Rocky runs but cannot see any earth.

[trinhtuanlong]

So I just built rocky on my Ubuntu 22.04 using vcpkg. I tried running rocky_demo but only the menu window appears but nothing else. The terminal prints out these line: [rocky info] PROJ says: proj_create_from_wkt: missing [ [rocky info] PROJ says: proj_create_from_wkt: missing [ [rocky info] PROJ says: proj_create_from_wkt: missing [ [rocky info] PROJ says: proj_create_from_wkt: missing [ [rocky info] PROJ says: proj_create_from_wkt: whitespace only string [vsg info] texel_margin = 12 [vsg info] quad_margin = 6 [vsg info] [Vulkan] vkCreateDevice layer callstack setup to: [vsg info] [Vulkan] [vsg info] [Vulkan] || [vsg info] [Vulkan] [vsg info] [Vulkan] || [vsg info] [Vulkan] [vsg info] [Vulkan] Using "NVIDIA T1000" with driver: "libGLX_nvidia.so.0" ASSERTION FAILURE (getAllKeysAtLOD @ Profile.cpp:241) profile.valid() ... [rocky info] Removing window... [rocky info] All windows closed... shutting down.

What could be the problem?

[gwaldron]

Great question :) Please run rocky_demo --version-all and post the output.

Also, I would like to see your Version.h file that was created and installed in the rocky include folder.

You can also try a map with local data, in case there's a networking problem: rocky_demo --map data/geotiff.map.json

[trinhtuanlong]

So rocky_demo --version-all gives the output:

[rocky info] PROJ says: proj_create_from_wkt: missing [
[rocky info] PROJ says: proj_create_from_wkt: missing [
[rocky info] PROJ says: proj_create_from_wkt: missing [
[rocky info] PROJ says: proj_create_from_wkt: whitespace only string
[vsg info] texel_margin = 12
[vsg info] quad_margin = 6
cpp_httplib 0.18.0
entt 3.13.2
gdal 3.9.2
glm 1.0.1.0
imgui 1.91.0
nlohmann_json 3.11
openssl 3.3.2
proj 9.4
rocky 0.3.6
spdlog 1.14.1
sqlite 3.46.1
vsgxchange 1.0.5
vulkanscenegraph 1.1.8
weejobs 1.0.1
zlib 1.3.1```
The Version.h file is:
```/**
 * rocky c++
 * Copyright 2023 Pelican Mapping
 * MIT License
 */
#pragma once

// Do not edit me!
// CMake generated this file from "Version.h.in" - edit that instead.

#define ROCKY_PROJECT_NAME "rocky"
#define ROCKY_PROJECT_DESCRIPTION "Rocky by Pelican Mapping"

#define ROCKY_VERSION_MAJOR 0
#define ROCKY_VERSION_MINOR 3
#define ROCKY_VERSION_REV 6
#define ROCKY_VERSION_ABI 109
#define ROCKY_SOVERSION 109
#define ROCKY_STR_NX(s) #s
#define ROCKY_STR(s) ROCKY_STR_NX(s)
#define ROCKY_COMPUTE_VERSION(major, minor, rev) ((major) * 10000 + (minor) * 100 + (rev))
#define ROCKY_VERSION_NUMBER ROCKY_COMPUTE_VERSION(ROCKY_VERSION_MAJOR, ROCKY_VERSION_MINOR, ROCKY_VERSION_REV)
#define ROCKY_VERSION_STRING ROCKY_STR(ROCKY_VERSION_MAJOR) "." ROCKY_STR(ROCKY_VERSION_MINOR) "." ROCKY_STR(ROCKY_VERSION_REV)

#define ROCKY_VERSION_BEFORE(major, minor, rev) ROCKY_VERSION_NUMBER < ROCKY_COMPUTE_VERSION(major, minor, rev)
#define ROCKY_VERSION_AT_LEAST(major, minor, rev) ROCKY_VERSION_NUMBER >= ROCKY_COMPUTE_VERSION(major, minor, rev))

// Dependency defines

#define ROCKY_HAS_GLM
#define ROCKY_HAS_PROJ
#define ROCKY_HAS_SPDLOG
#define ROCKY_HAS_JSON
#define ROCKY_HAS_HTTPLIB
#define ROCKY_HAS_OPENSSL
#define ROCKY_HAS_GDAL
#define ROCKY_HAS_SQLITE
#define ROCKY_HAS_ZLIB
#define ROCKY_HAS_TMS
#define ROCKY_HAS_MBTILES
#define ROCKY_HAS_AZURE
#define ROCKY_HAS_BING
#define ROCKY_HAS_GEOCODER

#define ROCKY_HAS_VSG
#define ROCKY_HAS_VSGXCHANGE
#define ROCKY_HAS_ENTT
/* #undef ROCKY_HAS_GLSLANG */

rocky_demo --map data/geotiff.map.json gives the same problem.

