FGFS-4.1/OpenSceneGraph
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Added fog parameters settings.

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This commit is contained in:
Robert Osfield
2006-04-14 11:04:11 +00:00
parent 4c0cfd18da
commit fd838f5787
4 changed files with 63 additions and 45 deletions
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3
examples/osgprecipitation/line_rain.vert
View File

@@ -3,7 +3,6 @@ uniform vec3 dv_j;
uniform vec3 dv_k;
uniform float inversePeriod;
uniform float startTime;
uniform vec4 particleColour;
uniform float particleSize;
@@ -18,8 +17,10 @@ void main(void)
{
vec3 pos = gl_Normal.xyz + (gl_Vertex.x*dv_i) + (dv_j * gl_Vertex.y);
float offset = gl_Vertex.z;
texCoord = gl_MultiTexCoord0.xy;
float startTime = gl_MultiTexCoord1.x;
vec3 v_previous = pos + dv_k * fract( (osg_FrameTime - startTime)*inversePeriod - offset);
vec3 v_current = v_previous + dv_k * (osg_DeltaFrameTime*inversePeriod);

101
examples/osgprecipitation/osgprecipitation.cpp
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@@ -39,8 +39,10 @@ struct PrecipatationParameters : public osg::Referenced
numberOfCellsZ(1),
nearTransition(25.0),
farTransition(100.0),
fogDensity(0.1),
fogEnd(1000.0)
fogDensity(0.001),
fogExponent(1.0),
fogEnd(1000.0),
fogColour(0.5, 0.5, 0.5, 1.0)
{}
void rain (float intensity)
@@ -48,9 +50,11 @@ struct PrecipatationParameters : public osg::Referenced
particleVelocity = osg::Vec3(0.0,0.0,-2.0) + osg::Vec3(0.0,0.0,-10.0)*intensity;
particleSize = 0.01 + 0.02*intensity;
numberOfParticles = intensity * 100000000;
particleColour = osg::Vec4(0.6, 0.6, 0.6, 1.0);
fogDensity = intensity;
particleColour = osg::Vec4(0.6, 0.6, 0.6, 1.0) - osg::Vec4(0.1, 0.1, 0.1, 1.0)* intensity;
fogExponent = 1.0f;
fogDensity = 0.01f*intensity;
fogEnd = 250/(0.01 + intensity);
farTransition = 150.0f - 100.0f*intensity;
}
void snow(float intensity)
@@ -58,9 +62,11 @@ struct PrecipatationParameters : public osg::Referenced
particleVelocity = osg::Vec3(0.0,0.0,-1.0) + osg::Vec3(0.0,0.0,-0.5)*intensity;
particleSize = 0.02 + 0.03*intensity;
numberOfParticles = intensity * 100000000;
particleColour = osg::Vec4(0.8, 0.8, 0.8, 1.0);
fogDensity = intensity;
fogEnd = 150/(0.01 + intensity);
particleColour = osg::Vec4(0.85f, 0.85f, 0.85f, 1.0f) - osg::Vec4(0.1f, 0.1f, 0.1f, 1.0f)* intensity;
fogExponent = 1.0f;
fogDensity = 0.02f*intensity;
fogEnd = 150.0f/(0.01f + intensity);
farTransition = 150.0f - 100.0f*intensity;
}
osg::BoundingBox boundingBox;
@@ -73,8 +79,10 @@ struct PrecipatationParameters : public osg::Referenced
unsigned int numberOfCellsZ;
float nearTransition;
float farTransition;
float fogExponent;
float fogDensity;
float fogEnd;
osg::Vec4 fogColour;
};
struct PrecipitationCullCallback : public virtual osg::Drawable::CullCallback
@@ -88,34 +96,6 @@ struct PrecipitationCullCallback : public virtual osg::Drawable::CullCallback
/** 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;
}
};
@@ -143,8 +123,11 @@ public:
void setPosition(const osg::Vec3& position) { _position = position; }
const osg::Vec3& getPosition() const { return _position; }
void setStartTime(float time) { _startTime = time; }
float getStartTime() const { return _startTime; }
virtual void compileGLObjects(osg::State& state) const
{
if (!_internalGeometry) return;
@@ -161,7 +144,10 @@ public:
{
if (!_internalGeometry) return;
const Extensions* extensions = getExtensions(state.getContextID(),true);
glNormal3fv(_position.ptr());
extensions->glMultiTexCoord1f(GL_TEXTURE1, _startTime);
_internalGeometry->draw(state);
@@ -214,6 +200,7 @@ public:
protected:
osg::Vec3 _position;
float _startTime;
osg::ref_ptr<osg::Geometry> _internalGeometry;
};
@@ -507,6 +494,8 @@ osg::Node* createRainEffect(const osg::BoundingBox& bb, const osg::Vec3& velocit
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 startTime = random(0, period);
// high res LOD.
{
@@ -518,6 +507,7 @@ osg::Node* createRainEffect(const osg::BoundingBox& bb, const osg::Vec3& velocit
geometry->setName("highres");
geometry->setPosition(position);
geometry->setStartTime(startTime);
geometry->setInitialBound(bb);
geometry->setInternalGeometry(quad_geometry.get());
geometry->setStateSet(quad_stateset.get());
@@ -536,6 +526,7 @@ osg::Node* createRainEffect(const osg::BoundingBox& bb, const osg::Vec3& velocit
geometry->setName("lowres");
