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Angle

Return angle(in radians) between x, y and coordinate system passing through central point assuming Y-axis is from bottom to top, X-axis is from left to right, and angle is measured from X axis to Y-axis(angle 0 means the point is on the X axis and x is positive; angle PI/2 means the point is on the Y axis and y is positive; and so on). distance is the distance between x, y and center_x, center_y points. The function is only available for floating point data types.

float Angle(const float x, const float y, const float center_x, const float center_y);

float Angle(const float x, const float y, const float center_x, const float center_y, const float distance);