79 lines
2.1 KiB
Python
79 lines
2.1 KiB
Python
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"""
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This script generates the skydome geometry data as stored in
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iron/Sources/iron/data/ConstData.hx.
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USAGE:
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On MacOS/Linux:
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Open Blender from the terminal to see the console output.
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On Windows:
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Open the Blender console via "Window > Toggle System Console".
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Select the skydome object in object mode and run this script. Note
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that the script flips the normals in the output. The original mesh
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is not modified.
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After running the script, open the console. If the script ran
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successfully, the generated vertex data was printed to the console,
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ready to copy to ConstData.hx.
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"""
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import bmesh
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import bpy
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def list_representation(lst) -> str:
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"""List to string without spaces."""
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return f"[{','.join(str(i) for i in lst)}]"
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def run():
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obj = bpy.context.object
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if obj is None:
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print("No object selected, aborting!")
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return
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if obj.type != "MESH":
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print(f"Selected object '{obj.name}' is not a mesh, aborting!")
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return
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bm = bmesh.new()
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bm.from_mesh(obj.data)
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bmesh.ops.triangulate(bm, faces=bm.faces[:], quad_method="FIXED")
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indices = []
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positions = []
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normals = []
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# Fill index buffer
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for face in bm.faces:
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# Turn the normals inside for correct winding order of indices
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face.normal_flip()
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for vert in face.verts:
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indices.append(vert.index)
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# Vertex buffer data
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for vert in bm.verts:
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positions.extend(vert.co)
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# Blender world normals have mirrored coords compared to spheres
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nor = vert.normal
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nor.negate()
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normals.extend(nor)
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pos_rounded = [round(elem, 5) for elem in positions]
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nor_rounded = [round(elem, 5) for elem in normals]
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bm.free()
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print("\n====================")
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print(f"Calculated mesh data for object '{obj.name}':")
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print(f"Indices: {list_representation(indices)}")
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print("")
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print(f"Positions: {list_representation(pos_rounded)}")
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print("")
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print(f"Normals: {list_representation(nor_rounded)}")
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if __name__ == "__main__":
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run()
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