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First work on Cloud OSG (not displayed for moment)

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git-svn-id: https://svn.code.sf.net/p/speed-dreams/code/trunk@5412 30fe4595-0a0c-4342-8851-515496e4dcbd

Former-commit-id: 9f02fb5e955a7da472f3aa4ee47cd7d1448d8881
Former-commit-id: 4960ebb6211ea400eea8903c7325b34918070d57
This commit is contained in:
torcs-ng 2013-04-19 22:22:21 +00:00
parent d26934056a
commit 8716a1505c
4 changed files with 926 additions and 3 deletions
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7
src/modules/graphic/osggraph/CMakeLists.txt
View file

@ -2,15 +2,16 @@ INCLUDE(../../../../cmake/macros.cmake)
SET(OSGGRAPH_HEADERS OsgVectorArrayAdapter.h OsgColor.h OsgAtomic.h
OsgReferenced.h OsgSharedPtr.h OsgSphere.h OsgSun.h
OsgMoon.h OsgStars.h OsgDome.h #OsgCloud.h
OsgSky.h
OsgMoon.h OsgStars.h OsgDome.h #OsgStateAttributeFactory.h
OsgCloud.h OsgSky.h
AccGeode.h AccException.h ReaderWriterACC.h
OsgLoader.h OsgScenery.h OsgRender.h OsgMath.h OsgMain.h
OsgView.h OsgGraph.h OsgCar.h OsgWheel.h OsgBrake.h
OsgScreens.h OsgCamera.h)
SET(OSGGRAPH_SOURCES OsgSphere.cpp OsgSun.cpp OsgMoon.cpp OsgStars.cpp
OsgDome.cpp #OsgCloud.cpp
OsgDome.cpp #OsgStateAttributeFactory.cpp
OsgCloud.cpp
OsgSky.cpp
AccGeode.cpp AccException.cpp
ReaderWriterACC.cpp OsgLoader.cpp OsgBackground.cpp

750
src/modules/graphic/osggraph/OsgCloud.cpp Normal file
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@ -0,0 +1,750 @@
/***************************************************************************
file : OsgCloud.cpp
created : Wen Mar 27 00:00:41 CEST 2013
copyright : (C) 2013 by Xavier Bertaux
email : bertauxx@yahoo.fr
version : $Id: OsgCloud.cpp 4693 2013-03-27 03:12:09Z torcs-ng $
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include <sstream>
#include <math.h>
#include <osg/AlphaFunc>
#include <osg/BlendFunc>
#include <osg/CullFace>
#include <osg/Geode>
#include <osg/Geometry>
#include <osg/Material>
#include <osg/ShadeModel>
#include <osg/TexEnv>
#include <osg/TexEnvCombine>
#include <osg/Texture2D>
#include <osg/TextureCubeMap>
#include <osg/TexMat>
#include <osg/Fog>
#include <osgDB/ReadFile>
#include <tgf.h>
#include "OsgMath.h"
//#include "OsgNewcloud.h"
//#include "OsgCloudfield.h"
//#include "OsgStateAttributeFactory.h"
#include "OsgCloud.h"
using namespace osg;
static osg::ref_ptr<osg::StateSet> layer_states[SDCloudLayer::SD_MAX_CLOUD_COVERAGES];
static osg::ref_ptr<osg::StateSet> layer_states2[SDCloudLayer::SD_MAX_CLOUD_COVERAGES];
static osg::ref_ptr<osg::TextureCubeMap> cubeMap;
static bool state_initialized = false;
/*const std::string SGCloudLayer::SG_CLOUD_OVERCAST_STRING = "overcast";
const std::string SGCloudLayer::SG_CLOUD_BROKEN_STRING = "broken";
const std::string SGCloudLayer::SG_CLOUD_SCATTERED_STRING = "scattered";
const std::string SGCloudLayer::SG_CLOUD_FEW_STRING = "few";
const std::string SGCloudLayer::SG_CLOUD_CIRRUS_STRING = "cirrus";
const std::string SGCloudLayer::SG_CLOUD_CLEAR_STRING = "clear";*/
// make an StateSet for a cloud layer given the named texture
static osg::StateSet*
SDMakeState(const std::string &path, const char* colorTexture, const char* normalTexture)
