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Kalina

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    Kalina

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  1. OpenVDB Hello World

    Updating from Houdini 16.0.504.20 to 16.0.577 fixed the issue.
  2. OpenVDB Hello World

    OK, I'll try downgrading from 4.9.3
  3. OpenVDB Hello World

    Thanks, but that didn't help. The issue is still the same. A bit more info that may be relevant, though: I am on CentOS 6, which comes pre-packaged with gcc4.4. You may notice that my Makefile points to CXX=/share/apps/bin/gcc ...where I have gcc4.9.3, which I'm trying to use instead. Am I using the wrong gcc version, or pointing to it incorrectly?
  4. OpenVDB Hello World

    I'm using whatever came with Houdini16. Should I be using a different one?
  5. OpenVDB Hello World

    Here is the full problematic code: SOP_Testing.C: #include "SOP_Testing.h" #include <UT/UT_DSOVersion.h> #include <OP/OP_OperatorTable.h> #include <OP/OP_AutoLockInputs.h> using namespace AVL_Testing; PRM_Template SOP_Testing::myTemplateList[] = { PRM_Template() }; void newSopOperator(OP_OperatorTable *table) { OP_Operator *op; op = new OP_Operator("avl_testing", "Testing", SOP_Testing::myConstructor, SOP_Testing::myTemplateList, 0, 0, NULL, OP_FLAG_GENERATOR ); table->addOperator(op); } OP_Node* SOP_Testing::myConstructor(OP_Network *net, const char *name, OP_Operator *op) { return new SOP_Testing(net, name, op); } SOP_Testing::SOP_Testing(OP_Network *net, const char *name, OP_Operator *op): SOP_Node(net, name, op){} SOP_Testing::~SOP_Testing() {} OP_ERROR SOP_Testing::cookMySop(OP_Context &context) { openvdb::FloatGrid::Ptr grid = openvdb::FloatGrid::create(); openvdb::FloatGrid::Accessor accessor = grid->getAccessor(); openvdb::Coord xyz(5,5,5); accessor.setValue(xyz, 1.0); xyz.reset(0,0,0); accessor.setValue(xyz, 1.0); GU_PrimVDB::buildFromGrid((GU_Detail&)*gdp, grid, NULL, "gridName"); // Crashes on this line! // Complains about openvdb::v3_3_0_sesi::math::Transform::Transform(std::shared_ptr<openvdb::v3_3_0_sesi::math::MapBase> const&) return error(); } SOP_Testing.h: #ifndef __SOP_Testing_h__ #define __SOP_Testing_h__ #include <GU/GU_PrimVDB.h> #include <SOP/SOP_Node.h> namespace AVL_Testing { class SOP_Testing : public SOP_Node { public: static OP_Node *myConstructor(OP_Network*, const char *, OP_Operator *); static PRM_Template myTemplateList[]; protected: SOP_Testing(OP_Network *net, const char *name, OP_Operator *op); virtual ~SOP_Testing(); virtual OP_ERROR cookMySop(OP_Context &context); }; } #endif Makefile: CXX=/share/apps/bin/gcc HOU_VERSION = 16.0 DSONAME = SOP_Testing.so LOCATION = ~/houdini${HOU_VERSION}/dso/ SOURCES = SOP_Testing.C include $(HFS)/toolkit/makefiles/Makefile.gnu OPTIMIZER = -g HOUDINI_DSO_ERROR = 2 CPPFLAGS += -fPIC install: mkdir -p ${LOCATION} cp ${DSONAME} ${LOCATION}
  6. OpenVDB Hello World

    I just updated to Houdini16, and all of a sudden this same little code snippet doesn't work anymore. Houdini crashes on the line: GU_PrimVDB* vdb = GU_PrimVDB::buildFromGrid((GU_Detail&)*gdp, grid, NULL, "gridName"); ...with no log or helpful error message, just: undefined symbol: _ZN7openvdb11v3_3_0_sesi4math9TransformC1ERKSt10shared_ptrINS1_7MapBaseEE Deciphering that with c++filt shows that it's complaining about: openvdb::v3_3_0_sesi::math::Transform::Transform(std::shared_ptr<openvdb::v3_3_0_sesi::math::MapBase> const&) ...even though I'm not even using a transform. Any thoughts?
  7. Here is a simplification of my problem: I have two side-by-side volumes, and one of them has voxels that are twice the size of the other's. Or, another way of wording it – I have two volumes that are the same size, with resolutions e.g. 10x10x10 and 20x20x20. When I render the image, there is a seam between the two volumes. This seam is not there if the two volumes were have the same voxel size. How do I remove this seam? Is there something I can do in the shader? seam.hipnc
  8. Some more advanced questions that I have, if you're feeling especially helpful: * How do I render a VDB? * What is the difference between the "RenderMan (rib)" and "RenderMan RIS (ris)" out nodes?
  9. I would really appreciate help with doing the simplest possible volume render using RenderMan in Houdini. I always just get a black image. I think my issue is that I don't know how to set up a volume shader... A sample .hip file, or just telling me which nodes to use, would be very appreciated.
  10. How to write to VDB?

