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ClearVolume / clearvolume

ClearVolume is a real-time live 3D visualization library designed for high-end volumetric microscopes such as SPIM and DLSM microscopes. With ClearVolume you can see live on your screen the stacks acquired by your microscope instead of waiting for offline post-processing to give you an intuitive and comprehensive view on your data.
http://clearvolume.github.io
GNU Lesser General Public License v3.0
43 stars 11 forks source link

ExceptionInInitializerError #21

Closed tibuch closed 7 years ago

tibuch commented 9 years ago

Hello I would like to use Clear Volume but get a ExceptionInInitializerError.

I use Linux Mint 17.1 and this is the output of glxinfo:

name of display: :0.0
display: :0  screen: 0
direct rendering: Yes
server glx vendor string: NVIDIA Corporation
server glx version string: 1.4
server glx extensions:
    GLX_ARB_create_context, GLX_ARB_create_context_profile, 
    GLX_ARB_create_context_robustness, GLX_ARB_fbconfig_float, 
    GLX_ARB_multisample, GLX_EXT_buffer_age, 
    GLX_EXT_create_context_es2_profile, GLX_EXT_create_context_es_profile, 
    GLX_EXT_framebuffer_sRGB, GLX_EXT_swap_control, GLX_EXT_swap_control_tear, 
    GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info, GLX_EXT_visual_rating, 
    GLX_NV_float_buffer, GLX_NV_multisample_coverage, GLX_SGIX_fbconfig, 
    GLX_SGIX_pbuffer, GLX_SGI_swap_control, GLX_SGI_video_sync
client glx vendor string: NVIDIA Corporation
client glx version string: 1.4
client glx extensions:
    GLX_ARB_create_context, GLX_ARB_create_context_profile, 
    GLX_ARB_create_context_robustness, GLX_ARB_fbconfig_float, 
    GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_buffer_age, 
    GLX_EXT_create_context_es2_profile, GLX_EXT_create_context_es_profile, 
    GLX_EXT_fbconfig_packed_float, GLX_EXT_framebuffer_sRGB, 
    GLX_EXT_import_context, GLX_EXT_swap_control, GLX_EXT_swap_control_tear, 
    GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info, GLX_EXT_visual_rating, 
    GLX_NV_copy_image, GLX_NV_float_buffer, GLX_NV_multisample_coverage, 
    GLX_NV_present_video, GLX_NV_swap_group, GLX_NV_video_capture, 
    GLX_NV_video_out, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, 
    GLX_SGI_swap_control, GLX_SGI_video_sync
GLX version: 1.4
GLX extensions:
    GLX_ARB_create_context, GLX_ARB_create_context_profile, 
    GLX_ARB_create_context_robustness, GLX_ARB_fbconfig_float, 
    GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_buffer_age, 
    GLX_EXT_create_context_es2_profile, GLX_EXT_create_context_es_profile, 
    GLX_EXT_framebuffer_sRGB, GLX_EXT_swap_control, GLX_EXT_swap_control_tear, 
    GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info, GLX_EXT_visual_rating, 
    GLX_NV_float_buffer, GLX_NV_multisample_coverage, GLX_SGIX_fbconfig, 
    GLX_SGIX_pbuffer, GLX_SGI_swap_control, GLX_SGI_video_sync
OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: GeForce GT 220/PCIe/SSE2
OpenGL core profile version string: 3.3.0 NVIDIA 331.113
OpenGL core profile shading language version string: 3.30 NVIDIA via Cg compiler
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
    GL_ARB_ES2_compatibility, GL_ARB_ES3_compatibility, 
    GL_ARB_arrays_of_arrays, GL_ARB_base_instance, GL_ARB_blend_func_extended, 
