void VolumeViewer::initObjects(const std::string &renderer_type)
{
// Create an OSPRay renderer.
renderer = ospNewRenderer(renderer_type.c_str());
exitOnCondition(renderer == NULL, "could not create OSPRay renderer object");
// Set renderer defaults (if not using 'aoX' renderers)
if (renderer_type[0] != 'a' && renderer_type[1] != 'o')
{
ospSet1i(renderer, "aoSamples", 1);
ospSet1i(renderer, "shadowsEnabled", 1);
}
// Create OSPRay ambient and directional lights. GUI elements will modify their parameters.
ambientLight = ospNewLight(renderer, "AmbientLight");
exitOnCondition(ambientLight == NULL, "could not create ambient light");
ospCommit(ambientLight);
directionalLight = ospNewLight(renderer, "DirectionalLight");
exitOnCondition(directionalLight == NULL, "could not create directional light");
ospCommit(directionalLight);
// Set the light sources on the renderer.
std::vector<OSPLight> lights;
lights.push_back(ambientLight);
lights.push_back(directionalLight);
ospSetData(renderer, "lights", ospNewData(lights.size(), OSP_OBJECT, &lights[0]));
// Create an OSPRay transfer function.
transferFunction = ospNewTransferFunction("piecewise_linear");
exitOnCondition(transferFunction == NULL, "could not create OSPRay transfer function object");
ospCommit(transferFunction);
// Load OSPRay objects from files.
for (size_t i=0 ; i < objectFileFilenames.size() ; i++)
importObjectsFromFile(objectFileFilenames[i]);
// Get the bounding box of all volumes of the first model.
if(modelStates.size() > 0 && modelStates[0].volumes.size() > 0) {
ospGetVec3f(modelStates[0].volumes[0], "boundingBoxMin", (osp::vec3f*)&boundingBox.lower);
ospGetVec3f(modelStates[0].volumes[0], "boundingBoxMax", (osp::vec3f*)&boundingBox.upper);
for (size_t i=1; i<modelStates[0].volumes.size(); i++) {
ospcommon::box3f volumeBoundingBox;
ospGetVec3f(modelStates[0].volumes[i], "boundingBoxMin", (osp::vec3f*)&volumeBoundingBox.lower);
ospGetVec3f(modelStates[0].volumes[i], "boundingBoxMax", (osp::vec3f*)&volumeBoundingBox.upper);
boundingBox.extend(volumeBoundingBox);
}
}
}
OSPLight OSPObjectFile::importLight(const tinyxml2::XMLNode *root)
{
// Create the OSPRay object.
OSPLight light = ospNewLight(NULL, root->ToElement()->Attribute("type"));
// Iterate over object attributes.
for (const tinyxml2::XMLNode *node = root->FirstChild() ; node ; node = node->NextSibling()) {
// Light color.
if (!strcmp(node->ToElement()->Name(), "color")) { importAttributeFloat3(node, light); continue; }
// Light direction.
if (!strcmp(node->ToElement()->Name(), "direction")) { importAttributeFloat3(node, light); continue; }
// Light half angle for spot lights.
if (!strcmp(node->ToElement()->Name(), "halfAngle")) { importAttributeFloat(node, light); continue; }
// Light position.
if (!strcmp(node->ToElement()->Name(), "position")) { importAttributeFloat3(node, light); continue; }
// Light illumination distance cutoff.
if (!strcmp(node->ToElement()->Name(), "range")) { importAttributeFloat(node, light); continue; }
// Error check.
exitOnCondition(true, "unrecognized XML element type '" + std::string(node->ToElement()->Name()) + "'");
}
// The populated light object.
return light;
}
OSPObjectCatalog OSPObjectFile::importLight(const tinyxml2::XMLNode *root) {
//! Create the OSPRay object.
OSPLight light = ospNewLight(NULL, root->ToElement()->Attribute("type"));
//! Iterate over object attributes.
for (const tinyxml2::XMLNode *node = root->FirstChild() ; node ; node = node->NextSibling()) importLightAttribute(node, light);
//! Catalog the object attributes to allow introspection by the application.
return(new ObjectCatalog(root->ToElement()->Attribute("name"), (ManagedObject *) light));
}
