blob: 1902fdf3e5cb78546fdd973fa3f022476c4137da (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
|
package physics
import (
"image"
"math"
)
type Point = image.Point
type Rectangle = image.Rectangle
func Distance(p1, p2 Point) float64 {
return math.Sqrt(math.Pow(float64(p1.X-p2.X), 2) + math.Pow(float64(p1.Y-p2.Y), 2))
}
func Length(p Point) float64 {
return Distance(p, Point{X:0,Y:0})
}
func Normalize(p Point) Point {
return p.Div(int(Length(p)))
}
func AdjacentPoints(from Point) []Point {
return []Point{
from.Add(Point{X: 0, Y: -100}),
from.Add(Point{X: 0, Y: 100}),
from.Add(Point{X: -100, Y: 0}),
from.Add(Point{X: 100, Y: 0}),
}
}
|
