Fix not taking np.array for single colors (#2569)

plus fix bad error message when supplying single dimensional position
array to line_segments

Fixes #2486
*  #2486

### Checklist
* [x] I have read and agree to [Contributor
Guide](https://github.com/rerun-io/rerun/blob/main/CONTRIBUTING.md) and
the [Code of
Conduct](https://github.com/rerun-io/rerun/blob/main/CODE_OF_CONDUCT.md)
* [x] I have tested https://demo.rerun.io/pr/2569 (if applicable)

<!-- This line will get updated when the PR build summary job finishes.
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PR Build Summary: https://build.rerun.io/pr/2569

<!-- pr-link-docs:start -->
Docs preview: https://rerun.io/preview/89f20b6/docs
Examples preview: https://rerun.io/preview/89f20b6/examples
<!-- pr-link-docs:end -->

rerun_py/rerun_sdk/rerun/components/color.py

@@ -16,6 +16,8 @@
 class ColorRGBAArray(pa.ExtensionArray):  # type: ignore[misc]
     def from_numpy(array: npt.NDArray[np.uint8]) -> ColorRGBAArray:
         """Build a `ColorRGBAArray` from an numpy array."""
+        if array.ndim == 1:
+            array = np.reshape(array, (1, -1))
         storage = pa.array(u8_array_to_rgba(array), type=ColorRGBAType.storage_type)
         # TODO(john) enable extension type wrapper
         # return cast(ColorRGBAArray, pa.ExtensionArray.from_storage(ColorRGBAType(), storage))

rerun_py/rerun_sdk/rerun/log/arrow.py

@@ -78,8 +78,8 @@ def log_arrow(
         vector = np.require(vector, dtype="float32")
         instanced["rerun.arrow3d"] = Arrow3DArray.from_numpy(origin.reshape(1, 3), vector.reshape(1, 3))
 
-    if color:
-        colors = _normalize_colors([color])
+    if color is not None:
+        colors = _normalize_colors(color)
         instanced["rerun.colorrgba"] = ColorRGBAArray.from_numpy(colors)
 
     if label:

rerun_py/rerun_sdk/rerun/log/bounding_box.py

@@ -105,8 +105,8 @@ def log_obb(
         else:
             raise TypeError("rotation should be 1x4")
 
-    if color:
-        colors = _normalize_colors([color])
+    if color is not None:
+        colors = _normalize_colors(color)
         instanced["rerun.colorrgba"] = ColorRGBAArray.from_numpy(colors)
 
     # We store the stroke_width in radius

rerun_py/rerun_sdk/rerun/log/lines.py

@@ -105,8 +105,8 @@ def log_line_strip(
         else:
             raise TypeError("Positions should be either Nx2 or Nx3")
 
-    if color:
-        colors = _normalize_colors([color])
+    if color is not None:
+        colors = _normalize_colors(color)
         instanced["rerun.colorrgba"] = ColorRGBAArray.from_numpy(colors)
 
     # We store the stroke_width in radius
@@ -190,13 +190,13 @@ def log_line_segments(
         # If not a multiple of 2, drop the last row
         if len(positions) % 2:
             positions = positions[:-1]
-        if positions.shape[1] == 2:
+        if positions.ndim > 1 and positions.shape[1] == 2:
             # Reshape even-odd pairs into a collection of line-strips of length2
             # [[a00, a01], [a10, a11], [b00, b01], [b10, b11]]
             # -> [[[a00, a01], [a10, a11]], [[b00, b01], [b10, b11]]]
             positions = positions.reshape([len(positions) // 2, 2, 2])
             instanced["rerun.linestrip2d"] = LineStrip2DArray.from_numpy_arrays(positions)
-        elif positions.shape[1] == 3:
+        elif positions.ndim > 1 and positions.shape[1] == 3:
             # Same as above but for 3d points
             positions = positions.reshape([len(positions) // 2, 2, 3])
             instanced["rerun.linestrip3d"] = LineStrip3DArray.from_numpy_arrays(positions)
@@ -205,8 +205,8 @@ def log_line_segments(
 
     # The current API splats both color and stroke-width, though the data-model doesn't
     # require that we do so.
-    if color:
-        colors = _normalize_colors([color])
+    if color is not None:
+        colors = _normalize_colors(color)
         splats["rerun.colorrgba"] = ColorRGBAArray.from_numpy(colors)
 
     # We store the stroke_width in radius

rerun_py/rerun_sdk/rerun/log/points.py

@@ -116,8 +116,8 @@ def log_point(
         else:
             raise TypeError("Position must have a total size of 2 or 3")
 
-    if color:
-        colors = _normalize_colors([color])
+    if color is not None:
+        colors = _normalize_colors(color)
         instanced["rerun.colorrgba"] = ColorRGBAArray.from_numpy(colors)
 
     if radius:

rerun_py/rerun_sdk/rerun/log/rects.py

@@ -85,8 +85,8 @@ def log_rect(
 
     instanced["rerun.rect2d"] = Rect2DArray.from_numpy_and_format(rects, rect_format)
 
-    if color:
-        colors = _normalize_colors([color])
+    if color is not None:
+        colors = _normalize_colors(color)
         instanced["rerun.colorrgba"] = ColorRGBAArray.from_numpy(colors)
 
     if label:

rerun_py/rerun_sdk/rerun/log/scalar.py

@@ -130,8 +130,8 @@ def log_scalar(
     if label:
         instanced["rerun.label"] = LabelArray.new([label])
 
-    if color:
-        colors = _normalize_colors([color])
+    if color is not None:
+        colors = _normalize_colors(color)
         instanced["rerun.colorrgba"] = ColorRGBAArray.from_numpy(colors)
 
     if radius:

rerun_py/rerun_sdk/rerun/log/text.py

@@ -117,8 +117,8 @@ def log_text_entry(
     else:
         logging.warning(f"Null  text entry in log_text_entry('{entity_path}') will be dropped.")
 
-    if color:
-        colors = _normalize_colors([color])
+    if color is not None:
+        colors = _normalize_colors(color)
         instanced["rerun.colorrgba"] = ColorRGBAArray.from_numpy(colors)
 
     if ext:

rerun_py/rerun_sdk/rerun/log/text_internal.py

@@ -92,8 +92,8 @@ def log_text_entry_internal(
     else:
         logging.warning(f"Null  text entry in log_text_entry('{entity_path}') will be dropped.")
 
-    if color:
-        colors = _normalize_colors([color])
+    if color is not None:
+        colors = _normalize_colors(color)
         instanced["rerun.colorrgba"] = ColorRGBAArray.from_numpy(colors)
 
     if splats: