void OptiXRenderer::convertToOptiXScene(optix::Context context, int width, int height, float film_location) {
// Setup lighting
// TODO For now, we assume just one light
context->setEntryPointCount( 1 );
context->setRayGenerationProgram( 0, mScene->mLights[0]->getOptiXLight(context) );
// Exception program
context->setExceptionProgram( 0, context->createProgramFromPTXFile( "ptx/PhotonTracer.ptx", "exception" ) );
// Miss program
context->setMissProgram( 0, context->createProgramFromPTXFile( "ptx/PhotonTracer.ptx", "miss" ) );
// Geometry group
optix::GeometryGroup geometrygroup = context->createGeometryGroup();
geometrygroup->setChildCount( mScene->mObjects.size() + 1 );
geometrygroup->setAcceleration( context->createAcceleration("Bvh","Bvh") );
// Add objects
for(std::vector<RenderObject*>::size_type i = 0; i != mScene->mObjects.size(); i++) {
optix::GeometryInstance gi = context->createGeometryInstance();
// TODO we only support 1 material type per object
gi->setMaterialCount(1);
gi->setGeometry( mScene->mObjects[i]->getOptiXGeometry(context));
gi->setMaterial(0, mScene->mObjects[i]->getOptiXMaterial(context));
geometrygroup->setChild(i, gi);
}
// Create Camera
//
mCameraMat = new CameraMaterial(width, height, 1);
PlaneObject* plane = new PlaneObject(mCameraMat);
plane->setPosition(0, 0, film_location); //-65
mCameraObject = plane;
// Convert to OptiX
optix::GeometryInstance gi = context->createGeometryInstance();
gi->setMaterialCount(1);
gi->setGeometry( mCameraObject->getOptiXGeometry(context));
mCameraMatOptiX = mCameraObject->getOptiXMaterial(context);
mCameraMatOptiX["width"]->setInt(width);
mCameraMatOptiX["height"]->setInt(height);
gi->setMaterial(0, mCameraMatOptiX);
geometrygroup->setChild(mScene->mObjects.size(), gi);
context["top_object"]->set(geometrygroup);
}
optix::GeometryInstance PolygonMesh::makeGeometry( optix::Context &m_context, optix::Material material ) {
if (!initialised) {
throw runtime_error("mesh programs not initialised");
}
optix::GeometryGroup model_group = m_context->createGeometryGroup();
ObjLoader objloader0(model.filepath.c_str(), m_context, model_group, material);
objloader0.setBboxProgram(bounding_box);
objloader0.setIntersectProgram(intersection);
objloader0.load(model.transform);
model.tr = m_context->createTransform();
model.tr->setChild(model_group);
setPosition(model.tr, model.position, model_rot);
optix::GeometryInstance gi = model_group->getChild(0);
setMaterial(gi, material, "diffuse_color", model.colour);
return gi;
}
void Object::optixInit(optix::Context context) {
try {
// Make geometry group
Optix.geometryGroup = context->createGeometryGroup();
Optix.geometryGroup->setAcceleration(context->createAcceleration(OPTIX_GEOMETRY_BUILDER, OPTIX_GEOMETRY_TRAVERSER)); // TODO: Look into different traversers/builders
// Add geometries
for (uint i = 0; i < geometries.size(); i++) {
geometries[i]->optixInit(context);
Optix.geometryGroup->addChild(((TriangleMesh*)geometries[i])->Optix.geometryInstance);
}
// Make transform
Optix.transform = context->createTransform();
Optix.transform->setChild(Optix.geometryGroup);
Optix.transform->setMatrix(true, matrix.e, NULL);
} catch (optix::Exception e) {
printException(e);
}
}
optix::Group CornellSmall::getSceneRootGroup(optix::Context & context)
{
m_pgram_bounding_box = context->createProgramFromPTXFile( "parallelogram.cu.ptx", "bounds" );
m_pgram_intersection = context->createProgramFromPTXFile( "parallelogram.cu.ptx", "intersect" );
// create geometry instances
QVector<optix::GeometryInstance> gis;
Diffuse diffuseWhite = Diffuse(optix::make_float3( 0.8f ));
Diffuse diffuseGreen = Diffuse(optix::make_float3( 0.05f, 0.8f, 0.05f ));
Diffuse diffuseRed = Diffuse(optix::make_float3( 1.f, 0.05f, 0.05f ));
// colors as in SmallVCM
if ((m_config & CornellSmall::SmallVCMColors) != 0)
{
diffuseWhite = Diffuse(optix::make_float3( 0.803922f, 0.803922f, 0.803922f ));
diffuseGreen = Diffuse(optix::make_float3( 0.156863f, 0.803922f, 0.172549f ));
diffuseRed = Diffuse(optix::make_float3( 0.803922f, 0.152941f, 0.152941f ));
}
Diffuse diffuseBlue = Diffuse(optix::make_float3( 0.156863f, 0.172549f, 0.803922f ));
Mirror mirror = Mirror(optix::make_float3(1.f,1.f,1.f));
Glossy glossyWhite = Glossy(optix::make_float3(.1f,.1f,.1f), optix::make_float3(.7f,.7f,.7f), 90.f);
Glass glass = Glass(1.6, optix::make_float3(1.f,1.f,1.f), optix::make_float3(1.f,1.f,1.f) );
DiffuseEmitter emitter = DiffuseEmitter(m_sceneLights[0].power, Vector3(1));
// Set up materials
// Floor
Material *matFloor = &diffuseWhite;
if ((m_config & Config::FloorMirror) != 0)
{
matFloor = &mirror;
}
else if ((m_config & Config::FloorGlossy) != 0)
{
matFloor = &glossyWhite;
}
// Ceiling
Material *matCeiling = &diffuseWhite;
// Back wall
Material *matBackWall = &diffuseWhite;
if ((m_config & Config::BackwallBlue) != 0)
{
matBackWall = &diffuseBlue;
}
// Right wall
Material *matRightWall = &diffuseGreen;
if ((m_config & CornellSmall::SmallVCMColors) != 0)
matRightWall = &diffuseRed;
// Left wall
Material *matLeftWall = &diffuseRed;
if ((m_config & CornellSmall::SmallVCMColors) != 0)
matLeftWall = &diffuseGreen;
// Short block
Material *matShortBlock = &diffuseWhite;
// Tall block
Material *matTallBlock = &diffuseWhite;
// Set geometry - Cornell box size in SmallVCM 2.56004, here rounded up slightly
// Floor
gis.push_back( createParallelogram(0, context, optix::make_float3( 0.0f, 0.0f, 0.0f ),
optix::make_float3( 0.0f, 0.0f, 2.5f ),
optix::make_float3( 2.5f, 0.0f, 0.0f ),
*matFloor ) );
// Ceiling
if ((m_config & Config::LightPointDistant) == 0)
{
gis.push_back( createParallelogram(1, context, optix::make_float3( 0.0f, 2.5f, 0.0f ),
optix::make_float3( 2.5f, 0.0f, 0.0f ),
optix::make_float3( 0.0f, 0.0f, 2.5f ),
*matCeiling ) );
}
// Back wall
gis.push_back( createParallelogram(2, context,optix::make_float3( 0.0f, 0.0f, 2.5f),
optix::make_float3( 0.0f, 2.5f, 0.0f),
optix::make_float3( 2.5f, 0.0f, 0.0f),
*matBackWall));
// Right wall
gis.push_back( createParallelogram(3, context, optix::make_float3( 0.0f, 0.0f, 0.0f ),
optix::make_float3( 0.0f, 2.5f, 0.0f ),
optix::make_float3( 0.0f, 0.0f, 2.5f ),
*matRightWall ) );
// Left wall
gis.push_back( createParallelogram(4, context, optix::make_float3( 2.5f, 0.0f, 0.0f ),
optix::make_float3( 0.0f, 0.0f, 2.5f ),
optix::make_float3( 0.0f, 2.5f, 0.0f ),
*matLeftWall ) );
if ((m_config & Config::Blocks) != 0)
{
// Short block
gis.push_back( createParallelogram(5, context,
optix::make_float3( 130.0f, 165.0f, 65.0f) / 220.f,
optix::make_float3( -48.0f, 0.0f, 160.0f) / 220.f,
optix::make_float3( 160.0f, 0.0f, 49.0f) / 220.f,
*matShortBlock ) );
gis.push_back( createParallelogram(6, context,
optix::make_float3( 290.0f, 0.0f, 114.0f) / 220.f,
optix::make_float3( 0.0f, 165.0f, 0.0f) / 220.f,
optix::make_float3( -50.0f, 0.0f, 158.0f) / 220.f,
*matShortBlock ) );
gis.push_back( createParallelogram(7, context,
optix::make_float3( 130.0f, 0.0f, 65.0f) / 220.f,
optix::make_float3( 0.0f, 165.0f, 0.0f) / 220.f,
