Cross Section Tool for Meshes by alemuntoni · Pull Request #36 · cnr-isti-vclab/vclib

alemuntoni · 2026-04-15T14:32:54Z

Introduce cross-section rendering support across the rendering pipeline, including new data structures, uniform handling, and Qt UI integration. The main changes add the ability to configure, propagate, and bind cross-section settings for meshes and lines, and expose these controls in the GUI.

Cross-section rendering support

Added CrossSectionSettings member and related getter/setter methods to AbstractDrawableMesh, ensuring all drawable meshes can store and update cross-section parameters.
Implemented propagation of cross-section settings to mesh render buffers and lines, ensuring rendering code can access and use these settings.
Integrated cross-section uniform handling with new CrossSectionUniforms class, which manages GPU uniform updates and binding for cross-section parameters.

Qt GUI integration

Added CrossSectionSettingsFrame and related signals/slots to the mesh render settings UI, enabling users to view and update cross-section settings interactively.
Updated signal names and propagation to distinguish between mesh render and cross-section settings changes, improving event handling in the UI.

These changes collectively enable cross-section rendering features throughout the rendering stack, from data structures and GPU uniforms to user-facing controls in the Qt GUI.

TODO:

~~Cross Section tool for ImGUI~~ (Will be added when Widgets: Added SliderFloatRange2(), SliderIntRange2() for range selection (#76) ocornut/imgui#9164 is merged)

…sses

…ass and UI

…hroughout code

…rame

…cros

…D shaders

…dateCrossSectionUniforms()

…ngs directory

…tructure

…lt zero values

# Conflicts: # vclib/render/include/vclib/bgfx/drawable/drawable_mesh_bgfx.h

…shaders

# Conflicts: # vclib/render/include/vclib/bgfx/drawable/drawable_mesh_bgfx.h

# Conflicts: # vclib/render/include/vclib/qt/gui/mesh_render_settings_frame.h # vclib/render/include/vclib/qt/mesh_viewer.h # vclib/render/src/vclib/qt/gui/mesh_render_settings_frame.cpp # vclib/render/src/vclib/qt/mesh_viewer.cpp

…ly-to-all mode

…box and logic

# Conflicts: # vclib/render/include/vclib/bgfx/drawable/drawable_mesh_bgfx.h # vclib/render/include/vclib/render/drawable/abstract_drawable_mesh.h # vclib/render/shaders/vclib/bgfx/drawable/drawable_mesh/points/varying.def.sc # vclib/render/shaders/vclib/bgfx/drawable/drawable_mesh/points/vs_points.sc # vclib/render/shaders/vclib/bgfx/drawable/drawable_mesh/points_instance/fs_points_instance.sc # vclib/render/shaders/vclib/bgfx/drawable/drawable_mesh/points_instance/varying.def.sc # vclib/render/shaders/vclib/bgfx/drawable/drawable_mesh/points_instance/vs_points_instance.sc

# Conflicts: # vclib/render/include/vclib/bgfx/drawable/mesh/mesh_render_buffers.h # vclib/render/shaders/vclib/bgfx/drawable/drawable_mesh/points/fs_points.sc # vclib/render/shaders/vclib/bgfx/drawable/drawable_mesh/points/varying.def.sc # vclib/render/shaders/vclib/bgfx/drawable/drawable_mesh/points/vs_points.sc # vclib/render/shaders/vclib/bgfx/drawable/drawable_mesh/points_id/varying.def.sc # vclib/render/shaders/vclib/bgfx/drawable/drawable_mesh/points_id/vs_points_id.sc # vclib/render/shaders/vclib/bgfx/drawable/drawable_mesh/points_instance/fs_points_instance.sc # vclib/render/shaders/vclib/bgfx/drawable/drawable_mesh/points_instance/varying.def.sc # vclib/render/shaders/vclib/bgfx/drawable/drawable_mesh/points_instance/vs_points_instance.sc # vclib/render/shaders/vclib/bgfx/drawable/drawable_mesh/points_instance_id/fs_points_instance_id.sc # vclib/render/shaders/vclib/bgfx/drawable/drawable_mesh/points_instance_id/varying.def.sc # vclib/render/shaders/vclib/bgfx/drawable/drawable_mesh/points_instance_id/vs_points_instance_id.sc # vclib/render/shaders/vclib/bgfx/primitives/points/fs_points_id_in.sh

