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;
}
void OSPObjectFile::importLightAttribute(const tinyxml2::XMLNode *node, OSPLight light) {
//! Light color.
if (!strcmp(node->ToElement()->Name(), "color")) return(importAttributeFloat3(node, light));
//! Light direction.
if (!strcmp(node->ToElement()->Name(), "direction")) return(importAttributeFloat3(node, light));
//! Light half angle for spot lights.
if (!strcmp(node->ToElement()->Name(), "halfAngle")) return(importAttributeFloat(node, light));
//! Light position.
if (!strcmp(node->ToElement()->Name(), "position")) return(importAttributeFloat3(node, light));
//! Light illumination distance cutoff.
if (!strcmp(node->ToElement()->Name(), "range")) return(importAttributeFloat(node, light));
//! Error check.
exitOnCondition(true, "unrecognized XML element type '" + std::string(node->ToElement()->Name()) + "'");
}
void OSPObjectFile::importVolumeAttribute(const tinyxml2::XMLNode *node, OSPVolume volume) {
//! Volume size in voxels per dimension.
if (!strcmp(node->ToElement()->Name(), "dimensions")) return(importAttributeInteger3(node, volume));
//! File containing a volume specification and / or voxel data.
if (!strcmp(node->ToElement()->Name(), "filename")) return(importVolumeFile(node, volume));
//! Gamma correction coefficient and exponent.
if (!strcmp(node->ToElement()->Name(), "gammaCorrection")) return(importAttributeFloat2(node, volume));
//! Sampling rate for ray casting based renderers.
if (!strcmp(node->ToElement()->Name(), "samplingRate")) return(importAttributeFloat(node, volume));
//! Subvolume offset from origin within the full volume.
if (!strcmp(node->ToElement()->Name(), "subvolumeOffsets")) return(importAttributeInteger3(node, volume));
//! Subvolume dimensions within the full volume.
if (!strcmp(node->ToElement()->Name(), "subvolumeDimensions")) return(importAttributeInteger3(node, volume));
//! Subvolume steps in each dimension; can be used to subsample the volume.
if (!strcmp(node->ToElement()->Name(), "subvolumeSteps")) return(importAttributeInteger3(node, volume));
//! Voxel value range.
if (!strcmp(node->ToElement()->Name(), "voxelRange")) return(importAttributeFloat2(node, volume));
//! Voxel spacing in world coordinates (currently unused).
if (!strcmp(node->ToElement()->Name(), "voxelSpacing")) return(importAttributeFloat3(node, volume));
//! Voxel type string.
if (!strcmp(node->ToElement()->Name(), "voxelType")) return(importAttributeString(node, volume));
//! Error check.
exitOnCondition(true, "unrecognized XML element type '" + std::string(node->ToElement()->Name()) + "'");
}
OSPVolume OSPObjectFile::importVolume(const tinyxml2::XMLNode *root)
{
const char *dpFromEnv = getenv("OSPRAY_DATA_PARALLEL");
OSPVolume volume = NULL;
if (dpFromEnv) {
// Create the OSPRay object.
osp::vec3i blockDims;
int rc = sscanf(dpFromEnv,"%dx%dx%d",&blockDims.x,&blockDims.y,&blockDims.z);
if (rc !=3)
throw std::runtime_error("could not parse OSPRAY_DATA_PARALLEL env-var. Must be of format <X>x<Y>x<>Z (e.g., '4x4x4'");
volume = ospNewVolume("data_distributed_volume");
if (volume == NULL)
throw std::runtime_error("#loaders.ospObjectFile: could not create volume ...");
ospSetVec3i(volume,"num_dp_blocks",blockDims);
} else {
// Create the OSPRay object.
volume = ospNewVolume("block_bricked_volume");
}
if (volume == NULL)
throw std::runtime_error("#loaders.ospObjectFile: could not create volume ...");
// Temporary storage for the file name attribute if specified.
const char *volumeFilename = NULL;
// Iterate over object attributes.
for (const tinyxml2::XMLNode *node = root->FirstChild() ; node ; node = node->NextSibling()) {
// Volume size in voxels per dimension.
if (!strcmp(node->ToElement()->Name(), "dimensions")) { importAttributeInteger3(node, volume); continue; }
// File containing a volume specification and / or voxel data.
if (!strcmp(node->ToElement()->Name(), "filename")) { volumeFilename = node->ToElement()->GetText(); continue; }
// Grid origin in world coordinates.
if (!strcmp(node->ToElement()->Name(), "gridOrigin")) { importAttributeFloat3(node, volume); continue; }
// Grid spacing in each dimension in world coordinates.
if (!strcmp(node->ToElement()->Name(), "gridSpacing")) { importAttributeFloat3(node, volume); continue; }
// Sampling rate for ray casting based renderers.
if (!strcmp(node->ToElement()->Name(), "samplingRate")) { importAttributeFloat(node, volume); continue; }
// Subvolume offset from origin within the full volume.
if (!strcmp(node->ToElement()->Name(), "subvolumeOffsets")) { importAttributeInteger3(node, volume); continue; }
// Subvolume dimensions within the full volume.
if (!strcmp(node->ToElement()->Name(), "subvolumeDimensions")) { importAttributeInteger3(node, volume); continue; }
// Subvolume steps in each dimension; can be used to subsample the volume.
if (!strcmp(node->ToElement()->Name(), "subvolumeSteps")) { importAttributeInteger3(node, volume); continue; }
// Voxel value range.
if (!strcmp(node->ToElement()->Name(), "voxelRange")) { importAttributeFloat2(node, volume); continue; }
// Voxel type string.
if (!strcmp(node->ToElement()->Name(), "voxelType")) { importAttributeString(node, volume); continue; }
// Error check.
exitOnCondition(true, "unrecognized XML element type '" + std::string(node->ToElement()->Name()) + "'");
}
// Load the contents of the volume file if specified.
if (volumeFilename != NULL) {
// Some implementations of 'dirname()' are destructive.
char *duplicateFilename = strdup(filename.c_str());
// The volume file path is absolute.
if (volumeFilename[0] == '/')
return(VolumeFile::importVolume(volumeFilename, volume));
// The volume file path is relative to the object file path.
if (volumeFilename[0] != '/')
return(VolumeFile::importVolume((std::string(dirname(duplicateFilename)) + "/" + volumeFilename).c_str(), volume));
// Free the temporary character array.
if (duplicateFilename != NULL) free(duplicateFilename);
}
// The populated volume object.
return volume;
}
