mirror of https://github.com/tidwall/tile38.git
67 lines
1.6 KiB
Go
67 lines
1.6 KiB
Go
|
package poly
|
||
|
|
|
||
|
|
import "testing"
|
||
|
|
|
||
|
|
func testRayRay(t *testing.T, p, a, b Point, expect rayres) {
|
||
|
|
res := raycast(p, a, b)
|
||
|
|
if res != expect {
|
||
|
|
t.Fatalf("1) %v,%v,%v = %s, expect %s", p, a, b, res, expect)
|
||
|
|
}
|
||
|
|
res = raycast(p, a, b)
|
||
|
|
if res != expect {
|
||
|
|
t.Fatalf("1) %v,%v,%v = %s, expect %s", p, b, a, res, expect)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func TestRayHorizontal(t *testing.T) {
|
||
|
|
for x := float64(-1); x <= 4+1; x++ {
|
||
|
|
expect := on
|
||
|
|
if x < 0 {
|
||
|
|
expect = left
|
||
|
|
} else if x > 4 {
|
||
|
|
expect = out
|
||
|
|
}
|
||
|
|
testRayRay(t, P(x, 0), P(0, 0), P(4, 0), expect)
|
||
|
|
}
|
||
|
|
for x := float64(-1); x <= 4+1; x++ {
|
||
|
|
expect := out
|
||
|
|
testRayRay(t, P(x, -1), P(0, 0), P(4, 0), expect)
|
||
|
|
}
|
||
|
|
for x := float64(-1); x <= 4+1; x++ {
|
||
|
|
expect := out
|
||
|
|
testRayRay(t, P(x, +1), P(0, 0), P(4, 0), expect)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func TestRayVertical(t *testing.T) {
|
||
|
|
for y := float64(-1); y <= 4+1; y++ {
|
||
|
|
expect := on
|
||
|
|
if y < 0 || y > 4 {
|
||
|
|
expect = out
|
||
|
|
}
|
||
|
|
testRayRay(t, P(0, y), P(0, 0), P(0, 4), expect)
|
||
|
|
}
|
||
|
|
for y := float64(-1); y <= 4+1; y++ {
|
||
|
|
expect := left
|
||
|
|
if y < 0 || y > 4 {
|
||
|
|
expect = out
|
||
|
|
}
|
||
|
|
testRayRay(t, P(-1, y), P(0, 0), P(0, 4), expect)
|
||
|
|
}
|
||
|
|
for y := float64(-1); y <= 4+1; y++ {
|
||
|
|
expect := out
|
||
|
|
testRayRay(t, P(+1, y), P(0, 0), P(0, 4), expect)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func TestRayAngled(t *testing.T) {
|
||
|
|
testRayRay(t, P(1, 3), P(0, 4), P(4, 0), on)
|
||
|
|
testRayRay(t, P(0, 4), P(0, 4), P(4, 0), on)
|
||
|
|
testRayRay(t, P(4, 0), P(0, 4), P(4, 0), on)
|
||
|
|
testRayRay(t, P(1, 4), P(0, 4), P(4, 0), out)
|
||
|
|
testRayRay(t, P(5, 0), P(0, 4), P(4, 0), out)
|
||
|
|
testRayRay(t, P(-1, 4), P(0, 4), P(4, 0), left)
|
||
|
|
testRayRay(t, P(3, 0), P(0, 4), P(4, 0), left)
|
||
|
|
testRayRay(t, P(2, 2), P(0, 4), P(4, 0), on)
|
||
|
|
}
|