Bounds -> Slice

extensions/2.0/Vendor/EXT_implicit_geometry/README.md

@@ -54,10 +54,7 @@ The `box` property represents an axis-aligned box that is centered at the origin
 <table>
   <tr>
     <th>
-      Example
-    </th>
-    <th>
-      Visual
+    Example
     </th>
   </tr>
   <tr>
@@ -75,7 +72,7 @@ The `box` property represents an axis-aligned box that is centered at the origin
     ]
     </pre></td>
     <td>
-    <img width="600px" src="figures/non-uniform-box.png"/>
+    <img src="figures/box.png"/>
     </td>
   </tr>
 </table>
@@ -87,10 +84,7 @@ The `cylinder` property represents a cylinder that is aligned with the `y`-axis
 <table>
   <tr>
     <th>
-      Example
-    </th>
-    <th>
-      Visual
+    Example
     </th>
   </tr>
   <tr>
@@ -109,7 +103,7 @@ The `cylinder` property represents a cylinder that is aligned with the `y`-axis
     ]
     </pre></td>
     <td>
-    **TODO** visual example
+    <img src="figures/cylinder.png"/>
     </td>
   </tr>
 </table>
@@ -121,10 +115,7 @@ The `sphere` property represents a sphere that is centered at the origin. The `r
 <table>
   <tr>
     <th>
-      Example
-    </th>
-    <th>
-      Visual
+    Example
     </th>
   </tr>
   <tr>
@@ -142,7 +133,7 @@ The `sphere` property represents a sphere that is centered at the origin. The `r
     ]
     </pre></td>
     <td>
-    **TODO** visual example
+    <img src="figures/sphere.png"/>
     </td>
   </tr>
 </table>
@@ -156,10 +147,7 @@ The `ellipsoid` property represents an ellipsoid that is centered at the origin.
 <table>
   <tr>
     <th>
-      Example
-    </th>
-    <th>
-      Visual
+    Example
     </th>
   </tr>
   <tr>
@@ -168,7 +156,7 @@ The `ellipsoid` property represents an ellipsoid that is centered at the origin.
         {
           "extensions": {
             "EXT_implicit_geometry": {
-              "ellpisoid": {
+              "ellipsoid": {
                 "radii": [2, 3, 4]
               }
             }
@@ -185,9 +173,40 @@ The `ellipsoid` property represents an ellipsoid that is centered at the origin.
 
 ### Region
 
-The `region` property represents a region above the surface of an ellipsoid. Though the ellipsoid itself is centered at the origin, the region may be distant from the origin due to its properties.
+The `region` property represents a region extruded from the surface of a ellipsoid. The ellipsoid itself is not part of the geometry; it is merely used as reference from which the actual region is defined.
+
+The reference ellipsoid is centered at the origin. The `semiMajorAxisRadius` indicates the radii of the ellipsoid in meters along the `x` and `z` axes. The `semiMinorAxisRadius` indicates the radius of the ellipsoid in meters along the `y` axis.
+
+The `heightFromSurface` property indicates the height of the region from the ellipsoid's surface, in meters. In other words, the region begins atop ellipsoid's surface, and is then extruded outwards to the specified height.
 
-The `semiMajorAxis` property indicates the radii of the ellipsoid in meters along the `x`, `y`, and `z` axes.
+<table>
+  <tr>
+    <th>
+    Example
+    </th>
+  </tr>
+  <tr>
+    <td><pre>
+      "primitives": [
+        {
+          "extensions": {
+            "EXT_implicit_geometry": {
+              "region": {
+                "semiMajorAxisRadius": 4,
+                "semiMinorAxisRadius": 2,
+                "heightFromSurface": 0.5 
+              }
+            }
+          }
+        }
+      ]
+    </pre></td>
+    <td>
+    **TODO** visual example
+    </td>
+  </tr>
+</table>
+```
 
 ## Optional vs. Required
 This extension is required, meaning it should be placed in both the `extensionsUsed` list and `extensionsRequired` list.

extensions/2.0/Vendor/EXT_implicit_geometry/schema/box.schema.json

@@ -12,16 +12,12 @@
     "properties": {
         "size": {
             "type": "array",
-            "description": "The size of the box in three dimensions.",
+            "description": "The size of the box in meters.",
             "items": {
                 "type": "number"
             },
             "minItems": 3,
             "maxItems": 3
-        },
-        "bounds": {
-            "$ref": "box.bounds.schema.json",
-            "description": "The optional bounds of the box."
         }
     },
     "required": [

extensions/2.0/Vendor/EXT_implicit_geometry/schema/cylinder.schema.json

@@ -12,17 +12,17 @@
     "properties": {
         "radius": {
             "type": "number",
-            "description": "The radius of the cylinder in local space.",
+            "description": "The radius of the cylinder in meters.",
             "minimum": 0
         },
         "height": {
             "type": "number",
-            "description": "The height of the cylinder in local space.",
+            "description": "The height of the cylinder in meters.",
             "minimum": 0
         },
-        "bounds": {
-            "$ref": "cylinder.bounds.schema.json",
-            "description": "The optional bounds of the cylinder."
+        "slice": {
+            "$ref": "cylinder.slice.schema.json",
+            "description": "The optionally-defined slice of the cylinder."
         }
     },
     "required": [

extensions/2.0/Vendor/EXT_implicit_geometry/schema/cylinder.bounds.schema.json → extensions/2.0/Vendor/EXT_implicit_geometry/schema/cylinder.slice.schema.json