geometry->setPosition(position);
geometry->setStartTime(startTime);
geometry->setInitialBound(bb);
geometry->setInternalGeometry(point_geometry.get());
geometry->setStateSet(point_stateset.get());
@@ -605,14 +596,14 @@ osg::Node* createCellRainEffect(const PrecipatationParameters& parameters)
osg::Uniform* dv_k_Uniform = new osg::Uniform("dv_k",dv_k);
osg::Uniform* inversePeriodUniform = new osg::Uniform("inversePeriod",1.0f/period);
osg::Uniform* startTime = new osg::Uniform("startTime",0.0f);
//osg::Uniform* startTime = new osg::Uniform("startTime",0.0f);
//stateset->addUniform(position_Uniform); // vec3
stateset->addUniform(dv_i_Uniform); // vec3 could be float
stateset->addUniform(dv_j_Uniform); // vec3 could be float
stateset->addUniform(dv_k_Uniform); // vec3
stateset->addUniform(inversePeriodUniform); // float
stateset->addUniform(startTime); // float
//stateset->addUniform(startTime); // float
stateset->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
stateset->setMode(GL_BLEND, osg::StateAttribute::ON);
@@ -656,11 +647,24 @@ osg::Node* createModel(osg::Node* loadedModel, PrecipatationParameters& paramete
osg::StateSet* stateset = loadedModel->getOrCreateStateSet();
osg::Fog* fog = new osg::Fog;
fog->setMode(osg::Fog::LINEAR);
if (parameters.fogExponent<1.0)
{
fog->setMode(osg::Fog::LINEAR);
}
else if (parameters.fogExponent<2.0)
{
fog->setMode(osg::Fog::EXP);
}
else
{
fog->setMode(osg::Fog::EXP2);
}
fog->setDensity(parameters.fogDensity);
fog->setStart(0.0f);
fog->setEnd(parameters.fogEnd);
fog->setColor(osg::Vec4(0.5f,0.5f,0.5f,1.0f));
fog->setColor(parameters.fogColour);
stateset->setAttributeAndModes(fog, osg::StateAttribute::ON);
osg::LightSource* lightSource = new osg::LightSource;
@@ -692,8 +696,16 @@ int main( int argc, char **argv )
arguments.getApplicationUsage()->setDescription(arguments.getApplicationName()+" example provides an interactive viewer for visualising point clouds..");
arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName()+" [options] filename ...");
arguments.getApplicationUsage()->addCommandLineOption("-h or --help","Display this information");
arguments.getApplicationUsage()->addCommandLineOption("--shader","Use GLSL shaders.");
arguments.getApplicationUsage()->addCommandLineOption("--fixed","Use fixed function pipeline.");
arguments.getApplicationUsage()->addCommandLineOption("","");
arguments.getApplicationUsage()->addCommandLineOption("","");
arguments.getApplicationUsage()->addCommandLineOption("","");
arguments.getApplicationUsage()->addCommandLineOption("","");
arguments.getApplicationUsage()->addCommandLineOption("","");
arguments.getApplicationUsage()->addCommandLineOption("","");
arguments.getApplicationUsage()->addCommandLineOption("","");
arguments.getApplicationUsage()->addCommandLineOption("","");
arguments.getApplicationUsage()->addCommandLineOption("","");
arguments.getApplicationUsage()->addCommandLineOption("","");
// construct the viewer.
@@ -712,6 +724,8 @@ int main( int argc, char **argv )
while (arguments.read("--rain", intensity)) parameters.rain(intensity);
while (arguments.read("--particleSize", parameters.particleSize)) {}
while (arguments.read("--particleColor", parameters.particleColour.r(), parameters.particleColour.g(), parameters.particleColour.b(), parameters.particleColour.a())) {}
while (arguments.read("--particleColour", parameters.particleColour.r(), parameters.particleColour.g(), parameters.particleColour.b(), parameters.particleColour.a())) {}
osg::Vec3 particleVelocity;
while (arguments.read("--particleVelocity", particleVelocity.x(), particleVelocity.y(), particleVelocity.z() )) parameters.particleVelocity = particleVelocity;
@@ -733,7 +747,10 @@ int main( int argc, char **argv )
parameters.boundingBox.zMax())) {}
while (arguments.read("--fogDensity", parameters.fogDensity )) {}
while (arguments.read("--fogExponent", parameters.fogExponent )) {}
while (arguments.read("--fogEnd", parameters.fogEnd )) {}
while (arguments.read("--fogColor", parameters.fogColour.r(), parameters.fogColour.g(), parameters.fogColour.b(), parameters.fogColour.a())) {}
while (arguments.read("--fogColour", parameters.fogColour.r(), parameters.fogColour.g(), parameters.fogColour.b(), parameters.fogColour.a())) {}
// if user request help write it out to cout.
if (arguments.read("-h") || arguments.read("--help"))

