.getNormal());
ci.CollisionZone = this;
CPSLocated::_Collisions[itPosBefore - posBefore].update(ci);
}
}
++ itPosBefore;
++ itPosAfter;
}
}
}
void CPSZoneDisc::show()
{
NL_PS_FUNC(CPSZoneDisc_show)
TPSAttribRadiusPair::const_iterator radiusIt = _Radius.begin();
TPSAttribVector::const_iterator posIt = _Owner->getPos().begin(), endPosIt = _Owner->getPos().end()
, normalIt = _Normal.begin();
setupDriverModelMatrix();
CMatrix mat;
CPSLocated *loc;
uint32 index;
CPSLocatedBindable *lb;
_Owner->getOwner()->getCurrentEditedElement(loc, index, lb);
for (uint k = 0; posIt != endPosIt; ++posIt, ++radiusIt, ++normalIt, ++k)
{
const CRGBA col = ((lb == NULL || this == lb) && loc == _Owner && index == k ? CRGBA::Red : CRGBA(127, 127, 127));
CPSUtil::buildSchmidtBasis(*normalIt, mat);
CPSUtil::displayDisc(*getDriver(), radiusIt->R, *posIt, mat, 32, col);
mat.setPos(*posIt);
CPSUtil::displayBasis(getDriver() ,getLocalToWorldMatrix(), mat, 1.f, *getFontGenerator(), *getFontManager());
setupDriverModelMatrix();
}
}
void CPSZoneDisc::setMatrix(uint32 index, const CMatrix &m)
{
NL_PS_FUNC(CPSZoneDisc_setMatrix)
nlassert(index < _Radius.getSize());
// compute new pos
_Owner->getPos()[index] = m.getPos();
// compute new normal
_Normal[index] = m.getK();
}
CMatrix CPSZoneDisc::getMatrix(uint32 index) const
{
NL_PS_FUNC(CPSZoneDisc_getMatrix)
CMatrix m, b;
m.translate(_Owner->getPos()[index]);
CPSUtil::buildSchmidtBasis(_Normal[index], b);
m = m * b;
return m;
}
CVector CPSZoneDisc::getNormal(uint32 index)
{
NL_PS_FUNC(CPSZoneDisc_getNormal)
return _Normal[index];
}
void CPSZoneDisc::setNormal(uint32 index, CVector n)
{
NL_PS_FUNC(CPSZoneDisc_setNormal)
_Normal[index] = n;
}
void CPSZoneDisc::setScale(uint32 k, float scale)
{
NL_PS_FUNC(CPSZoneDisc_setScale)
_Radius[k].R = scale;
_Radius[k].R2 = scale * scale;
}
CVector CPSZoneDisc::getScale(uint32 k) const
{
NL_PS_FUNC(CPSZoneDisc_getScale)
return CVector(_Radius[k].R, _Radius[k].R, _Radius[k].R);
}
void CPSZoneDisc::serial(NLMISC::IStream &f) throw(NLMISC::EStream)
{
NL_PS_FUNC(CPSZoneDisc_serial)
f.serialVersion(1);
CPSZone::serial(f);
f.serial(_Normal);
f.serial(_Radius);
}
void CPSZoneDisc::resize(uint32 size)
{
NL_PS_FUNC(CPSZoneDisc_resize)
nlassert(size < (1 << 16));
_Radius.resize(size);
_Normal.resize(size);
}
void CPSZoneDisc::newElement(const CPSEmitterInfo &info)
{
NL_PS_FUNC(CPSZoneDisc_newElement)
CRadiusPair rp;
rp.R = rp.R2 = 1.f;
nlassert(_Radius.getSize() != _Radius.getMaxSize());
_Radius.insert(rp);
_Normal.insert(CVector::K);
}
void CPSZoneDisc::deleteElement(uint32 index)
{
NL_PS_FUNC(CPSZoneDisc_deleteElement)
_Radius.remove(index);
_Normal.remove(index);
}
////////////////////////////////////
// CPSZoneCylinder implementation //
////////////////////////////////////
/*
void CPSZoneCylinder::performMotion(TAnimationTime ellapsedTime)
{
TPSAttribVector::const_iterator dimIt = _Dim.begin();
CPSAttrib<CPlaneBasis>::const_iterator basisIt = _Basis.begin();
TPSAttribVector::const_iterator cylinderPosIt, cylinderPosEnd, targetPosIt, targetPosEnd;
CVector dest;
CPSCollisionInfo ci;