[gwaldron]

Maybe you need to set your PROJ_DATA environment var to point at the PROJ share dir. If you installed from vcpkg it should be in you vcpkg installed folder, under share/proj

[trinhtuanlong]

I already did. echo $PROJ_DATA /home/longtt/.VSG/rocky/build/vcpkg_installed/x64-linux/share/proj I also already downloaded the PROJ-data repo on github to this folder.

[gwaldron]

Try pulling the latest rocky, and run it with the log level argument. Maybe this will reveal why PROJ is failing.

rocky_demo --log-level debug

[trinhtuanlong]

So I have rebuilt and run like you said and the messages are:

[rocky info] PROJ says: proj_create_from_wkt: missing [
[rocky info] PROJ says: proj_create_from_wkt: missing [
[rocky info] PROJ says: proj_create_from_wkt: missing [
[rocky info] PROJ says: proj_create_from_wkt: whitespace only string
[vsg info] texel_margin = 12
[vsg info] quad_margin = 6
[vsg info] [Vulkan] vkCreateDevice layer callstack setup to:
[vsg info] [Vulkan]    <Application>
[vsg info] [Vulkan]      ||
[vsg info] [Vulkan]    <Loader>
[vsg info] [Vulkan]      ||
[vsg info] [Vulkan]    <Device>
[vsg info] [Vulkan]        Using "NVIDIA T1000" with driver: "libGLX_nvidia.so.0"
[rocky debug] Layer "" profile set to {"extent":{"srs":"EPSG:4326+5773","xmax":180.0,"xmin":-180.0,"ymax":90.0,"ymin":-90.0},"tx":2,"ty":1}
[rocky debug] Layer "ReadyMap 15m Base Imagery" status = OK
[rocky debug] Layer "" profile set to {"extent":{"srs":"EPSG:4326+5773","xmax":180.0,"xmin":-180.0,"ymax":90.0,"ymin":-90.0},"tx":2,"ty":1}
[rocky debug] Layer "ReadyMap 90m Elevation" status = OK
ASSERTION FAILURE (getAllKeysAtLOD @ Profile.cpp:241) profile.valid() ...
[rocky info] Removing window...
[rocky info] All windows closed... shutting down.```

[gwaldron]

I'm not able to reproduce this on either Windows or WSL2 Ubuntu. The only course of action I can think of is to set a debugger breakpoint or examine the code and figure out why PROJ is getting an empty string. The function in question is here: https://github.com/pelicanmapping/rocky/blob/main/src/rocky/SRS.cpp#L129

[gwaldron]

Any luck with this?