optix::make_float3( 160.0f, 0.0f, 49.0f) / 220.f,
*matShortBlock ) );
gis.push_back( createParallelogram(8, context,
optix::make_float3( 82.0f, 0.0f, 225.0f) / 220.f,
optix::make_float3( 0.0f, 165.0f, 0.0f) / 220.f,
optix::make_float3( 48.0f, 0.0f, -160.0f) / 220.f,
*matShortBlock ) );
gis.push_back( createParallelogram(9, context,
optix::make_float3( 240.0f, 0.0f, 272.0f) / 220.f,
optix::make_float3( 0.0f, 165.0f, 0.0f) / 220.f,
optix::make_float3( -158.0f, 0.0f, -47.0f) / 220.f,
*matShortBlock));
// Tall block
gis.push_back( createParallelogram(10, context,
optix::make_float3( 423.0f, 340.0f, 247.0f) / 220.f,
optix::make_float3( -158.0f, 0.0f, 49.0f) / 220.f,
optix::make_float3( 49.0f, 0.0f, 159.0f) / 220.f,
*matTallBlock ) );
gis.push_back( createParallelogram(11, context,
optix::make_float3( 423.0f, 0.0f, 247.0f) / 220.f,
optix::make_float3( 0.0f, 340.0f, 0.0f) / 220.f,
optix::make_float3( 49.0f, 0.0f, 159.0f) / 220.f,
*matTallBlock ) );
gis.push_back( createParallelogram(12, context,
optix::make_float3( 472.0f, 0.0f, 406.0f) / 220.f,
optix::make_float3( 0.0f, 340.0f, 0.0f) / 220.f,
optix::make_float3( -158.0f, 0.0f, 50.0f) / 220.f,
*matTallBlock ) );
gis.push_back( createParallelogram(13, context,
optix::make_float3( 314.0f, 0.0f, 456.0f) / 220.f,
optix::make_float3( 0.0f, 340.0f, 0.0f) / 220.f,
optix::make_float3( -49.0f, 0.0f, -160.0f) / 220.f,
*matTallBlock ) );
gis.push_back( createParallelogram(14, context,
optix::make_float3( 265.0f, 0.0f, 296.0f) / 220.f,
optix::make_float3( 0.0f, 340.1f, 0.0f) / 220.f,
optix::make_float3( 158.0f, 0.0f, -49.0f) / 220.f,
*matTallBlock ) );
}
// Area light
if ( ((m_config & Config::LightArea) != 0) ||
((m_config & Config::LightAreaUpwards) != 0) )
{
emitter.setInverseArea(m_sceneLights[0].inverseArea);
for(int i = 0; i < m_sceneLights.size(); i++)
{
gis.push_back(createParallelogram(15 + i, context, m_sceneLights[i].position,
m_sceneLights[i].v1, m_sceneLights[i].v2, emitter));
}
}
// Large sphere
if ((m_config & Config::LargeMirrorSphere) != 0 || (m_config & Config::LargeGlassSphere) != 0)
{
Material *matLargeSphere = &mirror;
if ((m_config & Config::LargeGlassSphere) != 0)
matLargeSphere = &glass;
float radius = 0.8;
SphereInstance sphere = SphereInstance(*matLargeSphere, Sphere(Vector3(1.25f, radius, 1.25f), radius));
gis.push_back(sphere.getOptixGeometryInstance(context));
}
// Small glass sphere right
if ((m_config & Config::SmallGlassSphere))
{
float radius = 0.5;
SphereInstance sphere = SphereInstance(glass, Sphere(Vector3(1.25f - 0.535714269f, radius, 1.25f), radius));
gis.push_back(sphere.getOptixGeometryInstance(context));
}
// Small mirror sphere left
if ((m_config & Config::SmallMirrorSphere))
{
float radius = 0.5;
SphereInstance sphere = SphereInstance(mirror, Sphere(Vector3(1.25f + 0.535714269f, radius, 1.25f), radius));
gis.push_back(sphere.getOptixGeometryInstance(context));
}
// Create geometry group
optix::GeometryGroup geometry_group = context->createGeometryGroup();
geometry_group->setChildCount( static_cast<unsigned int>( gis.size() ) );
for (int i = 0; i < gis.size(); ++i )
geometry_group->setChild( i, gis[i] );
geometry_group->setAcceleration(context->createAcceleration("NoAccel", "NoAccel")); // Bvh Sbvh Trbvh NoAccel // Bvh BvhCompact NoAccel
optix::Group gro = context->createGroup();
gro->setChildCount(1);
gro->setChild(0, geometry_group);
optix::Acceleration acceleration = context->createAcceleration("NoAccel", "NoAccel");
gro->setAcceleration(acceleration);
return gro;
}