{
  "$schema": "https://json-schema.org/draft/2020-12/schema",  
  "$id": "https://xrfragment.org/schema/xrfragment-engine-prefixes.json",
  "$version": 34,
  "title": "XR Fragments Engine Prefixes",
  "type": "object",
  "flatten": true,

  "properties": {
    "engine": {
      "type": "enum",
      "enum": [
        ["NONE", "-- Select --", ""], 
        ["JANUSXR", "JanusXR", ""], 
        ["THREEJS", "Three.js", ""],
        ["GODOT3", "Godot 3", ""],
        ["GODOT4", "Godot 4", ""],
        ["AFRAME", "AFRAME", ""],
        ["BABYLON", "Babylon.js", ""],
        ["PLAYCANVAS", "PlayCanvas", ""]
      ],
      "default": "NONE"
    },
    "engine_settings": {
      "oneOf": [
        {"engine_val": "JANUSXR", "$ref": "#/$defs/janus", "title": "JanusXR"},
        {"engine_val": "THREEJS", "$ref": "#/$defs/three", "title": "THREE.js"},
        {"engine_val": "GODOT3", "$ref": "#/$defs/godot3", "title": "Godot3 (beta)"},
        {"engine_val": "GODOT4", "$ref": "#/$defs/godot4", "title": "Godot4 (beta)"},
        {"engine_val": "AFRAME", "$ref": "#/$defs/aframe", "title": "AFRAME (beta)"},
        {"engine_val": "BABYLON", "$ref": "#/$defs/babylon", "title": "Babylon.js (beta)"},
        {"engine_val": "PLAYCANVAS", "$ref": "#/$defs/playcanvas", "title": "PlayCanvas (beta)"}
      ]
    }
  },

  "$defs": {


    "three": {
      "oneOf":[
        {"$ref": "#/$defs/three_material"},
        {"$ref": "#/$defs/three_object"}
      ]
    }, 

    "aframe": {
      "oneOf":[
        {"$ref": "#/$defs/three_material"},
        {"$ref": "#/$defs/three_object"}
      ]
    }, 

    "three_material":{
      "title": "Material",
      "description": "Material is THREE's abstract base material class",
      "url": "https://threejs.org/docs/?q=material#Material",            
      "properties":{
        "_three-type": { "title": "type", "type": "string", "default":"material", "description": "needed for blender UI"},
        "-three-material.blending":{
          "type":"string", 
          "enum": ["THREE.NormalBlending", "THREE.NoBlending", "THREE.AdditiveBlending", "THREE.SubtractiveBlending", "THREE.MultiplyBlending" ]
        },
        "-three-material.sides":{
          "type":"string",
          "description": "culling: which sides to render (less increases fps)",
          "enum": ["THREE.FrontSide","THREE.BackSide","THREE.DoubleSide"]
        },
        "-three-material.map.offset.x+":{
          "type":"number",
          "description": "texture scrolling speed",
          "default": 0.005,
          "minimum": 0.000001,
          "maximum": 1
        },
        "-three-material.map.offset.yx+":{
          "type":"number",
          "description": "texture scrolling speed",
          "default": 0.005,
          "minimum": 0.000001,
          "maximum": 1
        }
      }
    },

    "three_object":{
      "title": "Object3D",
      "description": "Object3D is THREE's abstract base entity class",
      "url": "https://threejs.org/docs/?q=Object3D#Object3D",
      "properties":{
        "_three-type": { "title": "type", "type": "string", "default":"object3D", "description": "needed for blender UI"},
        "-three-renderOrder":{
          "type":"integer", 
          "minimum": 0,
          "maximum": 100 
        }                
      }
    },        

    "janus": {
      "oneOf":[
        {"$ref": "#/$defs/janus_image"},
        {"$ref": "#/$defs/janus_video"},
        {"$ref": "#/$defs/janus_link"}
      ]
    },

