docs(examples): add rotated_rectangle example

Author: wkentaro

README.md

@@ -155,6 +155,10 @@ tiled = imgviz.tile(
 		<td><pre><a href="examples/resize.py">examples/resize.py</a></pre></td>
 		<td><img src="examples/assets/resize.jpg" width="52.21052631578947%" /></td>
 	</tr>
+	<tr>
+		<td><pre><a href="examples/rotated_rectangle.py">examples/rotated_rectangle.py</a></pre></td>
+		<td><img src="examples/assets/rotated_rectangle.jpg" width="20.0%" /></td>
+	</tr>
 	<tr>
 		<td><pre><a href="examples/rounded_rectangle.py">examples/rounded_rectangle.py</a></pre></td>
 		<td><img src="examples/assets/rounded_rectangle.jpg" width="20.0%" /></td>

examples/assets/rotated_rectangle.jpg

@@ -0,0 +1,48 @@
+#!/usr/bin/env python
+
+import matplotlib.pyplot as plt
+
+import imgviz
+
+
+def rotated_rectangle() -> None:
+    img = imgviz.data.lena()
+    height, width = img.shape[:2]
+    colors = imgviz.label_colormap()[1:]
+
+    angles = [0, 30, 60]
+    box_height = height * 0.5
+    box_width = width * 0.22
+
+    viz = img
+    for i, angle in enumerate(angles):
+        cy = height / 2
+        cx = width * (i + 1) / (len(angles) + 1)
+        color = colors[i]
+        viz = imgviz.draw.rotated_rectangle(
+            viz,
+            center=(cy, cx),
+            size=(box_height, box_width),
+            angle=angle,
+            outline=(int(color[0]), int(color[1]), int(color[2])),
+            width=5,
+        )
+        viz = imgviz.draw.text_in_rectangle(
+            viz,
+            loc="lt+",
+            text=f"angle={angle}",
+            size=18,
+            background=(int(color[0]), int(color[1]), int(color[2])),
+            yx1=(cy - box_height / 2, cx - box_width / 2),
+            yx2=(cy + box_height / 2, cx + box_width / 2),
+        )
+
+    plt.figure(dpi=200)
+    plt.imshow(viz)
+    plt.axis("off")
+
+
+if __name__ == "__main__":
+    from _base import run_example
+
+    run_example(rotated_rectangle)