68 lines
1.6 KiB
Go
68 lines
1.6 KiB
Go
package chart
|
|
|
|
import (
|
|
"fmt"
|
|
"math"
|
|
)
|
|
|
|
// ContinuousRange represents a boundary for a set of numbers.
|
|
type ContinuousRange struct {
|
|
Min float64
|
|
Max float64
|
|
Domain int
|
|
}
|
|
|
|
// IsZero returns if the ContinuousRange has been set or not.
|
|
func (r ContinuousRange) IsZero() bool {
|
|
return (r.Min == 0 || math.IsNaN(r.Min)) &&
|
|
(r.Max == 0 || math.IsNaN(r.Max)) &&
|
|
r.Domain == 0
|
|
}
|
|
|
|
// GetMin gets the min value for the continuous range.
|
|
func (r ContinuousRange) GetMin() float64 {
|
|
return r.Min
|
|
}
|
|
|
|
// SetMin sets the min value for the continuous range.
|
|
func (r *ContinuousRange) SetMin(min float64) {
|
|
r.Min = min
|
|
}
|
|
|
|
// GetMax returns the max value for the continuous range.
|
|
func (r ContinuousRange) GetMax() float64 {
|
|
return r.Max
|
|
}
|
|
|
|
// SetMax sets the max value for the continuous range.
|
|
func (r *ContinuousRange) SetMax(max float64) {
|
|
r.Max = max
|
|
}
|
|
|
|
// GetDelta returns the difference between the min and max value.
|
|
func (r ContinuousRange) GetDelta() float64 {
|
|
return r.Max - r.Min
|
|
}
|
|
|
|
// GetDomain returns the range domain.
|
|
func (r ContinuousRange) GetDomain() int {
|
|
return r.Domain
|
|
}
|
|
|
|
// SetDomain sets the range domain.
|
|
func (r *ContinuousRange) SetDomain(domain int) {
|
|
r.Domain = domain
|
|
}
|
|
|
|
// String returns a simple string for the ContinuousRange.
|
|
func (r ContinuousRange) String() string {
|
|
return fmt.Sprintf("ContinuousRange [%.2f,%.2f] => %d", r.Min, r.Max, r.Domain)
|
|
}
|
|
|
|
// Translate maps a given value into the ContinuousRange space.
|
|
func (r ContinuousRange) Translate(value float64) int {
|
|
normalized := value - r.Min
|
|
ratio := normalized / r.GetDelta()
|
|
return int(math.Ceil(ratio * float64(r.Domain)))
|
|
}
|