    GL_ARB_clear_buffer_object, GL_ARB_color_buffer_float, 
    GL_ARB_compressed_texture_pixel_storage, GL_ARB_conservative_depth, 
    GL_ARB_copy_buffer, GL_ARB_copy_image, GL_ARB_debug_output, 
    GL_ARB_depth_buffer_float, GL_ARB_depth_clamp, GL_ARB_depth_texture, 
    GL_ARB_draw_buffers, GL_ARB_draw_buffers_blend, 
    GL_ARB_draw_elements_base_vertex, GL_ARB_draw_instanced, 
    GL_ARB_enhanced_layouts, GL_ARB_explicit_attrib_location, 
    GL_ARB_explicit_uniform_location, GL_ARB_fragment_coord_conventions, 
    GL_ARB_fragment_layer_viewport, GL_ARB_fragment_program, 
    GL_ARB_fragment_program_shadow, GL_ARB_fragment_shader, 
    GL_ARB_framebuffer_no_attachments, GL_ARB_framebuffer_object, 
    GL_ARB_framebuffer_sRGB, GL_ARB_geometry_shader4, 
    GL_ARB_get_program_binary, GL_ARB_half_float_pixel, 
    GL_ARB_half_float_vertex, GL_ARB_imaging, GL_ARB_instanced_arrays, 
    GL_ARB_internalformat_query, GL_ARB_internalformat_query2, 
    GL_ARB_invalidate_subdata, GL_ARB_map_buffer_alignment, 
    GL_ARB_map_buffer_range, GL_ARB_multi_bind, GL_ARB_multisample, 
    GL_ARB_multitexture, GL_ARB_occlusion_query, GL_ARB_occlusion_query2, 
    GL_ARB_pixel_buffer_object, GL_ARB_point_parameters, GL_ARB_point_sprite, 
    GL_ARB_program_interface_query, GL_ARB_provoking_vertex, 
    GL_ARB_robust_buffer_access_behavior, GL_ARB_robustness, 
    GL_ARB_sample_shading, GL_ARB_sampler_objects, GL_ARB_seamless_cube_map, 
    GL_ARB_separate_shader_objects, GL_ARB_shader_bit_encoding, 
    GL_ARB_shader_objects, GL_ARB_shader_texture_lod, 
    GL_ARB_shading_language_100, GL_ARB_shading_language_420pack, 
    GL_ARB_shading_language_include, GL_ARB_shading_language_packing, 
    GL_ARB_shadow, GL_ARB_stencil_texturing, GL_ARB_sync, 
    GL_ARB_texture_border_clamp, GL_ARB_texture_buffer_object, 
    GL_ARB_texture_buffer_range, GL_ARB_texture_compression, 
    GL_ARB_texture_compression_rgtc, GL_ARB_texture_cube_map, 
    GL_ARB_texture_cube_map_array, GL_ARB_texture_env_add, 
    GL_ARB_texture_env_combine, GL_ARB_texture_env_crossbar, 
    GL_ARB_texture_env_dot3, GL_ARB_texture_float, GL_ARB_texture_gather, 
    GL_ARB_texture_mirror_clamp_to_edge, GL_ARB_texture_mirrored_repeat, 
    GL_ARB_texture_multisample, GL_ARB_texture_non_power_of_two, 
    GL_ARB_texture_query_levels, GL_ARB_texture_query_lod, 
    GL_ARB_texture_rectangle, GL_ARB_texture_rg, GL_ARB_texture_rgb10_a2ui, 
    GL_ARB_texture_stencil8, GL_ARB_texture_storage, 
    GL_ARB_texture_storage_multisample, GL_ARB_texture_swizzle, 
    GL_ARB_texture_view, GL_ARB_timer_query, GL_ARB_transform_feedback2, 
    GL_ARB_transform_feedback_instanced, GL_ARB_transpose_matrix, 
    GL_ARB_uniform_buffer_object, GL_ARB_vertex_array_bgra, 
    GL_ARB_vertex_array_object, GL_ARB_vertex_attrib_binding, 
    GL_ARB_vertex_buffer_object, GL_ARB_vertex_program, GL_ARB_vertex_shader, 
    GL_ARB_vertex_type_10f_11f_11f_rev, GL_ARB_vertex_type_2_10_10_10_rev, 
    GL_ARB_viewport_array, GL_ARB_window_pos, GL_ATI_draw_buffers, 
    GL_ATI_texture_float, GL_ATI_texture_mirror_once, 
    GL_EXTX_framebuffer_mixed_formats, GL_EXT_Cg_shader, GL_EXT_abgr, 
    GL_EXT_bgra, GL_EXT_bindable_uniform, GL_EXT_blend_color, 
    GL_EXT_blend_equation_separate, GL_EXT_blend_func_separate, 
    GL_EXT_blend_minmax, GL_EXT_blend_subtract, GL_EXT_compiled_vertex_array, 
