Tin

package

v1.7.2 Latest Latest Go to latest Published: Jan 3, 2026 License: GPL-3.0 Imports: 3 Imported by: 0

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Valid go.mod file
Redistributable license
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Stable version
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Repository

github.com/GrainArc/SouceMap

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Documentation ¶

Index ¶

func GetPolygonInfo(polygon *Polygon2D) map[string]interface{}
type Edge3D
type GeoJSONGeometry
type Point2D
type Point3D
- func CoordsToPoint3D(coords [][]float64) ([]*Point3D, error)
type Polygon2D
type TIN3D
- func CreateTIN3D(polygon *Polygon2D, points3D []*Point3D) *TIN3D
type Triangle3D
- func (t *Triangle3D) Area() float64
- func (t *Triangle3D) Normal() (float64, float64, float64)

Constants ¶

This section is empty.

Variables ¶

This section is empty.

Functions ¶

func GetPolygonInfo ¶

func GetPolygonInfo(polygon *Polygon2D) map[string]interface{}

GetPolygonInfo 获取多边形的基本信息

Types ¶

type Edge3D ¶

type Edge3D struct {
	P1, P2 *Point3D
}

Edge3D 表示一条三维边

type GeoJSONGeometry ¶

type GeoJSONGeometry struct {
	Type        string          `json:"type"`
	Coordinates json.RawMessage `json:"coordinates"`
}

GeoJSONGeometry 表示GeoJSON几何对象的结构

type Point2D ¶

type Point2D struct {
	X, Y float64
	ID   int
}

Point2D 表示一个二维点

type Point3D ¶

type Point3D struct {
	X, Y, Z float64
	ID      int
}

Point3D 表示一个三维点

func CoordsToPoint3D ¶

func CoordsToPoint3D(coords [][]float64) ([]*Point3D, error)

type Polygon2D ¶

type Polygon2D struct {
	Points []*Point2D
}

Polygon2D 表示一个二维多边形面

func GeometryStringToMultiPolygon2D ¶

func GeometryStringToMultiPolygon2D(geometryStr string) ([]*Polygon2D, error)

GeometryStringToMultiPolygon2D 将GeoJSON Geometry字符串转换为多个独立的Polygon2D对象每个多边形只包含外环，适用于MultiPolygon数据

func GeometryStringToPolygon2D ¶

func GeometryStringToPolygon2D(geometryStr string) (*Polygon2D, error)

GeometryStringToPolygon2D 将GeoJSON Geometry字符串转换为Polygon2D对象支持的几何类型：Polygon, MultiPolygon 对于MultiPolygon，返回第一个多边形；对于有洞的多边形，只返回外环

func GeometryStringToPolygon2DWithAllRings ¶

func GeometryStringToPolygon2DWithAllRings(geometryStr string) ([]*Polygon2D, error)

GeometryStringToPolygon2DWithAllRings 将GeoJSON Geometry字符串转换为多个Polygon2D对象返回所有的环（外环和内环），适用于需要处理带洞多边形的情况

type TIN3D ¶

type TIN3D struct {
	Points    []*Point3D
	Triangles []*Triangle3D
	Edges     []*Edge3D
}

TIN3D 三维三角不规则网络

func CreateTIN3D ¶

func CreateTIN3D(polygon *Polygon2D, points3D []*Point3D) *TIN3D

创建三维TIN

func (*TIN3D) GetElevationAt ¶

func (tin *TIN3D) GetElevationAt(x, y float64) (float64, error)

获取二维点在TIN上的投影高程

func (*TIN3D) GetElevationGrid ¶

func (tin *TIN3D) GetElevationGrid(minX, minY, maxX, maxY float64, stepX, stepY float64) ([][]float64, error)

获取指定区域内的高程网格

func (*TIN3D) GetElevationsAt ¶

func (tin *TIN3D) GetElevationsAt(points []Point2D) ([]float64, error)

批量获取多个点的高程

func (*TIN3D) GetSlopeAndAspect ¶

func (tin *TIN3D) GetSlopeAndAspect(x, y float64, delta float64) (slope, aspect float64, err error)

计算指定点的坡度和坡向

func (*TIN3D) Print ¶

func (tin *TIN3D) Print()

打印TIN信息

type Triangle3D ¶

type Triangle3D struct {
	P1, P2, P3 *Point3D
	ID         int
}

Triangle3D 表示一个三维三角形

func (*Triangle3D) Area ¶

func (t *Triangle3D) Area() float64

计算三角形面积（三维）

func (*Triangle3D) Normal ¶

func (t *Triangle3D) Normal() (float64, float64, float64)

计算三角形法向量

Source Files ¶

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