{
osg::StateSet *stateSet = new osg::StateSet;
std::string TmpPath;
TmpPath = path+colorTexture;
osg::ref_ptr<osg::Image> image = osgDB::readImageFile(TmpPath);
osg::ref_ptr<osg::Texture2D> texture = new osg::Texture2D(image.get());
stateSet->setTextureAttributeAndModes(0, texture);
stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::ON);
osg::ref_ptr<osg::ShadeModel> Smooth = new osg::ShadeModel;
Smooth->setMode(ShadeModel::SMOOTH);
Smooth->setDataVariance(Object::STATIC);
stateSet->setAttributeAndModes(Smooth);
stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
osg::ref_ptr<osg::AlphaFunc> StandardAlphaFunc = new AlphaFunc;
StandardAlphaFunc->setFunction(osg::AlphaFunc::GREATER);
StandardAlphaFunc->setReferenceValue(0.01);
StandardAlphaFunc->setDataVariance(Object::STATIC);
stateSet->setAttributeAndModes(StandardAlphaFunc);
osg::ref_ptr<BlendFunc> StandardBlendFunc = new BlendFunc;
StandardBlendFunc->setSource(BlendFunc::SRC_ALPHA);
StandardBlendFunc->setDestination(BlendFunc::ONE_MINUS_SRC_ALPHA);
StandardBlendFunc->setDataVariance(Object::STATIC);
stateSet->setAttributeAndModes(StandardBlendFunc);
osg::Material* material = new osg::Material;
material->setColorMode(osg::Material::AMBIENT_AND_DIFFUSE);
material->setEmission(osg::Material::FRONT_AND_BACK,
osg::Vec4(0.05, 0.05, 0.05, 0));
material->setSpecular(osg::Material::FRONT_AND_BACK,
osg::Vec4(0, 0, 0, 1));
stateSet->setAttribute(material);
stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
stateSet->setMode(GL_LIGHT0, osg::StateAttribute::OFF);
//If the normal texture is given prepare a bumpmapping enabled state
if (normalTexture)
{
TmpPath = path+normalTexture;
osg::ref_ptr<osg::Image> image = osgDB::readImageFile(TmpPath);
osg::ref_ptr<osg::Texture2D> texture = new osg::Texture2D(image.get());
stateSet->setTextureAttributeAndModes(2, texture);
stateSet->setTextureMode(2, GL_TEXTURE_2D, osg::StateAttribute::ON);
}
return stateSet;
}
// Constructor
SDCloudLayer::SDCloudLayer( const string &tex_path ) :
cloud_root(new osg::Switch),
layer_root(new osg::Switch),
group_top(new osg::Group),
group_bottom(new osg::Group),
layer_transform(new osg::MatrixTransform),
cloud_alpha(1.0),
texture_path(tex_path),
layer_span(0.0),
layer_asl(0.0),
layer_thickness(0.0),
layer_transition(0.0),
layer_visibility(25.0),
layer_coverage(SD_CLOUD_CLEAR),
scale(4000.0),
speed(0.0),
direction(0.0),
/*last_course(0.0),*/
max_alpha(1.0)
{
cloud_root->addChild(layer_root.get(), true);
layer_root->addChild(group_bottom.get());
layer_root->addChild(group_top.get());
osg::ref_ptr<osg::StateSet> rootSet = new osg::StateSet;
rootSet = layer_root->getOrCreateStateSet();
rootSet->setRenderBinDetails( 9, "DepthSortedBin");
rootSet->setTextureAttribute(0, new osg::TexMat);
rootSet->setMode(GL_CULL_FACE, osg::StateAttribute::ON);
// Combiner for fog color and cloud alpha
osg::TexEnvCombine* combine0 = new osg::TexEnvCombine;
osg::TexEnvCombine* combine1 = new osg::TexEnvCombine;
combine0->setCombine_RGB(osg::TexEnvCombine::MODULATE);
combine0->setSource0_RGB(osg::TexEnvCombine::PREVIOUS);
combine0->setOperand0_RGB(osg::TexEnvCombine::SRC_COLOR);
combine0->setSource1_RGB(osg::TexEnvCombine::TEXTURE0);
combine0->setOperand1_RGB(osg::TexEnvCombine::SRC_COLOR);