[trinhtuanlong]

So I found that I have another version of proj on my computer, so I deleted it and tried to rebuild. Currently with latest rocky pull I have several error while building which may be related to the version of gcc I am using:

/home/longtt/.VSG/rocky/src/rocky/AzureImageLayer.cpp:111:27: error: ambiguous overload for ‘operator<<’ (operand types are ‘std::basic_ostream<char>’ and ‘const rocky::optional<unsigned int>’)
  111 |     query << "&tileSize=" << tileSize();
      |     ~~~~~~~~~~~~~~~~~~~~~ ^~ ~~~~~~~~~~
      |           |                          |
      |           std::basic_ostream<char>   const rocky::optional<unsigned int>

and

/home/longtt/.VSG/rocky/src/rocky/vsg/ECS.h: In constructor ‘rocky::ECS::SystemNode<T>::SystemNode(entt::registry&)’:
/home/longtt/.VSG/rocky/src/rocky/vsg/ECS.h:307:9: error: class ‘rocky::ECS::SystemNode<T>’ does not have any field named ‘Inherit’
  307 |         Inherit(), System(in_registry)
      |         ^~~~~~~

/home/longtt/.VSG/rocky/src/rocky/vsg/ECS.h: In instantiation of ‘rocky::ECS::SystemNode<T>::~SystemNode() [with T = rocky::Line]’:
/home/longtt/.VSG/release/include/vsg/core/Inherit.h:27:11:   required from here
/home/longtt/.VSG/rocky/src/rocky/vsg/ECS.h:316:46: error: invalid operands of types ‘<unresolved overloaded function type>’ and ‘void (rocky::ECS::SystemNode<rocky::Line>::*)(entt::registry&, entt::entity)’ {aka ‘void (rocky::ECS::SystemNode<rocky::Line>::*)(entt::basic_registry<>&, entt::entity)’} to binary ‘operator<’
  316 |         registry.on_construct<T>().disconnect<&SystemNode<T>::onConstruct>(*this);

May I ask which version of gcc and g++ are you using for rocky on Ubuntu?

[gwaldron]

Thanks. We develop on Windows with VS 2022, so sometimes the gcc compiler errors lag behind. On Linux we use Ubuntu 22.04. I just pushed an update that will hopefully fix your issues.

[trinhtuanlong]

Ok so I managed to build rocky, but rocky_demo debug throws these errors which seems unrelated to the previous issues

[vsg info] texel_margin = 12
[vsg info] quad_margin = 6
[vsg info] [Vulkan] Inserted device layer "VK_LAYER_KHRONOS_validation" (libVkLayer_khronos_validation.so)
[vsg info] [Vulkan] Failed to find vkGetDeviceProcAddr in layer "libVkLayer_MESA_device_select.so"
[vsg info] [Vulkan] vkCreateDevice layer callstack setup to:
[vsg info] [Vulkan]    <Application>
[vsg info] [Vulkan]      ||
[vsg info] [Vulkan]    <Loader>
[vsg info] [Vulkan]      ||
[vsg info] [Vulkan]    VK_LAYER_KHRONOS_validation
[vsg info] [Vulkan]            Type: Explicit
[vsg info] [Vulkan]            Manifest: /usr/share/vulkan/explicit_layer.d/VkLayer_khronos_validation.json
[vsg info] [Vulkan]            Library:  libVkLayer_khronos_validation.so
[vsg info] [Vulkan]      ||
[vsg info] [Vulkan]    <Device>
[vsg info] [Vulkan]        Using "NVIDIA T1000" with driver: "libGLX_nvidia.so.0"
[vsg error] [Vulkan] Validation Error: [ VUID-RuntimeSpirv-NonWritable-06341 ] Object 0: handle = 0x85798b0000000067, type = VK_OBJECT_TYPE_SHADER_MODULE; | MessageID = 0x116350f | vkCreateGraphicsPipelines(): pCreateInfos[0].pStages[0] SPIR-V (VK_SHADER_STAGE_VERTEX_BIT) uses descriptor [Set 1, Binding 1, variable "vsg_viewports"] (type VK_DESCRIPTOR_TYPE_STORAGE_BUFFER or VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC) which is not marked with NonWritable, but vertexPipelineStoresAndAtomics was not enabled.
The Vulkan spec states: If vertexPipelineStoresAndAtomics is not enabled, then all storage image, storage texel buffer, and storage buffer variables in the vertex, tessellation, and geometry stages must be decorated with the NonWritable decoration (https://vulkan.lunarg.com/doc/view/1.3.296.0/linux/1.3-extensions/vkspec.html#VUID-RuntimeSpirv-NonWritable-06341)
[rocky error] Validation Error: [ VUID-RuntimeSpirv-NonWritable-06341 ] Object 0: handle = 0x85798b0000000067, type = VK_OBJECT_TYPE_SHADER_MODULE; | MessageID = 0x116350f | vkCreateGraphicsPipelines(): pCreateInfos[0].pStages[0] SPIR-V (VK_SHADER_STAGE_VERTEX_BIT) uses descriptor [Set 1, Binding 1, variable "vsg_viewports"] (type VK_DESCRIPTOR_TYPE_STORAGE_BUFFER or VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC) which is not marked with NonWritable, but vertexPipelineStoresAndAtomics was not enabled.
