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Added command line options and various speed improvements.

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This commit is contained in:
Robert Osfield
2006-04-13 19:05:26 +00:00
parent 7747971b6a
commit 264ae12770
3 changed files with 183 additions and 31 deletions
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202
examples/osgprecipitation/osgprecipitation.cpp
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@@ -27,6 +27,92 @@
float random(float min,float max) { return min + (max-min)*(float)rand()/(float)RAND_MAX; }
struct PrecipatationParameters : public osg::Referenced
{
PrecipatationParameters():
particleVelocity(0.0,0.0,-5.0),
particleSize(0.02),
particleColour(0.6, 0.6, 0.6, 1.0),
numberOfParticles(10000000),
numberOfCellsX(100),
numberOfCellsY(100),
numberOfCellsZ(1),
nearTransition(25.0),
farTransition(100.0)
{}
void rain (float intensity)
{
particleVelocity = osg::Vec3(0.0,0.0,-2.0) + osg::Vec3(0.0,0.0,-10.0)*intensity;
particleSize = 0.01 + 0.04*intensity;
numberOfParticles = intensity * 100000000;
particleColour = osg::Vec4(0.6, 0.6, 0.6, 1.0);
}
void snow(float intensity)
{
particleVelocity = osg::Vec3(0.0,0.0,-1.0) + osg::Vec3(0.0,0.0,-0.5)*intensity;
particleSize = 0.02 + 0.05*intensity;
numberOfParticles = intensity * 100000000;
particleColour = osg::Vec4(0.8, 0.8, 0.8, 1.0);
}
osg::BoundingBox boundingBox;
osg::Vec3 particleVelocity;
float particleSize;
osg::Vec4 particleColour;
unsigned int numberOfParticles;
unsigned int numberOfCellsX;
unsigned int numberOfCellsY;
unsigned int numberOfCellsZ;
float nearTransition;
float farTransition;
};
struct PrecipitationCullCallback : public virtual osg::Drawable::CullCallback
{
PrecipitationCullCallback() {}
PrecipitationCullCallback(const PrecipitationCullCallback&,const osg::CopyOp&) {}
META_Object(osg,PrecipitationCullCallback);
/** do customized cull code, return true if drawable should be culled.*/
virtual bool cull(osg::NodeVisitor* nodeVisitor, osg::Drawable* drawable, osg::State* state) const
{
osgUtil::CullVisitor* cv = dynamic_cast<osgUtil::CullVisitor*>(nodeVisitor);
if (cv)
{
float distance = nodeVisitor->getDistanceFromEyePoint(drawable->getBound().center(),true);
// if (distance<-4.0) return true;
#if 0
const osg::BoundingBox& bb = drawable->getBound();
const osg::Polytope& frustum = cv->getCurrentCullingSet().getFrustum();
int numPointsInside = 0;
for(unsigned int i=0; i<8; ++i)
{
if (frustum.contains(bb.corner(i))) ++numPointsInside;
}
std::cout<<" "<<drawable->getName()<<" distance "<<distance<<"num Points inside = "<<numPointsInside<<std::endl;
if (cv->isCulled(drawable->getBound()))
{
std::cout<<" isCulled "<<drawable->getName()<<std::endl;
return true;
}
#endif
}
return false;
}
};
class PrecipitationGeometry : public osg::Geometry
{
public:
@@ -34,6 +120,8 @@ public:
PrecipitationGeometry()
{
setSupportsDisplayList(false);
setCullCallback(new PrecipitationCullCallback());
}
