Created
November 29, 2023 16:12
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Using https://gltf.report and switching to the script tab (<> symbol on the left), the following script can be used to identify what kind of data the accessors from the error message hold.
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| const root = document.getRoot(); | |
| // Get all accessors in the document | |
| const accessors = document.getRoot().listAccessors(); | |
| // Loop through each accessor | |
| for (let accessorIndex = 0; accessorIndex < accessors.length; accessorIndex++) { | |
| const accessor = accessors[accessorIndex]; | |
| // Find where the accessor is used | |
| const usedAs = findAccessorUsage(accessor); | |
| // Log information about the accessor | |
| console.log(`Accessor ${accessorIndex}:`); | |
| console.log(`- Data Type: ${accessor.getType()}`); | |
| console.log(`- Component Type: ${accessor.getComponentType()}`); | |
| console.log(`- Count: ${accessor.getCount()}`); | |
| if (Object.keys(usedAs).length > 0 && usedAs.constructor === Object) { | |
| console.log('- Used in:'); | |
| for (const [key, purpose] of Object.entries(usedAs)) { | |
| console.log(` - ${key}: ${purpose}`); | |
| } | |
| } else { | |
| console.log('- Usage not identified.'); | |
| } | |
| //console.log(accessor) // Uncomment for debugging | |
| console.log(''); // Add a newline for better readability | |
| } | |
| // Function to find where an accessor is used | |
| function findAccessorUsage(accessor) { | |
| const usedAs = {}; | |
| const meshes = root.listMeshes(); | |
| for (const mesh of meshes) { | |
| // Assume single primitive | |
| const prim0 = mesh.listPrimitives()[0]; | |
| const indices = prim0.getIndices(); | |
| if (indices.equals(accessor)) { | |
| usedAs[`Mesh ${mesh.getName()}`] = 'Vertex indices to form triangles'; | |
| break; | |
| } | |
| const attributes = prim0.listAttributes(); | |
| const semantics = prim0.listSemantics(); // matches attributes' order | |
| for (let attributeIdx = 0; attributeIdx < attributes.length; attributeIdx++) { | |
| if (attributes[attributeIdx].equals(accessor)) { | |
| usedAs[`Mesh ${mesh.getName()}`] = semantics[attributeIdx]; | |
| } | |
| } | |
| } | |
| const animations = root.listAnimations(); | |
| for (const animation of animations) { | |
| const sampler = animation.listSamplers().find(s => s.getInput().equals(accessor) || s.getOutput().equals(accessor)); | |
| if (sampler) { | |
| usedAs[`Animation ${animation.getName()}`] = 'sampler'; | |
| } | |
| } | |
| const skins = root.listSkins(); | |
| for (const skin of skins) { | |
| if (skin.getInverseBindMatrices().equals(accessor)) { | |
| usedAs['Skin'] = 'InverseBindMatrices for skinning'; | |
| } | |
| } | |
| return usedAs; | |
| } |
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