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From David Callu, further work in support of shapefile support in VirtualPlanetBuilder

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This commit is contained in:
Robert Osfield
2007-12-26 21:39:29 +00:00
parent 9d29cc53dc
commit 2aca19a4e6
10 changed files with 308 additions and 58 deletions
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105
src/osgUtil/ReversePrimitiveFunctor.cpp
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@@ -97,6 +97,76 @@ osg::PrimitiveSet * drawElementsTemplate(GLenum mode,GLsizei count, const typena
namespace osgUtil {
void ReversePrimitiveFunctor::drawArrays(GLenum mode, GLint first, GLsizei count)
{
if (count==0) return ;
osg::DrawElementsUInt * dePtr = new osg::DrawElementsUInt(mode);
osg::DrawElementsUInt & de = *dePtr;
de.reserve(count);
GLint end = first + count;
switch (mode)
{
case (GL_TRIANGLES):
{
for (GLint i=first; i<end; i+=3)
{
de.push_back(i);
de.push_back(i+2);
de.push_back(i+1);
}
break;
}
case (GL_QUADS):
{
for (GLint i=first; i<end; i+=4)
{
de.push_back(i);
de.push_back(i+3);
de.push_back(i+2);
de.push_back(i+1);
}
break;
}
case (GL_TRIANGLE_STRIP):
case (GL_QUAD_STRIP):
{
for (GLint i=first; i<end; i+=2)
{
de.push_back(i+1);
de.push_back(i);
}
break;
}
case (GL_TRIANGLE_FAN):
{
de.push_back(first);
for (GLint i=end-1; i>first; i--)
de.push_back(i);
break;
}
case (GL_POLYGON):
case (GL_POINTS):
case (GL_LINES):
case (GL_LINE_STRIP):
case (GL_LINE_LOOP):
{
for (GLint i=end-1; i>=first; i--)
de.push_back(i);
break;
}
default:
break;
}
_reversedPrimitiveSet = &de;
}
void ReversePrimitiveFunctor::drawElements(GLenum mode,GLsizei count,const GLubyte* indices)
{
_reversedPrimitiveSet = drawElementsTemplate<osg::DrawElementsUByte>(mode, count, indices);
@@ -110,4 +180,39 @@ void ReversePrimitiveFunctor::drawElements(GLenum mode,GLsizei count,const GLuin
_reversedPrimitiveSet = drawElementsTemplate<osg::DrawElementsUInt>(mode, count, indices);
}
void ReversePrimitiveFunctor::begin(GLenum mode)
{
if (_running)
osg::notify(osg::WARN) << "ReversePrimitiveFunctor : call \"begin\" without call \"end\"." << std::endl;
else
{
_running = true;
_reversedPrimitiveSet = new osg::DrawElementsUInt(mode);
}
}
void ReversePrimitiveFunctor::vertex(unsigned int pos)
{
if (_running == false)
osg::notify(osg::WARN) << "ReversePrimitiveFunctor : call \"vertex(" << pos << ")\" without call \"begin\"." << std::endl;
else
{
static_cast<osg::DrawElementsUInt*>(_reversedPrimitiveSet.get())->push_back(pos);
}
}
void ReversePrimitiveFunctor::end()
{
if (_running == false)
osg::notify(osg::WARN) << "ReversePrimitiveFunctor : call \"end\" without call \"begin\"." << std::endl;
else
{
_running = false;
osg::ref_ptr<osg::DrawElementsUInt> tmpDe(static_cast<osg::DrawElementsUInt*>(_reversedPrimitiveSet.get()));
_reversedPrimitiveSet = drawElementsTemplate<osg::DrawElementsUInt>(tmpDe->getMode(), tmpDe->size(), &(tmpDe->front()));
}
}
} // end osgUtil namespace