184 lines
6.5 KiB
Python
184 lines
6.5 KiB
Python
import sys
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from pprint import pprint
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from generate import renderer
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from gltf import decode_file
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from gltf import validate_mesh
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from gltf import decode_accessor
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from tree import build_tree
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def type_name(type):
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return {
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"SCALAR": "DWORD",
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"VEC2": "D3DXVECTOR2",
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"VEC3": "D3DXVECTOR3",
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"VEC4": "D3DXVECTOR4",
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# MAT2
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# MAT3
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"MAT4": "D3DXMATRIX",
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}[type]
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def float_s(f):
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return f"{f:10.7f}f"
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def sv(v, c_type):
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args = ", ".join(
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float_s(c) for c in v
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)
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return f"{c_type}({args})"
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def mv(v, c_type):
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assert len(v) == 16
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assert c_type == "D3DXMATRIX"
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v = [float_s(c) for c in v]
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return f"""
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D3DXMATRIX({v[ 0]}, {v[ 1]}, {v[ 2]}, {v[ 3]},
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{v[ 4]}, {v[ 5]}, {v[ 6]}, {v[ 7]},
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{v[ 8]}, {v[ 9]}, {v[10]}, {v[11]},
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{v[12]}, {v[13]}, {v[14]}, {v[15]})
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""".strip()
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def render_value(value, c_type):
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if "MAT" in c_type:
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return mv(value, c_type)
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elif "VEC" in c_type:
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return sv(value, c_type)
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elif type(value) in {int, float}:
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return f"{value}"
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else:
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assert False
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def render_accessors(gltf):
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for accessor_ix, accessor in enumerate(gltf.json["accessors"]):
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components = list(decode_accessor(gltf, accessor))
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accessor_name = f"accessor_{accessor_ix}"
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accessor_type = accessor['type']
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if type(components[0]) in {int, float}:
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c_type = "DWORD" if type(components[0]) is int else "float"
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else:
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c_type = type_name(accessor_type)
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yield f"const {c_type} {accessor_name}[] = {{"
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for v in components:
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yield f"{render_value(v, c_type)},"
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yield "};"
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yield f"const int {accessor_name}_length = (sizeof ({accessor_name})) / (sizeof ({accessor_name}[0]));"
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def render_meshes(gltf):
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for mesh_ix, mesh in enumerate(gltf.json["meshes"]):
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validate_mesh(gltf, mesh)
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primitive, = mesh["primitives"]
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attributes = primitive["attributes"]
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position = attributes["POSITION"]
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normal = attributes.get("NORMAL", None)
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texcoord_0 = attributes.get("TEXCOORD_0", None)
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weights_0 = attributes.get("WEIGHTS_0", None)
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joints_0 = attributes.get("JOINTS_0", None)
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indices = primitive["indices"]
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yield f"const Mesh mesh_{mesh_ix} = {{"
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yield f"accessor_{position}, // position"
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yield f"(sizeof (accessor_{position})),"
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yield f"accessor_{normal}, // normal" if normal is not None else "NULL, // normal"
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yield f"(sizeof (accessor_{normal}))," if normal is not None else "0,"
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yield f"accessor_{texcoord_0}, // texcoord_0" if texcoord_0 is not None else "NULL, // texcoord_0"
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yield f"(sizeof (accessor_{texcoord_0}))," if texcoord_0 is not None else "0,"
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yield f"accessor_{weights_0}, // weights_0" if weights_0 is not None else "NULL, // weights_0"
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yield f"(sizeof (accessor_{weights_0}))," if weights_0 is not None else "0,"
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yield f"accessor_{joints_0}, // joints_0" if joints_0 is not None else "NULL, // joints_0"
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yield f"(sizeof (accessor_{joints_0}))," if joints_0 is not None else "0,"
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yield f"accessor_{indices}, // indices"
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yield f"(sizeof (accessor_{indices})),"
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yield "};"
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def render_nodes(gltf):
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for node in gltf.json["nodes"]:
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if "skin" not in node:
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continue
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skin = node["skin"]
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yield f"extern const Skin skin_{skin};"
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node_parents = build_tree(gltf)
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for node_ix, node in enumerate(gltf.json["nodes"]):
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skin = f"&skin_{node['skin']}" if "skin" in node else "NULL"
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mesh = f"&mesh_{node['skin']}" if "mesh" in node else "NULL"
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scale = (1, 1, 1)
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translation = (0, 0, 0)
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rotation = (0, 0, 0, 1)
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if "scale" in node:
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scale = node["scale"]
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if "translation" in node:
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translation = node["translation"]
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if "rotation" in node:
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rotation = node["rotation"]
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parent_ix = node_parents.get(node_ix, -1)
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yield f"const Node node_{node_ix} = {{"
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yield f"{parent_ix}, // parent_ix"
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yield f"{skin}, // skin"
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yield f"{mesh}, // mesh"
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yield f"{render_value(translation, 'D3DXVECTOR3')}, // translation"
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yield f"{render_value(rotation, 'D3DXVECTOR4')}, // rotation"
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yield f"{render_value(scale, 'D3DXVECTOR3')}, // scale"
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yield "};"
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def render_skins(gltf):
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for skin_ix, skin in enumerate(gltf.json["skins"]):
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yield f"const Node * skin_{skin_ix}__joints[] = {{"
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for joint in skin["joints"]:
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yield f"&node_{joint},"
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yield "};"
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for skin_ix, skin in enumerate(gltf.json["skins"]):
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inverse_bind_matrices = skin["inverseBindMatrices"]
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yield f"const Skin skin_{skin_ix} = {{"
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yield f"accessor_{inverse_bind_matrices}, // inverse bind matrices"
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yield f"skin_{skin_ix}__joints, // joints"
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yield f"{len(skin['joints'])}, // joints length"
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yield "};"
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def render_animation_samplers(animation_ix, samplers):
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for sampler_ix, sampler in enumerate(samplers):
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yield f"const AnimationSampler animation_{animation_ix}__sampler_{sampler_ix} = {{"
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yield f"accessor_{sampler['input']}, // input, keyframe timestamps"
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yield f"accessor_{sampler['output']}, // output, keyframe values (void *)"
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yield f"accessor_{sampler['input']}_length, // length"
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yield "};"
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def render_animation_channels(animation_ix, channels):
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yield f"const AnimationChannel animation_{animation_ix}__channels[] = {{"
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for channel in channels:
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sampler = channel["sampler"]
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target_node = channel["target"]["node"]
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target_path = channel["target"]["path"]
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yield f"&animation_{animation_ix}__sampler_{sampler}, // animation sampler"
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yield "{"
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yield f"{target_node}, // target node index"
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yield f"ACP__{target_path.upper()}, // target path"
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yield "},"
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yield "};"
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def render_animations(gltf):
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for animation_ix, animation in enumerate(gltf.json["animations"]):
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yield from render_animation_samplers(animation_ix, animation["samplers"])
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yield from render_animation_channels(animation_ix, animation["channels"])
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def render_gltf(gltf):
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yield from render_accessors(gltf)
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yield from render_meshes(gltf)
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yield from render_nodes(gltf)
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yield from render_skins(gltf)
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yield from render_animations(gltf)
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filename = sys.argv[1]
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gltf = decode_file(filename)
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render, out = renderer()
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render(render_gltf(gltf))
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print(out.getvalue())
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