The Vulkan spec states: If vertexPipelineStoresAndAtomics is not enabled, then all storage image, storage texel buffer, and storage buffer variables in the vertex, tessellation, and geometry stages must be decorated with the NonWritable decoration (https://vulkan.lunarg.com/doc/view/1.3.296.0/linux/1.3-extensions/vkspec.html#VUID-RuntimeSpirv-NonWritable-06341)
[vsg error] [Vulkan] Validation Error: [ VUID-RuntimeSpirv-NonWritable-06341 ] Object 0: handle = 0x85798b0000000067, type = VK_OBJECT_TYPE_SHADER_MODULE; | MessageID = 0x116350f | vkCreateGraphicsPipelines(): pCreateInfos[0].pStages[0] SPIR-V (VK_SHADER_STAGE_VERTEX_BIT) uses descriptor [Set 1, Binding 1, variable "vsg_viewports"] (type VK_DESCRIPTOR_TYPE_STORAGE_BUFFER or VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC) which is not marked with NonWritable, but vertexPipelineStoresAndAtomics was not enabled.
The Vulkan spec states: If vertexPipelineStoresAndAtomics is not enabled, then all storage image, storage texel buffer, and storage buffer variables in the vertex, tessellation, and geometry stages must be decorated with the NonWritable decoration (https://vulkan.lunarg.com/doc/view/1.3.296.0/linux/1.3-extensions/vkspec.html#VUID-RuntimeSpirv-NonWritable-06341)
[rocky error] Validation Error: [ VUID-RuntimeSpirv-NonWritable-06341 ] Object 0: handle = 0x85798b0000000067, type = VK_OBJECT_TYPE_SHADER_MODULE; | MessageID = 0x116350f | vkCreateGraphicsPipelines(): pCreateInfos[0].pStages[0] SPIR-V (VK_SHADER_STAGE_VERTEX_BIT) uses descriptor [Set 1, Binding 1, variable "vsg_viewports"] (type VK_DESCRIPTOR_TYPE_STORAGE_BUFFER or VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC) which is not marked with NonWritable, but vertexPipelineStoresAndAtomics was not enabled.
The Vulkan spec states: If vertexPipelineStoresAndAtomics is not enabled, then all storage image, storage texel buffer, and storage buffer variables in the vertex, tessellation, and geometry stages must be decorated with the NonWritable decoration (https://vulkan.lunarg.com/doc/view/1.3.296.0/linux/1.3-extensions/vkspec.html#VUID-RuntimeSpirv-NonWritable-06341)
[vsg error] [Vulkan] Validation Error: [ VUID-RuntimeSpirv-NonWritable-06341 ] Object 0: handle = 0x2d93ac000000006f, type = VK_OBJECT_TYPE_SHADER_MODULE; | MessageID = 0x116350f | vkCreateGraphicsPipelines(): pCreateInfos[0].pStages[0] SPIR-V (VK_SHADER_STAGE_VERTEX_BIT) uses descriptor [Set 1, Binding 1, variable "vsg_viewports"] (type VK_DESCRIPTOR_TYPE_STORAGE_BUFFER or VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC) which is not marked with NonWritable, but vertexPipelineStoresAndAtomics was not enabled.
The Vulkan spec states: If vertexPipelineStoresAndAtomics is not enabled, then all storage image, storage texel buffer, and storage buffer variables in the vertex, tessellation, and geometry stages must be decorated with the NonWritable decoration (https://vulkan.lunarg.com/doc/view/1.3.296.0/linux/1.3-extensions/vkspec.html#VUID-RuntimeSpirv-NonWritable-06341)
[rocky error] Validation Error: [ VUID-RuntimeSpirv-NonWritable-06341 ] Object 0: handle = 0x2d93ac000000006f, type = VK_OBJECT_TYPE_SHADER_MODULE; | MessageID = 0x116350f | vkCreateGraphicsPipelines(): pCreateInfos[0].pStages[0] SPIR-V (VK_SHADER_STAGE_VERTEX_BIT) uses descriptor [Set 1, Binding 1, variable "vsg_viewports"] (type VK_DESCRIPTOR_TYPE_STORAGE_BUFFER or VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC) which is not marked with NonWritable, but vertexPipelineStoresAndAtomics was not enabled.
