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add weight and joint accessors

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This commit is contained in:
Zack Buhman 2026-01-03 16:21:14 -06:00
parent ee4deb53fb
commit 862b4e308f
1 changed files with 18 additions and 5 deletions
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23
render_cpp.py
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@ -75,12 +75,23 @@ def render_meshes(gltf):
position = attributes["POSITION"]
normal = attributes.get("NORMAL", None)
texcoord_0 = attributes.get("TEXCOORD_0", None)
weights_0 = attributes.get("WEIGHTS_0", None)
joints_0 = attributes.get("JOINTS_0", None)
indices = primitive["indices"]
yield f"const Mesh mesh_{mesh_ix} = {{"
yield f"accessor_{position}, // position"
yield f"accessor_{normal}, // normal" if normal is not None else "NULL,"
yield f"accessor_{texcoord_0}, // texcoord_0" if texcoord_0 is not None else "NULL,"
yield f"(sizeof (accessor_{position})),"
yield f"accessor_{normal}, // normal" if normal is not None else "NULL, // normal"
yield f"(sizeof (accessor_{normal}))," if normal is not None else "0,"
yield f"accessor_{texcoord_0}, // texcoord_0" if texcoord_0 is not None else "NULL, // texcoord_0"
yield f"(sizeof (accessor_{texcoord_0}))," if texcoord_0 is not None else "0,"
yield f"accessor_{weights_0}, // weights_0" if weights_0 is not None else "NULL, // weights_0"
yield f"(sizeof (accessor_{weights_0}))," if weights_0 is not None else "0,"
yield f"accessor_{joints_0}, // joints_0" if joints_0 is not None else "NULL, // joints_0"
yield f"(sizeof (accessor_{joints_0}))," if joints_0 is not None else "0,"
yield f"accessor_{indices}, // indices"
yield f"(sizeof (accessor_{indices})),"
yield "};"
def render_nodes(gltf):
@ -88,7 +99,7 @@ def render_nodes(gltf):
if "skin" not in node:
continue
skin = node["skin"]
yield f"const Skin skin_{skin};"
yield f"extern const Skin skin_{skin};"
for node_ix, node in enumerate(gltf.json["nodes"]):
skin = f"&skin_{node['skin']}" if "skin" in node else "NULL"
@ -107,9 +118,9 @@ def render_nodes(gltf):
yield f"const Node node_{node_ix} = {{"
yield f"{skin}, // skin"
yield f"{mesh}, // mesh"
yield f"{render_value(scale, 'D3DXVECTOR3')}, // scale"
yield f"{render_value(translation, 'D3DXVECTOR3')}, // translation"
yield f"{render_value(rotation, 'D3DXVECTOR4')}, // rotation"
yield f"{render_value(scale, 'D3DXVECTOR3')}, // scale"
yield "};"
def render_skins(gltf):
@ -123,7 +134,8 @@ def render_skins(gltf):
inverse_bind_matrices = skin["inverseBindMatrices"]
yield f"const Skin skin_{skin_ix} = {{"
yield f"accessor_{inverse_bind_matrices}, // inverse bind matrices"
yield f"{{ skin_{skin_ix}__joints, {len(skin['joints'])} }},"
yield f"skin_{skin_ix}__joints, // joints"
yield f"{len(skin['joints'])}, // joints length"
yield "};"
def render_animation_samplers(animation_ix, samplers):
@ -131,6 +143,7 @@ def render_animation_samplers(animation_ix, samplers):
yield f"const AnimationSampler animation_{animation_ix}__sampler_{sampler_ix} = {{"
yield f"accessor_{sampler['input']}, // input, keyframe timestamps"
yield f"accessor_{sampler['output']}, // output, keyframe values (void *)"
yield f"accessor_{sampler['input']}_length, // length"
yield "};"