    "janus_image": {
      "description": "The <image> tag allows displaying images via url, relative file, or data-uri's",
      "url": "https://janusvr.com/docs/build/roomtag/index.html#Link",          
      "title": "<image>",
      "properties": {
        "-janus-tag": {"type":"string", "default":"image"},
        "-janus-id":  {"type":"object.name"},
        "-janus-col": {"$ref": "#/$defs/-janus-col"},
        "-janus-lighting": {"$ref": "#/$defs/-janus-lighting"},
        "-janus-fwd":   {"$ref": "#/$defs/-janus-fwd"},
        "-janus-scale":  {"$ref": "#/$defs/-janus-scale"},
        "-janus-rotation":  {"$ref": "#/$defs/-janus-rotation" },
        "-janus-locked": {"$ref": "#/$defs/-janus-locked"},
        "-janus-draw-layer":   {"$ref": "#/$defs/-janus-draw_layer"}        
      }
    },
    "janus_video": {
      "title": "<video>",
      "description": "The <video> tag allows displaying videos",
      "url": "https://janusvr.com/docs/build/roomtag/index.html#Video",             
      "properties": {
        "-janus-tag": {"type":"string", "default":"video"},
        "-janus-id":  {"type":"object.name"},
        "-janus-thumb_id":  {"$ref": "#/$defs/-janus-thumb_id"},
        "-janus-col": {"$ref": "#/$defs/-janus-col"},
        "-janus-lighting": {"$ref": "#/$defs/-janus-lighting"},
        "-janus-fwd":   {"$ref": "#/$defs/-janus-fwd"},
        "-janus-scale":  {"$ref": "#/$defs/-janus-scale"},
        "-janus-rotation":  {"$ref": "#/$defs/-janus-rotation" },
        "-janus-locked": {"$ref": "#/$defs/-janus-locked"},
        "-janus-draw-layer":   {"$ref": "#/$defs/-janus-draw_layer"},
        "-janus-gain": { "type":"float", "minimum":0, "maximum":1 }
      }
    },
    "janus_link": {
      "title": "<link>",
      "description": "The <link> tag allows creating portals to other scenes",
      "url": "https://janusvr.com/docs/build/roomtag/index.html#Link",              
      "properties": {
        "-janus-tag": {"type":"string", "default":"link"},
        "-janus-url":  {"type":"string", "default": "https://..."},
        "-janus-title": {"type":"string", "default": "my title"},
        "-janus-thumb_id":  {"$ref": "#/$defs/-janus-thumb_id"},
        "-janus-draw_glow": {"type": "boolean", "default": true },
        "-janus-draw_text": {"type": "boolean", "default": true },
        "-janus-auto_load": {"type": "boolean", "default": false },
        "-janus-mirror":    {"type": "boolean", "default": false },
        "-janus-col": {"$ref": "#/$defs/-janus-col"},
        "-janus-lighting": {"$ref": "#/$defs/-janus-lighting"},
        "-janus-fwd":   {"$ref": "#/$defs/-janus-fwd"},
        "-janus-scale":  {"$ref": "#/$defs/-janus-scale"},
        "-janus-rotation":  {"$ref": "#/$defs/-janus-rotation" },
        "-janus-locked": {"$ref": "#/$defs/-janus-locked"},
        "-janus-draw-layer":   {"$ref": "#/$defs/-janus-draw_layer"}
      }
    },
    "janus_object": {
      "title": "<object>",
      "description": "The <object> tag allows displaying 3D files",
      "url": "https://janusvr.com/docs/build/roomtag/index.html#Object",  
      "properties": {
        "-janus-tag": {"type":"string", "default":"object"},
        "-janus-col": {"$ref": "#/$defs/-janus-col"},
        "-janus-fwd":   {"$ref": "#/$defs/-janus-fwd"},
        "-janus-scale":  {"$ref": "#/$defs/-janus-scale"},
        "-janus-rotation":  {"$ref": "#/$defs/-janus-rotation" },
        "-janus-locked": {"$ref": "#/$defs/-janus-locked"},
        "-janus-lighting": {"$ref": "#/$defs/-janus-lighting"},
        "-janus-draw-layer":   {"$ref": "#/$defs/-janus-draw_layer"}
      }
    },       

    "-janus-thumb_id": {"type":"object.name"},
    "-janus-lighting": {"type": "boolean", "default": false },
    "-janus-col":      {"type": "color", "default": "#FFFFFF"},
    "-janus-fwd":      {"type": "string", "default": "0 0 1"},
    "-janus-scale":    {"type": "string", "default": "1 1 1"},
    "-janus-rotation": {"type": "string", "default": "0 0 0"},
    "-janus-locked":   {"type": "boolean", "default": false},
    "-janus-draw_layer":   {"type": "integer", "default": 0, "minimum":0, "maximum": 100},   