combine0->setCombine_Alpha(osg::TexEnvCombine::MODULATE);
combine0->setSource0_Alpha(osg::TexEnvCombine::PREVIOUS);
combine0->setOperand0_Alpha(osg::TexEnvCombine::SRC_ALPHA);
combine0->setSource1_Alpha(osg::TexEnvCombine::TEXTURE0);
combine0->setOperand1_Alpha(osg::TexEnvCombine::SRC_ALPHA);
combine1->setCombine_RGB(osg::TexEnvCombine::MODULATE);
combine1->setSource0_RGB(osg::TexEnvCombine::PREVIOUS);
combine1->setOperand0_RGB(osg::TexEnvCombine::SRC_COLOR);
combine1->setSource1_RGB(osg::TexEnvCombine::CONSTANT);
combine1->setOperand1_RGB(osg::TexEnvCombine::SRC_COLOR);
combine1->setCombine_Alpha(osg::TexEnvCombine::MODULATE);
combine1->setSource0_Alpha(osg::TexEnvCombine::PREVIOUS);
combine1->setOperand0_Alpha(osg::TexEnvCombine::SRC_ALPHA);
combine1->setSource1_Alpha(osg::TexEnvCombine::CONSTANT);
combine1->setOperand1_Alpha(osg::TexEnvCombine::SRC_ALPHA);
combine1->setDataVariance(osg::Object::DYNAMIC);
rootSet->setTextureAttributeAndModes(0, combine0);
rootSet->setTextureAttributeAndModes(1, combine1);
rootSet->setTextureMode(1, GL_TEXTURE_2D, osg::StateAttribute::ON);
osg::Image *dummyImage = new osg::Image;
dummyImage->allocateImage(1, 1, 1, GL_LUMINANCE_ALPHA,
GL_UNSIGNED_BYTE);
unsigned char* imageBytes = dummyImage->data(0, 0);
imageBytes[0] = 255;
imageBytes[1] = 255;
osg::ref_ptr<osg::Texture2D> WhiteTexture = new osg::Texture2D;
WhiteTexture->setImage(dummyImage);
WhiteTexture->setWrap(osg::Texture::WRAP_S, osg::Texture::REPEAT);
WhiteTexture->setWrap(osg::Texture::WRAP_T, osg::Texture::REPEAT);
WhiteTexture->setDataVariance(osg::Object::STATIC);
rootSet->setTextureAttributeAndModes(1, WhiteTexture, osg::StateAttribute::ON);
rootSet->setDataVariance(osg::Object::DYNAMIC);
// Ensure repeatability of the random seed within 10 minutes,
// to keep multi-computer systems in sync.
SDRandom();
base = osg::Vec2(SDRandom(), SDRandom());
group_top->addChild(layer_transform.get());
group_bottom->addChild(layer_transform.get());
//layer3D = new SGCloudField();
//cloud_root->addChild(layer3D->getNode(), false);
rebuild();
}
// Destructor
SDCloudLayer::~SDCloudLayer()
{
//delete layer3D;
}
float SDCloudLayer::getSpan_m () const
{
return layer_span;
}
void SDCloudLayer::setSpan_m (float span_m)
{
if (span_m != layer_span)
{
layer_span = span_m;
rebuild();
}
}
float SDCloudLayer::getElevation_m () const
{
return layer_asl;
}
void SDCloudLayer::setElevation_m (float elevation_m, bool set_span)
{
layer_asl = elevation_m;
if (set_span)
{
if (elevation_m > 4000)
setSpan_m( elevation_m * 10 );
else
setSpan_m( 40000 );
}
}
float SDCloudLayer::getThickness_m () const
{
return layer_thickness;
}
void SDCloudLayer::setThickness_m (float thickness_m)
{
layer_thickness = thickness_m;
}
float SDCloudLayer::getVisibility_m() const
{
return layer_visibility;
}
void SDCloudLayer::setVisibility_m (float visibility_m)
{
layer_visibility = visibility_m;
}
float SDCloudLayer::getTransition_m () const
{
return layer_transition;
}
void SDCloudLayer::setTransition_m (float transition_m)
{
layer_transition = transition_m;
}
SDCloudLayer::Coverage
SDCloudLayer::getCoverage () const
{
return layer_coverage;
}
void SDCloudLayer::setCoverage (Coverage coverage)
{
