func TestBoundingBoxSplit(t *testing.T) {
box := &BoundingBox{
MinVolume: [3]float64{-3.18, -3.96, -1.77},
MaxVolume: [3]float64{4.58, 1.74, 4.56},
}
ray := &ray.Ray{
Start: *maths.NewVec3(4.49, -7.3, 5.53),
Direction: *maths.NewVec3(-0.60, 0.5, -0.62),
}
ray.Init()
if !box.Intersect(ray) {
t.Error("ray should intersect big box")
}
left, right := box.Split(2, 1.39)
assertEqualVectors(t, maths.NewVec3(-3.18, -3.96, -1.77), maths.NewVec3Array(left.MinVolume))
assertEqualVectors(t, maths.NewVec3(-3.18, -3.96, 1.39), maths.NewVec3Array(right.MinVolume))
assertEqualVectors(t, maths.NewVec3(4.58, 1.74, 1.39), maths.NewVec3Array(left.MaxVolume))
assertEqualVectors(t, maths.NewVec3(4.58, 1.74, 4.56), maths.NewVec3Array(right.MaxVolume))
if box.IntersectWall(2, 1.39, ray) {
t.Error("ray shouldn't intersect the wall")
}
if right.Intersect(ray) {
t.Error("ray shouldn't intersect right")
}
if !left.Intersect(ray) {
t.Error("ray should intersect left")
}
}
func TestGetBoundingBox(t *testing.T) {
meshData := []byte(`{
"vertices": [
{
"normal": [0, 0, 1],
"coordinates": [-1, -2, 0]
},
{
"normal": [0, 0, 1],
"coordinates": [1, 5, -8]
},
{
"normal": [0, 0, 1],
"coordinates": [1, 2, 0]
},
{
"normal": [0, 0, 1],
"coordinates": [1, 1, 0]
}
],
"faces": [
{
"vertices": [0, 1, 2],
"material": 42
},
{
"vertices": [1, 2, 3],
"material": 42
}
]
}`)
mesh := &Mesh{}
err := json.Unmarshal(meshData, &mesh)
if err != nil {
t.Fatalf("Error reading json: %s\n", err)
return
}
mesh.Init()
bbox := mesh.GetBoundingBox()
assertEqualVectors(t, maths.NewVec3(1, 5, 0), maths.NewVec3Array(bbox.MaxVolume))
assertEqualVectors(t, maths.NewVec3(-1, -2, -8), maths.NewVec3Array(bbox.MinVolume))
}
// String returns the string representation of the boundingBox in the form of bbox[min: _, max: _]
func (b *BoundingBox) String() string {
return fmt.Sprintf("bbox[min: %s, max: %s]", maths.NewVec3Array(b.MinVolume), maths.NewVec3Array(b.MaxVolume))
}