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spatial/r{2,3}: add Norm and Norm2

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This commit is contained in:
Sebastien Binet
2020-04-01 11:26:45 +02:00
committed by GitHub
parent def9e57adc
commit 962425fcd9
4 changed files with 116 additions and 1 deletions
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41
spatial/r3/vector_test.go
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@@ -135,3 +135,44 @@ func TestCross(t *testing.T) {
})
}
}
func TestNorm(t *testing.T) {
for _, test := range []struct {
v Vec
want float64
}{
{Vec{0, 0, 0}, 0},
{Vec{0, 1, 0}, 1},
{Vec{3, -4, 12}, 13},
{Vec{1, 1e-16, 1e-32}, 1},
{Vec{-0, 4.3145006366056343748277397783556100978621924913975e-196, 4.3145006366056343748277397783556100978621924913975e-196}, 6.101625315155041e-196},
} {
t.Run("", func(t *testing.T) {
if got, want := Norm(test.v), test.want; got != want {
t.Fatalf("|%v| = %v, want %v", test.v, got, want)
}
})
}
}
func TestNorm2(t *testing.T) {
for _, test := range []struct {
v Vec
want float64
}{
{Vec{0, 0, 0}, 0},
{Vec{0, 1, 0}, 1},
{Vec{1, 1, 1}, 3},
{Vec{1, 2, 3}, 14},
{Vec{3, -4, 12}, 169},
{Vec{1, 1e-16, 1e-32}, 1},
// This will underflow and return zero.
{Vec{-0, 4.3145006366056343748277397783556100978621924913975e-196, 4.3145006366056343748277397783556100978621924913975e-196}, 0},
} {
t.Run("", func(t *testing.T) {
if got, want := Norm2(test.v), test.want; got != want {
t.Fatalf("|%v|^2 = %v, want %v", test.v, got, want)
}
})
}
}