![]() For example, by drawing a few lines we can create a Ponzo illusion. Red square, circle and rectangle are superimposed over a background of radial lines. ![]() Luckily, you don't need to fully understand the math theory to use the hit-test function. display stimuli formed from a variety of shapes (lines, rectangles, circles). The illusion, called the Coffer Ambiguous Figure, was created by Anthony Norcia, vision scientist at the Smith-Kettlewell Eye Research Institute in San Francisco. There is a phenomenon called the Coffer Illusion, which causes our brains to associate black, white, and gray lines with rectangles or circles. ![]() Detecting circle-rect collisions is not trivial (but not that complicated neko's solution is correct and about as simple as the code is going to get. How Many Circles Are There Optical Illusion You may be able to pop the circles by looking at the vertical lines between each rectangle.
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