The Vulkan spec states: If vertexPipelineStoresAndAtomics is not enabled, then all storage image, storage texel buffer, and storage buffer variables in the vertex, tessellation, and geometry stages must be decorated with the NonWritable decoration (https://vulkan.lunarg.com/doc/view/1.3.296.0/linux/1.3-extensions/vkspec.html#VUID-RuntimeSpirv-NonWritable-06341)
Segmentation fault (core dumped)

[gwaldron]

Can you please post a gdb stack trace?

gdb rocky_demo
(gdb) run
(gdb) bt

By the way, have you tried building and running the apps in vsgExamples ? It would be nice to know if you can run basic VSG stuff before trying to debug Rocky.

[trinhtuanlong]

At least vsgmaths, vsgdraw, vsgcameras, vsgbuilder, vsgtext, vsgtexturearray run just fine. Here are the gdb output:

(gdb) run
Starting program: /home/longtt/.VSG/release/rocky/bin/rocky_demo
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/x86_64-linux-gnu/libthread_db.so.1".
[vsg info] texel_margin = 12
[vsg info] quad_margin = 6
[vsg info] [Vulkan] Failed to find vkGetDeviceProcAddr in layer "libVkLayer_MESA_device_select.so"
[vsg info] [Vulkan] vkCreateDevice layer callstack setup to:
[vsg info] [Vulkan]    <Application>
[vsg info] [Vulkan]      ||
[vsg info] [Vulkan]    <Loader>
[vsg info] [Vulkan]      ||
[vsg info] [Vulkan]    <Device>
[vsg info] [Vulkan]        Using "NVIDIA T1000" with driver: "libGLX_nvidia.so.0"
[New Thread 0x7fffe1e00640 (LWP 790097)]
[New Thread 0x7fffe1400640 (LWP 790098)]
[New Thread 0x7fffd9800640 (LWP 790099)]
[New Thread 0x7fffd8e00640 (LWP 790100)]
[New Thread 0x7fffd1400640 (LWP 790101)]
[New Thread 0x7fffd0a00640 (LWP 790102)]
[New Thread 0x7fffc7e00640 (LWP 790103)]
[New Thread 0x7fffc7400640 (LWP 790104)]
[New Thread 0x7fffc6a00640 (LWP 790105)]
[New Thread 0x7fffc6000640 (LWP 790106)]
[New Thread 0x7fffc5600640 (LWP 790107)]
[New Thread 0x7fffc4c00640 (LWP 790108)]

Thread 1 "rocky_demo" received signal SIGSEGV, Segmentation fault.
