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155 provide example for the material mapping #156
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230cacd
Add example fr material assignment and mapping
ClemensLinnhoff c51c068
Add readme explaining the examples
ClemensLinnhoff 03e08c5
Fix asset and material file
ClemensLinnhoff e760bdf
Fix object class
ClemensLinnhoff f64bfe4
Add uri to mapping file
ClemensLinnhoff 595c768
Add further description
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,18 @@ | ||
| # Examples | ||
|
|
||
| This folder contains examples for all file formats defined in ASAM OpenMATERIAL. | ||
| This showcases the usage of asset files alongside a 3D model file, the material assignment via mesh or texture, the mapping to material property files als well as the definition of specific property look-up tables. | ||
|
|
||
| | File Name | Description | | ||
| |--------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------| | ||
| | `checker.png` | Visual texture used in the 3D model. | | ||
| | `checker_xom.png` | ASAM OpenMATERIAL assignment texture used to assign different materials to certain parts of the object (texture-based material assignment). | | ||
| | `example_asset.gltf/bin` | 3D model file in glTF format, representing the 3D geometry. | | ||
| | `example_asset.xoma` | ASAM OpenMATERIAL asset file (.xoma), containing asset metadata and the link to the assignment texture. | | ||
| | `example_mapping.xomm` | Material mapping file (.xomm), providing mappings for different material definitions, per mesh or texture color value. | | ||
| | `example_material.xomp` | ASAM OpenMATERIAL material property file (.xomp), defining core material characteristics. | | ||
| | `example_material_2.xomp` | Second example of an ASAM OpenMATERIAL material property file to showcase the mapping of multiple materials. | | ||
| | `example_material_emp.xompt` | Material property look-up table (.xompt), containing electromagnetic properties. | | ||
| | `example_material_camera_brdf.xompt` | Material property look-up table (.xompt), containing BRDF data specific to camera sensors. | | ||
| | `example_material_lidar_brdf.xompt` | Material property look-up table (.xompt), containing BRDF data specific to lidar sensors. | | ||
| | `example_material_radar_brdf.xompt` | Material property look-up table (.xompt), containing BRDF data specific to radar sensors. | |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,218 @@ | ||
| { | ||
| "asset":{ | ||
| "generator":"Khronos glTF Blender I/O v4.2.57", | ||
| "version":"2.0" | ||
| }, | ||
| "scene":0, | ||
| "scenes":[ | ||
| { | ||
| "name":"Scene", | ||
| "nodes":[ | ||
| 0 | ||
| ] | ||
| } | ||
| ], | ||
| "nodes":[ | ||
| { | ||
| "mesh":0, | ||
| "name":"Cube" | ||
| } | ||
| ], | ||
| "materials":[ | ||
| { | ||
| "doubleSided":true, | ||
| "name":"Material_Cube", | ||
| "pbrMetallicRoughness":{ | ||
| "baseColorTexture":{ | ||
| "index":0 | ||
| }, | ||
| "metallicFactor":0, | ||
| "roughnessFactor":0.5 | ||
| } | ||
| }, | ||
| { | ||
| "doubleSided":true, | ||
| "name":"Material_Sphere", | ||
| "pbrMetallicRoughness":{ | ||
| "baseColorFactor":[ | ||
| 0.800000011920929, | ||
| 0.800000011920929, | ||
| 0.800000011920929, | ||
| 1 | ||
| ], | ||
| "metallicFactor":0, | ||
| "roughnessFactor":0.5 | ||
| } | ||
| } | ||
| ], | ||
| "meshes":[ | ||
| { | ||
| "name":"Cube", | ||
| "primitives":[ | ||
| { | ||
| "attributes":{ | ||
| "POSITION":0, | ||
| "NORMAL":1, | ||
| "TEXCOORD_0":2 | ||
| }, | ||
| "indices":3, | ||
| "material":0 | ||
| }, | ||
| { | ||
| "attributes":{ | ||
| "POSITION":4, | ||
| "NORMAL":5, | ||
| "TEXCOORD_0":6 | ||
| }, | ||
| "indices":7, | ||
| "material":1 | ||
| } | ||
| ] | ||
| } | ||
| ], | ||
| "textures":[ | ||
| { | ||
| "sampler":0, | ||
| "source":0 | ||
| } | ||
| ], | ||
| "images":[ | ||
| { | ||
| "mimeType":"image/png", | ||
| "name":"Asset 1", | ||
| "uri":"checker.png" | ||
| } | ||
| ], | ||
| "accessors":[ | ||
| { | ||
| "bufferView":0, | ||
| "componentType":5126, | ||
| "count":16, | ||
| "max":[ | ||
| 1, | ||
| 2, | ||
