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Copy pathMeshExporter.py
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56 lines (43 loc) · 1.67 KB
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from __future__ import annotations
from typing import TYPE_CHECKING, List, Optional
from ..helpers.MeshHelper import MeshHandler
if TYPE_CHECKING:
from ..classes.generated import Mesh
def export_mesh(m_Mesh: Mesh, format: str = "obj") -> str:
if format == "obj":
return export_mesh_obj(m_Mesh)
raise NotImplementedError(f"Export format {format} not implemented")
def export_mesh_obj(mesh: Mesh, material_names: Optional[List[str]] = None) -> str:
handler = MeshHandler(mesh)
handler.process()
m_Mesh = handler
if m_Mesh.m_VertexCount <= 0:
return False
sb = [f"g {mesh.m_Name}\n"]
if material_names:
sb.append(f"mtllib {mesh.m_Name}.mtl\n")
# region Vertices
if not m_Mesh.m_Vertices:
return False
sb.extend(
"v {0:.9G} {1:.9G} {2:.9G}\n".format(-pos[0], pos[1], pos[2]).replace("nan", "0") for pos in m_Mesh.m_Vertices
)
# endregion
# region UV
if m_Mesh.m_UV0:
sb.extend("vt {0:.9G} {1:.9G}\n".format(uv[0], uv[1]).replace("nan", "0") for uv in m_Mesh.m_UV0)
# endregion
# region Normals
if m_Mesh.m_Normals:
sb.extend(
"vn {0:.9G} {1:.9G} {2:.9G}\n".format(-n[0], n[1], n[2]).replace("nan", "0") for n in m_Mesh.m_Normals
)
# endregion
# region Face
for i, triangles in enumerate(m_Mesh.get_triangles()):
sb.append(f"g {mesh.m_Name}_{i}\n")
if material_names and i < len(material_names) and material_names[i]:
sb.append(f"usemtl {material_names[i]}\n")
sb.extend("f {0}/{0}/{0} {1}/{1}/{1} {2}/{2}/{2}\n".format(c + 1, b + 1, a + 1) for a, b, c in triangles)
# endregion
return "".join(sb)