0x00007ffff6aeaee2 in vsg::createBufferAndTransferData(vsg::Context&, std::vector<vsg::ref_ptr<vsg::BufferInfo>, std::allocator<vsg::ref_ptr<vsg::BufferInfo> > > const&, unsigned int, VkSharingMode) () from /home/longtt/.VSG/release/lib/libvsg.so.14
(gdb) bt
#0  0x00007ffff6aeaee2 in vsg::createBufferAndTransferData(vsg::Context&, std::vector<vsg::ref_ptr<vsg::BufferInfo>, std::allocator<vsg::ref_ptr<vsg::BufferInfo> > > const&, unsigned int, VkSharingMode) ()
   from /home/longtt/.VSG/release/lib/libvsg.so.14
#1  0x00007ffff6aa8fe9 in vsg::Geometry::compile(vsg::Context&) () from /home/longtt/.VSG/release/lib/libvsg.so.14
#2  0x00007ffff6c20309 in vsg::CompileTraversal::apply(vsg::Geometry&) () from /home/longtt/.VSG/release/lib/libvsg.so.14
#3  0x00007ffff79f4b4c in vsg::Inherit<vsg::Geometry, rocky::SharedGeometry>::accept(vsg::Visitor&) () from /home/longtt/.VSG/release/rocky/lib/librocky.so.113
#4  0x00007ffff6abdbb0 in vsg::StateGroup::traverse(vsg::Visitor&) () from /home/longtt/.VSG/release/lib/libvsg.so.14
#5  0x00005555556de0cf in void vsg::Group::t_traverse<vsg::Group, vsg::Visitor>(vsg::Group&, vsg::Visitor&) ()
#6  0x00005555556ddc0d in vsg::Group::traverse(vsg::Visitor&) ()
#7  0x00007ffff7a71b1c in vsg::Inherit<vsg::MatrixTransform, rocky::SurfaceNode>::accept(vsg::Visitor&) () from /home/longtt/.VSG/release/rocky/lib/librocky.so.113
#8  0x00005555556de0cf in void vsg::Group::t_traverse<vsg::Group, vsg::Visitor>(vsg::Group&, vsg::Visitor&) ()
#9  0x00005555556ddc0d in vsg::Group::traverse(vsg::Visitor&) ()
#10 0x00007ffff7a83234 in vsg::Inherit<vsg::CullGroup, rocky::TerrainTileNode>::accept(vsg::Visitor&) () from /home/longtt/.VSG/release/rocky/lib/librocky.so.113
#11 0x00005555556de0cf in void vsg::Group::t_traverse<vsg::Group, vsg::Visitor>(vsg::Group&, vsg::Visitor&) ()
#12 0x00005555556ddc0d in vsg::Group::traverse(vsg::Visitor&) ()
#13 0x00007ffff6abdbb0 in vsg::StateGroup::traverse(vsg::Visitor&) () from /home/longtt/.VSG/release/lib/libvsg.so.14
#14 0x00007ffff6bdcdea in vsg::CompileManager::compile(vsg::ref_ptr<vsg::Object>, std::function<bool (vsg::Context&)>)::{lambda()#1}::operator()() const () from /home/longtt/.VSG/release/lib/libvsg.so.14
#15 0x00007ffff6bdde9a in vsg::CompileManager::compile(vsg::ref_ptr<vsg::Object>, std::function<bool (vsg::Context&)>) () from /home/longtt/.VSG/release/lib/libvsg.so.14
#16 0x00007ffff7a59b52 in rocky::Runtime::compile(vsg::ref_ptr<vsg::Object>) () from /home/longtt/.VSG/release/rocky/lib/librocky.so.113
#17 0x00007ffff7a733ea in rocky::TerrainNode::createRootTiles(rocky::IOOptions const&) () from /home/longtt/.VSG/release/rocky/lib/librocky.so.113
#18 0x00007ffff7a73569 in rocky::TerrainNode::update(vsg::FrameStamp const*, rocky::IOOptions const&) () from /home/longtt/.VSG/release/rocky/lib/librocky.so.113
#19 0x00007ffff79d23e6 in rocky::MapNode::update(vsg::FrameStamp const*) () from /home/longtt/.VSG/release/rocky/lib/librocky.so.113
#20 0x00007ffff793b0df in (anonymous namespace)::AppUpdateOperation::run() () from /home/longtt/.VSG/release/rocky/lib/librocky.so.113
#21 0x00007ffff6c1784f in vsg::UpdateOperations::run() () from /home/longtt/.VSG/release/lib/libvsg.so.14
#22 0x00007ffff6be5436 in vsg::Viewer::update() () from /home/longtt/.VSG/release/lib/libvsg.so.14
#23 0x00007ffff793b644 in rocky::Application::frame() () from /home/longtt/.VSG/release/rocky/lib/librocky.so.113
#24 0x00007ffff793b42f in rocky::Application::run() () from /home/longtt/.VSG/release/rocky/lib/librocky.so.113
#25 0x000055555563ca74 in main ()

[gwaldron]

This commit 2c267142b9000c084eb4792d388aac7e3715a735 will hopefully solve the Validation Errors you are seeing on startup. Please test. No idea if that is the cause of the VSG compilation crash though.

