func testTurtle(d *doodle.Doodle) {
var n int
var x, dx, a, da float64
bug.Where()
t := d.New()
n, x, dx, a, da = 400, 0.1, 0, 37, 17
if flag.NArg() == 5 {
n, _ = strconv.Atoi(flag.Arg(0))
x, _ = strconv.ParseFloat(flag.Arg(1), 64)
dx, _ = strconv.ParseFloat(flag.Arg(2), 64)
a, _ = strconv.ParseFloat(flag.Arg(3), 64)
da, _ = strconv.ParseFloat(flag.Arg(4), 64)
}
println(n, x, dx, a, da)
if false {
for i := 0; i < 4; i++ {
t.Forward(2)
t.Right(90)
}
t.Doit(40, 0, .1, 90, 0)
} else {
t.Doit(n, x, dx, a, da)
}
}
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)
}