…aders

# Conflicts: # vclib/render/include/vclib/bgfx/drawable/drawable_mesh_bgfx.h # vclib/render/src/vclib/bgfx/primitives/points.cpp

# Conflicts: # vclib/render/src/vclib/qt/gui/mesh_render_settings_frame.cpp

# Conflicts: # vclib/render/shaders/vclib/bgfx/drawable/drawable_mesh/surface/fs_surface_in.sh # vclib/render/shaders/vclib/bgfx/drawable/drawable_mesh/surface/vs_surface_in.sh # vclib/render/shaders/vclib/bgfx/drawable/drawable_mesh/surface_id/fs_surface_id.sc # vclib/render/shaders/vclib/bgfx/drawable/drawable_mesh/surface_pbr/fs_surface_pbr.sc # vclib/render/shaders/vclib/bgfx/drawable/drawable_mesh/surface_pbr/vs_surface_pbr.sc

# Conflicts: # vclib/render/include/vclib/bgfx/drawable/drawable_mesh_bgfx.h # vclib/render/include/vclib/bgfx/primitives/lines.h # vclib/render/include/vclib/render/drawable/abstract_drawable_mesh.h # vclib/render/shaders/vclib/bgfx/primitives/lines/cpu_generated_lines/fs_cpu_generated_lines.sc # vclib/render/shaders/vclib/bgfx/primitives/lines/cpu_generated_lines/vs_cpu_generated_lines.sc # vclib/render/shaders/vclib/bgfx/primitives/lines/fs_lines_id_in.sh # vclib/render/shaders/vclib/bgfx/primitives/lines/fs_lines_in.sh # vclib/render/shaders/vclib/bgfx/primitives/lines/primitive_lines/vs_primitive_lines.sc # vclib/render/shaders/vclib/bgfx/primitives/uniforms/lines_uniforms.sh

# Conflicts: # vclib/render/include/vclib/bgfx/primitives/lines.h # vclib/render/include/vclib/bgfx/primitives/points.h # vclib/render/shaders/vclib/bgfx/primitives/lines/fs_lines_in.sh # vclib/render/shaders/vclib/bgfx/primitives/lines/lines.config # vclib/render/shaders/vclib/bgfx/primitives/lines/varying.def.sc # vclib/render/src/vclib/bgfx/primitives/lines.cpp

# Conflicts: # vclib/render/include/vclib/bgfx/drawable/drawable_mesh_bgfx.h

alemuntoni added 30 commits April 1, 2026 15:41

[render] add CrossSectionUniforms class

4782a9e

[render] add CrossSectionUniforms shader header

73726c7

[render] Add cross-section uniforms and controls to drawable mesh cla…

45d28b3

…sses

[render] per vertex and per fragment cross section

9409624

[render] implement cross section for drawable mesh surface

9207f49

[render] Refactor cross section settings into CrossSectionSettings cl…

16622eb

…ass and UI

[render] Fix input on surface fragment shaders

ca6a604

[render] Rename settingsUpdated signal to meshRenderSettingsUpdated t…

907d79f

…hroughout code

[render] CrossSectionSettingsFrame class

6462ce1

[render] Add cross-section controls and signal handlers to settings f…

aba1c42

…rame

[render] add X slider to CrossSectionFrame

b0ecf72

[render] CrossSectionFrame x slider working as expected

1d11f09

[render] CrossSectionSettingsFrame working

5720c7d

Merge branch 'main' into cross_section

b886a33

Merge branch 'main' into cross_section

d7a0b96

[render] Refactor cross-section discard logic into reusable shader ma…

efdaa00

…cros

[render] Add cross-section clipping to mesh surface pbr and surface I…

e6e2f7b

…D shaders

[render] DrawableMesh: Refactor cross-section uniform updates into up…

cbf32a3

…dateCrossSectionUniforms()