    Scripting in python, I can programmatically create a volume sop and then use setVoxel() or setAllVoxels() to fill in the voxels with data. ( http://archive.sidefx.com/docs/houdini15.0/hom/hou/Volume ) How can I do this with a VDB? I thought it should be somewhat similar, but there are no "set" functions I can call. ( http://archive.sidefx.com/docs/houdini15.0/hom/hou/VDB )
  11. OpenVDB Hello World

    Thank you, I got it working! openvdb::FloatGrid::Ptr grid = openvdb::FloatGrid::create(); openvdb::FloatGrid::Accessor accessor = grid->getAccessor(); openvdb::Coord xyz(5,5,5); accessor.setValue(xyz, 1.0); xyz.reset(0,0,0); accessor.setValue(xyz, 1.0); GU_PrimVDB* vdb = GU_PrimVDB::buildFromGrid((GU_Detail&)*gdp, grid, NULL, "gridName");
  12. OpenVDB Hello World

    Thanks, but that didn't get me very far. I now have: openvdb::GridBase::Ptr grid = openvdb::FloatGrid::create(); GEO_PrimVDB* vdb = GU_PrimVDB::buildFromGrid((GU_Detail&)gdp, grid, NULL, "gridName"); which segfaults and crashes: AP_Interface::coreDumpChaser(UTsignalHandlerArg) <libHoudiniUI.so> AP_Interface::si_CrashHandler::chaser(UTsignalHandlerArg) <libHoudiniUI.so> signalCallback(UTsignalHandlerArg) <libHoudiniUT.so> UT_Signal::UT_ComboSignalHandler::operator()(int, siginfo*, void*) const <libHoudiniUT.so> UT_Signal::processSignal(int, siginfo*, void*) <libHoudiniUT.so> [0xf70e] <libpthread.so.0> GA_PrimitiveFactory::lookupDefinition(GA_PrimitiveTypeId const&) const <libHoudiniGEO.so> GA_PrimitiveFactory::create(GA_PrimitiveTypeId const&, GA_Detail&, long) const <libHoudiniGEO.so> GEO_Detail::insertPrimitive(GA_PrimitiveTypeId const&, GEO_Primitive const*) <libHoudiniGEO.so> GU_PrimVDB::build(GU_Detail*, bool) <libHoudiniGEO.so> GU_PrimVDB::buildFromGridAdapter(GU_Detail&, void*, GEO_PrimVDB const*, char const*) <libHoudiniGEO.so>
  13. I'm trying to figure out how to create an OpenVDB volume by writing out the voxels, to make a custom SOP. The OpenVDB Hello World example goes something like this: // Initialize the OpenVDB library. This must be called at least // once per program and may safely be called multiple times. openvdb::initialize(); // Create an empty floating-point grid with background value 0. openvdb::FloatGrid::Ptr grid = openvdb::FloatGrid::create(); // Get an accessor for coordinate-based access to voxels. openvdb::FloatGrid::Accessor accessor = grid->getAccessor(); // Define a coordinate with signed indices. openvdb::Coord xyz(5, 5, 5); // Set the voxel value at (5, 5, 5) to 1. accessor.setValue(xyz, 1.0); But now how would I get this to work in Houdini in my "cookMySop()" function? How do I attach this grid to a GU_PrimVDB (or something) to actually create the OpenVDB primitive in Houdini? Could I get a Houdini-specific "Hello World" example?
  14. edward, thanks for the suggestion. I couldn't get valgrind working at first, but I just figured it out. I'll report back if I have more questions or relevant findings.
  15. Thanks, will do.
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