- "primitives": [
- {
- "extensions": {
- "EXT_implicit_geometry": {
+ "extensions": [
+ {
+ "EXT_implicit_geometry": {
+ "geometries": [
+ {
"region": {
"semiMajorAxisRadius": 4,
"semiMinorAxisRadius": 2,
"heightFromSurface": 0.5
}
}
- }
+ ]
}
- ]
+ }
+ ]
|
**TODO** visual example
diff --git a/extensions/2.0/Vendor/EXT_implicit_geometry/schema/ellipsoid.slice.schema.json b/extensions/2.0/Vendor/EXT_implicit_geometry/schema/ellipsoid.slice.schema.json
index 39ca274197..ae7a91d965 100644
--- a/extensions/2.0/Vendor/EXT_implicit_geometry/schema/ellipsoid.slice.schema.json
+++ b/extensions/2.0/Vendor/EXT_implicit_geometry/schema/ellipsoid.slice.schema.json
@@ -1,9 +1,9 @@
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
- "$id": "ellipsoid.bounds.schema.json",
- "title": "Ellipsoid Bounds",
+ "$id": "ellipsoid.slice.schema.json",
+ "title": "Ellipsoid Slice",
"type": "object",
- "description": "A set of bounds for an implicit ellipsoid surface. Defines the subsection of the ellipsoid that the implicit volume actually occupies.",
+ "description": "A slice of an implicit ellipsoid. Defines the subsection of the ellipsoid that the implicit volume actually occupies.",
"allOf": [
{
"$ref": "glTFProperty.schema.json"
@@ -12,41 +12,41 @@
"properties": {
"minRadius": {
"type": "number",
- "description": "The minimum radial bound of the ellipsoid.",
+ "description": "The start of the slice along the radius of the ellipsoid.",
"minimum": 0,
"maximum": 1,
"default": 0
},
"maxRadius": {
"type": "number",
- "description": "The maximum radial bound of the ellipsoid.",
+ "description": "The end of the slice along the radius of the ellipsoid.",
"minimum": 0,
"maximum": 1,
"default": 1
},
"minAngle": {
"type": "array",
- "description": "The minimum angular bounds of the ellipsoid in radians. The first element corresponds to the azimuthal angle (a.k.a longitude) and must be in the range [-pi, pi]. The second element corresponds to the polar angle (a.k.a. latitude) and must be in the range [-pi/2, pi/2].",
+ "description": "The start of the slice across the angles of the sphere, given in radians. The first element corresponds to the azimuthal angle (a.k.a longitude) and must be in the range [-pi, pi]. The second element corresponds to the polar angle (a.k.a. latitude) and must be in the range [-pi/2, pi/2].",
"items": {
"type": "number",
"minimum": -3.14159265359,
- "maximum": 3.14159265359,
+ "maximum": 3.14159265359
},
"minItems": 2,
"maxItems": 2,
"default": [-3.14159265359, -1.57079632679]
},
- "minAngle": {
+ "maxAngle": {
"type": "array",
- "description": "The maximum angular bounds of the ellipsoid in radians. The first element corresponds to the azimuthal angle (a.k.a longitude) and must be in the range [-pi, pi]. The second element corresponds to the polar angle (a.k.a. latitude) and must be in the range [-pi/2, pi/2].",
+ "description": "The end of the slice across the angles of the sphere, given in radians. The first element corresponds to the azimuthal angle (a.k.a longitude) and must be in the range [-pi, pi]. The second element corresponds to the polar angle (a.k.a. latitude) and must be in the range [-pi/2, pi/2].",
"items": {
"type": "number",
"minimum": -3.14159265359,
- "maximum": 3.14159265359,
+ "maximum": 3.14159265359
},
"minItems": 2,
