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Simplified the line type.

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This commit is contained in:
Andrey Parhomenko 2023-05-28 19:45:58 +03:00
parent 75836cebe9
commit 07915de2a1
2 changed files with 6 additions and 15 deletions
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4
src/cmd/math/main.go
View file

@ -21,9 +21,7 @@ func main() {
}.Line(), }.Line(),
} }
for _, l := range lines { for _, l := range lines { fmt.Println(l) }
fmt.Println(l.Equation())
}
/*t := gx.Triangle{ /*t := gx.Triangle{
gx.Point{0, 0}, gx.Point{0, 0},
gx.Point{0, 100}, gx.Point{0, 100},

17
src/gx/line.go
View file

@ -4,17 +4,14 @@ import (
"math" "math"
) )
// The type represents mathematical equation of line. // The type represents mathematical equation of line and line itself.
type LineEquation struct { type Line struct {
K, C Float K, C Float
} }
// The type represents a line segment. // The type represents a line segment.
type LineSegment [2]Point type LineSegment [2]Point
// The type represents a line.
type Line LineSegment
// Get square of length of line segment. // Get square of length of line segment.
func (ls LineSegment) LenSqr() Float { func (ls LineSegment) LenSqr() Float {
return Sqr(ls[0].X - ls[1].X) + return Sqr(ls[0].X - ls[1].X) +
@ -26,18 +23,14 @@ func (ls LineSegment) Len() Float {
return math.Sqrt(ls.LenSqr()) return math.Sqrt(ls.LenSqr())
} }
// Returns corresponding to the line segment line. // Returns corresponding to the segment line line.
func (ls LineSegment) Line() Line { func (l LineSegment) Line() Line {
return Line(ls)
}
func (l Line) Equation() LineEquation {
p0 := l[0] p0 := l[0]
p1 := l[1] p1 := l[1]
k := (p0.Y - p1.Y) / (p0.X - p1.X) k := (p0.Y - p1.Y) / (p0.X - p1.X)
c := p0.Y - p0.X*k c := p0.Y - p0.X*k
return LineEquation{k, c} return Line{k, c}
} }