CVector startEnd;
uint32 k;
const TPSAttribVector *speedAttr;
for (TTargetCont::iterator it = _Targets.begin(); it != _Targets.end(); ++it)
{
speedAttr = &((*it)->getSpeed());
// cycle through the cylinders
cylinderPosEnd = _Owner->getPos().end();
for (cylinderPosIt = _Owner->getPos().begin(); cylinderPosIt != cylinderPosEnd
; ++cylinderPosIt, ++dimIt, ++basisIt)
{
// we must setup the cylinder in the good basis
const CMatrix &m = CPSLocated::getConversionMatrix(*it, this->_Owner);
// compute the new center pos
CVector center = m * *cylinderPosIt;
// compute a basis for the cylinder
CVector I = m.mulVector(basisIt->X);
CVector J = m.mulVector(basisIt->Y);
CVector K = m.mulVector(basisIt->X ^ basisIt->Y);
// the pos projected (and scale) over the plane basis of the cylinder, the pos minus the center
CVector projectedPos, tPos;
// the same, but with the final position
CVector destProjectedPos, destTPos;
// deals with each particle
targetPosEnd = (*it)->getPos().end();
for (targetPosIt = (*it)->getPos().begin(), k = 0; targetPosIt != targetPosEnd; ++targetPosIt, ++k)
{
const CVector &speed = (*speedAttr)[k];
const CVector &pos = *targetPosIt;
// check whether current pos was outside the cylinder
tPos = pos - center;
projectedPos = (1 / dimIt->x) * (I * tPos) * I + (1 / dimIt->y) * (J * tPos) * J;
if (!
(
((tPos * K) < dimIt->z)
&& ((tPos * K) > -dimIt->z)
&& (projectedPos * projectedPos < 1.f)
)
)
{
dest = pos + ellapsedTime * speed;
destTPos = dest - center;
destProjectedPos = (1.f / dimIt->x) * (I * tPos) * I + (1.f / dimIt->y) * (J * tPos) * J;
// test whether the new position is inside the cylinder
if (!
(
((destTPos * K) < dimIt->z)
&& ((destTPos * K) > -dimIt->z)
&& (destProjectedPos * destProjectedPos < 1.f)
)
)
{
// now, detect the closest hit point (the smallest alpha, with alpha, the percent of the move vector
// to reach the hit point)
const float epsilon = 10E-6f;
float alphaTop, alphaBottom, alphaCyl;
const float denum = (dest - pos) * K;
// top plane
if (fabs(denum) < epsilon)
{
alphaTop = (dimIt->z - (tPos * K)) / denum;
if (alphaTop < 0.f) alphaTop = 1.f;
}
else
{
alphaTop = 1.f;
}
// bottom plane
if (fabs(denum) < epsilon)
{
alphaBottom = (- dimIt->z - (tPos * K)) / denum;
if (alphaBottom < 0.f) alphaBottom = 1.f;
}
else
{
alphaBottom = 1.f;
}
// cylinder
//expressed the src and dest positions in the cylinder basis
const float ox = tPos * I, oy = tPos * J, dx = (destTPos - tPos) * I, dy = (destTPos - tPos) * J;
// coefficients of the equation : a * alpha ^ 2 + b * alpha + c = 0
const float a = (dx * dx) / (dimIt->x * dimIt->x)
+ (dy * dy) / (dimIt->y * dimIt->y);
const float b = 2.f * (ox * dx) / (dimIt->x * dimIt->x)
+ (oy * dy) / (dimIt->y * dimIt->y);
const float c = ox * ox + oy * oy - 1;
// discriminant
const float delta = b * b - 4.f * a * c;
if (delta < epsilon)
{
alphaCyl = 1.f;
}
else
{
const float deltaRoot = sqrtf(delta);
const float r1 = (- b - deltaRoot) / (2.f / a);
const float r2 = (- b - deltaRoot) / (2.f / a);
if (r1 < 0.f) alphaCyl = r2;
else if (r2 < 0.f) alphaCyl = r1;
