add cone size test

Author: archmoj

Diff for: test/image/baselines/gl3d_cone-sizemode.png

@@ -0,0 +1,65 @@
+{
+  "data": [
+    {
+      "type": "cone",
+      "x": [1, 2, 3],
+      "y": [1, 2, 3],
+      "z": [1, 2, 3],
+      "u": [1, 0, 0],
+      "v": [0, 3, 0],
+      "w": [0, 0, 2],
+      "sizemode": "absolute",
+      "sizeref": 4.5,
+      "anchor": "tip",
+      "colorbar": {
+        "title": { "text": "absolute<br>sizeref: 4.5" },
+        "x": 0,
+        "xanchor": "right"
+      }
+    },
+    {
+      "colorbar": {
+        "title": { "text": "scaled<br>sizeref: 0.5" }
+      },
+      "anchor": "tip",
+      "type": "cone",
+      "x": [1, 2, 3],
+      "y": [1, 2, 3],
+      "z": [1, 2, 3],
+      "u": [1, 0, 0],
+      "v": [0, 3, 0],
+      "w": [0, 0, 2],
+      "scene": "scene2"
+    }
+  ],
+  "layout": {
+    "scene": {
+      "domain": {"x": [0, 0.5]},
+      "aspectratio": {
+        "x": 1.5,
+        "y": 1.5,
+        "z": 1.5
+      },
+      "camera": {
+        "projection": {"type": "orthographic"},
+        "up": {"x": 0, "y": 1, "z": 0},
+        "eye": {"x": 0, "y": 0, "z": 3}
+      }
+    },
+    "scene2": {
+      "domain": {"x": [0.5, 1]},
+      "aspectratio": {
+        "x": 1.5,
+        "y": 1.5,
+        "z": 1.5
+      },
+      "camera": {
+        "projection": {"type": "orthographic"},
+        "up": {"x": 0, "y": 1, "z": 0},
+        "eye": {"x": 0, "y": 0, "z": 3}
+      }
+    },
+    "width": 1000,
+    "height": 500
+  }
+}