Golang geos.Geometry类代码示例

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本文整理汇总了Golang中github.com/paulsmith/gogeos/geos.Geometry类的典型用法代码示例。如果您正苦于以下问题：Golang Geometry类的具体用法？Golang Geometry怎么用？Golang Geometry使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。

在下文中一共展示了Geometry类的8个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的Golang代码示例。

示例1: ToGjFeature

func ToGjFeature(g *geos.Geometry) (gjFeature, error) {
	var gjf gjFeature
	gjf.Type = "Feature"
	gjf.Geometry.Type = "MultiPolygon"
	ngeoms, _ := g.NGeometry()
	gjf.Geometry.Coords = make([][][][]float64, ngeoms)

	for i := 0; i < ngeoms; i++ {
		subg, err := g.Geometry(i)
		if err != nil {
			return gjf, err
		}
		holes, err := subg.Holes()
		if err != nil {
			return gjf, err
		}
		gjf.Geometry.Coords[i] = make([][][]float64, 1+len(holes))

		shell, err := subg.Shell()
		if err != nil {
			return gjf, err
		}

		coords, err := shell.Coords()
		if err != nil {
			return gjf, err
		}
		gjf.Geometry.Coords[i][0] = make([][]float64, len(coords))
		for j, coord := range coords {
			gjf.Geometry.Coords[i][0][j] = make([]float64, 2)
			gjf.Geometry.Coords[i][0][j][0] = coord.X
			gjf.Geometry.Coords[i][0][j][1] = coord.Y
		}

		for k, hole := range holes {
			coords, err := hole.Coords()
			if err != nil {
				return gjf, err
			}

			gjf.Geometry.Coords[i][1+k] = make([][]float64, len(coords))
			for j, coord := range coords {
				gjf.Geometry.Coords[i][1+k][j] = make([]float64, 2)
				gjf.Geometry.Coords[i][1+k][j][0] = coord.X
				gjf.Geometry.Coords[i][1+k][j][1] = coord.Y
			}
		}
	}
	return gjf, nil
}

开发者ID:fg1，项目名称:mugiss，代码行数:50，代码来源:geojson.go

示例2: drawPolygon

func drawPolygon(ctxt draw2d.GraphicContext, g *geos.Geometry, fillColor color.Color, strokeColor color.Color, width float64, scale func(x, y float64) (float64, float64)) {
	ctxt.SetFillColor(fillColor)
	ctxt.SetStrokeColor(strokeColor)
	ctxt.SetLineWidth(width)
	// exterior ring
	ring := geos.Must(g.ExteriorRing())
	cs, err := ring.coordSeq()
	if err != nil {
		log.Fatal(err)
	}
	lineCoordSeq(ctxt, cs, scale)
	ctxt.FillStroke()
	// interior rings...
}

开发者ID:upstartmobile，项目名称:gogeos，代码行数:14，代码来源:examples.go

示例3: drawLine

func drawLine(ctxt draw2d.GraphicContext, g *geos.Geometry, c color.Color, width float64, scale func(x, y float64) (float64, float64)) {
	if c != nil {
		ctxt.SetStrokeColor(c)
	}
	if width != 0.0 {
		ctxt.SetLineWidth(width)
	}
	// XXX: should get a [] of points
	cs, err := g.coordSeq()
	if err != nil {
		log.Fatal(err)
	}
	lineCoordSeq(ctxt, cs, scale)
	ctxt.Stroke()
}