"maxItems": 2,
"default": [3.14159265359, 1.57079632679]
- },
+ }
}
}
\ No newline at end of file
diff --git a/extensions/2.0/Vendor/EXT_implicit_geometry/schema/mesh.primitive.EXT_implicit_geometry.schema.json b/extensions/2.0/Vendor/EXT_implicit_geometry/schema/geometry.schema.json
similarity index 57%
rename from extensions/2.0/Vendor/EXT_implicit_geometry/schema/mesh.primitive.EXT_implicit_geometry.schema.json
rename to extensions/2.0/Vendor/EXT_implicit_geometry/schema/geometry.schema.json
index ffbd656bfe..9cb6b880f2 100644
--- a/extensions/2.0/Vendor/EXT_implicit_geometry/schema/mesh.primitive.EXT_implicit_geometry.schema.json
+++ b/extensions/2.0/Vendor/EXT_implicit_geometry/schema/geometry.schema.json
@@ -1,9 +1,9 @@
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
- "$id": "mesh.primitive.EXT_implicit_geometry.schema.json",
- "title": "EXT_primitive_voxels glTF Mesh Primitive extension",
+ "$id": "geometry.schema.json",
+ "title": "Geometry in EXT_implicit_geometry",
"type": "object",
- "description": "`EXT_implicit_geometry` extension for a primitive in a glTF model to represent implicit 3D geometry",
+ "description": "A definition of implicit 3D geometry.",
"allOf": [
{
"$ref": "glTFProperty.schema.json"
@@ -11,20 +11,20 @@
],
"properties": {
"box": {
- "$ref": "box.schema.json"
+ "$ref": "geometry.box.schema.json"
},
"cylinder": {
- "$ref": "cylinder.schema.json"
+ "$ref": "geometry.cylinder.schema.json"
},
"sphere": {
- "$ref": "sphere.schema.json"
+ "$ref": "geometry.sphere.schema.json"
},
"ellipsoid": {
- "$ref": "ellipsoid.schema.json"
+ "$ref": "geometry.ellipsoid.schema.json"
},
"region": {
- "$ref": "region.schema.json"
- },
+ "$ref": "geometry.region.schema.json"
+ }
},
"oneOf": [
{
diff --git a/extensions/2.0/Vendor/EXT_implicit_geometry/schema/glTF.EXT_implicit_geometry.schema.json b/extensions/2.0/Vendor/EXT_implicit_geometry/schema/glTF.EXT_implicit_geometry.schema.json
new file mode 100644
index 0000000000..86fb48087d
--- /dev/null
+++ b/extensions/2.0/Vendor/EXT_implicit_geometry/schema/glTF.EXT_implicit_geometry.schema.json
@@ -0,0 +1,22 @@
+{
+ "$schema": "https://json-schema.org/draft/2020-12/schema",
+ "$id": "glTF.EXT_implicit_geometry.schema.json",
+ "title": "EXT_implicit_geometry glTF extension",
+ "type": "object",
+ "description": "`EXT_implicit_geometry` extension to represent implicit 3D geometry in a glTF model",
+ "allOf": [
+ {
+ "$ref": "glTFProperty.schema.json"
+ }
+ ],
+ "properties": {
+ "geometries": {
+ "type": "array",
+ "description": "An array of implicit geometry definitions.",
+ "minItems": 1,
+ "items": {
+ "$ref": "geometry.schema.json"
+ }
+ }
+ }
+}
\ No newline at end of file
diff --git a/extensions/2.0/Vendor/EXT_implicit_geometry/schema/region.schema.json b/extensions/2.0/Vendor/EXT_implicit_geometry/schema/region.schema.json
index 539c1bbd0f..abb0dec8f7 100644
--- a/extensions/2.0/Vendor/EXT_implicit_geometry/schema/region.schema.json
+++ b/extensions/2.0/Vendor/EXT_implicit_geometry/schema/region.schema.json
@@ -22,7 +22,7 @@
},
"heightFromSurface": {
"type": "number",
- "description": "The height of this region from the surface of the reference ellipsoid in meters.",
+ "description": "The height of this region from the surface of the reference ellipsoid in meters."