[render] Add cross-section clipping support to points_instance shaders

c468fbd

Merge branch 'main' into cross_section

94ea469

[render] Move CrossSectionSettings from drawable/mesh to render/setti…

72739a0

…ngs directory

[render] Add CrossSection clipping to lines

81802a2

[render] Move CrossSectionSettingsFrame to tab widget and update UI s…

42cb29b

…tructure

[render] separate cross section inputs/outputs in all the shaders

88eb967

[render] varying.def indent fixes

1f13489

Merge branch 'main' into cross_section

7cb33ad

[render] cross section on primitve points shader

74d8efe

[render] cross section on primitive lines

8203e19

[render] small fixes

4b4d736

[render] enable cross section for all remaining surface shaders

6e5c88a

alemuntoni added 30 commits July 1, 2026 17:29

[render] fix dx error: initialize unused varying variables with defau…

eea2629

…lt zero values

Merge branch 'main' into cross_section

fbf66a4

# Conflicts: # vclib/render/include/vclib/bgfx/drawable/drawable_mesh_bgfx.h

Merge branch 'main' into cross_section

f9f7325

# Conflicts: # vclib/render/include/vclib/bgfx/drawable/drawable_mesh_bgfx.h

Merge branch 'main' into cross_section

d99b605

# Conflicts: # vclib/render/include/vclib/bgfx/drawable/drawable_mesh_bgfx.h

[render] Rename SECTION dimension from ENABLED/DISABLED to ON/OFF in …

b7ba307

…shaders

Merge branch 'main' into cross_section

b73a1c6

# Conflicts: # vclib/render/include/vclib/bgfx/drawable/drawable_mesh_bgfx.h

Merge branch 'main' into cross_section

fe6445e

Merge branch 'main' into cross_section

ef19c89

# Conflicts: # vclib/render/include/vclib/qt/gui/mesh_render_settings_frame.h # vclib/render/include/vclib/qt/mesh_viewer.h # vclib/render/src/vclib/qt/gui/mesh_render_settings_frame.cpp # vclib/render/src/vclib/qt/mesh_viewer.cpp

[render] Synchronize cross section settings and bounding boxes in app…

115faa8

…ly-to-all mode

Merge branch 'main' into cross_section

9473b29

[render] Add step size control for cross section precision with spin …

2ad6421

…box and logic

Merge branch 'main' into cross_section

6c7e156

[render] Add cross section support to point rendering and relevant sh…

f7debb6

…aders

Merge branch 'main' into cross_section

87de1b0

# Conflicts: # vclib/render/include/vclib/bgfx/drawable/drawable_mesh_bgfx.h # vclib/render/src/vclib/bgfx/primitives/points.cpp

Merge branch 'main' into cross_section

64985ec

# Conflicts: # vclib/render/src/vclib/qt/gui/mesh_render_settings_frame.cpp

Merge branch 'main' into cross_section

6e56429

# Conflicts: # vclib/render/src/vclib/qt/gui/mesh_render_settings_frame.cpp

[tests] add cross section tests

1e82844

Merge branch 'main' into cross_section

44c4da5

[render] using StaticUniforms for CrossSectionSettings

8f628fd

[render] cross section working on new primitive lines

28bbd62

[tests] wireframe cross section test

f29e548

[tests] fix build error

c95ce12

Merge branch 'main' into cross_section

a5d1e7e

Merge branch 'main' into cross_section

f41f7ed

# Conflicts: # vclib/render/include/vclib/bgfx/drawable/drawable_mesh_bgfx.h

Merge branch 'main' into cross_section

2b1a1b8

# Conflicts: # vclib/render/include/vclib/bgfx/drawable/drawable_mesh_bgfx.h

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Cross Section Tool for Meshes - #36

Cross Section Tool for Meshes#36
alemuntoni wants to merge 84 commits into
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alemuntoni commented Apr 15, 2026 •

edited

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alemuntoni commented Apr 15, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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Cross-section rendering support

Qt GUI integration

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alemuntoni commented Apr 15, 2026 •

edited

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