FGFS-4.1/OpenSceneGraph
4
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

From Mike Weiblen, added check to make sure that vertex texture was

Browse Source 
supported in the OpenGL driver.
This commit is contained in:
Robert Osfield
2005-10-28 08:35:55 +00:00
parent 52b7ce608e
commit 839f2058cc
1 changed files with 49 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

70
examples/osgshaderterrain/osgshaderterrain.cpp
View File

@@ -4,15 +4,19 @@
#include <osg/Depth>
#include <osg/Geode>
#include <osg/Geometry>
#include <osg/GL2Extensions>
#include <osg/Material>
#include <osg/Math>
#include <osg/MatrixTransform>
#include <osg/PolygonOffset>
#include <osg/Program>
#include <osg/Projection>
#include <osg/Shader>
#include <osg/ShapeDrawable>
#include <osg/StateSet>
#include <osg/Switch>
#include <osg/Texture2D>
#include <osg/Uniform>
#include <osgDB/ReadFile>
#include <osgDB/FileUtils>
@@ -505,11 +509,11 @@ osg::Node* ForestTechniqueManager::createScene(unsigned int /*numTreesToCreates*
float max_z = -FLT_MAX;
for(r=0;r<numRows;++r)
{
for(c=0;c<numColumns;++c)
{
min_z = osg::minimum(min_z,vertex[r+c*numRows][2]);
max_z = osg::maximum(max_z,vertex[r+c*numRows][2]);
}
for(c=0;c<numColumns;++c)
{
min_z = osg::minimum(min_z,vertex[r+c*numRows][2]);
max_z = osg::maximum(max_z,vertex[r+c*numRows][2]);
}
}
float scale_z = size.z()/(max_z-min_z);
@@ -519,10 +523,10 @@ osg::Node* ForestTechniqueManager::createScene(unsigned int /*numTreesToCreates*
terrainImage->setInternalTextureFormat(GL_LUMINANCE_FLOAT32_ATI);
for(r=0;r<numRows;++r)
{
for(c=0;c<numColumns;++c)
{
*((float*)(terrainImage->data(c,r))) = (vertex[r+c*numRows][2]-min_z)*scale_z;
}
for(c=0;c<numColumns;++c)
{
*((float*)(terrainImage->data(c,r))) = (vertex[r+c*numRows][2]-min_z)*scale_z;
}
}
osg::Texture2D* terrainTexture = new osg::Texture2D;
@@ -536,10 +540,10 @@ osg::Node* ForestTechniqueManager::createScene(unsigned int /*numTreesToCreates*
osg::Image* image = osgDB::readImageFile("Images/lz.rgb");
if (image)
{
osg::Texture2D* texture = new osg::Texture2D;
osg::Texture2D* texture = new osg::Texture2D;
texture->setImage(image);
stateset->setTextureAttributeAndModes(1,texture,osg::StateAttribute::ON);
texture->setImage(image);
stateset->setTextureAttributeAndModes(1,texture,osg::StateAttribute::ON);
}
{
@@ -629,13 +633,13 @@ osg::Node* ForestTechniqueManager::createScene(unsigned int /*numTreesToCreates*
{
pos.x() = origin.x();
tex.x() = 0.0f;
for(c=0;c<numColumns;++c)
{
v[vi].set(pos.x(),pos.y(),pos.z());
for(c=0;c<numColumns;++c)
{
v[vi].set(pos.x(),pos.y(),pos.z());
pos.x()+=columnCoordDelta;
tex.x()+=columnTexDelta;
++vi;
}
}
pos.y() += rowCoordDelta;
tex.y() += rowTexDelta;
}
@@ -649,11 +653,11 @@ osg::Node* ForestTechniqueManager::createScene(unsigned int /*numTreesToCreates*
osg::DrawElementsUShort& drawElements = *(new osg::DrawElementsUShort(GL_QUAD_STRIP,2*numColumns));
geometry->addPrimitiveSet(&drawElements);
int ei=0;
for(c=0;c<numColumns;++c)
{
drawElements[ei++] = (r+1)*numColumns+c;
drawElements[ei++] = (r)*numColumns+c;
}
for(c=0;c<numColumns;++c)
{
drawElements[ei++] = (r+1)*numColumns+c;
drawElements[ei++] = (r)*numColumns+c;
}
}
geometry->setInitialBound(osg::BoundingBox(origin, origin+size));
@@ -774,6 +778,30 @@ int main( int argc, char **argv )
// create the windows and run the threads.
viewer.realize();
// not all hardware can support vertex texturing, so check first.
for(unsigned int contextID = 0;
contextID<viewer.getDisplaySettings()->getMaxNumberOfGraphicsContexts();
++contextID)
{
osg::GL2Extensions* gl2ext = osg::GL2Extensions::Get(contextID,false);
if( gl2ext )
{
if( !gl2ext->isGlslSupported() )
{
std::cout<<"ERROR: GLSL not supported by OpenGL driver."<<std::endl;
return 1;
}
GLint numVertexTexUnits = 0;
glGetIntegerv( GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS, &numVertexTexUnits );
if( numVertexTexUnits <= 0 )
{
std::cout<<"ERROR: vertex texturing not supported by OpenGL driver."<<std::endl;
return 1;
}
}
}
while( !viewer.done() )
{
// wait for all cull and draw threads to complete.