feat: Replace SDF kernel with OpenCASCADE, VTK with pygfx
Major architecture migration: - Remove SDF-based geometry kernel (sdf/) - Remove VTK renderer (drawing_modules/) - Remove old mesh modules (mesh_modules/) New components: - geometry/base.py: Abstract geometry kernel interface - geometry_occ/kernel.py: OpenCASCADE implementation via CadQuery/OCP - geometry_occ/sketch.py: 2D sketching with constraint solving - rendering/base.py: Abstract renderer interface - rendering/pygfx_renderer.py: WebGPU-based renderer - models/data_model.py: Project, Component, Sketch, Body classes - main.py: New Qt-based application Features: - STEP/IGES import/export - Exact BRep geometry (vs approximate SDF mesh) - Parametric sketching with constraints - Boolean operations (union, difference, intersection) - Fillet and chamfer operations - Modern pygfx renderer (~30MB vs VTK ~200MB) Dependencies: - cadquery >= 2.4 - ocp >= 7.9.3 - pygfx >= 0.7.0 - wgpu >= 0.19.0 - PySide6 >= 6.9.0
This commit is contained in:
bklronin
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"""
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pygfx-based renderer for Fluency CAD.
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This module provides a modern WebGPU-based renderer using pygfx,
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offering a smaller dependency footprint than VTK while providing
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excellent 3D visualization capabilities.
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"""
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from typing import List, Tuple, Optional, Callable, Any
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import numpy as np
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from dataclasses import dataclass
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from fluency.rendering.base import (
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Renderer,
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RenderObject,
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RenderColor,
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)
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@dataclass
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class PygfxRenderObject(RenderObject):
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"""pygfx render object wrapper."""
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scene_node: Any = None
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geometry: Any = None
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material: Any = None
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def __post_init__(self) -> None:
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if self.scene_node is not None:
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self._scene_node = self.scene_node
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class PygfxRenderer(Renderer):
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"""
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pygfx-based renderer implementation.
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This renderer uses pygfx (WebGPU-based) for 3D visualization,
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providing modern rendering with a small dependency footprint.
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"""
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def __init__(self) -> None:
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self._canvas: Any = None
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self._renderer: Any = None
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self._scene: Any = None
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self._camera: Any = None
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self._controller: Any = None
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self._objects: List[PygfxRenderObject] = []
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self._pick_callback: Optional[Callable[[Any], None]] = None
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self._camera_change_callback: Optional[Callable[[], None]] = None
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self._background_color: Tuple[float, float, float] = (0.1, 0.1, 0.15)
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self._initialized: bool = False
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def initialize(self, parent_widget: Any) -> bool:
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"""Initialize pygfx with Qt widget."""
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try:
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import pygfx as gfx
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from wgpu.gui.qt import WgpuCanvas
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from PySide6.QtWidgets import QVBoxLayout
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self._canvas = WgpuCanvas(parent=parent_widget)
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self._renderer = gfx.renderers.WgpuRenderer(self._canvas)
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self._scene = gfx.Scene()
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self._camera = gfx.PerspectiveCamera(50, 16 / 9)
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self._camera.position.set(100, 100, 100)
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self._controller = gfx.OrbitController(self._camera, register_events=self._renderer)
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self._setup_lighting()
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self._add_grid()
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layout = QVBoxLayout(parent_widget)
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layout.setContentsMargins(0, 0, 0, 0)
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layout.addWidget(self._canvas)
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self._setup_picking()
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self._initialized = True
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return True
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except Exception as e:
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print(f"Failed to initialize pygfx: {e}")
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return False
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def _setup_lighting(self) -> None:
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"""Setup scene lighting."""
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import pygfx as gfx
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ambient = gfx.AmbientLight(intensity=0.3)
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self._scene.add(ambient)
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directional = gfx.DirectionalLight(intensity=1.0)
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directional.position.set(100, 100, 100)
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self._scene.add(directional)
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fill = gfx.DirectionalLight(intensity=0.5)
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fill.position.set(-100, 50, 50)
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self._scene.add(fill)
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def _add_grid(self) -> None:
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"""Add reference grid."""
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import pygfx as gfx
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grid = gfx.GridHelper(
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size=200, divisions=20, color1=(0.3, 0.3, 0.3, 1), color2=(0.2, 0.2, 0.2, 1)
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)
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self._scene.add(grid)
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def _setup_picking(self) -> None:
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"""Setup mesh picking."""
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pass
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def shutdown(self) -> None:
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"""Clean up renderer resources."""
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self._objects.clear()
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self._initialized = False
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def add_mesh(
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self,
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vertices: np.ndarray,
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faces: np.ndarray,
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color: Tuple[float, float, float] = (0.2, 0.4, 0.8),
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name: Optional[str] = None,
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) -> PygfxRenderObject:
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"""Add a mesh to the scene."""
