func testSpline(d *doodle.Doodle) {
list := listA
if false {
d.Plot(quad, -2, 5)
d.Plot(func(x float64) float64 {
return doodle.Poly(doodle.Vector{1, 0, -5, 0, 4}, x)
}, -2, 5)
d.Plot(cubic, -2, 3)
d.Draw(line, 1.4, 3)
d.Plot(line, 1.4, 3)
for z := 0.0; z < 2; z += 0.1 {
d.Line(doodle.Pt(-1, -2), doodle.Pt(4, 4+z))
}
d.GraphLine(list)
d.GraphPoly(list)
d.GraphQuadSpline(list)
d.GraphCubicSplineA(list)
d.GraphCubicSplineB(list)
d.GraphCubicSplineC(list)
}
bug.Where()
d.GraphLine(list)
d.GraphCubicSplineC(list)
}
func quartic(x float64) float64 {
return doodle.Poly(doodle.Vector{1, 0, -5, 0, 4}, x)
}