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wip line tests

This commit is contained in:
Ben Cragg 2019-04-03 12:03:07 +01:00
parent e99ac56daa
commit faf6558294
1 changed files with 20 additions and 14 deletions
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34
geometry_test.go
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@ -1216,24 +1216,24 @@ func TestLine_Rotated(t *testing.T) {
args args
want pixel.Line
}{
// {
// name: "Rotating around line center",
// fields: fields{A: pixel.V(1, 1), B: pixel.V(3, 3)},
// args: args{around: pixel.V(2, 2), angle: 2 * math.Pi},
// want: pixel.L(pixel.V(1, 1), pixel.V(3, 3)),
// },
{
name: "Rotating around line center",
fields: fields{A: pixel.V(1, 1), B: pixel.V(3, 3)},
args: args{around: pixel.V(2, 2), angle: math.Pi},
want: pixel.L(pixel.V(3, 3), pixel.V(1, 1)),
},
{
name: "Rotating around x-y origin",
fields: fields{A: pixel.V(1, 1), B: pixel.V(3, 3)},
args: args{around: pixel.V(0, 0), angle: 2 * math.Pi},
args: args{around: pixel.V(0, 0), angle: math.Pi},
want: pixel.L(pixel.V(-1, -1), pixel.V(-3, -3)),
},
// {
// name: "Rotating around line end",
// fields: fields{A: pixel.V(1, 1), B: pixel.V(3, 3)},
// args: args{around: pixel.V(1, 1), angle: 2 * math.Pi},
// want: pixel.L(pixel.V(1, 1), pixel.V(-2, -2)),
// },
{
name: "Rotating around line end",
fields: fields{A: pixel.V(1, 1), B: pixel.V(3, 3)},
args: args{around: pixel.V(1, 1), angle: math.Pi},
want: pixel.L(pixel.V(1, 1), pixel.V(-1, -1)),
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
@ -1241,7 +1241,13 @@ func TestLine_Rotated(t *testing.T) {
A: tt.fields.A,
B: tt.fields.B,
}
if got := l.Rotated(tt.args.around, tt.args.angle); !reflect.DeepEqual(got, tt.want) {
// Have to round the results, due to floating-point in accuracies. Results are correct to approximately
// 10 decimal places.
got := l.Rotated(tt.args.around, tt.args.angle)
if math.Round(got.A.X) != tt.want.A.X ||
math.Round(got.B.X) != tt.want.B.X ||
math.Round(got.A.Y) != tt.want.A.Y ||
math.Round(got.B.Y) != tt.want.B.Y {
t.Errorf("Line.Rotated() = %v, want %v", got, tt.want)
}
})