    "godot3": {
      "oneOf": [
        { "$ref": "#/$defs/godot3_material" },
        { "$ref": "#/$defs/godot3_spatial" }
      ]
    },

    "godot3_material": {
      "title": "SpatialMaterial",
      "description": "The default Pmaterial for Godot 3.",
      "url": "https://docs.godotengine.org/en/3.0/tutorials/3d/spatial_material.html",            
      "properties": {
        "_godot3-type": { 
          "title": "type", 
          "type": "string", 
          "default": "SpatialMaterial"
        },
        "-godot3-params_blend_mode": {
          "type": "string",
          "description": "mat.params_blend_mode = SpatialMaterial.BLEND_MODE_MIX",
          "enum": [
            "SpatialMaterial.BLEND_MODE_MIX", 
            "SpatialMaterial.BLEND_MODE_ADD", 
            "SpatialMaterial.BLEND_MODE_SUB", 
            "SpatialMaterial.BLEND_MODE_MUL"
          ]
        },
        "-godot3-params_cull_mode": {
          "type": "string",
          "description": "mat.params_cull_mode = SpatialMaterial.CULL_BACK",
          "enum": [
            "SpatialMaterial.CULL_BACK", 
            "SpatialMaterial.CULL_FRONT", 
            "SpatialMaterial.CULL_DISABLED"
          ]
        },
        "-godot3-uv1_offset.x+": {
          "type": "number",
          "description": "mat.uv1_offset.x += speed * delta",
          "default": 0.005,
          "minimum": 0.000001,
          "maximum": 1
        },
        "-godot3-uv1_offset.y+": {
          "type": "number",
          "description": "mat.uv1_offset.y += speed * delta",
          "default": 0.005,
          "minimum": 0.000001,
          "maximum": 1
        }
      }
    },

    "godot3_spatial": {
      "title": "Object",
      "properties": {
        "_godot3-type": { 
          "title": "type", 
          "type": "string", 
          "default": "Object"
        },
        "-godot3-render_priority": {
          "type": "integer",
          "description": "mat.render_priority = value",
          "minimum": -128,
          "maximum": 127
        }
      }
    },

    "godot4": {
      "oneOf": [ { "$ref": "#/$defs/godot4_material" },  { "$ref": "#/$defs/godot4_node3d" } ]
    },
    "godot4_material": {
      "title": "StandardMaterial3D",
      "description": "The default PBR material for Godot 4.",
      "url": "https://docs.godotengine.org/en/stable/classes/class_standardmaterial3d.html",
      "properties": {
        "_godot4-type": {
          "title": "type",
          "type": "string",
          "default": "StandardMaterial3D"
        },
        "-gotod4-blend_mode": {
          "type": "string",
          "description": "mat.blend_mode = BaseMaterial3D.BLEND_MODE_MIX",
          "enum": [
            "BaseMaterial3D.BLEND_MODE_MIX",
            "BaseMaterial3D.BLEND_MODE_ADD",
            "BaseMaterial3D.BLEND_MODE_SUB",
            "BaseMaterial3D.BLEND_MODE_MUL"
          ]
        },
        "-gotod4-cull_mode": {
          "type": "string",
          "description": "mat.cull_mode = BaseMaterial3D.CULL_BACK",
          "enum": [
            "BaseMaterial3D.CULL_BACK",
            "BaseMaterial3D.CULL_FRONT",
            "BaseMaterial3D.CULL_DISABLED"
          ]
        },
        "-gotod4-uv1_offset.x+": {
          "type": "number",
          "description": "mat.uv1_offset.x += speed * delta",
          "default": 0.005,
          "minimum": 0.000001,
          "maximum": 1
        },
        "-gotod4-uv1_offset.y+": {
          "type": "number",
          "description": "mat.uv1_offset.y += speed * delta",
          "default": 0.005,
          "minimum": 0.000001,
          "maximum": 1
        }
      }
    },
    "godot4_node3d": {
      "title": "Node3D",
      "properties": {
        "_godot4-type": {
          "title": "type",
          "type": "string",
          "default": "Node3D"
        },
        "-godot4-render_priority": {
          "type": "integer",
          "description": "mat.render_priority = value",
          "minimum": -128,
          "maximum": 127
        }
      }
    }, 