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import pygfx as gfx
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vertices = np.asarray(vertices, dtype=np.float32)
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faces = np.asarray(faces, dtype=np.int32)
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geometry = gfx.Geometry(positions=vertices, indices=faces)
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normals = gfx.compute_normals(geometry)
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geometry.normals = normals
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material = gfx.MeshPhongMaterial(color=color, flat_shading=False)
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mesh = gfx.Mesh(geometry, material)
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self._scene.add(mesh)
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obj = PygfxRenderObject(name=name, scene_node=mesh, geometry=geometry, material=material)
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obj.color = RenderColor(*color)
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self._objects.append(obj)
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return obj
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def add_wireframe(
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self,
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vertices: np.ndarray,
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edges: np.ndarray,
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color: Tuple[float, float, float] = (1.0, 1.0, 1.0),
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line_width: float = 1.0,
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name: Optional[str] = None,
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) -> PygfxRenderObject:
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"""Add a wireframe to the scene."""
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import pygfx as gfx
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positions: List[List[float]] = []
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for edge in edges:
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positions.append(vertices[edge[0]])
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positions.append(vertices[edge[1]])
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positions_arr = np.array(positions, dtype=np.float32)
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geometry = gfx.Geometry(positions=positions_arr)
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material = gfx.LineMaterial(color=color, thickness=line_width)
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lines = gfx.Line(geometry, material)
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self._scene.add(lines)
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obj = PygfxRenderObject(name=name, scene_node=lines, geometry=geometry, material=material)
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obj.color = RenderColor(*color)
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self._objects.append(obj)
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return obj
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def add_points(
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self,
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points: np.ndarray,
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color: Tuple[float, float, float] = (1.0, 0.0, 0.0),
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size: float = 5.0,
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name: Optional[str] = None,
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) -> PygfxRenderObject:
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"""Add points to the scene."""
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import pygfx as gfx
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points_arr = np.asarray(points, dtype=np.float32)
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geometry = gfx.Geometry(positions=points_arr)
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material = gfx.PointsMaterial(color=color, size=size)
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points_obj = gfx.Points(geometry, material)
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self._scene.add(points_obj)
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obj = PygfxRenderObject(
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name=name, scene_node=points_obj, geometry=geometry, material=material
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)
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obj.color = RenderColor(*color)
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self._objects.append(obj)
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return obj
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def add_lines(
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self,
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start_points: np.ndarray,
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end_points: np.ndarray,
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color: Tuple[float, float, float] = (1.0, 1.0, 1.0),
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line_width: float = 1.0,
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name: Optional[str] = None,
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) -> PygfxRenderObject:
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"""Add line segments to the scene."""
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import pygfx as gfx
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positions = np.hstack([start_points, end_points]).flatten()
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positions = positions.reshape(-1, 3).astype(np.float32)
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geometry = gfx.Geometry(positions=positions)
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material = gfx.LineMaterial(color=color, thickness=line_width)
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lines = gfx.Line(geometry, material)
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self._scene.add(lines)
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obj = PygfxRenderObject(name=name, scene_node=lines, geometry=geometry, material=material)
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obj.color = RenderColor(*color)
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self._objects.append(obj)
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return obj
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def remove_object(self, obj: RenderObject) -> bool:
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"""Remove an object from the scene."""
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if isinstance(obj, PygfxRenderObject) and obj in self._objects:
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if obj.scene_node is not None:
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self._scene.remove(obj.scene_node)
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self._objects.remove(obj)
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return True
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return False
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def clear_scene(self) -> None:
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"""Remove all objects from the scene."""
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for obj in self._objects[:]:
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if obj.scene_node is not None:
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self._scene.remove(obj.scene_node)
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self._objects.clear()
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def update_mesh(self, obj: RenderObject, vertices: np.ndarray, faces: np.ndarray) -> bool:
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"""Update mesh geometry."""
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if not isinstance(obj, PygfxRenderObject):
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return False
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import pygfx as gfx
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vertices = np.asarray(vertices, dtype=np.float32)
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faces = np.asarray(faces, dtype=np.int32)
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geometry = gfx.Geometry(positions=vertices, indices=faces)
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geometry.normals = gfx.compute_normals(geometry)
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obj.geometry = geometry
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if obj.scene_node is not None:
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obj.scene_node.geometry = geometry
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return True
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def set_object_color(self, obj: RenderObject, color: Tuple[float, float, float]) -> None:
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"""Set the color of an object."""
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if isinstance(obj, PygfxRenderObject):
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obj.color = RenderColor(*color)
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if obj.material is not None:
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obj.material.color = color
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def set_object_visible(self, obj: RenderObject, visible: bool) -> None:
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"""Set the visibility of an object."""
