39 lines
1.2 KiB
Lua
39 lines
1.2 KiB
Lua
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---clamp
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---@param v number @number
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---@param Min number @min
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---@param Max number @max
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---@return number @clamp v between Min and Max
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function math.clamp(v, Min, Max)
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Min = math.min(Min, Max)
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Max = math.max(Min, Max)
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if v < Min then
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return Min
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end
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if v > Max then
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return Max
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end
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return v
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end
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---clamp
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---@param a number @First number to compare
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---@param b number @Second number to compare
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---@param Tolerance number @Maximum allowed difference for considering them as 'nearly equal'
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---@return boolean @true if a and b are nearly equal
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function math.isNearlyEqual(a, b, Tolerance)
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if Tolerance == nil then
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Tolerance = 0.01
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end
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return math.abs(a - b) <= Tolerance
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end
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--- 获取圆上一点与圆心连接的线形成 θ 角度的另一个点（顺时针）
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---@param o FVector2D 圆点所在坐标
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---@param r float 圆的半径
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---@param p FVector2D 圆上的一点
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---@param t float 跟 <p> 到 <o> 形成夹角为 t 的线，弧度值
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function math.getCirclePoint(o, r, p, t)
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local angle = math.atan((p.Y - o.Y) / (p.X - o.X)) + t
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return { X = o.X + r * math.cos(angle), Y = o.Y + r * math.sin(angle) };
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end |