    "playcanvas": {
      "oneOf": [
        {
          "$ref": "#/$defs/playcanvas_material"
        },
        {
          "$ref": "#/$defs/playcanvas_entity"
        }
      ]
    },
    "playcanvas_material": {
      "title": "StandardMaterial",
      "properties": {
        "_playcanvas-type": {
          "title": "type",
          "type": "string",
          "default": "material",
          "description": "var mat = new pc.StandardMaterial()"
        },
        "-playcanvas-material.blendType": {
          "type": "string",
          "description": "mat.blendType = pc.BLEND_NORMAL",
          "enum": [
            "pc.BLEND_NORMAL",
            "pc.BLEND_NONE",
            "pc.BLEND_ADDITIVE",
            "pc.BLEND_SUBTRACTIVE",
            "pc.BLEND_MULTIPLICATIVE"
          ]
        },
        "-playcanvas-material.cull": {
          "type": "string",
          "description": "mat.cull = pc.CULL_BACK",
          "enum": [
            "pc.CULL_BACK",
            "pc.CULL_FRONT",
            "pc.CULL_NONE"
          ]
        },
        "-playcanvas-material.diffuseMapOffset.x": {
          "type": "number",
          "description": "mat.diffuseMapOffset.x += speed * dt",
          "default": 0.005,
          "minimum": 0.000001,
          "maximum": 1
        },
        "-playcanvas-material.diffuseMapOffset.y": {
          "type": "number",
          "description": "mat.diffuseMapOffset.y += speed * dt",
          "default": 0.005,
          "minimum": 0.000001,
          "maximum": 1
        }
      }
    },

    "playcanvas_entity": {
      "title": "Entity",
      "properties": {
        "_playcanvas-type": {
          "title": "type",
          "type": "string",
          "default": "entity"
        },
        "-playcanvas-renderOrder": {
          "type": "integer",
          "description": "entity.render.layers = [layerID] // Custom sorting via layers or drawOrder",
          "minimum": 0,
          "maximum": 100
        }
      }
    },      

    "babylon": {
      "oneOf": [
        {
          "$ref": "#/$defs/babylon_material"
        },
        {
          "$ref": "#/$defs/babylon_node"
        }
      ]
    },
    "babylon_material": {
      "title": "StandardMaterial",
      "properties": {
        "_babylon-type": {
          "title": "type",
          "type": "string",
          "default": "StandardMaterial"
        },
        "-babylon-material.alphaMode": {
          "type": "string",
          "description": "mat.alphaMode = BABYLON.Engine.ALPHA_COMBINE",
          "enum": [
            "BABYLON.Engine.ALPHA_COMBINE",
            "BABYLON.Engine.ALPHA_DISABLE",
            "BABYLON.Engine.ALPHA_ADD",
            "BABYLON.Engine.ALPHA_SUBTRACT",
            "BABYLON.Engine.ALPHA_MULTIPLY"
                        ]
        },
        "-babylon-material.sideOrientation": {
          "type": "string",
          "description": "mat.backFaceCulling = true // or mat.sideOrientation",
          "enum": [
            "BABYLON.Material.ClockWiseSideOrientation",
            "BABYLON.Material.CounterClockWiseSideOrientation",
            "BABYLON.Material.TwoSidedLighting"
                        ]
        },
        "-babylon-material.diffuseTexture.uOffset": {
          "type": "number",
          "description": "mat.diffuseTexture.uOffset += speed * scene.getAnimationRatio()",
          "default": 0.005,
          "minimum": 0.000001,
          "maximum": 1
        },
        "-babylon-material.diffuseTexture.vOffset": {
          "type": "number",
          "description": "mat.diffuseTexture.vOffset += speed * scene.getAnimationRatio()",
          "default": 0.005,
          "minimum": 0.000001,
          "maximum": 1
        }
      }
    },
    "babylon_node": {
      "title": "AbstractMesh",
      "properties": {
        "_babylon-type": {
          "title": "type",
          "type": "string",
          "default": "mesh",
          "description": "var mesh = new BABYLON.Mesh('mesh', scene)"
        },
        "-babylon-renderingGroupId": {
          "type": "integer",
          "description": "mesh.renderingGroupId = value // 0 to 3 by default",
          "minimum": 0,
          "maximum": 100
        }
      }
    }            
  }
}