io_mesh_uv_layout/export_uv_svg.py

   1 # SPDX-License-Identifier: GPL-2.0-or-later
   2
   3 import bpy
   4 from os.path import basename
   5 from xml.sax.saxutils import escape
   6
   7
   8 def export(filepath, face_data, colors, width, height, opacity):
   9     with open(filepath, 'w', encoding='utf-8') as file:
  10         for text in get_file_parts(face_data, colors, width, height, opacity):
  11             file.write(text)
  12
  13
  14 def get_file_parts(face_data, colors, width, height, opacity):
  15     yield from header(width, height)
  16     yield from draw_polygons(face_data, width, height, opacity)
  17     yield from footer()
  18
  19
  20 def header(width, height):
  21     yield '<?xml version="1.0" standalone="no"?>\n'
  22     yield '<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" \n'
  23     yield '  "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">\n'
  24     yield f'<svg width="{width}" height="{height}" viewBox="0 0 {width} {height}"\n'
  25     yield '     xmlns="http://www.w3.org/2000/svg" version="1.1">\n'
  26     desc = f"{basename(bpy.data.filepath)}, (Blender {bpy.app.version_string})"
  27     yield f'<desc>{escape(desc)}</desc>\n'
  28
  29
  30 def draw_polygons(face_data, width, height, opacity):
  31     for uvs, color in face_data:
  32         fill = f'fill="{get_color_string(color)}"'
  33
  34         yield '<polygon stroke="black" stroke-width="1"'
  35         yield f' {fill} fill-opacity="{opacity:.2g}"'
  36
  37         yield ' points="'
  38
  39         for uv in uvs:
  40             x, y = uv[0], 1.0 - uv[1]
  41             yield f'{x*width:.3f},{y*height:.3f} '
  42         yield '" />\n'
  43
  44
  45 def get_color_string(color):
  46     r, g, b = color
  47     return f"rgb({round(r*255)}, {round(g*255)}, {round(b*255)})"
  48
  49
  50 def footer():
  51     yield '\n'
  52     yield '</svg>\n'