    GL_EXT_depth_bounds_test, GL_EXT_direct_state_access, 
    GL_EXT_draw_buffers2, GL_EXT_draw_instanced, GL_EXT_draw_range_elements, 
    GL_EXT_fog_coord, GL_EXT_framebuffer_blit, GL_EXT_framebuffer_multisample, 
    GL_EXT_framebuffer_multisample_blit_scaled, GL_EXT_framebuffer_object, 
    GL_EXT_framebuffer_sRGB, GL_EXT_geometry_shader4, 
    GL_EXT_gpu_program_parameters, GL_EXT_gpu_shader4, 
    GL_EXT_import_sync_object, GL_EXT_multi_draw_arrays, 
    GL_EXT_packed_depth_stencil, GL_EXT_packed_float, GL_EXT_packed_pixels, 
    GL_EXT_pixel_buffer_object, GL_EXT_point_parameters, 
    GL_EXT_provoking_vertex, GL_EXT_rescale_normal, GL_EXT_secondary_color, 
    GL_EXT_separate_shader_objects, GL_EXT_separate_specular_color, 
    GL_EXT_shadow_funcs, GL_EXT_stencil_two_side, GL_EXT_stencil_wrap, 
    GL_EXT_texture3D, GL_EXT_texture_array, GL_EXT_texture_buffer_object, 
    GL_EXT_texture_compression_dxt1, GL_EXT_texture_compression_latc, 
    GL_EXT_texture_compression_rgtc, GL_EXT_texture_compression_s3tc, 
    GL_EXT_texture_cube_map, GL_EXT_texture_edge_clamp, 
    GL_EXT_texture_env_add, GL_EXT_texture_env_combine, 
    GL_EXT_texture_env_dot3, GL_EXT_texture_filter_anisotropic, 
    GL_EXT_texture_integer, GL_EXT_texture_lod, GL_EXT_texture_lod_bias, 
    GL_EXT_texture_mirror_clamp, GL_EXT_texture_object, GL_EXT_texture_sRGB, 
    GL_EXT_texture_sRGB_decode, GL_EXT_texture_shared_exponent, 
    GL_EXT_texture_storage, GL_EXT_texture_swizzle, GL_EXT_timer_query, 
    GL_EXT_transform_feedback2, GL_EXT_vertex_array, GL_EXT_vertex_array_bgra, 
    GL_EXT_x11_sync_object, GL_IBM_rasterpos_clip, 
    GL_IBM_texture_mirrored_repeat, GL_KHR_debug, GL_KTX_buffer_region, 
    GL_NVX_conditional_render, GL_NVX_gpu_memory_info, 
    GL_NV_ES1_1_compatibility, GL_NV_blend_square, GL_NV_conditional_render, 
    GL_NV_copy_depth_to_color, GL_NV_copy_image, GL_NV_depth_buffer_float, 
    GL_NV_depth_clamp, GL_NV_explicit_multisample, GL_NV_fence, 
    GL_NV_float_buffer, GL_NV_fog_distance, GL_NV_fragment_program, 
    GL_NV_fragment_program2, GL_NV_fragment_program_option, 
    GL_NV_framebuffer_multisample_coverage, GL_NV_geometry_shader4, 
    GL_NV_gpu_program4, GL_NV_gpu_program4_1, GL_NV_half_float, 
    GL_NV_light_max_exponent, GL_NV_multisample_coverage, 
    GL_NV_multisample_filter_hint, GL_NV_occlusion_query, 
    GL_NV_packed_depth_stencil, GL_NV_parameter_buffer_object, 
    GL_NV_parameter_buffer_object2, GL_NV_path_rendering, 
    GL_NV_pixel_data_range, GL_NV_point_sprite, GL_NV_primitive_restart, 
    GL_NV_register_combiners, GL_NV_register_combiners2, 
    GL_NV_shader_buffer_load, GL_NV_texgen_reflection, GL_NV_texture_barrier, 
    GL_NV_texture_compression_vtc, GL_NV_texture_env_combine4, 
    GL_NV_texture_expand_normal, GL_NV_texture_multisample, 
    GL_NV_texture_rectangle, GL_NV_texture_shader, GL_NV_texture_shader2, 
    GL_NV_texture_shader3, GL_NV_transform_feedback, 
    GL_NV_transform_feedback2, GL_NV_vdpau_interop, GL_NV_vertex_array_range, 
    GL_NV_vertex_array_range2, GL_NV_vertex_buffer_unified_memory, 
    GL_NV_vertex_program, GL_NV_vertex_program1_1, GL_NV_vertex_program2, 
    GL_NV_vertex_program2_option, GL_NV_vertex_program3, GL_S3_s3tc, 
    GL_SGIS_generate_mipmap, GL_SGIS_texture_lod, GL_SGIX_depth_texture, 
    GL_SGIX_shadow, GL_SUN_slice_accum

