mirror of https://github.com/tidwall/tile38.git
114 lines
2.6 KiB
Go
114 lines
2.6 KiB
Go
package poly
|
|
|
|
import "testing"
|
|
|
|
func testRayInside(t *testing.T, p Point, ps []Point, expect bool) {
|
|
res := insideshpext(p, ps, true)
|
|
if res != expect {
|
|
t.Fatalf("{%v,%v} = %t, expect %t", p.X, p.Y, res, expect)
|
|
}
|
|
}
|
|
|
|
func TestRayInside(t *testing.T) {
|
|
strange := []Point{P(0, 0), P(0, 3), P(4, -3), P(4, 0), P(0, 0)}
|
|
|
|
// on the edge
|
|
testRayInside(t, P(0, 0), strange, true)
|
|
testRayInside(t, P(0, 3), strange, true)
|
|
|
|
testRayInside(t, P(4, -3), strange, true)
|
|
testRayInside(t, P(4, -2), strange, true)
|
|
testRayInside(t, P(3, 0), strange, true)
|
|
testRayInside(t, P(1, 0), strange, true)
|
|
|
|
// ouside by just a tad
|
|
testRayInside(t, P(-0.1, 0), strange, false)
|
|
testRayInside(t, P(-0.1, -0.1), strange, false)
|
|
testRayInside(t, P(0, 3.1), strange, false)
|
|
testRayInside(t, P(0.1, 3.1), strange, false)
|
|
testRayInside(t, P(-0.1, 3), strange, false)
|
|
testRayInside(t, P(4, -3.1), strange, false)
|
|
testRayInside(t, P(3.9, -3), strange, false)
|
|
testRayInside(t, P(4.1, -2), strange, false)
|
|
testRayInside(t, P(3, 0.1), strange, false)
|
|
testRayInside(t, P(1, -0.1), strange, false)
|
|
}
|
|
|
|
var texterior = Polygon{
|
|
P(0, 0),
|
|
P(0, 6),
|
|
P(12, -6),
|
|
P(12, 0),
|
|
P(0, 0),
|
|
}
|
|
var tholeA = Polygon{
|
|
P(1, 1),
|
|
P(1, 2),
|
|
P(2, 2),
|
|
P(2, 1),
|
|
}
|
|
var tholeB = Polygon{
|
|
P(11, -1),
|
|
P(11, -3),
|
|
P(9, -1),
|
|
}
|
|
var tholes = []Polygon{tholeA, tholeB}
|
|
|
|
func TestRayExteriorHoles(t *testing.T) {
|
|
|
|
type point struct {
|
|
p Point
|
|
ok bool
|
|
}
|
|
|
|
points := []point{
|
|
{P(.5, 3), true},
|
|
{P(11.5, -4.5), true},
|
|
{P(6, 0), true},
|
|
|
|
{P(3.5, .5), true},
|
|
{P(1.5, 1.5), false},
|
|
{P(10.5, -1.5), false},
|
|
{P(-2, 0), false},
|
|
{P(0, -2), false},
|
|
{P(8, -3), false},
|
|
{P(8, 1), false},
|
|
{P(14, -1), false},
|
|
}
|
|
// add the edges, all should be inside
|
|
for i := 0; i < len(texterior); i++ {
|
|
points = append(points, point{texterior[i], true})
|
|
}
|
|
for i := 0; i < len(tholeA); i++ {
|
|
points = append(points, point{tholeA[i], true})
|
|
}
|
|
for i := 0; i < len(tholeB); i++ {
|
|
points = append(points, point{tholeB[i], true})
|
|
}
|
|
|
|
for i := 0; i < len(points); i++ {
|
|
ok := points[i].p.Inside(texterior, tholes)
|
|
if ok != points[i].ok {
|
|
t.Fatalf("{%v,%v} = %t, expect %t", points[i].p.X, points[i].p.Y, ok, points[i].ok)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestInsideShapes(t *testing.T) {
|
|
if texterior.Inside(texterior, nil) == false {
|
|
t.Fatalf("expect true, got false")
|
|
}
|
|
if texterior.Inside(texterior, tholes) == true {
|
|
t.Fatalf("expect false, got true")
|
|
}
|
|
if tholeA.Inside(texterior, nil) == false {
|
|
t.Fatalf("expect true, got false")
|
|
}
|
|
if tholeB.Inside(texterior, nil) == false {
|
|
t.Fatalf("expect true, got false")
|
|
}
|
|
if tholeA.Inside(tholeB, nil) == true {
|
|
t.Fatalf("expect false, got true")
|
|
}
|
|
}
|