virtual bool supports(const osg::PrimitiveFunctor&) const { return false; }
@@ -68,6 +156,46 @@ public:
glNormal3fv(_position.ptr());
_internalGeometry->draw(state);
static int s_frameNumber = 0xffffffff;
static unsigned int s_NumberQuads = 0;
static unsigned int s_NumberQuadsVertices = 0;
static unsigned int s_NumberLines = 0;
static unsigned int s_NumberLinesVertices = 0;
static unsigned int s_NumberPoints = 0;
static unsigned int s_NumberPointsVertices = 0;
if (s_frameNumber != state.getFrameStamp()->getFrameNumber())
{
// std::cout<<"Frame "<< s_frameNumber<<"\tquads "<<s_NumberQuads<<", "<<s_NumberQuadsVertices<<" points "<<s_NumberPoints<<", "<<s_NumberPointsVertices<<std::endl;
s_NumberQuads = 0;
s_NumberLines = 0;
s_NumberPoints = 0;
s_NumberQuadsVertices = 0;
s_NumberLinesVertices = 0;
s_NumberPointsVertices = 0;
s_frameNumber = state.getFrameStamp()->getFrameNumber();
}
if (_internalGeometry->getName()=="quad")
{
s_NumberQuads++;
s_NumberQuadsVertices+= _internalGeometry->getVertexArray()->getNumElements();
}
else if (_internalGeometry->getName()=="line")
{
s_NumberLines++;
s_NumberLinesVertices+= _internalGeometry->getVertexArray()->getNumElements();
}
else if (_internalGeometry->getName()=="point")
{
s_NumberPoints++;
s_NumberPointsVertices+= _internalGeometry->getVertexArray()->getNumElements();
}
}
virtual osg::BoundingBox computeBound() const
@@ -212,6 +340,8 @@ void createGeometry(unsigned int numParticles,
osg::Vec2Array* quad_offsets = 0;
if (quad_geometry)
{
quad_geometry->setName("quad");
quad_vertices = new osg::Vec3Array(numParticles*4);
quad_offsets = new osg::Vec2Array(numParticles*4);
@@ -225,6 +355,8 @@ void createGeometry(unsigned int numParticles,
osg::Vec2Array* line_offsets = 0;
if (line_geometry)
{
line_geometry->setName("line");
line_vertices = new osg::Vec3Array(numParticles*2);
line_offsets = new osg::Vec2Array(numParticles*2);
@@ -238,6 +370,8 @@ void createGeometry(unsigned int numParticles,
osg::Vec2Array* point_offsets = 0;
if (point_geometry)
{
point_geometry->setName("point");
point_vertices = new osg::Vec3Array(numParticles);
point_offsets = new osg::Vec2Array(numParticles);
@@ -352,21 +486,19 @@ void setUpGeometries(unsigned int numParticles)
}
osg::Node* createRainEffect(const osg::BoundingBox& bb, const osg::Vec3& velocity)
osg::Node* createRainEffect(const osg::BoundingBox& bb, const osg::Vec3& velocity, float nearTransition, float farTransition)
{
osg::LOD* lod = new osg::LOD;
// time taken to get from start to the end of cycle
float period = fabs((bb.zMax()-bb.zMin()) / velocity.z());
// distance between start point and end of cyclce
osg::Vec3 position(bb.xMin(), bb.yMin(), bb.zMax());
// time taken to get from start to the end of cycle
float period = fabs((bb.zMax()-bb.zMin()) / velocity.z());
osg::Vec3 dv_i( bb.xMax()-bb.xMin(), 0.0f, 0.0f );
osg::Vec3 dv_j( 0.0f, bb.yMax()-bb.yMin(), 0.0f );
osg::Vec3 dv_k( velocity * period );
float nearDistance = 25.0;
float farDistance = 100.0;
// high res LOD.