[trinhtuanlong]

While the validation error was suppressed, I still get the segmentation fault. The gdb trace remains the same:

rocky_demo --debug
[vsg info] texel_margin = 12
[vsg info] quad_margin = 6
[vsg info] [Vulkan] Inserted device layer "VK_LAYER_KHRONOS_validation" (libVkLayer_khronos_validation.so)
[vsg info] [Vulkan] Failed to find vkGetDeviceProcAddr in layer "libVkLayer_MESA_device_select.so"
[vsg info] [Vulkan] vkCreateDevice layer callstack setup to:
[vsg info] [Vulkan]    <Application>
[vsg info] [Vulkan]      ||
[vsg info] [Vulkan]    <Loader>
[vsg info] [Vulkan]      ||
[vsg info] [Vulkan]    VK_LAYER_KHRONOS_validation
[vsg info] [Vulkan]            Type: Explicit
[vsg info] [Vulkan]            Manifest: /usr/share/vulkan/explicit_layer.d/VkLayer_khronos_validation.json
[vsg info] [Vulkan]            Library:  libVkLayer_khronos_validation.so
[vsg info] [Vulkan]      ||
[vsg info] [Vulkan]    <Device>
[vsg info] [Vulkan]        Using "NVIDIA T1000" with driver: "libGLX_nvidia.so.0"
Segmentation fault (core dumped)

(gdb) run
Starting program: /home/longtt/.VSG/release/rocky/bin/rocky_demo
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/x86_64-linux-gnu/libthread_db.so.1".
[vsg info] texel_margin = 12
[vsg info] quad_margin = 6
[vsg info] [Vulkan] Failed to find vkGetDeviceProcAddr in layer "libVkLayer_MESA_device_select.so"
[vsg info] [Vulkan] vkCreateDevice layer callstack setup to:
[vsg info] [Vulkan]    <Application>
[vsg info] [Vulkan]      ||
[vsg info] [Vulkan]    <Loader>
[vsg info] [Vulkan]      ||
[vsg info] [Vulkan]    <Device>
[vsg info] [Vulkan]        Using "NVIDIA T1000" with driver: "libGLX_nvidia.so.0"
[New Thread 0x7fffe1e00640 (LWP 859885)]
[New Thread 0x7fffe1400640 (LWP 859886)]
[New Thread 0x7fffd9800640 (LWP 859887)]
[New Thread 0x7fffd8e00640 (LWP 859888)]
[New Thread 0x7fffd1400640 (LWP 859889)]
[New Thread 0x7fffd0a00640 (LWP 859890)]
[New Thread 0x7fffc7e00640 (LWP 859891)]
[New Thread 0x7fffc7400640 (LWP 859892)]
[New Thread 0x7fffc6a00640 (LWP 859893)]
[New Thread 0x7fffc6000640 (LWP 859894)]
[New Thread 0x7fffc5600640 (LWP 859895)]
[New Thread 0x7fffc4c00640 (LWP 859896)]

Thread 1 "rocky_demo" received signal SIGSEGV, Segmentation fault.
