Basic geometry classes for Cesium. More...

Classes
struct	ConstantAvailability

struct	SubtreeBufferView

struct	AvailabilitySubtree

struct	AvailabilityNode
	Availability nodes wrap subtree objects and link them together to form a downwardly traversable availability tree. More...

struct	AvailabilityTree

class	AvailabilityAccessor

struct	AxisAlignedBox

class	BoundingSphere
	A bounding sphere with a center and a radius. More...

struct	InterpolatedVertex
	A structure describing a vertex that results from interpolating two other vertices. More...

class	IntersectionTests
	Functions for computing the intersection between geometries such as rays, planes, triangles, and ellipsoids. More...

class	OctreeAvailability

struct	OctreeTileID
	A structure serving as a unique identifier for a node in an octree. More...

class	OctreeTilingScheme
	Defines how an AxisAlignedBox is divided into octree tiles. More...

class	OrientedBoundingBox
	A bounding volume defined as a closed and convex cuboid with any orientation. More...

class	Plane
	A plane in Hessian Normal Format. More...

class	QuadtreeAvailability

class	QuadtreeRectangleAvailability
	Manages information about the availability of tiles in a quadtree. More...

struct	QuadtreeTileID
	Uniquely identifies a node in a quadtree. More...

struct	UpsampledQuadtreeNode
	A node of a tile hierarchy that was created by upsampling the tile content of a parent node. More...

struct	QuadtreeTileRectangularRange
	A rectangular range of tiles at a particular level of a quadtree. More...

class	QuadtreeTilingScheme
	Defines how a rectangular region is divided into quadtree tiles. More...

class	Ray
	A ray that extends infinitely from the provided origin in the provided direction. More...

struct	Rectangle
	A 2D rectangle. More...

struct	Transforms
	Coordinate system matrix constructions helpers. More...

Typedefs
typedef std::variant< ConstantAvailability, SubtreeBufferView >	AvailabilityView

using	TriangleClipVertex = std::variant< int, InterpolatedVertex >
	A vertex resulting from clipping a triangle against a threshold. More...

Enumerations
enum class	Axis { X , Y , Z }
	An enum describing the x, y, and z axes. More...

enum class	CullingResult { Outside = -1 , Intersecting = 0 , Inside = 1 }
	The result of culling an object. More...

enum	TileAvailabilityFlags { TILE_AVAILABLE = 1U , CONTENT_AVAILABLE = 2U , SUBTREE_AVAILABLE = 4U , SUBTREE_LOADED = 8U , REACHABLE = 16U }

Functions
void	clipTriangleAtAxisAlignedThreshold (double threshold, bool keepAbove, int i0, int i1, int i2, double u0, double u1, double u2, std::vector< TriangleClipVertex > &result) noexcept
	Splits a 2D triangle at given axis-aligned threshold value and returns the resulting polygon on a given side of the threshold. More...

Detailed Description

Basic geometry classes for Cesium.

Typedef Documentation

◆ TriangleClipVertex

using CesiumGeometry::TriangleClipVertex = typedef std::variant<int, InterpolatedVertex>

A vertex resulting from clipping a triangle against a threshold.

It may either be a simple index referring to an existing vertex, or an interpolation between two vertices.

Definition at line 51 of file clipTriangleAtAxisAlignedThreshold.h.

Enumeration Type Documentation

◆ Axis

enum CesiumGeometry::Axis

strong

An enum describing the x, y, and z axes.

Enumerator
X	The x-axis.
Y	The y-axis.
Z	The z-axis.

Definition at line 10 of file Axis.h.

◆ CullingResult

enum CesiumGeometry::CullingResult

strong

The result of culling an object.

Enumerator

Outside

Indicates that an object lies completely outside the culling volume.

Intersecting

Indicates that an object intersects with the boundary of the culling volume.

This means that the object is partially inside and partially outside the culling volume.

Inside

Indicates that an object lies completely inside the culling volume.

Definition at line 10 of file CullingResult.h.

◆ TileAvailabilityFlags

enum CesiumGeometry::TileAvailabilityFlags

Enumerator
TILE_AVAILABLE	The tile is known to be available.
CONTENT_AVAILABLE	The tile's content is known to be available.
SUBTREE_AVAILABLE	This tile has a subtree that is known to be available.
SUBTREE_LOADED	This tile has a subtree that is loaded.
REACHABLE	The tile is reachable through the tileset availability tree. If a tile is not reachable, the above flags being false may simply indicate that a subtree needed to reach this tile has not yet been loaded.

Definition at line 9 of file TileAvailabilityFlags.h.

Function Documentation

◆ clipTriangleAtAxisAlignedThreshold()

void CesiumGeometry::clipTriangleAtAxisAlignedThreshold	(	double	threshold,
		bool	keepAbove,
		int	i0,
		int	i1,
		int	i2,
		double	u0,
		double	u1,
		double	u2,
		std::vector< TriangleClipVertex > &	result
	)

noexcept

Splits a 2D triangle at given axis-aligned threshold value and returns the resulting polygon on a given side of the threshold.

The resulting polygon may have 0, 1, 2, 3, or 4 vertices.

Parameters

threshold	The threshold coordinate value at which to clip the triangle.
keepAbove	true to keep the portion of the triangle above the threshold, or false to keep the portion below.
i0	The index of the first vertex in the triangle in counter-clockwise order, used only to construct the TriangleClipVertex result.
i1	The index of the second vertex in the triangle in counter-clockwise order, used only to construct the TriangleClipVertex result.
i2	The index of the third vertex in the triangle in counter-clockwise order, used only to construct the TriangleClipVertex result.
u0	The coordinate of the first vertex in the triangle, in counter-clockwise order.
u1	The coordinate of the second vertex in the triangle, in counter-clockwise order.
u2	The coordinate of the third vertex in the triangle, in counter-clockwise order.
result	On return, contains the polygon that results after the clip, specified as a list of vertices. If this vector already contains elements, the result is pushed onto the end of the vector.

TODO port this CesiumJS example to cesium-native
var result = Cesium.Intersections2D.clipTriangleAtAxisAlignedThreshold(0.5,
false, 0.2, 0.6, 0.4);
// result === [2, 0, -1, 1, 0, 0.25, -1, 1, 2, 0.5]

Classes

Typedefs

Enumerations

Functions