},
"slice": {
"$ref": "region.slice.schema.json",
diff --git a/extensions/2.0/Vendor/EXT_implicit_geometry/schema/region.slice.schema.json b/extensions/2.0/Vendor/EXT_implicit_geometry/schema/region.slice.schema.json
index ae5ac69349..724b9177f6 100644
--- a/extensions/2.0/Vendor/EXT_implicit_geometry/schema/region.slice.schema.json
+++ b/extensions/2.0/Vendor/EXT_implicit_geometry/schema/region.slice.schema.json
@@ -1,7 +1,7 @@
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
- "$id": "region.bounds.schema.json",
- "title": "Region Bounds",
+ "$id": "region.slice.schema.json",
+ "title": "Region Slice",
"type": "object",
"description": "A slice of an implicit region relative to an ellipsoid. Defines the subsection of the region that the implicit volume actually occupies.",
"allOf": [
diff --git a/extensions/2.0/Vendor/EXT_implicit_geometry/schema/sphere.slice.schema.json b/extensions/2.0/Vendor/EXT_implicit_geometry/schema/sphere.slice.schema.json
index 2e3c333a6c..7e822dc556 100644
--- a/extensions/2.0/Vendor/EXT_implicit_geometry/schema/sphere.slice.schema.json
+++ b/extensions/2.0/Vendor/EXT_implicit_geometry/schema/sphere.slice.schema.json
@@ -30,23 +30,23 @@
"items": {
"type": "number",
"minimum": -3.14159265359,
- "maximum": 3.14159265359,
+ "maximum": 3.14159265359
},
"minItems": 2,
"maxItems": 2,
"default": [-3.14159265359, -1.57079632679]
},
- "minAngle": {
+ "maxAngle": {
"type": "array",
"description": "The end of the slice across the angles of the sphere, in radians. The first element corresponds to the azimuthal angle (a.k.a longitude) and must be in the range [-pi, pi]. The second element corresponds to the polar angle (a.k.a. latitude) and must be in the range [-pi/2, pi/2].",
"items": {
"type": "number",
"minimum": -3.14159265359,
- "maximum": 3.14159265359,
+ "maximum": 3.14159265359
},
"minItems": 2,
"maxItems": 2,
"default": [3.14159265359, 1.57079632679]
- },
+ }
}
}
\ No newline at end of file
diff --git a/extensions/2.0/Vendor/EXT_primitive_voxels/README.md b/extensions/2.0/Vendor/EXT_primitive_voxels/README.md
index 2175ffa563..e53b7287da 100644
--- a/extensions/2.0/Vendor/EXT_primitive_voxels/README.md
+++ b/extensions/2.0/Vendor/EXT_primitive_voxels/README.md
@@ -26,22 +26,18 @@ Typically, glTF mesh primitives use the `POSITION` attribute to store positional
```
"primitives": [
{
+ "attributes": {
+ "_TEMPERATURE": 0
+ },
"mode": 2147483648,
"extensions": {
- "EXT_implicit_geometry": {
- "box": {
- "size": [2, 2, 2]
- }
- },
"EXT_primitive_voxels": {
+ "shape": 0,
"dimensions": [8, 8, 8],
"padding": {
"before": [1, 1, 1],
"after": [1, 1, 1]
- },
- "attributes": {
- "_TEMPERATURE": 0
- },
+ }
}
}
}
@@ -60,27 +56,7 @@ The relationship between `dimensions` and the grid geometry is explained in deta
### Box Grid
-A **box** grid is a Cartesian grid defined by `x`, `y`, and `z` axes with equally-sized boxes. A voxel primitive that is based on a box grid may be defined like so:
-
-```
-{
-"extensions": {
- "EXT_implicit_geometry": {
- "box": {
- "size": [2, 2, 2]
- }
- },
- "EXT_primitive_voxels": {
- "dimensions": [8, 8, 8],
- "attributes": {
- "_TEMPERATURE": 0
- },
- }
- }
-}
-```
-
-The `dimensions` correspond to the subdivisions of the box along the `x`, `y`, and `z` axes respectively.
+A **box** grid is a Cartesian grid defined by `x`, `y`, and `z` axes with equally-sized boxes. The `dimensions` correspond to the subdivisions of the box along the `x`, `y`, and `z` axes respectively.
A box grid spanning from -1 to 1 in all three axes, subdivided into two cells along each axis. The origin is in the center of the box.
@@ -98,27 +74,6 @@ A **cylinder** grid is subdivided along the radius, height, and angle ranges of
The cylinder is aligned with the `y`-axis in the primitive's local space. As such, the `height` is subdivided along that local `y`-axis. Subdivisions along the `radius` are concentric, centered around the `y`-axis and extending outwards. The `angle` is subdivided around the circumference of the cylinder.
-A voxel primitive that is based on a cylinder grid may define the `cylinder` property like so:
-
-```
-{
-"extensions": {
- "EXT_implicit_geometry": {
- "cylinder": {
- "radius": 2,
- "height": 3
- }
- },
- "EXT_primitive_voxels": {
- "dimensions": [8, 8, 8],
- "attributes": {
- "_TEMPERATURE": 0
- },
- }
- }
-}
-```
-
[TODO](image)
### Ellipsoidal Grid
@@ -178,10 +133,40 @@ The padding data must be supplied with the rest of the voxel data - this means i
This extension may be paired with the `EXT_structural_metadata` extension.