if (coverage != layer_coverage)
{
layer_coverage = coverage;
rebuild();
}
}
const std::string &SDCloudLayer::getCoverageString( Coverage coverage )
{
switch( coverage )
{
case SD_CLOUD_OVERCAST:
return SD_CLOUD_OVERCAST_STRING;
case SD_CLOUD_BROKEN:
return SD_CLOUD_BROKEN_STRING;
case SD_CLOUD_SCATTERED:
return SD_CLOUD_SCATTERED_STRING;
case SD_CLOUD_FEW:
return SD_CLOUD_FEW_STRING;
case SD_CLOUD_CIRRUS:
return SD_CLOUD_CIRRUS_STRING;
case SD_CLOUD_CLEAR:
default:
return SD_CLOUD_CLEAR_STRING;
}
}
SDCloudLayer::Coverage
SDCloudLayer::getCoverageType( const std::string &coverage )
{
if( SD_CLOUD_OVERCAST_STRING == coverage )
{
return SD_CLOUD_OVERCAST;
} else if( SD_CLOUD_BROKEN_STRING == coverage )
{
return SD_CLOUD_BROKEN;
} else if( SD_CLOUD_SCATTERED_STRING == coverage )
{
return SD_CLOUD_SCATTERED;
} else if( SD_CLOUD_FEW_STRING == coverage )
{
return SD_CLOUD_FEW;
} else if( SD_CLOUD_CIRRUS_STRING == coverage )
{
return SD_CLOUD_CIRRUS;
} else
{
return SD_CLOUD_CLEAR;
}
}
const std::string &SDCloudLayer::getCoverageString() const
{
return getCoverageString(layer_coverage);
}
void SDCloudLayer::setCoverageString( const std::string &coverage )
{
setCoverage( getCoverageType(coverage) );
}
void SDCloudLayer::setTextureOffset(const osg::Vec2& offset)
{
osg::StateAttribute* attr = layer_root->getStateSet()
->getTextureAttribute(0, osg::StateAttribute::TEXMAT);
osg::TexMat* texMat = dynamic_cast<osg::TexMat*>(attr);
if (!texMat)
return;
texMat->setMatrix(osg::Matrix::translate(offset[0], offset[1], 0.0));
}
// colors for debugging the cloud layers
Vec3 cloudColors[] = {Vec3(1.0f, 1.0f, 1.0f), Vec3(1.0f, 1.0f, 1.0f),
Vec3(1.0f, 1.0f, 1.0f), Vec3(1.0f, 1.0f, 1.0f)};
// build the cloud object
void SDCloudLayer::rebuild()
{
if ( !state_initialized )
{
state_initialized = true;
GfOut("initializing cloud layers\n");
cubeMap = new osg::TextureCubeMap;
cubeMap->setFilter(osg::Texture::MIN_FILTER, osg::Texture::LINEAR);
cubeMap->setFilter(osg::Texture::MAG_FILTER, osg::Texture::LINEAR);
cubeMap->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
cubeMap->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
cubeMap->setWrap(osg::Texture::WRAP_R, osg::Texture::CLAMP_TO_EDGE);
const int size = 32;
const float half_size = 16.0f;
const float offset = 0.5f;
osg::Vec3 zero_normal(0.5, 0.5, 0.5);
osg::Image* image = new osg::Image;
image->allocateImage(size, size, 1, GL_RGB, GL_UNSIGNED_BYTE);
unsigned char *ptr = image->data(0, 0);
for (int j = 0; j < size; j++ )
{
for (int i = 0; i < size; i++ )
{
osg::Vec3 tmp(half_size, -( j + offset - half_size ),
-( i + offset - half_size ) );
tmp.normalize();
tmp = tmp*0.5 - zero_normal;
*ptr++ = (unsigned char)( tmp[ 0 ] * 255 );
*ptr++ = (unsigned char)( tmp[ 1 ] * 255 );
*ptr++ = (unsigned char)( tmp[ 2 ] * 255 );
}
}
cubeMap->setImage(osg::TextureCubeMap::POSITIVE_X, image);
image = new osg::Image;
image->allocateImage(size, size, 1, GL_RGB, GL_UNSIGNED_BYTE);
ptr = image->data(0, 0);
for (int j = 0; j < size; j++ )
{
for (int i = 0; i < size; i++ )
{
osg::Vec3 tmp(-half_size, -( j + offset - half_size ),
( i + offset - half_size ) );
tmp.normalize();
tmp = tmp*0.5 - zero_normal;
*ptr++ = (unsigned char)( tmp[ 0 ] * 255 );