@@ -1,9 +1,9 @@
 {
     "$schema": "https://json-schema.org/draft/2020-12/schema",
-    "$id": "cylinder.bounds.schema.json",
-    "title": "Cylinder Bounds",
+    "$id": "cylinder.slice.schema.json",
+    "title": "Cylinder Slice",
     "type": "object",
-    "description": "A set of bounds for an implicit cylinder surface. Defines the subsection of the cylinder that the implicit volume actually occupies.",
+    "description": "A slice of an implicit cylinder. Defines the subsection of the cylinder that the implicit volume actually occupies.",
     "allOf": [
         {
             "$ref": "glTFProperty.schema.json"
@@ -12,42 +12,42 @@
     "properties": {
         "minRadius": {
             "type": "number",
-            "description": "The minimum radial bound of the cylinder.",
+            "description": "The start of the slice along the radius of the cylinder.",
             "minimum": 0,
             "maximum": 1,
             "default": 0
         },
         "maxRadius": {
             "type": "number",
-            "description": "The maximum radial bound of the cylinder.",
+            "description": "The end of the slice along the radius of the cylinder.",
             "minimum": 0,
             "maximum": 1,
             "default": 1
         },
         "minHeight": {
             "type": "number",
-            "description": "The minimum height bound of the cylinder.",
+            "description": "The start of the slice along the height of the cylinder.",
             "minimum": 0,
             "maximum": 1,
             "default": 0
         },
         "maxHeight": {
             "type": "number",
-            "description": "The maximum height bound of the cylinder.",
+            "description": "The end of the slice along the height of the cylinder.",
             "minimum": 0,
             "maximum": 1,
             "default": 1
         },
         "minAngle": {
             "type": "number",
-            "description": "The maximum angular bound of the cylinder in radians. Values must be in the range [-pi, pi].",
+            "description": "The start of the slice along the angle of the cylinder. Values must be in the range [-pi, pi].",
             "minimum": -3.14159265359,
             "maximum": 3.14159265359,
             "default": -3.14159265359
         },
         "maxAngle": {
             "type": "number",
-            "description": "The maximum angular bound of the cylinder in radians. Values must be in the range [-pi, pi].",
+            "description": "The end of the slice along the angle of the cylinder. Values must be in the range [-pi, pi].",
             "minimum": -3.14159265359,
             "maximum": 3.14159265359,
             "default": 3.14159265359

extensions/2.0/Vendor/EXT_implicit_geometry/schema/ellipsoid.schema.json

@@ -12,17 +12,17 @@
     "properties": {
         "radii": {
             "type": "array",
-            "description": "The radii of the ellipsoid in meters along the X, Y, and Z axes in local space.",
+            "description": "The radii of the ellipsoid along the X, Y, and Z axes in meters.",
             "items": {
                 "type": "number",
                 "minimum": 0
             },
             "minItems": 3,
             "maxItems": 3
         },
-        "bounds": {
-            "$ref": "ellipsoid.bounds.schema.json",
-            "description": "The optional bounds of the ellipsoid."
+        "slice": {
+            "$ref": "ellipsoid.slice.schema.json",
+            "description": "The optionally-defined slice of the ellipsoid."
         }
     },
     "required": [

extensions/2.0/Vendor/EXT_implicit_geometry/schema/mesh.primitive.EXT_implicit_geometry.schema.json

@@ -3,7 +3,7 @@
     "$id": "mesh.primitive.EXT_implicit_geometry.schema.json",
     "title": "EXT_primitive_voxels glTF Mesh Primitive extension",
     "type": "object",
-    "description": "`EXT_implicit_geometry` extension for a primitive in a glTF model, to define implicit 3D geometry",
+    "description": "`EXT_implicit_geometry` extension for a primitive in a glTF model to represent implicit 3D geometry",
     "allOf": [
         {
             "$ref": "glTFProperty.schema.json"

extensions/2.0/Vendor/EXT_implicit_geometry/schema/region.schema.json

@@ -12,21 +12,21 @@
     "properties": {
         "semiMajorAxisRadius": {
             "type": "number",
-            "description": "The radius of the reference ellipsoid along its semi-major axis in meters.",
+            "description": "The radius along the semi-major axis of the reference ellipsoid in meters.",
             "minimum": 0
         },
         "semiMinorAxisRadius": {
             "type": "number",
-            "description": "The radius of the reference ellipsoid along its semi-minor axis in meters.",
+            "description": "The radius along the semi-minor axis of the reference ellipsoid in meters.",
             "minimum": 0
         },
         "heightFromSurface": {
             "type": "number",
             "description": "The height of this region from the surface of the reference ellipsoid in meters.",
         },
-        "bounds": {
-            "$ref": "region.bounds.schema.json",
-            "description": "The optional bounds of the region."
+        "slice": {
+            "$ref": "region.slice.schema.json",
+            "description": "The optionally-defined slice of the region."
         }
     },
     "required": [