else alphaCyl = r1 < r2 ? r1 : r2;
}
// now, choose the minimum positive dist
if (alphaTop < alphaBottom && alphaTop < alphaCyl)
{
// collision with the top plane
CVector startEnd = alphaTop * (dest - pos);
ci.newPos = pos + startEnd + PSCollideEpsilon * K;
ci.dist = startEnd.norm();
ci.newSpeed = (-2.f * (speed * K)) * K + speed;
ci.collisionZone = this;
(*it)->collisionUpdate(ci, k);
}
else
if (alphaBottom < alphaCyl)
{
// collision with the bottom plane
CVector startEnd = alphaBottom * (dest - pos);
ci.newPos = pos + startEnd - PSCollideEpsilon * K;
ci.dist = startEnd.norm();
ci.newSpeed = (-2.f * (speed * K)) * K + speed;
ci.collisionZone = this;
(*it)->collisionUpdate(ci, k);
}
else
{
// collision with the cylinder
CVector startEnd = alphaCyl * (dest - pos);
// normal at the hit point. It is the gradient of the implicit equation x^2 / a^2 + y^2 / b^2 - R^ 2= 0
// so we got unormalized n = (2 x / a ^ 2, 2 y / b ^ 2, 0) in the basis of the cylinder
// As we'll normalize it, we don't need the 2 factor
float px = ox + alphaCyl * dx;
float py = oy + alphaCyl * dy;
CVector normal = px / (dimIt->x * dimIt->x) * I + py / (dimIt->y * dimIt->y) * J;
normal.normalize();
ci.newPos = pos + startEnd - PSCollideEpsilon * normal;
ci.dist = startEnd.norm();
ci.newSpeed = (-2.f * (speed * normal)) * normal + speed;
ci.collisionZone = this;
(*it)->collisionUpdate(ci, k);
}
}
}
}
}
}
}
*/
void CPSZoneCylinder::computeCollisions(CPSLocated &target, uint firstInstanceIndex, const NLMISC::CVector *posBefore, const NLMISC::CVector *posAfter)
{
NL_PS_FUNC(CPSZoneCylinder_computeCollisions)
MINI_TIMER(PSStatsZoneCylinder)
TPSAttribVector::const_iterator dimIt;
CPSAttrib<CPlaneBasis>::const_iterator basisIt;
TPSAttribVector::const_iterator cylinderPosIt, cylinderPosEnd;
CPSCollisionInfo ci;
// cycle through the cylinders
cylinderPosEnd = _Owner->getPos().end();
for (cylinderPosIt = _Owner->getPos().begin(), basisIt = _Basis.begin(), dimIt = _Dim.begin(); cylinderPosIt != cylinderPosEnd; ++cylinderPosIt, ++dimIt, ++basisIt)
{
// we must setup the cylinder in the good basis
const CMatrix &m = CPSLocated::getConversionMatrix(&target, this->_Owner);
// compute the new center pos
CVector center = m * *cylinderPosIt;
// compute a basis for the cylinder
CVector I = m.mulVector(basisIt->X);
CVector J = m.mulVector(basisIt->Y);
CVector K = m.mulVector(basisIt->X ^ basisIt->Y);
// the pos projected (and scale) over the plane basis of the cylinder, the pos minus the center
CVector projectedPos, tPos;
// the same, but with the final position
CVector destProjectedPos, destTPos;
// deals with each particle
// deals with each particle
const NLMISC::CVector *itPosBefore = posBefore + firstInstanceIndex;
const NLMISC::CVector *itPosBeforeEnd = posBefore + target.getSize();
const NLMISC::CVector *itPosAfter = posAfter + firstInstanceIndex;
while (itPosBefore != itPosBeforeEnd)
{
const CVector &pos = *itPosBefore;
// check whether current pos was outside the cylinder
tPos = pos - center;
projectedPos = (1 / dimIt->x) * (I * tPos) * I + (1 / dimIt->y) * (J * tPos) * J;
if (!
