天体観測 (天体观测) 夏代孝明 (ナツシロタカアキ) 专辑：フィルライト 语种： 日语
Users can sketch in my app using a very simple tool (move mouse while holding LMB). This results in a series of mousemove events and I record the cursor lo开发者_运维问答cation at each event. The resu
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