pygame draw arc

The function for drawing arcs in pygame is as follows:

pygame.draw.arc(surface, color, rect, start_angle, stop_angle, width)

Parameters that need to be passed in:

• surface: canvas (screen)
• color: color
• rect: The rectangle where the arc is located
• start_angle: The starting angle of the arc (0~2 in radians )
• stop_angle: arc stop angle (0~2 in radians)
• width: The default is 1 (when ≤0, nothing is drawn)

Among them, rect, start_angle and stop_angle are more difficult to understand.First of all, rect is a rectangle defined in pygame. The definition method is Rect(left, top, width, height) , which is defined by a tuple of 4 numbers. The meanings of each number are as follows, respectivelyThe coordinates of the upper left corner, the width and height of the rectangle:

We first make an inscribed circle or ellipse in the rectangle Rect (red dotted ellipse in the figure), and then combine start_angle and stop_angle to define our arc (thick red line in the figure):