43 lines
752 B
Go
43 lines
752 B
Go
package mappingrules
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import (
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"golang.org/x/exp/constraints"
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)
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type Numeric interface {
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constraints.Integer | constraints.Float
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}
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func Abs[T Numeric](value T) T {
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return max(value, -value)
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}
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// LerpInt linearly interpolates between two integer values using
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// a float64 index value
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func LerpInt[T constraints.Integer](min, max T, t float64) T {
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t = Clamp(t, 0.0, 1.0)
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return T((1-t)*float64(min) + t*float64(max))
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}
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func Clamp[T Numeric](value, min, max T) T {
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if value < min {
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value = min
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}
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if value > max {
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value = max
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}
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return value
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}
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func clampAndShift(start, end, min, max int32) (int32, int32) {
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if start < min {
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end += min - start
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start = min
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}
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if end > max {
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start -= end - max
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end = max
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}
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return start, end
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}
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