(
((tPos * K) < dimIt->z)
&& ((tPos * K) > -dimIt->z)
&& (projectedPos * projectedPos < 1.f)
)
)
{
const CVector &dest = *itPosAfter;
destTPos = dest - center;
destProjectedPos = (1.f / dimIt->x) * (I * destTPos) * I + (1.f / dimIt->y) * (J * destTPos) * J;
// test whether the new position is inside the cylinder
if (
((destTPos * K) < dimIt->z)
&& ((destTPos * K) > -dimIt->z)
&& (destProjectedPos * destProjectedPos < 1.f)
)
{
// now, detect the closest hit point (the smallest alpha, with alpha, the percent of the move vector
// to reach the hit point)
const float epsilon = 10E-3f;
float alphaTop, alphaBottom, alphaCyl;
const float denum = (dest - pos) * K;
// top plane
if (fabs(denum) < epsilon)
{
alphaTop = (dimIt->z - (tPos * K)) / denum;
if (alphaTop < 0.f) alphaTop = 1.f;
}
else
{
alphaTop = 1.f;
}
// bottom plane
if (fabs(denum) < epsilon)
{
alphaBottom = (- dimIt->z - (tPos * K)) / denum;
if (alphaBottom < 0.f) alphaBottom = 1.f;
}
else
{
alphaBottom = 1.f;
}
// cylinder
//expressed the src and dest positions in the cylinder basis
const float ox = tPos * I, oy = tPos * J, dx = (destTPos - tPos) * I, dy = (destTPos - tPos) * J;
// coefficients of the equation : a * alpha ^ 2 + b * alpha + c = 0
const float a = (dx * dx) / (dimIt->x * dimIt->x)
+ (dy * dy) / (dimIt->y * dimIt->y);
const float b = 2.f * ((ox * dx) / (dimIt->x * dimIt->x)
+ (oy * dy) / (dimIt->y * dimIt->y));
const float c = (ox * ox) / (dimIt->x * dimIt->x) + (oy * oy) / (dimIt->y * dimIt->y) - 1;
// discriminant
const float delta = b * b - 4.f * a * c;
if (delta < epsilon)
{
alphaCyl = 1.f;
}
else
{
const float deltaRoot = sqrtf(delta);
const float r1 = (- b + 2.f * deltaRoot) / (2.f * a);
const float r2 = (- b - 2.f * deltaRoot) / (2.f * a);
if (r1 < 0.f) alphaCyl = r2;
else if (r2 < 0.f) alphaCyl = r1;
else alphaCyl = r1 < r2 ? r1 : r2;
if (alphaCyl < 0.f) alphaCyl = 1.f;
}
const CVector &speed = target.getSpeed()[(uint32)(itPosBefore - posBefore)];
// now, choose the minimum positive dist
if (alphaTop < alphaBottom && alphaTop < alphaCyl)
{
// collision with the top plane
CVector startEnd = alphaTop * (dest - pos);
ci.NewPos = pos + startEnd + PSCollideEpsilon * K;
ci.Dist = startEnd.norm();
ci.NewSpeed = (-2.f * (speed * K)) * K + speed;
ci.CollisionZone = this;
CPSLocated::_Collisions[itPosBefore - posBefore].update(ci);
}
else
if (alphaBottom < alphaCyl)
{
// collision with the bottom plane
CVector startEnd = alphaBottom * (dest - pos);
ci.NewPos = pos + startEnd - PSCollideEpsilon * K;
ci.Dist = startEnd.norm();
ci.NewSpeed = (-2.f * (speed * K)) * K + speed;
ci.CollisionZone = this;
CPSLocated::_Collisions[itPosBefore - posBefore].update(ci);
}
else
{
// collision with the cylinder
CVector startEnd = alphaCyl * (dest - pos);
