Kernel rig: inspect cases, the centre of mass and volume of a box, of a box and cylinder, and an unknown body refused

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/kernel-cases/inspect/cov-center-of-mass-box-and-cylinder/expected.json

@@ -0,0 +1,36 @@
+{
+ "sources": [],
+ "what": "the centre of mass of a box and a cylinder together",
+ "source": "analytic",
+ "method": "box 40 x 30 x 20 with a corner at the origin (V 24000 at (20,15,10)) and a cylinder r 5, h 10 on (60,0,0) (V 250 pi = 785.40 at (60,0,5)): the volume-weighted mean (21.2675, 14.5247, 9.8416), V = 24000 + 250 pi",
+ "results": [
+  {
+   "command": 2,
+   "pointer": "/center",
+   "value": [
+    21.267517524987444,
+    14.524680928129708,
+    9.84156030937657
+   ]
+  },
+  {
+   "command": 2,
+   "pointer": "/volume",
+   "value": 24785.398163397447
+  },
+  {
+   "command": 2,
+   "pointer": "/bodies/1/center",
+   "value": [
+    60,
+    0,
+    5
+   ]
+  },
+  {
+   "command": 2,
+   "pointer": "/bodies/1/volume",
+   "value": 785.3981633974482
+  }
+ ]
+}

tests/kernel-cases/inspect/cov-center-of-mass-box-and-cylinder/recipe.json

@@ -0,0 +1,32 @@
+{
+ "commands": [
+  {
+   "command": "solid.box",
+   "params": {
+    "length": 40,
+    "width": 30,
+    "height": 20,
+    "body_name": "Box",
+    "operation": "new"
+   }
+  },
+  {
+   "command": "solid.cylinder",
+   "params": {
+    "base": [
+     60,
+     0,
+     0
+    ],
+    "radius": 5,
+    "height": 10,
+    "body_name": "Cyl",
+    "operation": "new"
+   }
+  },
+  {
+   "command": "inspect.center_of_mass",
+   "params": {}
+  }
+ ]
+}

tests/kernel-cases/inspect/cov-center-of-mass-box/expected.json

@@ -0,0 +1,22 @@
+{
+ "sources": [],
+ "what": "the centre of mass of a box",
+ "source": "analytic",
+ "method": "box 40 x 30 x 20 with a corner at the origin: the middle (20,15,10), V = 40 x 30 x 20 = 24000",
+ "results": [
+  {
+   "command": 1,
+   "pointer": "/center",
+   "value": [
+    20,
+    15,
+    10
+   ]
+  },
+  {
+   "command": 1,
+   "pointer": "/volume",
+   "value": 24000.0
+  }
+ ]
+}

tests/kernel-cases/inspect/cov-center-of-mass-box/recipe.json

@@ -0,0 +1,18 @@
+{
+ "commands": [
+  {
+   "command": "solid.box",
+   "params": {
+    "length": 40,
+    "width": 30,
+    "height": 20,
+    "body_name": "Box",
+    "operation": "new"
+   }
+  },
+  {
+   "command": "inspect.center_of_mass",
+   "params": {}
+  }
+ ]
+}

tests/kernel-cases/inspect/cov-center-of-mass-refuses-an-unknown-body/expected.json

@@ -0,0 +1,8 @@
+{
+ "sources": [],
+ "what": "the centre of mass of a body that is not there",
+ "source": "analytic",
+ "method": "box 40 x 30 x 20 with a corner at the origin; no body `Nope`: refused",
+ "outcome": "refused",
+ "refusal": "no such bodies"
+}

tests/kernel-cases/inspect/cov-center-of-mass-refuses-an-unknown-body/recipe.json

@@ -0,0 +1,22 @@
+{
+ "commands": [
+  {
+   "command": "solid.box",
+   "params": {
+    "length": 40,
+    "width": 30,
+    "height": 20,
+    "body_name": "Box",
+    "operation": "new"
+   }
+  },
+  {
+   "command": "inspect.center_of_mass",
+   "params": {
+    "bodies": [
+     "Nope"
+    ]
+   }
+  }
+ ]
+}