开发者ID:upstartmobile，项目名称:gogeos，代码行数:15，代码来源:examples.go

示例4: GetBoundingBox

//GetBoundingBox computes the bounding box for a given geometry
func GetBoundingBox(g *geos.Geometry) (geographic.BoundingBox, error) {
	bbox := geographic.BoundingBox{}

	envelope, err := g.Envelope()
	if err != nil {
		return bbox, err
	}

	envelope, err = envelope.Shell()
	if err != nil {
		return bbox, err
	}

	centroid, err := envelope.Centroid()
	if err != nil {
		return bbox, err
	}

	bbox.LatitudeMinDeg, _ = centroid.Y()
	bbox.LongitudeMinDeg, _ = centroid.X()
	bbox.LatitudeMaxDeg = bbox.LatitudeMinDeg
	bbox.LongitudeMaxDeg = bbox.LongitudeMinDeg

	npoints, err := envelope.NPoint()
	if err != nil {
		return bbox, err
	}
	for i := 0; i < npoints; i++ {
		pt := geos.Must(envelope.Point(i))
		lon, _ := pt.X()
		lat, _ := pt.Y()

		if lon < bbox.LongitudeMinDeg {
			bbox.LongitudeMinDeg = lon
		}
		if lon > bbox.LongitudeMaxDeg {
			bbox.LongitudeMaxDeg = lon
		}
		if lat < bbox.LatitudeMinDeg {
			bbox.LatitudeMinDeg = lat
		}
		if lat > bbox.LatitudeMaxDeg {
			bbox.LatitudeMaxDeg = lat
		}
	}

	return bbox, nil
}

开发者ID:xeonx，项目名称:raster，代码行数:49，代码来源:geosconverter.go

示例5: IntersectsFilter

//IntersectsFilter creates a Filter allowing to skip tiles outside of a given geometry
func IntersectsFilter(g *geos.Geometry) raster.Filter {
	//TODO: use a prepared geometry

	return func(level, x, y int) (bool, error) {

		tile, err := newTilePolygon(level, x, y)
		if err != nil {
			return false, err
		}
		intersects, err := g.Intersects(tile)
		if err != nil {
			return false, err
		}

		return !intersects, nil //Tiles that do not intersect are excluded
	}
}

开发者ID:xeonx，项目名称:raster，代码行数:18，代码来源:geosconverter.go

示例6: drawPoint

func drawPoint(ctxt draw2d.GraphicContext, g *geos.Geometry, c color.Color, radius float64, scale func(x, y float64) (float64, float64)) {
	if c != nil {
		ctxt.SetFillColor(c)
	}
	x, err := g.X()
	if err != nil {
		log.Fatal(err)
	}
	y, err := g.Y()
	if err != nil {
		log.Fatal(err)
	}
	x, y = scale(x, y)
	ctxt.MoveTo(x, y)
	ctxt.ArcTo(x, y, radius, radius, 0, 2*math.Pi)
	ctxt.Fill()
}

开发者ID:upstartmobile，项目名称:gogeos，代码行数:17，代码来源:examples.go

示例7: envelope

func envelope(g *geos.Geometry) Envelope {
	env, err := g.Envelope()
	if err != nil {
		log.Fatal(err)
	}
	ring, err := env.ExteriorRing()
	if err != nil {
		log.Fatal(err)
	}
	cs, err := ring.coordSeq()
	if err != nil {
		log.Fatal(err)
	}
	getX := getOrd(cs, (*geos.CoordSeq).GetX)
	getY := getOrd(cs, (*geos.CoordSeq).GetY)
	return Env(getX(0), getY(0), getX(2), getY(2))
}

开发者ID:upstartmobile，项目名称:gogeos，代码行数:17，代码来源:examples.go

示例8: RtreeBboxg

// Returns the bounding box of the geos.Geometry as a rtreego.Rect
func RtreeBboxg(g *geos.Geometry, tol float64) (*rtreego.Rect, error) {
	env, err := g.Envelope()
	if err != nil {
		return nil, err
	}
	shell, _ := env.Shell()
	if err != nil {
		return nil, err
	}
	c, err := shell.Coords()
	if err != nil {
		return nil, err
	}
	return rtreego.NewRect(rtreego.Point{c[0].X, c[0].Y},
		[]float64{math.Max(tol, c[2].X-c[0].X),
			math.Max(tol, c[2].Y-c[0].Y)})
}

开发者ID:fg1，项目名称:mugiss，代码行数:18，代码来源:data_parsers.go

注：本文中的github.com/paulsmith/gogeos/geos.Geometry类示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。