Shower thought: we delay teaching kids geometry until we can trust them not to poke someone's eye out with the pointy end of a compass.

Here's a little program to do compass-and-straightedge geometrical construction on a computer:


I finally, *really* grok immediate-mode GUIs. Compare `draw_menu`.



Now I don't need variables to record where the buttons are, and code for button events lives near code for drawing the button.

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