| 1 | ||
| ], | ||
| "min":[ | ||
| -1, | ||
| 0, | ||
| -1 | ||
| ], | ||
| "type":"VEC3" | ||
| }, | ||
| { | ||
| "bufferView":1, | ||
| "componentType":5126, | ||
| "count":16, | ||
| "type":"VEC3" | ||
| }, | ||
| { | ||
| "bufferView":2, | ||
| "componentType":5126, | ||
| "count":16, | ||
| "type":"VEC2" | ||
| }, | ||
| { | ||
| "bufferView":3, | ||
| "componentType":5123, | ||
| "count":42, | ||
| "type":"SCALAR" | ||
| }, | ||
| { | ||
| "bufferView":4, | ||
| "componentType":5126, | ||
| "count":296, | ||
| "max":[ | ||
| 0.999999463558197, | ||
| 3, | ||
| 0.9999994039535522 | ||
| ], | ||
| "min":[ | ||
| -0.9999992847442627, | ||
| 2, | ||
| -0.9999986886978149 | ||
| ], | ||
| "type":"VEC3" | ||
| }, | ||
| { | ||
| "bufferView":5, | ||
| "componentType":5126, | ||
| "count":296, | ||
| "type":"VEC3" | ||
| }, | ||
| { | ||
| "bufferView":6, | ||
| "componentType":5126, | ||
| "count":296, | ||
| "type":"VEC2" | ||
| }, | ||
| { | ||
| "bufferView":7, | ||
| "componentType":5123, | ||
| "count":1440, | ||
| "type":"SCALAR" | ||
| } | ||
| ], | ||
| "bufferViews":[ | ||
| { | ||
| "buffer":0, | ||
| "byteLength":192, | ||
| "byteOffset":0, | ||
| "target":34962 | ||
| }, | ||
| { | ||
| "buffer":0, | ||
| "byteLength":192, | ||
| "byteOffset":192, | ||
| "target":34962 | ||
| }, | ||
| { | ||
| "buffer":0, | ||
| "byteLength":128, | ||
| "byteOffset":384, | ||
| "target":34962 | ||
| }, | ||
| { | ||
| "buffer":0, | ||
| "byteLength":84, | ||
| "byteOffset":512, | ||
| "target":34963 | ||
| }, | ||
| { | ||
| "buffer":0, | ||
| "byteLength":3552, | ||
| "byteOffset":596, | ||
| "target":34962 | ||
| }, | ||
| { | ||
| "buffer":0, | ||
| "byteLength":3552, | ||
| "byteOffset":4148, | ||
| "target":34962 | ||
| }, | ||
| { | ||
| "buffer":0, | ||
| "byteLength":2368, | ||
| "byteOffset":7700, | ||
| "target":34962 | ||
| }, | ||
| { | ||
| "buffer":0, | ||
| "byteLength":2880, | ||
| "byteOffset":10068, | ||
| "target":34963 | ||
| } | ||
| ], | ||
| "samplers":[ | ||
| { | ||
| "magFilter":9728, | ||
| "minFilter":9984 | ||
| } | ||
| ], | ||
| "buffers":[ | ||
| { | ||
| "byteLength":12948, | ||
| "uri":"example_asset.bin" | ||
| } | ||
| ] | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| { | ||
| "metadata": { | ||
| "name": "another example", | ||
| "description": "Second example material to showcase OpenMATERIAL assignment and mapping", | ||
| "uuid": "807db46a39654e5d83d43ddebad07dc3", | ||
| "materialVersion": "1.0.0", | ||
| "creationDate": "20241024T110000Z", | ||
| "openMaterialVersion": "1.0.0", | ||
| "copyright": "(C) 2023-2024, Example Company", | ||
| "license": "MPL-2.0", | ||
| "author": "[email protected]" | ||
| }, | ||
| "materialProperties": { | ||
| "surfaceRoughness": { | ||
| "surfaceHeightRms": 0.5, | ||
| "surfaceCorrelationLength": 0.3, | ||
| "source": "estimate" | ||
| }, | ||
| "emissivityData": { | ||
| "emissivityCoefficient": 0.07, | ||
| "temperature": 300.0, | ||
| "source": "internet: https://www.engineeringtoolbox.com/emissivity-coefficients-d_447.html" | ||
| }, | ||
| "elasticityData": { | ||
| "youngsModulus": 70e9, | ||
| "poissonsRatio": 0.35, | ||
| "source": "internet: https://en.wikipedia.org/wiki/Aluminium" | ||
| }, | ||
| "densityData": { | ||
| "density": 2699.0, | ||
| "source": "internet: https://en.wikipedia.org/wiki/Aluminium" | ||
| }, | ||
| "electromagneticPropertiesUri": "example_material_emp.xompt" | ||
| } | ||
| } |
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hey @ClemensLinnhoff i am wondering if we should limit ourself to RGB values here. 24 Bit, 16 Mio values enough for all kinds of MaterialIDs.
I think that the alpha value could be useful for something we plan in OpenMaterial 2.0. But if people now already use the alpha channel for IDs, then its hard to change.
My idea here would be to reserve the alpha channel for the future. Maybe for layered Materials.
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Regarding this: we may also want to clarify, that the MaterialID Textures need to be 32Bit RGBA.
or do we want to support 24Bit RGB as well?