79 lines
1.9 KiB
C++
79 lines
1.9 KiB
C++
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#include <math.h>
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#include <osg/Geode>
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#include <osg/Geometry>
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#include <osg/Texture2D>
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#include <osg/TexEnv>
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#include <osg/Depth>
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#include <osg/StateSet>
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#include <osgDB/ReadFile>
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using namespace osg;
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Node *makeBase( void )
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{
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int i, c;
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float theta;
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float ir = 20.0f;
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Vec3Array *coords = new Vec3Array(19);
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Vec2Array *tcoords = new Vec2Array(19);
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Vec4Array *colors = new Vec4Array(1);
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(*colors)[0].set(1.0f,1.0f,1.0f,1.0f);
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c = 0;
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(*coords)[c].set(0.0f,0.0f,0.0f);
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(*tcoords)[c].set(0.0f,0.0f);
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for( i = 0; i <= 18; i++ )
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{
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theta = osg::DegreesToRadians((float)i * 20.0);
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(*coords)[c].set(ir * cosf( theta ), ir * sinf( theta ), 0.0f);
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(*tcoords)[c].set((*coords)[c][0]/36.0f,(*coords)[c][1]/36.0f);
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c++;
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}
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Geometry *geom = new Geometry;
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geom->setVertexArray( coords );
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geom->setTexCoordArray( 0, tcoords );
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geom->setColorArray( colors );
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geom->setColorBinding( Geometry::BIND_OVERALL );
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geom->addPrimitiveSet( new DrawArrays(PrimitiveSet::TRIANGLE_FAN,0,19) );
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Texture2D *tex = new Texture2D;
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tex->setImage(osgDB::readImageFile("Images/water.rgb"));
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tex->setWrap( Texture2D::WRAP_S, Texture2D::REPEAT );
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tex->setWrap( Texture2D::WRAP_T, Texture2D::REPEAT );
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StateSet *dstate = new StateSet;
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dstate->setMode( GL_LIGHTING, StateAttribute::OFF );
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dstate->setTextureAttributeAndModes(0, tex, StateAttribute::ON );
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dstate->setTextureAttribute(0, new TexEnv );
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// clear the depth to the far plane.
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osg::Depth* depth = new osg::Depth;
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depth->setFunction(osg::Depth::ALWAYS);
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depth->setRange(1.0,1.0);
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dstate->setAttributeAndModes(depth,StateAttribute::ON );
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dstate->setRenderBinDetails(-1,"RenderBin");
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geom->setStateSet( dstate );
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Geode *geode = new Geode;
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geode->addDrawable( geom );
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return geode;
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}
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