{
@@ -376,45 +508,50 @@ osg::Node* createRainEffect(const osg::BoundingBox& bb, const osg::Vec3& velocit
highres_geode->addDrawable(geometry);
geometry->setName("highres");
geometry->setPosition(position);
geometry->setInitialBound(bb);
geometry->setInternalGeometry(quad_geometry.get());
geometry->setStateSet(quad_stateset.get());
lod->addChild( highres_geode, 0.0f, nearDistance );
lod->addChild( highres_geode, 0.0f, nearTransition );
}
// low res LOD
{
osg::Geode* lowres_geode = new osg::Geode;
PrecipitationGeometry* geometry = new PrecipitationGeometry;
lowres_geode->addDrawable(geometry);
geometry->setName("lowres");
geometry->setPosition(position);
geometry->setInitialBound(bb);
geometry->setInternalGeometry(point_geometry.get());
geometry->setStateSet(point_stateset.get());
lod->addChild( lowres_geode, nearDistance, farDistance );
lod->addChild( lowres_geode, nearTransition, farTransition );
}
return lod;
}
osg::Node* createCellRainEffect(const osg::BoundingBox& bb, const osg::Vec3& velocity, unsigned int numParticles)
osg::Node* createCellRainEffect(const PrecipatationParameters& parameters)
{
unsigned int numX = 100;
unsigned int numY = 100;
unsigned int numX = parameters.numberOfCellsX;
unsigned int numY = parameters.numberOfCellsY;
unsigned int numCells = numX*numY;
unsigned int numParticlesPerCell = numParticles/numCells;
unsigned int numParticlesPerCell = parameters.numberOfParticles/numCells;
setUpGeometries(numParticlesPerCell);
std::cout<<"Effect total number of particles = "<<numParticles<<std::endl;
const osg::BoundingBox& bb = parameters.boundingBox;
std::cout<<"Effect total number of particles = "<<parameters.numberOfParticles<<std::endl;
std::cout<<"Number of cells = "<<numCells<<std::endl;
std::cout<<"Number of particles per cell = "<<numParticlesPerCell<<std::endl;
std::cout<<"Cell width = "<<(bb.xMax()-bb.xMin())/(float)(numX)<<std::endl;
@@ -433,7 +570,7 @@ osg::Node* createCellRainEffect(const osg::BoundingBox& bb, const osg::Vec3& vel
bb.yMin() + ((bb.yMax()-bb.yMin())*(float)(j+1))/(float)(numY),
bb.zMax());
group->addChild(createRainEffect(bbLocal, velocity));
group->addChild(createRainEffect(bbLocal, parameters.particleVelocity, parameters.nearTransition, parameters.farTransition));
}
}
@@ -443,16 +580,15 @@ osg::Node* createCellRainEffect(const osg::BoundingBox& bb, const osg::Vec3& vel
sgv.divide();
#endif
#if 1
osg::StateSet* stateset = group->getOrCreateStateSet();
// time taken to get from start to the end of cycle
float period = fabs((bb.zMax()-bb.zMin()) / velocity.z());
float period = fabs((bb.zMax()-bb.zMin()) / parameters.particleVelocity.z());
// distance between start point and end of cyclce
osg::Vec3 dv_i( (bb.xMax()-bb.xMin())/(float)(numX), 0.0f, 0.0f );
osg::Vec3 dv_j( 0.0f, (bb.yMax()-bb.yMin())/(float)(numY), 0.0f );
osg::Vec3 dv_k( velocity * period );
osg::Vec3 dv_k( parameters.particleVelocity * period );
// set up uniforms
// osg::Uniform* position_Uniform = new osg::Uniform("position",position);
@@ -479,19 +615,19 @@ osg::Node* createCellRainEffect(const osg::BoundingBox& bb, const osg::Vec3& vel
osg::Texture2D* texture = new osg::Texture2D(createSpotLightImage(osg::Vec4(1.0f,1.0f,1.0f,1.0f),osg::Vec4(1.0f,1.0f,1.0f,0.0f),32,1.0));
stateset->setTextureAttribute(0, texture);
stateset->addUniform(new osg::Uniform("particleColour", osg::Vec4(0.6,0.6,0.6,1.0)));
stateset->addUniform(new osg::Uniform("particleSize", 0.02f));
stateset->addUniform(new osg::Uniform("particleColour", parameters.particleColour));
