// find links in a "context"
void EntityLinkDecorator::gatherLinks(Vec4f::List& vListLocal, Vec4f::List& vListContext, RenderContext& context, Model::Entity& curEnt, Model::EntitySet& visitedEntities) {
Model::EntitySet::iterator vIt = visitedEntities.lower_bound(&curEnt);
if (*vIt == &curEnt)
return;
visitedEntities.insert(vIt, &curEnt);
if (!context.filter().entityVisible(curEnt))
return;
Model::EntityList::const_iterator it, end;
const Model::EntityList& targetList = curEnt.linkTargets();
for (it = targetList.begin(), end = targetList.end(); it != end; ++it) {
Model::Entity& targetEnt = **it;
if (!context.filter().entityVisible(targetEnt))
continue;
if (curEnt.selected() || targetEnt.selected())
addArrowVerts(vListLocal, curEnt.center(), targetEnt.center());
else
addArrowVerts(vListContext, curEnt.center(), targetEnt.center());
gatherLinks(vListLocal, vListContext, context, targetEnt, visitedEntities);
}
const Model::EntityList& sourceList = curEnt.linkSources();
for (it = sourceList.begin(), end = sourceList.end(); it != end; ++it) {
Model::Entity& sourceEnt = **it;
if (!context.filter().entityVisible(sourceEnt))
continue;
gatherLinks(vListLocal, vListContext, context, sourceEnt, visitedEntities);
}
}
void EntityLinkDecorator::render(Vbo& vbo, RenderContext& context) {
if (context.viewOptions().linkDisplayMode() == View::ViewOptions::LinkDisplayNone)
return;
const Model::EntityList& entities = map().entities();
if (entities.empty())
return;
SetVboState activateVbo(vbo, Vbo::VboActive);
if (m_doRebuild) {
delete m_vertexArray;
m_vertexArray = NULL;
m_doRebuild = false;
// for keeping track of which entities have already been visited by the link-gathering algorithm - should this be part of each entity instead ?
Model::EntitySet visitedEntities;
Vec4f::List vertsLocal; // links directly connected to a selected entity
Vec4f::List vertsContext; // links not directly connected, but in the same context
Vec4f::List vertsUnrelated; // links not related to the current selection
Model::EntityList::const_iterator it, end;
// first pass, outputs local or local+context links
for (it = entities.begin(), end = entities.end(); it != end; ++it) {
Model::Entity& entity = **it;
if (entity.selected()) {
if (context.viewOptions().linkDisplayMode() == View::ViewOptions::LinkDisplayLocal) {
gatherLinksLocal(vertsLocal, context, entity);
} else {
gatherLinks(vertsLocal, vertsContext, context, entity, visitedEntities);
}
}
}
// second pass, only used in "display all" mode, outputs target links of entities the first pass didn't visit
if (context.viewOptions().linkDisplayMode() == View::ViewOptions::LinkDisplayAll) {
Model::EntitySet::const_iterator vIt;
for (it = entities.begin(), end = entities.end(); it != end; ++it) {
Model::Entity& entity = **it;
vIt = visitedEntities.lower_bound( &entity );
if( *vIt != &entity )
gatherLinksUnrelated(vertsUnrelated, context, entity);
}
}
unsigned int vertexCount = static_cast<unsigned int>(vertsLocal.size() + vertsContext.size() + vertsUnrelated.size());
if (vertexCount == 0)
return;
//FIXME : doesn't need to be a color4f at the moment
m_vertexArray = new VertexArray(vbo, GL_LINES, vertexCount, Attribute::position3f(), Attribute::color4f(), 0);
SetVboState mapVbo(vbo, Vbo::VboMapped);
// draw order : unrelated -> context -> local
// vertData.y sets the type of link for the shader ( 0 = unrelated, 0.5 = context, 1.0 = local )
Vec4f vertData(1.0f);
vertData.y = 0.0f;
for (int i = 0; i != vertsUnrelated.size(); ++i ) {
vertData.x = vertsUnrelated[i].w;
m_vertexArray->addAttribute(Vec3f(vertsUnrelated[i].x, vertsUnrelated[i].y, vertsUnrelated[i].z));
m_vertexArray->addAttribute(vertData);
}
vertData.y = 0.5f;
for (int i = 0; i != vertsContext.size(); ++i) {
vertData.x = vertsContext[i].w;
m_vertexArray->addAttribute(Vec3f(vertsContext[i].x, vertsContext[i].y, vertsContext[i].z));
m_vertexArray->addAttribute(vertData);
}
vertData.y = 1.0f;
for (int i = 0; i != vertsLocal.size(); ++i) {
vertData.x = vertsLocal[i].w;
m_vertexArray->addAttribute(Vec3f(vertsLocal[i].x, vertsLocal[i].y, vertsLocal[i].z));
m_vertexArray->addAttribute(vertData);
}
m_valid = true;
}
if (!m_valid || m_vertexArray == NULL)
return;
ActivateShader shader(context.shaderManager(), Shaders::EntityLinkShader );
shader.currentShader().setUniformVariable("CameraPosition", context.camera().position());
//shader.currentShader().setUniformVariable("Color", m_color); // unused at the moment, make color view-prefs for the different types of links ?
shader.currentShader().setUniformVariable("Occluded", 1.0f);
// render the "occluded" portion without depth-test
glLineWidth(2.0f);
glDepthMask(GL_FALSE);
glDisable(GL_DEPTH_TEST);
m_vertexArray->render();
shader.currentShader().setUniformVariable("Occluded", 0.0f);
glEnable(GL_DEPTH_TEST);
m_vertexArray->render();
glDepthMask(GL_TRUE);
glLineWidth(1.0f);
}