*ptr++ = (unsigned char)( tmp[ 1 ] * 255 );
*ptr++ = (unsigned char)( tmp[ 2 ] * 255 );
}
}
cubeMap->setImage(osg::TextureCubeMap::NEGATIVE_X, image);
image = new osg::Image;
image->allocateImage(size, size, 1, GL_RGB, GL_UNSIGNED_BYTE);
ptr = image->data(0, 0);
for (int j = 0; j < size; j++ )
{
for (int i = 0; i < size; i++ )
{
osg::Vec3 tmp(( i + offset - half_size ), half_size,
( j + offset - half_size ) );
tmp.normalize();
tmp = tmp*0.5 - zero_normal;
*ptr++ = (unsigned char)( tmp[ 0 ] * 255 );
*ptr++ = (unsigned char)( tmp[ 1 ] * 255 );
*ptr++ = (unsigned char)( tmp[ 2 ] * 255 );
}
}
cubeMap->setImage(osg::TextureCubeMap::POSITIVE_Y, image);
image = new osg::Image;
image->allocateImage(size, size, 1, GL_RGB, GL_UNSIGNED_BYTE);
ptr = image->data(0, 0);
for (int j = 0; j < size; j++ )
{
for (int i = 0; i < size; i++ )
{
osg::Vec3 tmp(( i + offset - half_size ), -half_size,
-( j + offset - half_size ) );
tmp.normalize();
tmp = tmp*0.5 - zero_normal;
*ptr++ = (unsigned char)( tmp[ 0 ] * 255 );
*ptr++ = (unsigned char)( tmp[ 1 ] * 255 );
*ptr++ = (unsigned char)( tmp[ 2 ] * 255 );
}
}
cubeMap->setImage(osg::TextureCubeMap::NEGATIVE_Y, image);
image = new osg::Image;
image->allocateImage(size, size, 1, GL_RGB, GL_UNSIGNED_BYTE);
ptr = image->data(0, 0);
for (int j = 0; j < size; j++ )
{
for (int i = 0; i < size; i++ )
{
osg::Vec3 tmp(( i + offset - half_size ),
-( j + offset - half_size ), half_size );
tmp.normalize();
tmp = tmp*0.5 - zero_normal;
*ptr++ = (unsigned char)( tmp[ 0 ] * 255 );
*ptr++ = (unsigned char)( tmp[ 1 ] * 255 );
*ptr++ = (unsigned char)( tmp[ 2 ] * 255 );
}
}
cubeMap->setImage(osg::TextureCubeMap::POSITIVE_Z, image);
image = new osg::Image;
image->allocateImage(size, size, 1, GL_RGB, GL_UNSIGNED_BYTE);
ptr = image->data(0, 0);
for (int j = 0; j < size; j++ )
{
for (int i = 0; i < size; i++ )
{
osg::Vec3 tmp(-( i + offset - half_size ),
-( j + offset - half_size ), -half_size );
tmp.normalize();
tmp = tmp*0.5 - zero_normal;
*ptr++ = (unsigned char)( tmp[ 0 ] * 255 );
*ptr++ = (unsigned char)( tmp[ 1 ] * 255 );
*ptr++ = (unsigned char)( tmp[ 2 ] * 255 );
}
}
cubeMap->setImage(osg::TextureCubeMap::NEGATIVE_Z, image);
osg::StateSet* state;
state = SDMakeState(texture_path, "overcast.png", "overcast_n.png");
layer_states[SD_CLOUD_OVERCAST] = state;
state = SDMakeState(texture_path, "overcast_top.png", "overcast_top_n.png");
layer_states2[SD_CLOUD_OVERCAST] = state;
state = SDMakeState(texture_path, "broken.png", "broken_n.png");
layer_states[SD_CLOUD_BROKEN] = state;
layer_states2[SD_CLOUD_BROKEN] = state;
state = SDMakeState(texture_path, "scattered.png", "scattered_n.png");
layer_states[SD_CLOUD_SCATTERED] = state;
layer_states2[SD_CLOUD_SCATTERED] = state;
state = SDMakeState(texture_path, "few.png", "few_n.png");
layer_states[SD_CLOUD_FEW] = state;
layer_states2[SD_CLOUD_FEW] = state;
state = SDMakeState(texture_path, "cirrus.png", "cirrus_n.png");
layer_states[SD_CLOUD_CIRRUS] = state;
layer_states2[SD_CLOUD_CIRRUS] = state;
layer_states[SD_CLOUD_CLEAR] = 0;
layer_states2[SD_CLOUD_CLEAR] = 0;
// experimental optimization that may not make any difference
// at all :/
osg::CopyOp copyOp;
for (int i = 0; i < SD_MAX_CLOUD_COVERAGES; ++i)
{
