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Merge pull request #140 from ClemensLinnhoff/50-add-brdf-look-up-tabl…
…e-to-the-material-data Add example brdf data and brdf schema
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,141 @@ | ||
| { | ||
| "$schema": "http://json-schema.org/draft-07/schema#", | ||
| "type": "object", | ||
| "properties": { | ||
| "metadata": { | ||
| "type": "object", | ||
| "description": "Metadata about the material.", | ||
| "properties": { | ||
| "name": { | ||
| "type": "string", | ||
| "description": "Name of the material." | ||
| }, | ||
| "description": { | ||
| "type": "string", | ||
| "description": "Short description of the material in 2 - 3 sentences." | ||
| }, | ||
| "uuid": { | ||
| "type": "string", | ||
| "description": "Universally unique identifier for the material.", | ||
| "pattern": "^[a-f0-9]{32}$" | ||
| }, | ||
| "materialVersion": { | ||
| "type": "string", | ||
| "description": "Version of the material.", | ||
| "pattern": "^\\d+\\.\\d+\\.\\d+$" | ||
| }, | ||
| "creationDate": { | ||
| "type": "string", | ||
| "description": "Creation date of the material in the format YYYYMMDDTHHMMSSZ.", | ||
| "pattern": "^\\d{8}T\\d{6}Z$" | ||
| }, | ||
| "openMaterialVersion": { | ||
| "type": "string", | ||
| "description": "Version of OpenMATERIAL.", | ||
| "pattern": "^\\d+\\.\\d+\\.\\d+$" | ||
| }, | ||
| "copyright": { | ||
| "type": "string", | ||
| "description": "Copyright information with year and company." | ||
| }, | ||
| "license": { | ||
| "type": "string", | ||
| "description": "License information. For common open source licenses, provide an SPDX identifier. For other types of licenses, provide an URL to a webpage with the license or the filename of a separately provided license file." | ||
| }, | ||
| "author": { | ||
| "type": "string", | ||
| "description": "Name or email address of the author of this material. In case of multiple authors, use comma-separation. The author can also be a company name." | ||
| }, | ||
| "source": { | ||
| "type": "string", | ||
| "description": "Source of the brdf data." | ||
| } | ||
| }, | ||
| "required": [ | ||
| "name", | ||
| "description", | ||
| "uuid", | ||
| "materialVersion", | ||
| "creationDate", | ||
| "openMaterialVersion", | ||
| "copyright", | ||
| "license", | ||
| "author", | ||
| "source" | ||
| ] | ||
| }, | ||
| "brdf": { | ||
| "type": "object", | ||
| "description": "General information about the lookup table.", | ||
| "properties": { | ||
| "typicalSensor": { | ||
| "type": "string", | ||
| "description": "Typical sensor technology this BRDF table is used for, e.g., radar, lidar, camera." | ||
| }, | ||
| "wavelengthRange": { | ||
| "type": "array", | ||
| "description": "Wavelength range covered by the lookup table. The first item is the minimum wavelength in meters and the second item is the maximum wavelength in meters.", | ||
| "items": { | ||
| "type": "number" | ||
| }, | ||
| "minItems": 2, | ||
| "maxItems": 2 | ||
| }, | ||
| "amplitudeUnit": { | ||
| "type": "string", | ||
| "description": "The unit of amplitude, either \"1/sr\" or \"linear\"", | ||
| "enum": ["1/sr", "linear"] | ||
| }, | ||
| "lookupTable": { | ||
| "type": "array", | ||
| "description": "Array of bidirectional reflectance distribution function (BRDF) values, with each item representing a different property. The array SHALL be sorted based on the columns starting with the first.", | ||
| "items": { | ||
| "type": "array", | ||
| "items": [ | ||
| { | ||
| "type": ["number", "null"], | ||
| "description": "Incident elevation angle in rad." | ||
| }, | ||
| { | ||
| "type": ["number", "null"], | ||
| "description": "Exit elevation angle in rad." | ||
| }, | ||
| { | ||
| "type": ["number", "null"], | ||
| "description": "Exit azimuth angle in rad (for BRDFs with incident and exit vectors on the same plane as the normal, exit azimuth angle is 0.)" | ||
| }, | ||
| { | ||
| "type": ["number", "null"], | ||
| "description": "Polarized plane angle in rad. This is the angle between the plane containing the incident, exit, and normal vector, and the plane of polarization." | ||
| }, | ||
| { | ||
| "type": ["number", "null"], | ||
| "description": "Wavelength in meters." | ||
| }, | ||
| { | ||
| "type": ["number", "null"], | ||
| "description": "Amplitude within the linearly polarized plane." | ||
| }, | ||
| { | ||
| "type": ["number", "null"], | ||
| "description": "Phase within the linearly polarized plane. If the phase is not taken into account, it is null." | ||
| } | ||
| ], | ||
| "minItems": 7, | ||
| "maxItems": 7 | ||
| } | ||
| } | ||
| }, | ||
| "required": [ | ||
| "typicalSensor", | ||
| "wavelengthRange", | ||
| "amplitudeUnit", | ||
| "lookupTable" | ||
| ] | ||
| } | ||
| }, | ||
| "required": [ | ||
| "metadata", | ||
| "brdf" | ||
| ] | ||
| } |
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