Add splat build schema

build/schemas/arena-schema-files.json

@@ -59,6 +59,11 @@
         "file": "schemas/gltf-model.json",
         "title": "GLTF Model"
     },
+    "gaussian-splat": {
+        "description": "Load 3D Gaussian Splat",
+        "file": "schemas/gaussian-splat.json",
+        "title": "3D Gaussian Splat"
+    },
     "image": {
         "description": "Display an image on a plane",
         "file": "schemas/image.json",

build/schemas/gaussian-splat.json

@@ -0,0 +1,78 @@
+{
+  "title": "3D Gaussian Splat",
+  "description": "Load a 3D Gaussian Splat for Real-Time Radiance Field Rendering",
+  "allOf": [
+    {
+      "$ref": "./schemas/definitions-arena-object.json#/properties"
+    },
+    {
+      "properties": {
+        "data": {
+          "allOf": [
+            {
+              "properties": {
+                "object_type": {
+                  "type": "string",
+                  "title": "3D object type",
+                  "description": "3D object type (derived from 'type' select above).",
+                  "enum": [
+                    "entity"
+                  ]
+                },
+                "src": {
+                  "description": "Splat URL. Dropbox share links also accepted. Store files paths under '/store/users/<username>' (e.g. store/users/wiselab/models/factory_robot_arm/scene.gltf); to use CDN, prefix with `https://arena-cdn.conix.io/` (e.g. https://arena-cdn.conix.io/store/users/wiselab/models/factory_robot_arm/scene.gltf)",
+                  "format": "uri",
+                  "title": "src",
+                  "type": "string"
+                },
+                "cutoutEntity": {
+                  "description": "Selector to a box primitive that uses scale and position to define the bounds of splat points to render",
+                  "type": "string",
+                  "title": "Cutout Entity (Optional)",
+                  "default": ""
+                },
+                "pixelRatio": {
+                  "description": "Pixel ratio for rendering. Reducing the value decreases the resolution and improves performance. If a negative value is set, the device's native value will be applied.",
+                  "type": "number",
+                  "title": "Pixel Ratio",
+                  "default": 1.0
+                },
+                "xrPixelRatio": {
+                  "description": " \tSame as pixelRatio. Applied to XR devices.",
+                  "type": "number",
+                  "title": "XR Pixel Ratio",
+                  "default": 0.5
+                }
+              }
+            },
+            {
+              "$ref": "./schemas/definitions-entity.json#/properties"
+            },
+            {
+              "$ref": "./schemas/definitions-common.json#/properties"
+            }
+          ],
+          "title": "3D Gaussian Splat",
+          "additionalProperties": true,
+          "default": {
+            "object_type": "entity"
+          },
+          "required": [
+            "object_type",
+            "src",
+            "position",
+            "rotation",
+            "scale"
+          ]
+        }
+      }
+    }
+  ],
+  "required": [
+    "object_id",
+    "action",
+    "type",
+    "data",
+    "persist"
+  ]
+}