OpenGL version string: 3.3.0 NVIDIA 331.113
OpenGL shading language version string: 3.30 NVIDIA via Cg compiler
OpenGL context flags: (none)
OpenGL profile mask: (none)

The exception:

java.lang.ExceptionInInitializerError
    at clearvolume.renderer.opencl.OpenCLAvailability.isOpenCLAvailable(OpenCLAvailability.java:9)
    at clearvolume.renderer.factory.ClearVolumeRendererFactory.newOpenCLRenderer(ClearVolumeRendererFactory.java:252)
    at de.mpicbg.jug.clearvolume.ImgLib2ClearVolume.initClearVolumeUnsignedShortArrayImg(ImgLib2ClearVolume.java:249)
    at de.mpicbg.jug.clearvolume.ImgLib2ClearVolume.initRealImgs(ImgLib2ClearVolume.java:418)
    at de.mpicbg.jug.clearvolume.gui.ClearVolumeManager.run(ClearVolumeManager.java:156)
    at de.mpicbg.jug.clearvolume.gui.GenericClearVolumeGui.launchClearVolumeManager(GenericClearVolumeGui.java:208)
    at de.mpicbg.jug.clearvolume.gui.GenericClearVolumeGui.<init>(GenericClearVolumeGui.java:135)
    at de.mpicbg.knime.ip.clearvolume.base.ClearVolumeTableCellView$1.run(ClearVolumeTableCellView.java:109)
    at de.mpicbg.knime.ip.clearvolume.base.ClearVolumeTableCellView.updateComponent(ClearVolumeTableCellView.java:120)
    at org.knime.knip.base.nodes.view.TableCellViewNodeView.tabSelectionChanged(TableCellViewNodeView.java:465)
    at org.knime.knip.base.nodes.view.TableCellViewNodeView$4.stateChanged(TableCellViewNodeView.java:369)
    at javax.swing.JTabbedPane.fireStateChanged(JTabbedPane.java:416)
    at javax.swing.JTabbedPane$ModelListener.stateChanged(JTabbedPane.java:270)
    at javax.swing.DefaultSingleSelectionModel.fireStateChanged(DefaultSingleSelectionModel.java:132)
    at javax.swing.DefaultSingleSelectionModel.setSelectedIndex(DefaultSingleSelectionModel.java:67)
    at javax.swing.JTabbedPane.setSelectedIndexImpl(JTabbedPane.java:616)
    at javax.swing.JTabbedPane.setSelectedIndex(JTabbedPane.java:591)
    at javax.swing.plaf.basic.BasicTabbedPaneUI$Handler.mousePressed(BasicTabbedPaneUI.java:3647)
    at java.awt.Component.processMouseEvent(Component.java:6522)
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
    at java.awt.Component.processEvent(Component.java:6290)
    at java.awt.Container.processEvent(Container.java:2234)
    at java.awt.Component.dispatchEventImpl(Component.java:4881)
    at java.awt.Container.dispatchEventImpl(Container.java:2292)
    at java.awt.Component.dispatchEvent(Component.java:4703)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4898)
    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4530)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4462)
    at java.awt.Container.dispatchEventImpl(Container.java:2278)
    at java.awt.Window.dispatchEventImpl(Window.java:2750)
    at java.awt.Component.dispatchEvent(Component.java:4703)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
    at java.awt.EventQueue.access$500(EventQueue.java:97)
    at java.awt.EventQueue$3.run(EventQueue.java:709)
    at java.awt.EventQueue$3.run(EventQueue.java:703)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86)
    at java.awt.EventQueue$4.run(EventQueue.java:731)
    at java.awt.EventQueue$4.run(EventQueue.java:729)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
Caused by: com.nativelibs4java.opencl.CLException: OpenCL Error :  (make sure to log all errors with environment variable CL_LOG_ERRORS=stdout)
    at com.nativelibs4java.opencl.CLException.error(CLException.java:310)
    at com.nativelibs4java.opencl.JavaCL$OpenCLProbeLibrary.getPlatformIDs(JavaCL.java:155)
    at com.nativelibs4java.opencl.JavaCL$OpenCLProbeLibrary.hasOpenCL1_0(JavaCL.java:166)
    at com.nativelibs4java.opencl.JavaCL.<clinit>(JavaCL.java:225)
    ... 49 more
Relaunching CV session was interrupted in GenericClearVolumeGui!
java.lang.NullPointerException
    at de.mpicbg.jug.clearvolume.ImgLib2ClearVolume.initClearVolumeUnsignedShortArrayImg(ImgLib2ClearVolume.java:264)
    at de.mpicbg.jug.clearvolume.ImgLib2ClearVolume.initRealImgs(ImgLib2ClearVolume.java:418)
    at de.mpicbg.jug.clearvolume.gui.ClearVolumeManager.run(ClearVolumeManager.java:156)
    at de.mpicbg.jug.clearvolume.gui.GenericClearVolumeGui.launchClearVolumeManager(GenericClearVolumeGui.java:208)
    at de.mpicbg.jug.clearvolume.gui.GenericClearVolumeGui.<init>(GenericClearVolumeGui.java:135)
    at de.mpicbg.knime.ip.clearvolume.base.ClearVolumeTableCellView$1.run(ClearVolumeTableCellView.java:109)
    at de.mpicbg.knime.ip.clearvolume.base.ClearVolumeTableCellView.updateComponent(ClearVolumeTableCellView.java:120)
    at org.knime.knip.base.nodes.view.TableCellViewNodeView.tabSelectionChanged(TableCellViewNodeView.java:465)
    at org.knime.knip.base.nodes.view.TableCellViewNodeView$4.stateChanged(TableCellViewNodeView.java:369)
    at javax.swing.JTabbedPane.fireStateChanged(JTabbedPane.java:416)
    at javax.swing.JTabbedPane$ModelListener.stateChanged(JTabbedPane.java:270)
    at javax.swing.DefaultSingleSelectionModel.fireStateChanged(DefaultSingleSelectionModel.java:132)
    at javax.swing.DefaultSingleSelectionModel.setSelectedIndex(DefaultSingleSelectionModel.java:67)
    at javax.swing.JTabbedPane.setSelectedIndexImpl(JTabbedPane.java:616)
    at javax.swing.JTabbedPane.setSelectedIndex(JTabbedPane.java:591)
    at javax.swing.plaf.basic.BasicTabbedPaneUI$Handler.mousePressed(BasicTabbedPaneUI.java:3647)
    at java.awt.Component.processMouseEvent(Component.java:6522)
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
    at java.awt.Component.processEvent(Component.java:6290)
    at java.awt.Container.processEvent(Container.java:2234)
    at java.awt.Component.dispatchEventImpl(Component.java:4881)
    at java.awt.Container.dispatchEventImpl(Container.java:2292)
    at java.awt.Component.dispatchEvent(Component.java:4703)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4898)
    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4530)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4462)
    at java.awt.Container.dispatchEventImpl(Container.java:2278)
    at java.awt.Window.dispatchEventImpl(Window.java:2750)
    at java.awt.Component.dispatchEvent(Component.java:4703)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
    at java.awt.EventQueue.access$500(EventQueue.java:97)
    at java.awt.EventQueue$3.run(EventQueue.java:709)
    at java.awt.EventQueue$3.run(EventQueue.java:703)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86)
    at java.awt.EventQueue$4.run(EventQueue.java:731)
    at java.awt.EventQueue$4.run(EventQueue.java:729)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

