e955c94ed3
Listing the "Blender Foundation" as copyright holder implied the Blender Foundation holds copyright to files which may include work from many developers. While keeping copyright on headers makes sense for isolated libraries, Blender's own code may be refactored or moved between files in a way that makes the per file copyright holders less meaningful. Copyright references to the "Blender Foundation" have been replaced with "Blender Authors", with the exception of `./extern/` since these this contains libraries which are more isolated, any changed to license headers there can be handled on a case-by-case basis. Some directories in `./intern/` have also been excluded: - `./intern/cycles/` it's own `AUTHORS` file is planned. - `./intern/opensubdiv/`. An "AUTHORS" file has been added, using the chromium projects authors file as a template. Design task: #110784 Ref !110783.
147 lines
3.8 KiB
Python
147 lines
3.8 KiB
Python
# SPDX-FileCopyrightText: 2023 Blender Authors
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#
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# SPDX-License-Identifier: Apache-2.0
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'''
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Created compact byte arrays which can be decoded into 2D shapes.
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(See 'GPU_batch_from_poly_2d_encoded').
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- Objects must use the prefix "shape_"
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- Meshes and Curves are supported as input.
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- C and Python output is written to "output/"
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The format is simple: a series of (X, Y) locations one byte each.
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Repeating the same value terminates the polygon, moving onto the next.
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Example Use::
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blender.bin -b --factory-startup my_shapes.blend --python make_shape_2d_from_blend.py
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'''
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import bpy
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import os
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USE_C_STYLE = True
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USE_PY_STYLE = True
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WRAP_LIMIT = 79
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TAB_WIDTH = 4
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SUBDIR = "output"
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def float_to_ubyte(f):
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return max(0, min(255, int(round(f * 255.0))))
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def curve_to_loops(ob):
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import bmesh
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cu = ob.data
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me = ob.to_mesh()
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bm = bmesh.new()
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bm.from_mesh(me)
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me = ob.to_mesh_clear()
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bmesh.ops.beautify_fill(bm, faces=bm.faces, edges=bm.edges)
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edges = bm.edges[:]
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edges.sort(key=lambda e: e.calc_length(), reverse=True)
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for e in edges:
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if e.is_manifold:
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f_a, f_b = [f for f in e.link_faces]
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bmesh.utils.face_join((f_a, f_b), False)
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edges = bm.edges[:]
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for e in edges:
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if e.is_wire:
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bm.edges.remove(e)
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bm.normal_update()
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data_all = []
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for f in bm.faces:
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points = []
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# Ensure all faces are pointing the correct direction
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# Note, we may want to use polygon sign for a second color
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# (via the material index).
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if f.normal.z > 0.0:
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loops = f.loops
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else:
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loops = reversed(f.loops)
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for l in loops:
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points.append(
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tuple(float_to_ubyte(axis) for axis in l.vert.co.xy)
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)
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data_all.append((points, f.material_index))
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bm.free()
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return data_all
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def write_c(ob):
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cu = ob.data
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name = ob.name
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with open(os.path.join(SUBDIR, name + ".c"), 'w') as fh:
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fw = fh.write
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fw(f"/* {name} */\n")
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fw(f"const uchar {name}[] = {{")
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line_len = WRAP_LIMIT
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line_is_first = True
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array_len = 0
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data_all = curve_to_loops(ob)
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for (points, material_index) in data_all:
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# TODO, material_index
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for p in points + [points[-1]]:
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line_len += 12
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if line_len >= WRAP_LIMIT:
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fw("\n\t")
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line_len = TAB_WIDTH
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line_is_first = True
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if not line_is_first:
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fw(" ")
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fw(", ".join([f"0x{axis:02x}" for axis in p]) + ",")
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line_is_first = False
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array_len += (len(points) + 1) * 2
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fw("\n};\n")
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# fw(f"const int data_len = {array_len}\n")
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def write_py(ob):
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cu = ob.data
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name = ob.name
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with open(os.path.join(SUBDIR, name + ".py"), 'w') as fh:
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fw = fh.write
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fw(f"# {name}\n")
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fw("data = (")
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line_len = WRAP_LIMIT
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fw = fh.write
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data_all = curve_to_loops(ob)
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for (points, material_index) in data_all:
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# TODO, material_index
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for p in points + [points[-1]]:
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line_len += 8
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if line_len >= WRAP_LIMIT:
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if p is not points[0]:
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fw("'")
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fw("\n b'")
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line_len = 6
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fw("".join([f"\\x{axis:02x}" for axis in p]))
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fw("'\n)\n")
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def main():
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os.makedirs(SUBDIR, exist_ok=True)
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for ob in bpy.data.objects:
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if ob.type not in {'MESH', 'CURVE'}:
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continue
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if not ob.name.startswith('shape_'):
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continue
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if USE_C_STYLE:
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write_c(ob)
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if USE_PY_STYLE:
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write_py(ob)
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if __name__ == "__main__":
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main()
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