stateset->addUniform(new osg::Uniform("particleSize", parameters.particleSize));
osg::Uniform* previousModelViewUniform = new osg::Uniform("previousModelViewMatrix",osg::Matrix());
stateset->addUniform(previousModelViewUniform);
group->setCullCallback(new CullCallback(previousModelViewUniform));
#endif
return group;
}
osg::Node* createModel(osg::Node* loadedModel, bool /*useShaders*/)
osg::Node* createModel(osg::Node* loadedModel, PrecipatationParameters& parameters)
{
osg::Group* group = new osg::Group;
@@ -507,6 +643,8 @@ osg::Node* createModel(osg::Node* loadedModel, bool /*useShaders*/)
bb.set( -500, -500, 0, +500, +500, 10);
parameters.boundingBox = bb;
osg::StateSet* stateset = loadedModel->getOrCreateStateSet();
osg::Fog* fog = new osg::Fog;
@@ -530,7 +668,7 @@ osg::Node* createModel(osg::Node* loadedModel, bool /*useShaders*/)
}
group->addChild(createCellRainEffect(bb, velocity, numParticles));
group->addChild(createCellRainEffect(parameters));
return group;
}
@@ -559,9 +697,21 @@ int main( int argc, char **argv )
// get details on keyboard and mouse bindings used by the viewer.
viewer.getUsage(*arguments.getApplicationUsage());
bool shader = true;
while (arguments.read("--shader")) shader = true;
while (arguments.read("--fixed")) shader = false;
PrecipatationParameters parameters;
float intensity;
while (arguments.read("--snow", intensity)) parameters.snow(intensity);
while (arguments.read("--rain", intensity)) parameters.rain(intensity);
float particleSize;
while (arguments.read("--particleSize", particleSize)) parameters.particleSize = particleSize;
osg::Vec3 particleVelocity;
while (arguments.read("--particleVelocity", particleVelocity.x(), particleVelocity.y(), particleVelocity.z() )) parameters.particleVelocity = particleVelocity;
float transition;
while (arguments.read("--nearTransition", transition )) parameters.nearTransition = transition;
while (arguments.read("--farTransition", transition )) parameters.farTransition = transition;
// if user request help write it out to cout.
if (arguments.read("-h") || arguments.read("--help"))
@@ -586,7 +736,7 @@ int main( int argc, char **argv )
// read the scene from the list of file specified commandline args.
osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFiles(arguments);
loadedModel = createModel(loadedModel.get(), shader);
loadedModel = createModel(loadedModel.get(), parameters);
// if no model has been successfully loaded report failure.
if (!loadedModel)

8
examples/osgprecipitation/point_rain.vert
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@@ -24,8 +24,10 @@ void main(void)
gl_Position = gl_ModelViewProjectionMatrix * vec4(v_current,1.0);
float pointSize = min(abs(1280*particleSize / gl_Position.w), 20.0);
gl_PointSize = max(ceil(pointSize),2);
//float pointSize = min(abs(1280*particleSize / gl_Position.w), 20.0);
float pointSize = abs(1280*particleSize / gl_Position.w);
//gl_PointSize = max(ceil(pointSize),2);
gl_PointSize = ceil(pointSize);
colour.a = 0.05+(pointSize)/(gl_PointSize);
colour.a = 0.05+(pointSize*pointSize)/(gl_PointSize*gl_PointSize);
}

4
examples/osgprecipitation/quad_rain.vert
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@@ -35,8 +35,8 @@ void main(void)
dv.xy += dv_normalized * particleSize;
vec2 dp = vec2( -dv_normalized.y, dv_normalized.x ) * particleSize;
float area = length(dv.xy)*length(dp);
colour.a = 0.05+(particleSize*particleSize)/area;
float area = length(dv.xy);
colour.a = 0.05+(particleSize)/area;
v1.xyz += dv*texCoord.y;