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roblouie | Transforming Mouse Coordinates to Canvas Coordinates
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javascript - Returning un-transformed mouse coordinates after rotating an object on html5 canvas - Stack Overflow
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html - How to show mouse coordinates over canvas using pure javascript in tooltip form? - Stack Overflow
Move canvas around
Draw Rectangle and Circle in Canvas | by bytefish | JavaScript in Plain English
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Lesson 4: User Input with the Mouse | EARTH 801: Special Topics in Earth Sciences
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