// normal at the hit point. It is the gradient of the implicit equation x^2 / a^2 + y^2 / b^2 - R^ 2= 0
// so we got unormalized n = (2 x / a ^ 2, 2 y / b ^ 2, 0) in the basis of the cylinder
// As we'll normalize it, we don't need the 2 factor
float px = ox + alphaCyl * dx;
float py = oy + alphaCyl * dy;
CVector normal = px / (dimIt->x * dimIt->x) * I + py / (dimIt->y * dimIt->y) * J;
normal.normalize();
ci.NewPos = pos + startEnd + PSCollideEpsilon * normal;
ci.Dist = startEnd.norm();
ci.NewSpeed = (-2.f * (speed * normal)) * normal + speed;
ci.CollisionZone = this;
CPSLocated::_Collisions[itPosBefore - posBefore].update(ci);
}
}
}
++ itPosBefore;
++ itPosAfter;
}
}
}
void CPSZoneCylinder::show()
{
NL_PS_FUNC(CPSZoneCylinder_show)
TPSAttribVector::const_iterator dimIt = _Dim.begin()
,posIt = _Owner->getPos().begin()
, endPosIt = _Owner->getPos().end();
CPSAttrib<CPlaneBasis>::const_iterator basisIt = _Basis.begin();
setupDriverModelMatrix();
CMatrix mat;
CPSLocated *loc;
uint32 index;
CPSLocatedBindable *lb;
_Owner->getOwner()->getCurrentEditedElement(loc, index, lb);
for (uint32 k = 0; posIt != endPosIt; ++posIt, ++dimIt, ++basisIt, ++k)
{
mat.setRot(basisIt->X, basisIt->Y, basisIt->X ^ basisIt->Y);
mat.setPos(CVector::Null);
const CRGBA col = ((lb == NULL || this == lb) && loc == _Owner && index == k ? CRGBA::Red : CRGBA(127, 127, 127));
CPSUtil::displayCylinder(*getDriver(), *posIt, mat, *dimIt, 32, col);
mat.setPos(*posIt);
CPSUtil::displayBasis(getDriver() ,getLocalToWorldMatrix(), mat, 1.f, *getFontGenerator(), *getFontManager());
setupDriverModelMatrix();
}
}
void CPSZoneCylinder::setMatrix(uint32 index, const CMatrix &m)
{
NL_PS_FUNC(CPSZoneCylinder_setMatrix)
// transform the basis
_Basis[index].X = m.getI();
_Basis[index].Y = m.getJ();
// compute new pos
_Owner->getPos()[index] = m.getPos();
}
CMatrix CPSZoneCylinder::getMatrix(uint32 index) const
{
NL_PS_FUNC(CPSZoneCylinder_getMatrix)
CMatrix m;
m.setRot(_Basis[index].X, _Basis[index].Y, _Basis[index].X ^_Basis[index].Y);
m.setPos(_Owner->getPos()[index]);
return m;
}
void CPSZoneCylinder::setScale(uint32 k, float scale)
{
NL_PS_FUNC(CPSZoneCylinder_setScale)
_Dim[k] = CVector(scale, scale, scale);
}
CVector CPSZoneCylinder::getScale(uint32 k) const
{
NL_PS_FUNC(CPSZoneCylinder_getScale)
return _Dim[k];
}
void CPSZoneCylinder::setScale(uint32 index, const CVector &s)
{
NL_PS_FUNC(CPSZoneCylinder_setScale)
_Dim[index] = s;
}
void CPSZoneCylinder::serial(NLMISC::IStream &f) throw(NLMISC::EStream)
{
NL_PS_FUNC(CPSZoneCylinder_serial)
f.serialVersion(1);
CPSZone::serial(f);
f.serial(_Basis);
f.serial(_Dim);
}
void CPSZoneCylinder::resize(uint32 size)
{
NL_PS_FUNC(CPSZoneCylinder_resize)
nlassert(size < (1 << 16));
_Basis.resize(size);
_Dim.resize(size);
}
