func NewLine(anchor, normal vec.Vector) *Line {
if len(anchor) != len(normal) {
panic("")
}
line := new(Line)
line.Anchor = make([]float64, len(anchor))
copy(line.Anchor, anchor)
line.Normal = normal.Normalize()
return line
}
func NewPlane(anchor, normal vec.Vector) *Plane {
if len(anchor) != len(normal) {
panic("")
}
plane := new(Plane)
plane.Anchor = make([]float64, len(anchor))
copy(plane.Anchor, anchor)
plane.Normal = normal.Normalize()
plane.anchorDotNormal = vec.Dot(plane.Anchor, plane.Normal)
return plane
}
func NewFinitePlane(anchor, coplanarX, coplanarY vec.Vector, width, height float64) *FinitePlane {
if len(anchor) != len(coplanarX) || len(anchor) != len(coplanarY) {
panic("")
}
plane := new(FinitePlane)
plane.Width = width
plane.Height = height
plane.CoplanarX = coplanarX.Normalize()
plane.CoplanarY = coplanarY.Normalize()
plane.Normal = vec.Cross(plane.CoplanarX, plane.CoplanarY)
// If coplanarX and coplanarY are colinear, we'll have issues.
if num.AlmostEqual(0.0, plane.Normal.Norm()) {
panic("")
}
return plane
}
func NewFiniteLine(anchor, normal vec.Vector, length float64) *FiniteLine {
if len(anchor) != len(normal) {
panic("")
}
line := new(FiniteLine)
line.Anchor = make([]float64, len(anchor))
copy(line.Anchor, anchor)
line.Normal = normal.Normalize()
if length < 0 {
line.Length = length * -1
line.Normal.ScaleAt(-1, line.Normal)
} else {
line.Length = length
}
return line
}