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Added multi-textured city illumination

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This commit is contained in:
Robert Osfield 2004-10-29 15:42:51 +00:00
parent 62adba38ba
commit 8dc722e2a7
1 changed files with 101 additions and 14 deletions
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115
examples/osgplanets/osgplanets.cpp
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@ -11,6 +11,8 @@
#include <osg/Light>
#include <osg/LightSource>
#include <osg/LightModel>
#include <osg/TexEnv>
#include <osg/TexEnvCombine>
#include <osgUtil/Optimizer>
@ -96,6 +98,7 @@ public:
osg::MatrixTransform* createMoonTranslation();
osg::Geode* createSpace( const std::string& name, const std::string& textureName );
osg::Geode* createPlanet( double radius, const std::string& name, const osg::Vec4& color , const std::string& textureName );
osg::Geode* createPlanet( double radius, const std::string& name, const osg::Vec4& color , const std::string& textureName1, const std::string& textureName2);
osg::Group* createSunLight();
osg::Group* built();
@ -254,7 +257,7 @@ int main( int argc, char **argv )
// create light source in the sun
// create earth and moon
osg::Node* earth = solarSystem.createPlanet( solarSystem._radiusEarth, "Earth", osg::Vec4( 0.0f, 0.0f, 1.0f, 1.0f), "Images/land_shallow_topo_2048.jpg" );
osg::Node* earth = solarSystem.createPlanet( solarSystem._radiusEarth, "Earth", osg::Vec4( 1.0f, 1.0f, 1.0f, 1.0f), "Images/land_shallow_topo_2048.jpg", "Images/land_ocean_ice_lights_2048.jpg" );
osg::Node* moon = solarSystem.createPlanet( solarSystem._radiusMoon, "Moon", osg::Vec4( 1.0f, 1.0f, 1.0f, 1.0f), "Images/moon256128.TGA" );
// create transformations for the earthMoonGroup
@ -445,34 +448,99 @@ osg::Geode* SolarSystem::createSpace( const std::string& name, const std::string
}// end SolarSystem::createSpace
osg::Geode* SolarSystem::createPlanet( double radius, const std::string& name, const osg::Vec4& color , const std::string& textureName )
osg::Geode* SolarSystem::createPlanet( double radius, const std::string& name, const osg::Vec4& color , const std::string& textureName)
{
// create a cube shape
osg::Sphere *planetSphere = new osg::Sphere( osg::Vec3( 0.0, 0.0, 0.0 ), radius );
// create a container that makes the sphere drawable
osg::ShapeDrawable *sPlanetSphere = new osg::ShapeDrawable( planetSphere );
osg::Geometry *sPlanetSphere = new osg::Geometry();
{
// set the single colour so bind overall
osg::Vec4Array* colours = new osg::Vec4Array(1);
(*colours)[0] = color;
sPlanetSphere->setColorArray(colours);
sPlanetSphere->setColorBinding(osg::Geometry::BIND_OVERALL);
// now set up the coords, normals and texcoords for geometry
unsigned int numX = 100;
unsigned int numY = 50;
unsigned int numVertices = numX*numY;
osg::Vec3Array* coords = new osg::Vec3Array(numVertices);
sPlanetSphere->setVertexArray(coords);
osg::Vec3Array* normals = new osg::Vec3Array(numVertices);
sPlanetSphere->setNormalArray(normals);
sPlanetSphere->setNormalBinding(osg::Geometry::BIND_PER_VERTEX);
osg::Vec2Array* texcoords = new osg::Vec2Array(numVertices);
sPlanetSphere->setTexCoordArray(0,texcoords);
sPlanetSphere->setTexCoordArray(1,texcoords);
double delta_elevation = osg::PI / (double)(numY-1);
double delta_azim = 2.0*osg::PI / (double)(numX-1);
float delta_tx = 1.0 / (float)(numX-1);
float delta_ty = 1.0 / (float)(numY-1);
double elevation = -osg::PI*0.5;
float ty = 0.0;
unsigned int vert = 0;
unsigned j;
for(j=0;
j<numY;
++j, elevation+=delta_elevation, ty+=delta_ty )
{
double azim = 0.0;
float tx = 0.0;
for(unsigned int i=0;
i<numX;
++i, ++vert, azim+=delta_azim, tx+=delta_tx)
{
osg::Vec3 direction(cos(azim)*cos(elevation), sin(azim)*cos(elevation), sin(elevation));
(*coords)[vert].set(direction*radius);
(*normals)[vert].set(direction);
(*texcoords)[vert].set(tx,ty);
}
}
for(j=0;
j<numY-1;
++j)
{
unsigned int curr_row = j*numX;
unsigned int next_row = curr_row+numX;
osg::DrawElementsUShort* elements = new osg::DrawElementsUShort(GL_QUAD_STRIP);
for(unsigned int i=0;
i<numX;
++i)
{
elements->push_back(next_row + i);
elements->push_back(curr_row + i);
}
sPlanetSphere->addPrimitiveSet(elements);
}
}
// set the object color
sPlanetSphere->setColor( color );
//sPlanetSphere->setColor( color );
// create a geode object to as a container for our drawable sphere object
osg::Geode* geodePlanet = new osg::Geode();
geodePlanet->setName( name );
if( !textureName.empty() )
{
osg::Image* image = osgDB::readImageFile( textureName );
if ( image )
{
sPlanetSphere->getOrCreateStateSet()->setTextureAttributeAndModes( 0, new osg::Texture2D( image ), osg::StateAttribute::ON );
geodePlanet->getOrCreateStateSet()->setTextureAttributeAndModes( 0, new osg::Texture2D( image ), osg::StateAttribute::ON );
// reset the object color to white to allow the texture to set the colour.
sPlanetSphere->setColor( osg::Vec4(1.0f,1.0f,1.0f,1.0f) );
//sPlanetSphere->setColor( osg::Vec4(1.0f,1.0f,1.0f,1.0f) );
}
}
// create a geode object to as a container for our drawable sphere object
osg::Geode* geodePlanet = new osg::Geode();
geodePlanet->setName( name );
// add our drawable sphere to the geode container
geodePlanet->addDrawable( sPlanetSphere );
@ -480,6 +548,25 @@ osg::Geode* SolarSystem::createPlanet( double radius, const std::string& name, c
}// end SolarSystem::createPlanet
osg::Geode* SolarSystem::createPlanet( double radius, const std::string& name, const osg::Vec4& color , const std::string& textureName1, const std::string& textureName2)
{
osg::Geode* geodePlanet = createPlanet( radius, name, color , textureName1);
if( !textureName2.empty() )
{
osg::Image* image = osgDB::readImageFile( textureName2 );
if ( image )
{
osg::StateSet* stateset = geodePlanet->getOrCreateStateSet();
stateset->setTextureAttribute( 1, new osg::TexEnv(osg::TexEnv::ADD));
stateset->setTextureAttributeAndModes( 1, new osg::Texture2D( image ), osg::StateAttribute::ON );
}
}
return( geodePlanet );
}// end SolarSystem::createPlanet
osg::Group* SolarSystem::createSunLight()
{