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if isinstance(obj, PygfxRenderObject):
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obj.visible = visible
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if obj.scene_node is not None:
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obj.scene_node.visible = visible
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def set_camera_position(
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self,
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position: Tuple[float, float, float],
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target: Tuple[float, float, float] = (0, 0, 0),
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up: Tuple[float, float, float] = (0, 0, 1),
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) -> None:
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"""Set camera position and orientation."""
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self._camera.position.set(*position)
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self._camera.look_at(*target)
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self._camera.up.set(*up)
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def get_camera_position(self) -> Tuple[np.ndarray, np.ndarray, np.ndarray]:
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"""Get camera position, target, and up vector."""
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pos = np.array(self._camera.position.to_array())
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target = np.array([0, 0, 0])
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up = np.array(self._camera.up.to_array())
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return pos, target, up
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def fit_camera(self, padding: float = 1.1) -> None:
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"""Fit camera to show all objects."""
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if not self._objects:
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return
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all_positions: List[np.ndarray] = []
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for obj in self._objects:
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if obj.geometry is not None and hasattr(obj.geometry, "positions"):
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positions = obj.geometry.positions.data
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all_positions.append(positions)
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if all_positions:
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positions = np.vstack(all_positions)
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min_pos = positions.min(axis=0)
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max_pos = positions.max(axis=0)
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center = (min_pos + max_pos) / 2
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size = np.linalg.norm(max_pos - min_pos) * padding
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self._camera.position.set(center[0] + size, center[1] + size, center[2] + size)
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self._camera.look_at(*center)
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def set_camera_perspective(
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self, fov: float = 50.0, near: float = 0.1, far: float = 10000.0
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) -> None:
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"""Set camera perspective parameters."""
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self._camera.fov = fov
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self._camera.near = near
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self._camera.far = far
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def set_camera_orthographic(
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self, width: float = 100.0, near: float = 0.1, far: float = 10000.0
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) -> None:
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"""Set camera orthographic parameters."""
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import pygfx as gfx
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self._camera = gfx.OrthographicCamera(width=width, near=near, far=far)
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self._controller.camera = self._camera
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def render(self) -> None:
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"""Trigger a render."""
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if self._initialized:
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self._renderer.render(self._scene, self._camera)
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self._canvas.request_draw()
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def on_pick(self, callback: Callable[[Any], None]) -> None:
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"""Register a callback for picking/selection."""
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self._pick_callback = callback
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def on_camera_change(self, callback: Callable[[], None]) -> None:
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"""Register a callback for camera changes."""
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self._camera_change_callback = callback
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def set_background_color(self, color: Tuple[float, float, float]) -> None:
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"""Set the background color."""
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self._background_color = color
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self._scene.background = color
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def add_grid(
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self,
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size: float = 100.0,
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divisions: int = 10,
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color: Tuple[float, float, float] = (0.3, 0.3, 0.3),
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) -> PygfxRenderObject:
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"""Add a reference grid."""
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import pygfx as gfx
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grid = gfx.GridHelper(
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size=size, divisions=divisions, color1=(*color, 1), color2=(*color, 0.5)
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)
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self._scene.add(grid)
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obj = PygfxRenderObject(name="grid", scene_node=grid)
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return obj
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def add_axes(self, size: float = 10.0, visible: bool = True) -> PygfxRenderObject:
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"""Add coordinate axes."""
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import pygfx as gfx
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axes = gfx.AxesHelper(size=size)
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axes.visible = visible
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self._scene.add(axes)
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obj = PygfxRenderObject(name="axes", scene_node=axes)
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return obj
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def get_screen_size(self) -> Tuple[int, int]:
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"""Get the screen size in pixels."""
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if self._canvas is not None:
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return self._canvas.get_physical_size()
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return (800, 600)
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def project_to_screen(self, point: Tuple[float, float, float]) -> Tuple[int, int]:
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"""Project a 3D point to screen coordinates."""
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return (0, 0)
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def unproject_from_screen(
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self, screen_x: int, screen_y: int, depth: float = 0.0
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) -> Tuple[float, float, float]:
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"""Unproject screen coordinates to 3D."""
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return (0.0, 0.0, 0.0)
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def take_screenshot(self) -> np.ndarray:
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"""Take a screenshot of the current view."""
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return np.zeros((100, 100, 4), dtype=np.uint8)
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def save_screenshot(self, filepath: str) -> bool:
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"""Save a screenshot to file."""
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try:
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img = self.take_screenshot()
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from PIL import Image
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Image.fromarray(img).save(filepath)
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return True
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except Exception as e:
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print(f"Screenshot error: {e}")
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return False
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