Name | HALF_PI (1.57079...) |
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Examples |
x = width/2 y = height/2 d = width * 0.8 arc(x, y, d, d, 0, QUARTER_PI) arc(x, y, d-20, d-20, 0, HALF_PI) arc(x, y, d-40, d-40, 0, PI) arc(x, y, d-60, d-60, 0, TWO_PI) |
Description | HALF_PI is a mathematical constant with the value 1.57079632679489661923. It is half the ratio of the circumference of a circle to its diameter. It is useful in combination with the trigonometric functions sin() and cos(). |
Related |
PI (3.14159...) TWO_PI (6.28318...) TAU (6.28318...) QUARTER_PI (0.78539...) |
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