+```
{
"extensions": {
+ "EXT_implicit_geometry": {
+ geometries: [
+ {
+ "box":{
+ "size": [2, 2, 2]
+ }
+ }
+ ]
+ },
"EXT_structural_metadata": {
-
+ "schema": {
+ "classes": {
+ "voxels": {
+ "properties": {
+ "temperature": {
+ // ...
+ }
+ }
+ }
+ }
+ }
+ propertyAttributes: [
+ {
+ "class": "voxels",
+ "properties": {
+ "temperature":{
+ "attribute": "_TEMPERATURE"
+ }
+ }
+ }
+ ]
}
},
"meshes": [
@@ -191,18 +176,16 @@ This extension may be paired with the `EXT_structural_metadata` extension.
"attributes": {
"_TEMPERATURE": 0
},
- "mode": 2147483648,
"extensions": {
"EXT_primitive_voxels": {
"dimensions": [8, 8, 8],
- "bounds": {
- "min": [0.25, 0.5, 0.5],
- "max": [0.375, 0.625, 0.625]
- },
"padding": {
"before": [1, 1, 1],
"after": [1, 1, 1]
}
+ },
+ EXT_structural_metadata: {
+ propertyAttributes: [0]
}
}
}
@@ -210,6 +193,7 @@ This extension may be paired with the `EXT_structural_metadata` extension.
}
]
}
+```
## Optional vs. Required
This extension is required, meaning it should be placed in both the `extensionsUsed` list and `extensionsRequired` list.
diff --git a/extensions/2.0/Vendor/EXT_primitive_voxels/schema/mesh.primitive.EXT_primitive_voxels.schema.json b/extensions/2.0/Vendor/EXT_primitive_voxels/schema/mesh.primitive.EXT_primitive_voxels.schema.json
index 61636d8a67..98e7939131 100644
--- a/extensions/2.0/Vendor/EXT_primitive_voxels/schema/mesh.primitive.EXT_primitive_voxels.schema.json
+++ b/extensions/2.0/Vendor/EXT_primitive_voxels/schema/mesh.primitive.EXT_primitive_voxels.schema.json
@@ -3,7 +3,7 @@
"$id": "mesh.primitive.EXT_primitive_voxels.schema.json",
"title": "EXT_primitive_voxels glTF Mesh Primitive extension",
"type": "object",
- "description": "`EXT_primitive_voxels` extension for a primitive in a glTF model, to specify voxel grid geometry for volumetric data",
+ "description": "`EXT_primitive_voxels` extension for a primitive in a glTF model to indicate voxel-based volumetric data",
"allOf": [
{
"$ref": "glTFProperty.schema.json"
@@ -12,7 +12,7 @@
"properties": {
"dimensions": {
"type": "array",
- "description": "Dimensions of the voxel grid. x/y/z for a box, r/z/theta for a cylinder, lon/lat/height for an ellipsoid.",
+ "description": "Dimensions of the voxel grid. The values are interpreted with respect to the shape of the grid indicated by `EXT_implicit_geometry`.",
"items": {
"type": "integer",
"minimum": 1
@@ -21,6 +21,7 @@
"maxItems": 3
},
"padding": {
+ "description": "The optional padding of the voxels.",
"$ref": "padding.schema.json"
}
},
diff --git a/extensions/2.0/Vendor/EXT_primitive_voxels/schema/padding.schema.json b/extensions/2.0/Vendor/EXT_primitive_voxels/schema/padding.schema.json
index ad94b3ed0c..70b59e5d0b 100644
--- a/extensions/2.0/Vendor/EXT_primitive_voxels/schema/padding.schema.json
+++ b/extensions/2.0/Vendor/EXT_primitive_voxels/schema/padding.schema.json
@@ -3,7 +3,7 @@
"$id": "padding.schema.json",
"title": "Padding",
"type": "object",
- "description": "The padding property specifies how many rows of attribute data in each dimension come from neighboring grids.",
+ "description": "The padding around a voxel grid. Specifies how many rows of attribute data come from neighboring grids in each dimension.",
"allOf": [
{
"$ref": "glTFProperty.schema.json"
|