34 lines
824 B
Go
34 lines
824 B
Go
package geo
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import (
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"math"
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)
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// RounderFunc is a function which converts a floating point number into an
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// integer.
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type RounderFunc func(float64) int64
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// Round is helper for calling the RounderFunc and converting the result to an
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// int.
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func (rf RounderFunc) Round(f float64) int {
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return int(rf(f))
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}
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// A few RounderFuncs which can be used. Set the Rounder global variable to pick
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// one.
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var (
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Floor RounderFunc = func(f float64) int64 { return int64(math.Floor(f)) }
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Ceil RounderFunc = func(f float64) int64 { return int64(math.Ceil(f)) }
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Round RounderFunc = func(f float64) int64 {
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if f < 0 {
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f = math.Ceil(f - 0.5)
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}
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f = math.Floor(f + 0.5)
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return int64(f)
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}
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)
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// Rounder is the RounderFunc which will be used by all functions and methods in
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// this package when needed.
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var Rounder = Ceil
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