And I have a GeForce GT 220.

If you need any further information let me know.

royerloic commented 9 years ago

Your OpenGL version seems to be sufficient... But, it seems that OpenCL is not available on your machine. Check this: http://streamcomputing.eu/blog/2011-06-24/install-opencl-on-debianubuntu-orderly/ (or other Google links) You probably have to install some drivers to get it to work... Sorry that I cannot be more specific - I am not a Mint user. When you find the solution, would you mind contributing to the wiki?

skalarproduktraum commented 9 years ago

@royerloic: Do you know whether CUDA is working with the KNIME plugin currently? It might be easier to get it running with CUDA on Linux.

royerloic commented 9 years ago

Right now it's hard coded with OpenCL, because we have had too many instability problems with CUDA+Swing (!?). It's very strange, with the latest NVIDIA drivers OpenCL should just work fine... unless there is some issue specific to Mint (ignore previous deleted message which really was about another issue)

skalarproduktraum commented 8 years ago

@tibuch: We have recently discovered that some Linux distributions cripple the OpenCL libraries that e.g. Nvidia ship. In addition to the driver installed, you also need an ICD (Installable Client Driver), which bridge between the OpenCL libraries and the graphics driver (see e.g. http://stackoverflow.com/questions/29046595/nvidia-opencl-on-trusty-or-mint-17 and https://wiki.tiker.net/OpenCLHowTo). To verify this is setup correctly you can try and run the clinfo command (of package clinfo). If it doesn't report problems, then ClearVolume should also work. We will document the setup steps better, especially for Linux.

Please let us know if you had any success so we can close this issue :)