0x00007ffff6aeaee2 in vsg::createBufferAndTransferData(vsg::Context&, std::vector<vsg::ref_ptr<vsg::BufferInfo>, std::allocator<vsg::ref_ptr<vsg::BufferInfo> > > const&, unsigned int, VkSharingMode) () from /home/longtt/.VSG/release/lib/libvsg.so.14
(gdb) bt
#0  0x00007ffff6aeaee2 in vsg::createBufferAndTransferData(vsg::Context&, std::vector<vsg::ref_ptr<vsg::BufferInfo>, std::allocator<vsg::ref_ptr<vsg::BufferInfo> > > const&, unsigned int, VkSharingMode) ()
   from /home/longtt/.VSG/release/lib/libvsg.so.14
#1  0x00007ffff6aa8fe9 in vsg::Geometry::compile(vsg::Context&) () from /home/longtt/.VSG/release/lib/libvsg.so.14
#2  0x00007ffff6c20309 in vsg::CompileTraversal::apply(vsg::Geometry&) () from /home/longtt/.VSG/release/lib/libvsg.so.14
#3  0x00007ffff79f4b4c in vsg::Inherit<vsg::Geometry, rocky::SharedGeometry>::accept(vsg::Visitor&) () from /home/longtt/.VSG/release/rocky/lib/librocky.so.113
#4  0x00007ffff6abdbb0 in vsg::StateGroup::traverse(vsg::Visitor&) () from /home/longtt/.VSG/release/lib/libvsg.so.14
#5  0x00005555556de0cf in void vsg::Group::t_traverse<vsg::Group, vsg::Visitor>(vsg::Group&, vsg::Visitor&) ()
#6  0x00005555556ddc0d in vsg::Group::traverse(vsg::Visitor&) ()
#7  0x00007ffff7a71b1c in vsg::Inherit<vsg::MatrixTransform, rocky::SurfaceNode>::accept(vsg::Visitor&) () from /home/longtt/.VSG/release/rocky/lib/librocky.so.113
#8  0x00005555556de0cf in void vsg::Group::t_traverse<vsg::Group, vsg::Visitor>(vsg::Group&, vsg::Visitor&) ()
#9  0x00005555556ddc0d in vsg::Group::traverse(vsg::Visitor&) ()
#10 0x00007ffff7a83234 in vsg::Inherit<vsg::CullGroup, rocky::TerrainTileNode>::accept(vsg::Visitor&) () from /home/longtt/.VSG/release/rocky/lib/librocky.so.113
#11 0x00005555556de0cf in void vsg::Group::t_traverse<vsg::Group, vsg::Visitor>(vsg::Group&, vsg::Visitor&) ()
#12 0x00005555556ddc0d in vsg::Group::traverse(vsg::Visitor&) ()
#13 0x00007ffff6abdbb0 in vsg::StateGroup::traverse(vsg::Visitor&) () from /home/longtt/.VSG/release/lib/libvsg.so.14
#14 0x00007ffff6bdcdea in vsg::CompileManager::compile(vsg::ref_ptr<vsg::Object>, std::function<bool (vsg::Context&)>)::{lambda()#1}::operator()() const () from /home/longtt/.VSG/release/lib/libvsg.so.14
#15 0x00007ffff6bdde9a in vsg::CompileManager::compile(vsg::ref_ptr<vsg::Object>, std::function<bool (vsg::Context&)>) () from /home/longtt/.VSG/release/lib/libvsg.so.14
#16 0x00007ffff7a59b52 in rocky::Runtime::compile(vsg::ref_ptr<vsg::Object>) () from /home/longtt/.VSG/release/rocky/lib/librocky.so.113
#17 0x00007ffff7a733ea in rocky::TerrainNode::createRootTiles(rocky::IOOptions const&) () from /home/longtt/.VSG/release/rocky/lib/librocky.so.113
#18 0x00007ffff7a73569 in rocky::TerrainNode::update(vsg::FrameStamp const*, rocky::IOOptions const&) () from /home/longtt/.VSG/release/rocky/lib/librocky.so.113
#19 0x00007ffff79d23e6 in rocky::MapNode::update(vsg::FrameStamp const*) () from /home/longtt/.VSG/release/rocky/lib/librocky.so.113
#20 0x00007ffff793b0df in (anonymous namespace)::AppUpdateOperation::run() () from /home/longtt/.VSG/release/rocky/lib/librocky.so.113
#21 0x00007ffff6c1784f in vsg::UpdateOperations::run() () from /home/longtt/.VSG/release/lib/libvsg.so.14
#22 0x00007ffff6be5436 in vsg::Viewer::update() () from /home/longtt/.VSG/release/lib/libvsg.so.14
#23 0x00007ffff793b644 in rocky::Application::frame() () from /home/longtt/.VSG/release/rocky/lib/librocky.so.113
#24 0x00007ffff793b42f in rocky::Application::run() () from /home/longtt/.VSG/release/rocky/lib/librocky.so.113
#25 0x000055555563ca74 in main ()

[trinhtuanlong]

For what it's worth, here is the full api dump. api_dump.txt

[gwaldron]

I'm afraid I am at a loss on this one... If you are handy with gdb (I am not) perhaps you can query some of the member variables in vsg::Geometry to see if something's null or uninitialized. Beyond that I can only suggest posting something on VSG Discussions to see if anyone has any tips.