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restore support for non-animated meshes

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This commit is contained in:
Zack Buhman 2026-01-08 19:18:50 -06:00
parent 34868d4188
commit a94b3044b0
2 changed files with 16 additions and 2 deletions
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11
render_cpp.py
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@ -119,7 +119,7 @@ def render_nodes(gltf):
print(f"mesh node {node_ix}", file=sys.stderr) print(f"mesh node {node_ix}", file=sys.stderr)
skin = f"&skin_{node['skin']}" if "skin" in node else "NULL" skin = f"&skin_{node['skin']}" if "skin" in node else "NULL"
mesh = f"&mesh_{node['skin']}" if "mesh" in node else "NULL" mesh = f"&mesh_{node['mesh']}" if "mesh" in node else "NULL"
scale = (1, 1, 1) scale = (1, 1, 1)
translation = (0, 0, 0) translation = (0, 0, 0)
@ -154,6 +154,9 @@ def render_nodes_extern(gltf):
yield f'const int nodes__length = {len(gltf.json["nodes"])};' yield f'const int nodes__length = {len(gltf.json["nodes"])};'
def render_skins(gltf): def render_skins(gltf):
if "skins" not in gltf.json:
return
for skin_ix, skin in enumerate(gltf.json["skins"]): for skin_ix, skin in enumerate(gltf.json["skins"]):
yield f"const int skin_{skin_ix}__joints[] = {{" yield f"const int skin_{skin_ix}__joints[] = {{"
for joint in skin["joints"]: for joint in skin["joints"]:
@ -169,6 +172,8 @@ def render_skins(gltf):
yield "};" yield "};"
def render_skins_extern(gltf): def render_skins_extern(gltf):
if "skins" not in gltf.json:
return
for skin_ix, skin in enumerate(gltf.json["skins"]): for skin_ix, skin in enumerate(gltf.json["skins"]):
yield f"const int skin_{skin_ix}__joints__length = {len(skin['joints'])};" yield f"const int skin_{skin_ix}__joints__length = {len(skin['joints'])};"
@ -194,12 +199,16 @@ def render_animation_channels(animation_ix, channels):
yield "};" yield "};"
def render_animations_extern(animation_ix): def render_animations_extern(animation_ix):
if "animations" not in gltf.json:
return
for animation_ix, animation in enumerate(gltf.json["animations"]): for animation_ix, animation in enumerate(gltf.json["animations"]):
yield f"extern const AnimationChannel animation_{animation_ix}__channels[];" yield f"extern const AnimationChannel animation_{animation_ix}__channels[];"
length = len(animation["channels"]) length = len(animation["channels"])
yield f"const int animation_{animation_ix}__channels__length = {length};" yield f"const int animation_{animation_ix}__channels__length = {length};"
def render_animations(gltf): def render_animations(gltf):
if "animations" not in gltf.json:
return
for animation_ix, animation in enumerate(gltf.json["animations"]): for animation_ix, animation in enumerate(gltf.json["animations"]):
yield from render_animation_samplers(animation_ix, animation["samplers"]) yield from render_animation_samplers(animation_ix, animation["samplers"])
yield from render_animation_channels(animation_ix, animation["channels"]) yield from render_animation_channels(animation_ix, animation["channels"])

7
tree.py
View File

@ -11,6 +11,10 @@ def linearize_tree(node_ix, nodes):
def build_tree(gltf): def build_tree(gltf):
parents = {} # from child to parent parents = {} # from child to parent
# fixme: hack
if len(gltf.json["nodes"]) == 1:
return {}, [0]
for node_ix, node in enumerate(gltf.json["nodes"]): for node_ix, node in enumerate(gltf.json["nodes"]):
if "children" not in node: if "children" not in node:
continue continue
@ -18,7 +22,8 @@ def build_tree(gltf):
assert child_ix not in parents assert child_ix not in parents
parents[child_ix] = node_ix parents[child_ix] = node_ix
root_node_ix, = [i for i in parents.values() if i not in parents] root_node_ix, = set(i for i in parents.values() if i not in parents)
print(root_node_ix)
traversal_order = list(linearize_tree(root_node_ix, gltf.json["nodes"])) traversal_order = list(linearize_tree(root_node_ix, gltf.json["nodes"]))
return parents, traversal_order return parents, traversal_order