Leaf Generation

[GoodPie]

WIP - Exploring

[Copilot]

Pull request overview

Adds procedural leaf generation and leaf-aware export/distribution features across the C++ core, Python bindings, and Blender add-on.

Changes:

• Introduces C++ leaf generation (shape, venation, presets, LOD) with pybind11 bindings and tests.
• Adds Blender Leaf Shape node + leaf presets + upgraded leaves distribution node group (phyllotaxis, LOD, culling, billboards, normal transfer).
• Extends Pivot Painter (Unreal) export to optionally emit leaf attachment/facing textures when leaf attributes are present.

Reviewed changes

Copilot reviewed 32 out of 35 changed files in this pull request and generated 14 comments.

Show a summary per file

File	Description
tests/unit/test_leaf_shape_generator.py	Adds Python integration tests for C++ leaf generator bindings.
tests/unit/test_leaf_presets.py	Adds unit tests for Blender-side leaf preset data.
python_classes/resources/node_groups.py	Implements v2 leaves distribution node group + procedural default leaf creation.
python_classes/presets/leaf_presets.py	Adds Blender UI leaf species preset data structure.
python_classes/presets/init.py	Re-exports leaf presets/helpers.
python_classes/pivot_painter/formats/unreal.py	Adds optional leaf attachment/facing EXR export path.
python_classes/pivot_painter/exporter.py	Detects leaf attributes and enables leaf data export.
python_classes/pivot_painter/core.py	Adds computation + pixel packing helpers for leaf attachment/facing textures.
python_classes/pivot_painter/init.py	Documents new leaf textures in package docstring.
python_classes/operators.py	Adds leaves distribution options + new leaf node operators.
python_classes/nodes/tree_function_nodes/tree_mesher_node.py	Adds guard for missing trunk function.
python_classes/nodes/tree_function_nodes/leaf_shape_node.py	Adds Leaf Shape node with generation + preset application behavior.
python_classes/nodes/tree_function_nodes/init.py	Registers LeafShapeNode.
python_classes/nodes/node_categories.py	Adds Leaf category for node editor.
python_classes/mesh_utils.py	Adds support for leaf meshes + vein_distance attribute.
pyproject.toml	Bumps add-on version to 5.4.0.
m_tree/tests/main.cpp	Replaces placeholder with a custom C++ test runner + extensive leaf tests.
m_tree/source/tree/Tree.cpp	Throws when executing a tree without a trunk function.
m_tree/source/meshers/manifold_mesher/ManifoldMesher.hpp	Adds phyllotaxis_angle attribute name.
m_tree/source/meshers/manifold_mesher/ManifoldMesher.cpp	Emits phyllotaxis_angle per cross-section (golden angle progression).
m_tree/source/leaf/VenationGenerator.hpp	Adds venation generator API and spatial hash types.
m_tree/source/leaf/VenationGenerator.cpp	Implements venation generation + vein_distance attribute computation.
m_tree/source/leaf/LeafShapeGenerator.hpp	Adds leaf shape generator API (superformula/margin/venation/deformation).
m_tree/source/leaf/LeafShapeGenerator.cpp	Implements contour sampling, triangulation, UVs, venation, deformation.
m_tree/source/leaf/LeafPresets.hpp	Adds C++ leaf preset struct and enums.
m_tree/source/leaf/LeafPresets.cpp	Adds C++ preset fixtures and lookup helpers.
m_tree/source/leaf/LeafLODGenerator.hpp	Adds LOD generator API.
m_tree/source/leaf/LeafLODGenerator.cpp	Implements card mesh, billboard cloud, and impostor view directions.
m_tree/python_bindings/main.cpp	Exposes leaf APIs + mesh float-attribute helpers to Python.
m_tree/pyproject.toml	Bumps core library version to 5.4.0.
blender_manifest.toml	Bumps Blender manifest version to 5.4.0.
VERSION	Bumps repo VERSION to 5_4_0.

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[Copilot]

Pull request overview

Copilot reviewed 39 out of 42 changed files in this pull request and generated 5 comments.

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