add rotation fuction

test/data/merge.py

@@ -0,0 +1,51 @@
+#!/usr/bin/env python
+import os
+import gerberex
+from gerberex.dxf import DxfFile
+
+exts = ['GTL', 'GTO', 'GTP', 'GTS', 'GBL', 'GBO', 'GBP', 'GBS', 'TXT']
+boards=[
+    ('../../sonopi-digi/pcb/CAMOutputs/sonopi-digi.', 0, 0),
+    ('../../sonopi-digi/pcb/CAMOutputs/sonopi-digi.', 0, 22.5),
+    ('../../rcstick-f/pcb/small/CAMOutputs/rcstick-f-small.', 0, 60),
+    ('../../rcstick-f/pcb/small/CAMOutputs/rcstick-f-small.', 20, 60),
+    ('../../rcstick-f/pcb/small/CAMOutputs/rcstick-f-small.', 40, 60),
+    ('../../rcstick-f/pcb/large/CAMOutputs/rcstick-f.', 72.4, 0),
+    ('../../rcstick-f/pcb/jig/CAMOutputs/rcstick-jig.', 0, 44),
+    ('../../stm32breakout/pcb/CAMOutputs/stm32breakout.', 78.0, 59.36),
+    ('../../stm32breakout/pcb/CAMOutputs/stm32breakout.', 100.0, 59.36),
+]
+outline = 'outline.dxf'
+fill = 'fill.dxf'
+
+outputs = 'outputs/elecrow-panelized'
+
+os.chdir(os.path.dirname(__file__))
+
+for ext in exts:
+    print('merging %s: ' % ext ,end='', flush=True)
+    if ext == 'TXT':
+        ctx = gerberex.DrillComposition()
+    else:
+        ctx = gerberex.GerberComposition()
+    for board in boards:
+        file = gerberex.read(board[0] + ext)
+        file.to_metric()
+        file.offset(board[1], board[2])
+        ctx.merge(file)
+        print('.', end='', flush=True)
+    if ext != 'TXT':
+        file = gerberex.read(outline)
+        ctx.merge(file)
+    ctx.dump(outputs + '.' + ext)
+    print(' end', flush=True)
+
+print('generating GML: ', end='', flush=True)
+file = gerberex.read(outline)
+file.write(outputs + '.GML')
+print('.', end='', flush=True)
+file = gerberex.read(fill)
+file.to_metric()
+file.draw_mode = DxfFile.DM_FILL
+file.write(outputs + '-fill.GML')
+print('. end', flush=True)