//SDStateAttributeFactory *saf = SDStateAttributeFactory::instance();
if (layer_states[i].valid())
{
if (layer_states[i] == layer_states2[i])
layer_states2[i] = static_cast<osg::StateSet*>(layer_states[i]->clone(copyOp));
osg::ref_ptr<CullFace> CullFaceFront = new CullFace(CullFace::FRONT);
CullFaceFront->setDataVariance(Object::STATIC);
layer_states[i]->setAttribute(CullFaceFront);
osg::ref_ptr<osg::CullFace> CullFaceBack = new CullFace(CullFace::BACK);
CullFaceBack->setDataVariance(Object::STATIC);
layer_states2[i]->setAttribute(CullFaceBack);
}
}
}
scale = 4000.0;
setTextureOffset(base);
const float layer_scale = layer_span / scale;
const float mpi = SD_PI/4;
const float layer_to_core = (SD_EARTH_RAD * 1000 + layer_asl);
const float layer_angle = 0.5 * layer_span / layer_to_core;
const float border_to_core = layer_to_core * cos(layer_angle);
const float alt_diff = layer_to_core - border_to_core;
for (int i = 0; i < 4; i++)
{
if ( layer[i] != NULL )
{
layer_transform->removeChild(layer[i].get());
}
vl[i] = new osg::Vec3Array;
cl[i] = new osg::Vec4Array;
tl[i] = new osg::Vec2Array;
osg::Vec3 vertex(layer_span*(i-2)/2, -layer_span,
alt_diff * (sin(i*mpi) - 2));
osg::Vec2 tc(layer_scale * i/4, 0.0f);
osg::Vec4 color(cloudColors[0], (i == 0) ? 0.0f : 0.15f);
cl[i]->push_back(color);
vl[i]->push_back(vertex);
tl[i]->push_back(tc);
for (int j = 0; j < 4; j++)
{
vertex = osg::Vec3(layer_span*(i-1)/2, layer_span*(j-2)/2,
alt_diff * (sin((i+1)*mpi) + sin(j*mpi) - 2));
tc = osg::Vec2(layer_scale * (i+1)/4, layer_scale * j/4);
color = osg::Vec4(cloudColors[0],
( (j == 0) || (i == 3)) ?
( (j == 0) && (i == 3)) ? 0.0f : 0.15f : 1.0f );
cl[i]->push_back(color);
vl[i]->push_back(vertex);
tl[i]->push_back(tc);
vertex = osg::Vec3(layer_span*(i-2)/2, layer_span*(j-1)/2,
alt_diff * (sin(i*mpi) + sin((j+1)*mpi) - 2) );
tc = osg::Vec2(layer_scale * i/4, layer_scale * (j+1)/4 );
color = osg::Vec4(cloudColors[0],
((j == 3) || (i == 0)) ?
((j == 3) && (i == 0)) ? 0.0f : 0.15f : 1.0f );
cl[i]->push_back(color);
vl[i]->push_back(vertex);
tl[i]->push_back(tc);
}
vertex = osg::Vec3(layer_span*(i-1)/2, layer_span,
alt_diff * (sin((i+1)*mpi) - 2));
tc = osg::Vec2(layer_scale * (i+1)/4, layer_scale);
color = osg::Vec4(cloudColors[0], (i == 3) ? 0.0f : 0.15f );
cl[i]->push_back( color );
vl[i]->push_back( vertex );
tl[i]->push_back( tc );
osg::Geometry* geometry = new osg::Geometry;
geometry->setUseDisplayList(false);
geometry->setVertexArray(vl[i].get());
geometry->setNormalBinding(osg::Geometry::BIND_OFF);
geometry->setColorArray(cl[i].get());
geometry->setColorBinding(osg::Geometry::BIND_PER_VERTEX);
geometry->setTexCoordArray(0, tl[i].get());
geometry->addPrimitiveSet(new osg::DrawArrays(GL_TRIANGLE_STRIP, 0, vl[i]->size()));
layer[i] = new osg::Geode;
std::stringstream sstr;
sstr << "Cloud Layer (" << i << ")";
geometry->setName(sstr.str());
layer[i]->setName(sstr.str());
layer[i]->addDrawable(geometry);
layer_transform->addChild(layer[i].get());
}
if ( layer_states[layer_coverage].valid() )
{
osg::CopyOp copyOp;
osg::StateSet* stateSet = static_cast<osg::StateSet*>(layer_states2[layer_coverage]->clone(copyOp));
stateSet->setDataVariance(osg::Object::DYNAMIC);
group_top->setStateSet(stateSet);
stateSet = static_cast<osg::StateSet*>(layer_states[layer_coverage]->clone(copyOp));
stateSet->setDataVariance(osg::Object::DYNAMIC);
group_bottom->setStateSet(stateSet);
}
}
bool SDCloudLayer::repaint( const osg::Vec3f& fog_color )
{
osg::Vec4f combineColor(fog_color, cloud_alpha);
osg::TexEnvCombine* combiner
= dynamic_cast<osg::TexEnvCombine*>(layer_root->getStateSet()
->getTextureAttribute(1, osg::StateAttribute::TEXENV));
combiner->setConstantColor(combineColor);
return true;
}
bool SDCloudLayer::reposition( const osg::Vec3f& p, double dt )
{
if (getCoverage() != SDCloudLayer::SD_CLOUD_CLEAR)
{
osg::Vec3 asl_offset( p );
asl_offset.normalize();
if ( p.y() <= layer_asl )
{
asl_offset *= layer_asl;
} else
{
asl_offset *= layer_asl + layer_thickness;
}
asl_offset += p;
osg::Matrix T, LON, LAT;
T.makeTranslate( asl_offset );
//LON.makeRotate(lon, osg::Vec3(0, 0, 1));
//LAT.makeRotate(90.0 * SD_DEGREES_TO_RADIANS - lat, osg::Vec3(0, 1, 0));
layer_transform->setMatrix( T );
group_bottom->getStateSet()->setRenderBinDetails(-(int)layer_asl, "RenderBin");
group_top->getStateSet()->setRenderBinDetails((int)layer_asl, "RenderBin");
if ( alt <= layer_asl )
{
layer_root->setSingleChildOn(0);
} else if ( alt >= layer_asl + layer_thickness )
{
layer_root->setSingleChildOn(1);
} else
{
layer_root->setAllChildrenOff();
}
double sp_dist = speed * dt;
if ( p.x() != last_x || p.y() != last_y || sp_dist != 0 )
{
double ax = 0.0, ay = 0.0, bx = 0.0, by = 0.0;
if (sp_dist > 0)
{
bx = cos((180.0-direction) * SD_DEGREES_TO_RADIANS) * sp_dist;
by = sin((180.0-direction) * SD_DEGREES_TO_RADIANS) * sp_dist;
}
double xoff = (ax + bx) / (2 * scale);
double yoff = (ay + by) / (2 * scale);
const float layer_scale = layer_span / scale;
base[0] += xoff;
if ( base[0] > -10.0 && base[0] < 10.0 )
{
base[0] -= (int)base[0];
} else
{
base[0] = 0.0;
}
base[1] += yoff;
if ( base[1] > -10.0 && base[1] < 10.0 )
{
base[1] -= (int)base[1];
} else
{
base[1] = 0.0;
}
setTextureOffset(base);
last_pos = p;
}
}
//layer3D->reposition( p, up, lon, lat, dt, layer_asl, speed, direction);
return true;
}
/*void SDCloudLayer::set_enable3dClouds(bool enable)
{
if (layer3D->isDefined3D() && enable)
{
cloud_root->setChildValue(layer3D->getNode(), true);
cloud_root->setChildValue(layer_root.get(), false);
} else
{
cloud_root->setChildValue(layer3D->getNode(), false);
cloud_root->setChildValue(layer_root.get(), true);
}
}*/

171
src/modules/graphic/osggraph/OsgCloud.h Normal file
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@ -0,0 +1,171 @@
/***************************************************************************
file : OsgCloud.h
created : Wen Mar 27 00:00:41 CEST 2013
copyright : (C) 2013 by Xavier Bertaux
email : bertauxx@yahoo.fr
version : $Id: OsgCloud.h 4693 2013-03-27 03:12:09Z torcs-ng $
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#ifndef _OSGCLOUD_H
#define _OSGCLOUD_H
#include <string>
using std::string;
#include <osg/ref_ptr>
#include <osg/Array>
#include <osg/Geode>
#include <osg/Group>
#include <osg/MatrixTransform>
#include <osg/Switch>
//class SDCloudField;
class SDCloudLayer
{
public:
enum Coverage
{
SD_CLOUD_OVERCAST = 0,
SD_CLOUD_BROKEN,
SD_CLOUD_SCATTERED,
SD_CLOUD_FEW,
SD_CLOUD_CIRRUS,
SD_CLOUD_CLEAR,
