gcode预览测试

refer/test_qmat.py

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+from PyQt6.QtGui import QMatrix4x4
+import numpy as np
+
+mat = QMatrix4x4()
+mat.translate(0.0, 0.0, -250.0)
+mat.rotate(30.0, 1.0, 0.0, 0.0)
+mat.rotate(45.0, 0.0, 0.0, 1.0)
+
+# If QMatrix4x4 passes list to uniformMatrix4fv, does it need column-major or row-major?
+# When I used numpy: ``mvp.flatten().tolist()`` -> it gave row-major. And it WORKED.
+# Let's check QMatrix4x4 data.
+data = mat.data()
+print("QMatrix4x4 data (length %d):" % len(data))
+print(data)
+