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Added support for rapid movement of the emitter, with particle now seeding between

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the position of the emitter in the previous frame and the new position in the new
frame, the number of particles added also scales up to compensate for this movement.
This commit is contained in:
Robert Osfield
2005-08-25 14:12:08 +00:00
parent 320d0f67e4
commit be285c62c0
14 changed files with 183 additions and 28 deletions
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39
include/osgParticle/ParticleProcessor
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@@ -119,6 +119,13 @@ namespace osgParticle
/// Get the current world-to-local transformation matrix (valid only during cull traversal).
inline const osg::Matrix& getWorldToLocalMatrix();
/// Get the previous local-to-world transformation matrix (valid only during cull traversal).
inline const osg::Matrix& getPreviousLocalToWorldMatrix();
/// Get the previous world-to-local transformation matrix (valid only during cull traversal).
inline const osg::Matrix& getPreviousWorldToLocalMatrix();
/// Transform a point from local to world coordinates (valid only during cull traversal).
inline osg::Vec3 transformLocalToWorld(const osg::Vec3& P);
@@ -144,10 +151,14 @@ namespace osgParticle
bool _enabled;
double _t0;
osg::ref_ptr<ParticleSystem> _ps;
bool _first_ltw_compute;
bool _need_ltw_matrix;
bool _first_wtl_compute;
bool _need_wtl_matrix;
osg::Matrix _ltw_matrix;
osg::Matrix _wtl_matrix;
osg::Matrix _previous_ltw_matrix;
osg::Matrix _previous_wtl_matrix;
osg::NodeVisitor* _current_nodevisitor;
bool _endless;
@@ -252,9 +263,13 @@ namespace osgParticle
inline const osg::Matrix& ParticleProcessor::getLocalToWorldMatrix()
{
if (_need_ltw_matrix) {
_ltw_matrix = osg::Matrix::identity();
//_current_nodevisitor->getLocalToWorldMatrix(_ltw_matrix, this);
_previous_ltw_matrix = _ltw_matrix;
_ltw_matrix = osg::computeLocalToWorld(_current_nodevisitor->getNodePath());
if (_first_ltw_compute)
{
_previous_ltw_matrix = _ltw_matrix;
_first_ltw_compute = false;
}
_need_ltw_matrix = false;
}
return _ltw_matrix;
@@ -263,14 +278,30 @@ namespace osgParticle
inline const osg::Matrix& ParticleProcessor::getWorldToLocalMatrix()
{
if (_need_wtl_matrix) {
_wtl_matrix = osg::Matrix::identity();
//_current_nodevisitor->getWorldToLocalMatrix(_wtl_matrix, this);
_previous_wtl_matrix = _wtl_matrix;
_wtl_matrix = osg::computeWorldToLocal(_current_nodevisitor->getNodePath());
if (_first_wtl_compute)
{
_previous_wtl_matrix = _wtl_matrix;
_first_wtl_compute = false;
}
_need_wtl_matrix = false;
}
return _wtl_matrix;
}
inline const osg::Matrix& ParticleProcessor::getPreviousLocalToWorldMatrix()
{
if (_need_ltw_matrix) getLocalToWorldMatrix();
return _previous_ltw_matrix;
}
inline const osg::Matrix& ParticleProcessor::getPreviousWorldToLocalMatrix()
{
if (_need_wtl_matrix) getWorldToLocalMatrix();
return _previous_wtl_matrix;
}
inline osg::Vec3 ParticleProcessor::transformLocalToWorld(const osg::Vec3& P)
{
return getLocalToWorldMatrix().preMult(P);