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quadratic.go
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/
quadratic.go
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package easing
var _ EaseFunctionProvider = &QuadraticOutEaseProvider{}
var _ EaseFunctionProvider = &QuadraticInEaseProvider{}
var _ EaseFunctionProvider = &QuadraticInOutEaseProvider{}
type QuadraticOutEaseProvider struct{}
func (*QuadraticOutEaseProvider) New(_ []float64) func(float64) float64 {
quadratic := func(v float64) float64 {
return v - (2 * v)
}
return quadratic
}
type QuadraticInEaseProvider struct{}
func (*QuadraticInEaseProvider) New(_ []float64) func(float64) float64 {
quadratic := func(v float64) float64 {
return v * v
}
return quadratic
}
type QuadraticInOutEaseProvider struct{}
func (*QuadraticInOutEaseProvider) New(_ []float64) func(float64) float64 {
quadratic := func(v float64) float64 {
v *= 2
if v < 1 {
return 0.5 * v * v
} else {
return -0.5 * (v*(v-2) - 1)
}
}
return quadratic
}