135 lines
1.8 KiB
Go
135 lines
1.8 KiB
Go
package govector
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import (
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"fmt"
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"math"
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"testing"
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)
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func TestSubMag(t *testing.T) {
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p1 := Point2d{10, 10}
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p2 := Point2d{7, 6}
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v := p1.Sub(p2)
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if v != (Vector2d{3, 4}) {
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t.Errorf("Sub Error")
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}
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m := v.Mag()
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if m != 5 {
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t.Errorf("Mag Error")
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}
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}
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func TestScale(t *testing.T) {
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v := Vector2d{3, 4}
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m := v.Mag()
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if m != 5 {
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t.Errorf("Mag Error")
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}
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m2 := v.Scale(2)
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fmt.Printf("%v\n", m2)
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if m2.Mag() != 10 {
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t.Errorf("Mag Error")
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}
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}
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func TestAdd(t *testing.T) {
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p := Point2d{10, 10}
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v := Vector2d{3, 4}
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m := p.Add(v)
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fmt.Printf("%v\n", m)
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if m.X != 13 && m.Y != 14 {
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t.Errorf("Add Error")
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}
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}
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func TestNormalize(t *testing.T) {
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v := Vector2d{3, 4}
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vn := v.Normalize()
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if vn.Mag() != 1 {
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t.Errorf("Normalize Error")
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}
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v0 := Vector2d{0, 0}
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vn0 := v0.Normalize()
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if vn0.Mag() != 0 {
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t.Errorf("Normalize Error")
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}
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}
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func TestDot(t *testing.T) {
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v1 := Vector2d{0, 5}
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v2 := Vector2d{5, 0}
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d := v1.Dot(v2)
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if d != 0 {
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t.Errorf("Dot Error")
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}
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v1 = Vector2d{1, 5}
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v2 = Vector2d{5, 0}
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d = v1.Dot(v2)
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if d < 0 {
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t.Errorf("Dot Error")
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}
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v1 = Vector2d{-1, 5}
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v2 = Vector2d{5, 0}
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d = v1.Dot(v2)
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if d > 0 {
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t.Errorf("Dot Error")
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}
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v1 = Vector2d{5, 5}
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v2 = Vector2d{5, 0}
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v1 = v1.Normalize()
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v2 = v2.Normalize()
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d = v1.Dot(v2)
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fmt.Printf("%v\n", d)
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if math.Abs(d-math.Acos(math.Pi/4)) < 0.0001 {
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t.Errorf("Dot Error")
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}
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}
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func TestIntersection(t *testing.T) {
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p1 := Point2d{0, 5}
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p2 := Point2d{5, 0}
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v1 := Vector2d{10, 0}
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v2 := Vector2d{0, 10}
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i, p := Intersection(p1, p2, v1, v2)
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fmt.Printf("%v %v\n", i, p)
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if !i {
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t.Errorf("Intersection Error")
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}
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p1 = Point2d{20, 5}
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p2 = Point2d{5, 0}
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v1 = Vector2d{10, 0}
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v2 = Vector2d{0, 10}
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i, p = Intersection(p1, p2, v1, v2)
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fmt.Printf("%v %v\n", i, p)
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if i {
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t.Errorf("Intersection Error")
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}
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}
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