| from __future__ import annotations |
|
|
| import os |
| import subprocess |
| import sys |
| import tempfile |
| from pathlib import Path |
|
|
| import gradio as gr |
| import numpy as np |
| import spaces |
| import trimesh |
|
|
| from sphereparam import ( |
| REPO_ROOT, |
| check_tools, |
| compute_spherical_parameterization, |
| load_mesh, |
| normalize_for_display, |
| required_tools, |
| sphere_to_uv, |
| uv_xy_colors, |
| ) |
|
|
|
|
| EXAMPLE_MESH = REPO_ROOT / "demos" / "data" / "bunny.orig.m" |
| MAX_VERTICES = int(os.environ.get("SPHEREPARAM_MAX_VERTICES", "50000")) |
|
|
|
|
| def ensure_executable_permissions() -> None: |
| for path in [ |
| REPO_ROOT / "demos" / "bin" / "meshtopm.sh", |
| REPO_ROOT / "bin" / "unix" / "MeshSimplify", |
| REPO_ROOT / "bin" / "unix" / "reverselines", |
| REPO_ROOT / "bin" / "unix" / "Filterprog", |
| REPO_ROOT / "bin" / "unix" / "SphereParam", |
| ]: |
| if path.exists(): |
| path.chmod(path.stat().st_mode | 0o755) |
|
|
|
|
| def ensure_native_tools() -> None: |
| ensure_executable_permissions() |
| try: |
| check_tools() |
| return |
| except FileNotFoundError: |
| pass |
|
|
| env = os.environ.copy() |
| env["PYTHON_BIN"] = sys.executable |
| subprocess.run(["bash", str(REPO_ROOT / "compile.sh")], cwd=REPO_ROOT, check=True, env=env) |
| ensure_executable_permissions() |
| check_tools() |
|
|
|
|
| def rgba_colors(rgb: np.ndarray) -> np.ndarray: |
| rgb255 = np.clip(np.asarray(rgb) * 255.0, 0, 255).astype(np.uint8) |
| alpha = np.full((len(rgb255), 1), 255, dtype=np.uint8) |
| return np.column_stack([rgb255, alpha]) |
|
|
|
|
| def export_glb(path: Path, vertices: np.ndarray, faces: np.ndarray, colors: np.ndarray) -> Path: |
| mesh = trimesh.Trimesh(vertices=vertices, faces=faces, process=False) |
| mesh.visual.vertex_colors = rgba_colors(colors) |
| mesh.export(path) |
| return path |
|
|
|
|
| def export_scene_glb( |
| path: Path, |
| mesh_vertices: np.ndarray, |
| sphere_vertices: np.ndarray, |
| faces: np.ndarray, |
| colors: np.ndarray, |
| ) -> Path: |
| scene = trimesh.Scene() |
| original = trimesh.Trimesh(vertices=mesh_vertices + np.array([-1.35, 0.0, 0.0]), faces=faces, process=False) |
| original.visual.vertex_colors = rgba_colors(colors) |
| sphere = trimesh.Trimesh(vertices=sphere_vertices + np.array([1.35, 0.0, 0.0]), faces=faces, process=False) |
| sphere.visual.vertex_colors = rgba_colors(colors) |
| scene.add_geometry(original, node_name="input mesh") |
| scene.add_geometry(sphere, node_name="sphere") |
| scene.export(path) |
| return path |
|
|
|
|
| @spaces.GPU(duration=120) |
| def parameterize(mesh_file: str, effort: int, base_faces: int, threads: int) -> tuple[str, str, str, str, str]: |
| if not mesh_file: |
| raise gr.Error("Upload a closed triangular genus-0 mesh first.") |
|
|
| mesh_path = Path(mesh_file) |
| ensure_native_tools() |
|
|
| vertices, faces = load_mesh(mesh_path) |
| if len(vertices) > MAX_VERTICES: |
| raise gr.Error( |
| f"This demo is capped at {MAX_VERTICES:,} vertices; uploaded mesh has {len(vertices):,}." |
| ) |
|
|
| base_faces_arg = None if int(base_faces) <= 0 else int(base_faces) |
| threads_arg = None if int(threads) <= 0 else int(threads) |
