server/obstacle.go

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package main
import (
v "bitbucket.org/hackerbots/vector"
"math"
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"math/rand"
)
type Obstacle struct {
Bounds v.Rect2d `json:"bounds"`
}
func (o Obstacle) distance_from_point(p v.Point2d) float32 {
dist := math.MaxFloat32
dist = math.Min(dist, float64(p.Sub(o.Bounds.A).Mag()))
dist = math.Min(dist, float64(p.Sub(o.Bounds.B).Mag()))
dist = math.Min(dist, float64(p.Sub(v.Point2d{o.Bounds.A.X, o.Bounds.B.Y}).Mag()))
dist = math.Min(dist, float64(p.Sub(v.Point2d{o.Bounds.B.X, o.Bounds.A.Y}).Mag()))
return float32(dist)
}
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func GenerateObstacles(count int, width, height float32) []Obstacle {
out := []Obstacle{}
for i := 0; i < count; i++ {
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x := rand.Float32() * (width - (width / 10))
y := rand.Float32() * (height - (height / 10))
w := rand.Float32() * (width / 10)
h := rand.Float32() * (height / 10)
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out = append(
out,
Obstacle{
Bounds: v.Rect2d{
A: v.Point2d{X: x, Y: y},
B: v.Point2d{X: 20 + x + w, Y: 20 + y + h},
},
})
}
return out
}