Beispiel #1
0
// Required for the Spatial interface from rtreego
func (b *Bug) Bounds() *rtreego.Rect {
	r, _ := rtreego.NewRect(
		rtreego.Point{float64(b.xpos), float64(b.ypos)},
		[]float64{float64(b.width), float64(b.height)},
	)
	return r
}
Beispiel #2
0
func (s *State) PlaceNewBug(b *Bug, nearPosition Positioner) (ok bool) {
	desiredRect, _ := rtreego.NewRect(positionerToRtreePoint(nearPosition), []float64{float64(b.W()), float64(b.H())})
	x, y, ok := closestEmptyPosition(s, desiredRect)
	if !ok {
		return false
	}

	s.BugList.PushBack(b)
	b.xpos = x
	b.ypos = y
	s.BugGrid[x][y] = b
	s.BugTree.Insert(b)

	return true
}
Beispiel #3
0
func closestEmptyPosition(s *State, r *rtreego.Rect) (nx int, ny int, ok bool) {
	x := int(r.PointCoord(0))
	y := int(r.PointCoord(1))
	w := int(r.LengthsCoord(0))
	h := int(r.LengthsCoord(1))

	// These loops try to place the creature at distances at least far enough away to
	// avoid intersecting it
	for dx := -w; dx <= w; dx += w {
		for dy := -h; dy <= h; dy += h {
			nx, ny := restrictToGrid(s, x+dx, y+dy, w, h)

			restrictedRect, _ := rtreego.NewRect(rtreego.Point{float64(nx), float64(ny)}, []float64{r.LengthsCoord(0), float64(r.LengthsCoord(1))})

			if !hasIntersections(s.BugTree, restrictedRect) {
				return nx, ny, true
			}
		}
	}
	return -1, -1, false
}
Beispiel #4
0
func nativeCoordsToRtreeRect(x, y, w, h int) *rtreego.Rect {
	r, _ := rtreego.NewRect(rtreego.Point{float64(x), float64(y)}, []float64{float64(w), float64(h)})
	return r
}