SD_MAX_CLOUD_COVERAGES
};
static const std::string SD_CLOUD_OVERCAST_STRING; // "overcast"
static const std::string SD_CLOUD_BROKEN_STRING; // "broken"
static const std::string SD_CLOUD_SCATTERED_STRING; // "scattered"
static const std::string SD_CLOUD_FEW_STRING; // "few"
static const std::string SD_CLOUD_CIRRUS_STRING; // "cirrus"
static const std::string SD_CLOUD_CLEAR_STRING; // "clear"
SDCloudLayer( const string &tex_path );
~SDCloudLayer( void );
/** get the cloud span (in meters) */
float getSpan_m () const;
void setSpan_m (float span_m);
float getElevation_m () const;
void setElevation_m (float elevation_m, bool set_span = true);
float getThickness_m () const;
void setThickness_m (float thickness_m);
float getVisibility_m() const;
void setVisibility_m(float visibility_m);
float getTransition_m () const;
void setTransition_m (float transition_m);
Coverage getCoverage () const;
void setCoverage (Coverage coverage);
const string & getCoverageString() const;
static const string & getCoverageString( Coverage coverage );
static Coverage getCoverageType( const std::string & coverage );
void setCoverageString( const string & coverage );
inline void setDirection(float dir)
{
// cout << "cloud dir = " << dir << endl;
direction = dir;
}
inline float getDirection() { return direction; }
inline void setSpeed(float sp)
{
// cout << "cloud speed = " << sp << endl;
speed = sp;
}
inline float getSpeed() { return speed; }
inline void setAlpha( float alpha )
{
if ( alpha < 0.0 ) { alpha = 0.0; }
if ( alpha > max_alpha ) { alpha = max_alpha; }
cloud_alpha = alpha;
}
inline void setMaxAlpha( float alpha )
{
if ( alpha < 0.0 ) { alpha = 0.0; }
if ( alpha > 1.0 ) { alpha = 1.0; }
max_alpha = alpha;
}
inline float getMaxAlpha() const
{
return max_alpha;
}
void rebuild();
//void set_enable3dClouds(bool enable);
bool repaint( const osg::Vec3f& fog_color );
bool reposition(const osg::Vec3f& p, double dt );
osg::Switch* getNode() { return cloud_root.get(); }
/** return the 3D layer cloud associated with this 2D layer */
//SDCloudField *get_layer3D(void) { return layer3D; }
protected:
void setTextureOffset(const osg::Vec2& offset);
private:
osg::ref_ptr<osg::Switch> cloud_root;
osg::ref_ptr<osg::Switch> layer_root;
osg::ref_ptr<osg::Group> group_top, group_bottom;
osg::ref_ptr<osg::MatrixTransform> layer_transform;
osg::ref_ptr<osg::Geode> layer[4];
float cloud_alpha; // 1.0 = drawn fully, 0.0 faded out completely
osg::ref_ptr<osg::Vec4Array> cl[4];
osg::ref_ptr<osg::Vec3Array> vl[4];
osg::ref_ptr<osg::Vec2Array> tl[4];
osg::ref_ptr<osg::Vec3Array> tl2[4];
// height above sea level (meters)
std::string texture_path;
float layer_span;
float layer_asl;
float layer_thickness;
float layer_transition;
float layer_visibility;
Coverage layer_coverage;
float scale;
float speed;
float direction;
float alt;
//SGGeod last_pos;
osg::Vec3f last_pos;
double max_alpha;
double last_x, last_y;
osg::Vec2 base;
//SDCloudField *layer3D;
};
#endif // _OSGCLOUD_H

1
src/modules/graphic/osggraph/OsgMath.h
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@ -50,6 +50,7 @@
#define SD_DEGREES_TO_RADIANS (SD_PI/SD_180)
#define SD_RADIANS_TO_DEGREES (SD_180/SD_PI)
#define SD_EARTH_RAD 6378.155
typedef float osgMat3[3][3];