| sphere_vertices = compute_spherical_parameterization( |
| vertices, |
| faces, |
| effort=int(effort), |
| base_faces=base_faces_arg, |
| threads=threads_arg, |
| verbose=False, |
| ) |
|
|
| uv = sphere_to_uv(sphere_vertices) |
| colors = uv_xy_colors(uv) |
| display_vertices = normalize_for_display(vertices) |
|
|
| out_dir = Path(tempfile.mkdtemp(prefix="sphereparam_space_")) |
| npz_path = out_dir / f"{mesh_path.stem}_sphereparam.npz" |
| np.savez_compressed( |
| npz_path, |
| vertices=vertices, |
| faces=faces, |
| sphere_vertices=sphere_vertices, |
| uv=uv, |
| source_mesh=str(mesh_path), |
| effort=int(effort), |
| base_faces=-1 if base_faces_arg is None else base_faces_arg, |
| ) |
|
|
| original_glb = export_glb(out_dir / "input_uv_colored.glb", display_vertices, faces, colors) |
| sphere_glb = export_glb(out_dir / "sphere_uv_colored.glb", sphere_vertices, faces, colors) |
| comparison_glb = export_scene_glb(out_dir / "input_and_sphere.glb", display_vertices, sphere_vertices, faces, colors) |
|
|
| status = ( |
| f"Done: {len(vertices):,} vertices, {len(faces):,} faces. " |
| "Colors encode spherical UV coordinates and are shared between the input mesh and sphere." |
| ) |
| return str(comparison_glb), str(original_glb), str(sphere_glb), str(npz_path), status |
|
|
|
|
| def available_tools_status() -> str: |
| tools = required_tools() |
| present = [name for name, path in tools.items() if path.exists()] |
| missing = [name for name, path in tools.items() if not path.exists()] |
| if not missing: |
| return "Native tools are compiled and ready." |
| return "Native tools will compile on first run. Missing now: " + ", ".join(missing) |
|
|
|
|
| with gr.Blocks(title="Spherical Parameterization") as demo: |
| gr.Markdown( |
| "# Spherical Parameterization\n" |
| "Upload a closed genus-0 triangle mesh, run Hoppe/Praun spherical parameterization, " |
| "and inspect the UV-colored mesh and sphere as GLB previews." |
| ) |
|
|
| with gr.Row(): |
| with gr.Column(scale=1): |
| mesh_input = gr.File( |
| label="Mesh", |
| file_types=[".m", ".ply", ".obj", ".off", ".stl", ".glb", ".gltf"], |
| type="filepath", |
| ) |
| effort = gr.Slider(0, 5, value=2, step=1, label="Effort") |
| base_faces = gr.Number(value=0, precision=0, label="Base faces, 0 for default") |
| threads = gr.Number(value=0, precision=0, label="Threads, 0 for default") |
| run = gr.Button("Parameterize", variant="primary") |
| status = gr.Textbox(label="Status", value=available_tools_status(), interactive=False) |
| npz_output = gr.File(label="Download .npz") |
| with gr.Column(scale=2): |
| comparison = gr.Model3D(label="Input and sphere") |
|
|
| with gr.Row(): |
| original = gr.Model3D(label="Input mesh") |
| sphere = gr.Model3D(label="Sphere") |
|
|
| gr.Examples( |
| examples=[[str(EXAMPLE_MESH), 2, 0, 0]], |
| inputs=[mesh_input, effort, base_faces, threads], |
| ) |
|
|
| run.click( |
| parameterize, |
| inputs=[mesh_input, effort, base_faces, threads], |
| outputs=[comparison, original, sphere, npz_output, status], |
| ) |
|
|
|
|
| if __name__ == "__main__": |
| demo.launch(server_name=os.environ.get("GRADIO_SERVER_NAME", "0.0.0.0")) |
|
|