void CPSZoneCylinder::newElement(const CPSEmitterInfo &info)
{
NL_PS_FUNC(CPSZoneCylinder_newElement)
_Basis.insert(CPlaneBasis(CVector::K));
_Dim.insert(CVector(1, 1, 1));
}
void CPSZoneCylinder::deleteElement(uint32 index)
{
NL_PS_FUNC(CPSZoneCylinder_deleteElement)
_Basis.remove(index);
_Dim.remove(index);
}
//////////////////////////////////////////////
// implementation of CPSZoneRectangle //
//////////////////////////////////////////////
void CPSZoneRectangle::computeCollisions(CPSLocated &target, uint firstInstanceIndex, const NLMISC::CVector *posBefore, const NLMISC::CVector *posAfter)
{
NL_PS_FUNC(CPSZoneRectangle_computeCollisions)
MINI_TIMER(PSStatsZoneRectangle)
// for each target, we must check whether they are going through the rectangle
// if so they must bounce
TPSAttribVector::const_iterator rectanglePosIt, rectanglePosEnd;
CPSAttrib<CPlaneBasis>::const_iterator basisIt;
TPSAttribFloat::const_iterator widthIt, heightIt;
CPSCollisionInfo ci;
// alpha is the ratio that gives the percent of endPos - startPos that hit the rectangle
basisIt = _Basis.begin();
heightIt = _Height.begin();
widthIt = _Width.begin();
rectanglePosEnd = _Owner->getPos().end();
for (rectanglePosIt = _Owner->getPos().begin(); rectanglePosIt != rectanglePosEnd; ++rectanglePosIt, ++basisIt, ++widthIt, ++heightIt)
{
// we must setup the rectangle in the good basis
const CMatrix &m = CPSLocated::getConversionMatrix(&target, this->_Owner);
NLMISC::CPlane p;
CVector center = m * (*rectanglePosIt);
const CVector X = m.mulVector(basisIt->X);
const CVector Y = m.mulVector(basisIt->Y);
p.make(X ^ Y, center);
// deals with each particle
const float epsilon = 0.5f * PSCollideEpsilon;
const NLMISC::CVector *itPosBefore = posBefore + firstInstanceIndex;
const NLMISC::CVector *itPosBeforeEnd = posBefore + target.getSize();
const NLMISC::CVector *itPosAfter = posAfter + firstInstanceIndex;
while (itPosBefore != itPosBeforeEnd)
{
float posSide = p * *itPosBefore;
float negSide = p * *itPosAfter;
if (posSide >= - epsilon && negSide <= epsilon)
{
float alpha;
if (fabsf(posSide - negSide) > std::numeric_limits<float>::min())
{
alpha = posSide / (posSide - negSide);
}
else
{
alpha = 0.f;
}
CVector startEnd = alpha * (*itPosAfter - *itPosBefore);
ci.Dist = startEnd.norm();
// we translate the particle from an epsilon so that it won't get hooked to the rectangle
ci.NewPos = *itPosBefore + startEnd;
// tmp
if ( fabs( (ci.NewPos - center) * X ) < *widthIt && fabs( (ci.NewPos - center) * Y ) < *heightIt) // check collision against rectangle
{
ci.NewPos += PSCollideEpsilon * p.getNormal();
const CVector &speed = target.getSpeed()[(uint32)(itPosBefore - posBefore)];
ci.NewSpeed = _BounceFactor * (speed - 2.0f * (speed * p.getNormal()) * p.getNormal());
ci.CollisionZone = this;
