void AppearanceNode::setGLState(GLRenderState& renderState) const
{
if(material.getValue()!=0)
material.getValue()->setGLState(renderState);
else
{
renderState.disableMaterials();
renderState.emissiveColor=GLRenderState::Color(0.0f,0.0f,0.0f);
}
if(texture.getValue()!=0)
{
texture.getValue()->setGLState(renderState);
if(textureTransform.getValue()!=0)
{
/* Set the texture transformation: */
glMatrixMode(GL_TEXTURE);
glPushMatrix();
glMultMatrix(textureTransform.getValue()->getTransform());
glMatrixMode(GL_MODELVIEW);
}
}
else
renderState.disableTextures();
}
void VariableManager::endRenderPass(GLRenderState& renderState) const
{
/* Restore the OpenGL texture matrix: */
renderState.setMatrixMode(2);
glPopMatrix();
renderState.updateMatrix();
}
void TransformNode::glRenderAction(GLRenderState& renderState) const
{
/* Push the transformation onto the matrix stack: */
OGTransform previousTransform=renderState.pushTransform(transform);
/* Call the render actions of all children in order: */
for(MFGraphNode::ValueList::const_iterator chIt=children.getValues().begin();chIt!=children.getValues().end();++chIt)
(*chIt)->glRenderAction(renderState);
/* Pop the transformation off the matrix stack: */
renderState.popTransform(previousTransform);
}
void VariableManager::beginRenderPass(GLRenderState& renderState) const
{
/* Get the context data item: */
DataItem* dataItem=renderState.getContextData().retrieveDataItem<DataItem>(this);
/* Initialize the scalar variable tracker: */
dataItem->lastBoundScalarVariableIndex=-1;
/* Save the OpenGL texture matrix: */
renderState.setMatrixMode(2);
glPushMatrix();
dataItem->textureMatrixVersion=renderState.getMatrixVersion();
}
void LODSphereNode::glRenderAction(GLRenderState& renderState) const
{
Scalar current_ratio = Geometry::sqrDist(renderState.getViewerPos(), Point::origin) / radius.getValue();
renderState.enableCulling(GL_BACK);
if (detail.getNumValues() == 1) {
spheres.front()->glRenderAction(renderState.contextData);
} else {
std::vector<LODSphereNodeDisplayList*>::const_reverse_iterator sphere = spheres.rbegin();
MFFloat::ValueList::const_reverse_iterator ratio = lodRatio.getValues().rbegin();
while (sphere != spheres.rend() && ratio != lodRatio.getValues().rend()) {
if (current_ratio < *ratio) break;
++sphere; ++ratio;
}
(*sphere)->glRenderAction(renderState.contextData);
}
}
void ConeNode::glRenderAction(GLRenderState& renderState) const
{
/* Set up OpenGL state: */
renderState.enableCulling(GL_BACK);
/* Render the display list: */
DisplayList::glRenderAction(renderState.contextData);
}
void QuadSetNode::glRenderAction(GLRenderState& renderState) const
{
/* Bail out if there are less than 4 points: */
if(coord.getValue()==0||coord.getValue()->point.getNumValues()<4)
return;
/* Set up OpenGL state: */
renderState.enableCulling(GL_BACK);
/* Render the quad set: */
size_t numPoints=coord.getValue()->point.getNumValues();
glBegin(GL_QUADS);
std::vector<Vector>::const_iterator qnIt=quadNormals.begin();
for(size_t q=0;q+4<=numPoints;q+=4,++qnIt)
{
/* Get the quad's four corner points in counter-clockwise order: */
Point ps[4];
if(ccw.getValue())
{
for(size_t i=0;i<4;++i)
ps[i]=coord.getValue()->point.getValue(q+i);
}
else
{
for(size_t i=0;i<4;++i)
ps[i]=coord.getValue()->point.getValue(q+3-i);
}
if(pointTransform.getValue()!=0)
{
/* Transform the quad's corner points: */
for(int i=0;i<4;++i)
ps[i]=pointTransform.getValue()->transformPoint(ps[i]);
}
/* Draw the quad's front: */
glNormal(*qnIt);
for(int i=0;i<4;++i)
{
glTexCoord(quadTexCoords[i]);
glVertex(ps[i]);
}
if(!solid.getValue())
{
/* Draw the quad's back: */
glNormal(-*qnIt);
for(int i=3;i>=0;--i)
{
glTexCoord(quadTexCoords[i]);
glVertex(ps[i]);
}
}
}
glEnd();
}
void MaterialNode::setGLState(GLRenderState& renderState) const
{
/* Enable material rendering: */
renderState.enableMaterials();
/* Set the material properties: */
glMaterial(GLMaterialEnums::FRONT_AND_BACK,material);
renderState.emissiveColor=material.emission;
glColor(material.diffuse);
}
void ShapeNode::glRenderAction(GLRenderState& renderState) const
{
/* Set the attribute node's OpenGL state: */
if(appearance.getValue()!=0)
appearance.getValue()->setGLState(renderState);
else
{
/* Turn off all appearance aspects: */
renderState.disableMaterials();
renderState.emissiveColor=GLRenderState::Color(1.0f,1.0f,1.0f);
renderState.disableTextures();
}
/* Render the geometry node: */
if(geometry.getValue()!=0)
geometry.getValue()->glRenderAction(renderState);
/* Reset the attribute node's OpenGL state: */
if(appearance.getValue()!=0)
appearance.getValue()->resetGLState(renderState);
}
