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