CPSLocated::_Collisions[itPosBefore - posBefore].update(ci);
}
}
++ itPosBefore;
++ itPosAfter;
}
}
}
void CPSZoneRectangle::show()
{
NL_PS_FUNC(CPSZoneRectangle_show)
nlassert(_Owner);
const uint size = _Owner->getSize();
if (!size) return;
setupDriverModelMatrix();
CMatrix mat;
CPSLocated *loc;
uint32 index;
CPSLocatedBindable *lb;
_Owner->getOwner()->getCurrentEditedElement(loc, index, lb);
for (uint k = 0; k < size; ++k)
{
const CVector &I = _Basis[k].X;
const CVector &J = _Basis[k].Y;
mat.setRot(I, J , I ^J);
mat.setPos(_Owner->getPos()[k]);
CPSUtil::displayBasis(getDriver(), getLocalToWorldMatrix(), mat, 1.f, *getFontGenerator(), *getFontManager());
setupDriverModelMatrix();
const CRGBA col = ((lb == NULL || this == lb) && loc == _Owner && index == k ? CRGBA::Red : CRGBA(127, 127, 127));
const CVector &pos = _Owner->getPos()[k];
CPSUtil::display3DQuad(*getDriver(), pos + I * _Width[k] + J * _Height[k]
, pos + I * _Width[k] - J * _Height[k]
, pos - I * _Width[k] - J * _Height[k]
, pos - I * _Width[k] + J * _Height[k], col);
}
}
void CPSZoneRectangle::setMatrix(uint32 index, const CMatrix &m)
{
NL_PS_FUNC(CPSZoneRectangle_setMatrix)
nlassert(_Owner);
_Owner->getPos()[index] = m.getPos();
_Basis[index].X = m.getI();
_Basis[index].Y = m.getJ();
}
CMatrix CPSZoneRectangle::getMatrix(uint32 index) const
{
NL_PS_FUNC(CPSZoneRectangle_getMatrix)
nlassert(_Owner);
CMatrix m;
m.setRot(_Basis[index].X, _Basis[index].Y, _Basis[index].X ^ _Basis[index].Y);
m.setPos(_Owner->getPos()[index]);
return m;
}
void CPSZoneRectangle::setScale(uint32 index, float scale)
{
NL_PS_FUNC(CPSZoneRectangle_setScale)
_Width[index] = scale;
_Height[index] = scale;
}
void CPSZoneRectangle::setScale(uint32 index, const CVector &s)
{
NL_PS_FUNC(CPSZoneRectangle_setScale)
_Width[index] = s.x;
_Height[index] = s.y;
}
CVector CPSZoneRectangle::getScale(uint32 index) const
{
NL_PS_FUNC(CPSZoneRectangle_getScale)
return CVector(_Width[index], _Height[index], 1.f);
}
void CPSZoneRectangle::serial(NLMISC::IStream &f) throw(NLMISC::EStream)
{
NL_PS_FUNC(CPSZoneRectangle_IStream )
f.serialVersion(1);
CPSZone::serial(f);
f.serial(_Basis);
f.serial(_Width);
f.serial(_Height);
}
void CPSZoneRectangle::resize(uint32 size)
{
NL_PS_FUNC(CPSZoneRectangle_resize)
nlassert(size < (1 << 16));
_Basis.resize(size);
_Width.resize(size);
_Height.resize(size);
}
void CPSZoneRectangle::newElement(const CPSEmitterInfo &info)
{
NL_PS_FUNC(CPSZoneRectangle_newElement)
_Basis.insert(CPlaneBasis(CVector::K));
_Width.insert(1.f);
_Height.insert(1.f);
}
void CPSZoneRectangle::deleteElement(uint32 index)
{
NL_PS_FUNC(CPSZoneRectangle_deleteElement)
_Basis.remove(index);
_Width.remove(index);
_Height.remove(index);
}
} // NL3D
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