2
examples/osgprecipitation/point_rain.vert
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@@ -3,7 +3,6 @@ uniform vec3 dv_j;
uniform vec3 dv_k;
uniform float inversePeriod;
uniform float startTime;
uniform vec4 particleColour;
uniform float particleSize;
@@ -17,6 +16,7 @@ void main(void)
vec3 pos = gl_Normal.xyz + (gl_Vertex.x*dv_i) + (dv_j * gl_Vertex.y);
texCoord = gl_MultiTexCoord0.xy;
float startTime = gl_MultiTexCoord1.x;
vec3 v_current = pos + dv_k * fract( (osg_FrameTime - startTime)*inversePeriod - gl_Vertex.z);

2
examples/osgprecipitation/quad_rain.vert
View File

@@ -3,7 +3,6 @@ uniform vec3 dv_j;
uniform vec3 dv_k;
uniform float inversePeriod;
uniform float startTime;
uniform vec4 particleColour;
uniform float particleSize;
@@ -20,6 +19,7 @@ void main(void)
float offset = gl_Vertex.z;
texCoord = gl_MultiTexCoord0.xy;
float startTime = gl_MultiTexCoord1.x;
vec3 v_previous = pos + dv_k * fract( (osg_FrameTime - startTime)*inversePeriod - offset);
vec3 v_current = v_previous + dv_k * (osg_DeltaFrameTime*inversePeriod);