void VariableManager::bindColorMap(int scalarVariableIndex,GLRenderState& renderState) const
{
/* Get the context data item: */
DataItem* dataItem=renderState.getContextData().retrieveDataItem<DataItem>(this);
/* Set up 1D texture mapping: */
renderState.setTextureLevel(1);
/* Bind the color texture object: */
renderState.bindTexture(dataItem->colorMapTextureIds[scalarVariableIndex]);
/* Check if the texture object is outdated: */
const ScalarVariable& sv=scalarVariables[scalarVariableIndex];
if(dataItem->colorMapVersions[scalarVariableIndex]!=sv.colorMapVersion)
{
/* Set the texture object's parameters: */
glTexParameteri(GL_TEXTURE_1D,GL_TEXTURE_BASE_LEVEL,0);
glTexParameteri(GL_TEXTURE_1D,GL_TEXTURE_MAX_LEVEL,0);
glTexParameteri(GL_TEXTURE_1D,GL_TEXTURE_WRAP_S,GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_1D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
glTexParameteri(GL_TEXTURE_1D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
/* Upload the changed color map into the texture object: */
glPixelStorei(GL_UNPACK_SKIP_PIXELS,0);
glPixelStorei(GL_UNPACK_ALIGNMENT,1);
glTexImage1D(GL_TEXTURE_1D,0,GL_RGBA8,256,0,GL_RGBA,GL_FLOAT,sv.colorMap->getColors());
/* Mark the texture object as up-to-date: */
dataItem->colorMapVersions[scalarVariableIndex]=sv.colorMapVersion;
}
/* Set up the texture matrix to convert scalar variable values to color map indices: */
renderState.setMatrixMode(2);
if(dataItem->lastBoundScalarVariableIndex!=scalarVariableIndex||dataItem->textureMatrixVersion!=renderState.getMatrixVersion())
{
glLoadIdentity();
double mapMin=double(sv.colorMapRange.first);
double mapRange=double(sv.colorMapRange.second)-mapMin;
glScaled(1.0/mapRange,1.0,1.0);
glTranslated(-mapMin,0.0,0.0);
renderState.updateMatrix();
/* Mark the texture matrix as up to date: */
dataItem->lastBoundScalarVariableIndex=scalarVariableIndex;
dataItem->textureMatrixVersion=renderState.getMatrixVersion();
}
}
void VectorEvaluationLocator::highlightLocator(GLRenderState& renderState) const
{
/* Call the base class method: */
EvaluationLocator::highlightLocator(renderState);
/* Render the evaluated vector value if valid: */
if(valueValid)
{
/* Set up OpenGL state for arrow rendering: */
renderState.enableCulling(GL_BACK);
renderState.setLighting(true);
renderState.setTwoSidedLighting(false);
glColor((*colorMap)(currentScalarValue));
renderState.enableColorMaterial(GL_FRONT_AND_BACK,GL_AMBIENT_AND_DIFFUSE);
renderState.setTextureLevel(0);
renderState.setSeparateSpecularColor(false);
/* Render an arrow glyph: */
Scalar arrowShaftRadius=Scalar((Vrui::Scalar(0.5)*Vrui::getUiSize())/Vrui::getNavigationTransformation().getScaling());
Visualization::Wrappers::renderArrow(point,currentValue*arrowLengthScale,arrowShaftRadius,arrowShaftRadius*Scalar(3),arrowShaftRadius*Scalar(6),16);
}
}
void QuadSetNode::glRenderAction(GLRenderState& renderState) const
{
/* Bail out if there are no complete quads: */
if(numQuads==0)
return;
/* Set up OpenGL state: */
if(solid.getValue())
renderState.enableCulling(GL_BACK);
else
renderState.disableCulling();
/* Get the context data item: */
DataItem* dataItem=renderState.contextData.retrieveDataItem<DataItem>(this);
if(dataItem->vertexBufferObjectId!=0&&dataItem->indexBufferObjectId!=0)
{
typedef GLGeometry::Vertex<Scalar,2,void,0,Scalar,Scalar,3> Vertex; // Type for vertices
typedef GLuint Index; // Type for vertex indices
/* Bind the quad set's vertex and index buffer objects: */
glBindBufferARB(GL_ARRAY_BUFFER_ARB,dataItem->vertexBufferObjectId);
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB,dataItem->indexBufferObjectId);
/* Check if the vertex or index buffers are outdated: */
if(dataItem->version!=version)
{
/* Upload the quad set's new vertices: */
uploadQuads(dataItem);
dataItem->version=version;
}
/* Set up the vertex arrays: */
GLVertexArrayParts::enable(Vertex::getPartsMask());
glVertexPointer(static_cast<Vertex*>(0));
/* Render the quad set: */
if(subdivideX.getValue()>1||subdivideY.getValue()>1)
{
/* Draw a set of quad strips: */
const Index* indexPtr=0;
for(unsigned int strip=0;strip<numQuads*subdivideY.getValue();++strip,indexPtr+=(subdivideX.getValue()+1)*2)
glDrawElements(GL_QUAD_STRIP,(subdivideX.getValue()+1)*2,GL_UNSIGNED_INT,indexPtr);
}
else
{
/* Draw all quads in one go: */
glDrawArrays(GL_QUADS,0,numQuads*4);
}
/* Reset the vertex arrays: */
GLVertexArrayParts::disable(Vertex::getPartsMask());
/* Protect the buffers: */
glBindBufferARB(GL_ARRAY_BUFFER_ARB,0);
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB,0);
}
else
{
/* If your OpenGL can't do vertex buffers, you're f****d anyway. */
}
}