s2.s2coords

Undocumented in source.

Members

Functions

FaceSiTitoXYZ S2Point FaceSiTitoXYZ(int face, uint si, uint ti): Undocumented in source. Be warned that the author may not have intended to support it.
FaceUVtoXYZ S2Point FaceUVtoXYZ(int face, double u, double v): Undocumented in source. Be warned that the author may not have intended to support it.
FaceUVtoXYZ S2Point FaceUVtoXYZ(int face, R2Point uv): Undocumented in source. Be warned that the author may not have intended to support it.
FaceXYZtoUV bool FaceXYZtoUV(int face, S2Point p, double pu, double pv): Undocumented in source. Be warned that the author may not have intended to support it.
FaceXYZtoUV bool FaceXYZtoUV(int face, S2Point p, R2Point puv): Undocumented in source. Be warned that the author may not have intended to support it.
FaceXYZtoUVW S2Point FaceXYZtoUVW(int face, S2Point p): Undocumented in source. Be warned that the author may not have intended to support it.
GetFace int GetFace(S2Point p): Return the face containing the given direction vector. (For points on the boundary between faces, the result is arbitrary but repeatable.)
GetNorm S2Point GetNorm(int face): Undocumented in source. Be warned that the author may not have intended to support it.
GetUAxis S2Point GetUAxis(int face): Undocumented in source. Be warned that the author may not have intended to support it.
GetUNorm S2Point GetUNorm(int face, double u): Undocumented in source. Be warned that the author may not have intended to support it.
GetUVWAxis S2Point GetUVWAxis(int face, int axis): Undocumented in source. Be warned that the author may not have intended to support it.
GetUVWFace int GetUVWFace(int face, int axis, int direction): Undocumented in source.
GetVAxis S2Point GetVAxis(int face): Undocumented in source. Be warned that the author may not have intended to support it.
GetVNorm S2Point GetVNorm(int face, double v): Undocumented in source. Be warned that the author may not have intended to support it.
IJtoSTMin double IJtoSTMin(int i): Undocumented in source.
STtoIJ int STtoIJ(double s): Undocumented in source. Be warned that the author may not have intended to support it.
STtoSiTi uint STtoSiTi(double s): Undocumented in source. Be warned that the author may not have intended to support it.
STtoUV double STtoUV(double s): /////////////// Implementation details follow ////////////////////
STtoUV double STtoUV(double s): Undocumented in source. Be warned that the author may not have intended to support it.
STtoUV double STtoUV(double s): Undocumented in source. Be warned that the author may not have intended to support it.
SiTitoST double SiTitoST(uint si): Undocumented in source.
UVtoST double UVtoST(double u): /////////////// Implementation details follow ////////////////////
UVtoST double UVtoST(double u): Undocumented in source. Be warned that the author may not have intended to support it.
UVtoST double UVtoST(double u): Undocumented in source. Be warned that the author may not have intended to support it.
ValidFaceXYZtoUV void ValidFaceXYZtoUV(int face, S2Point p, double pu, double pv): Undocumented in source.
ValidFaceXYZtoUV void ValidFaceXYZtoUV(int face, S2Point p, R2Point puv): Undocumented in source. Be warned that the author may not have intended to support it.
XYZtoFaceSiTi int XYZtoFaceSiTi(S2Point p, int face, uint si, uint ti): Convert a direction vector (not necessarily unit length) to (face, si, ti) coordinates and, if p is exactly equal to the center of a cell, return the level of this cell (-1 otherwise).
XYZtoFaceUV int XYZtoFaceUV(S2Point p, double pu, double pv): Convert a direction vector (not necessarily unit length) to (face, u, v) coordinates.
XYZtoFaceUV int XYZtoFaceUV(S2Point p, R2Point puv): Undocumented in source. Be warned that the author may not have intended to support it.

Variables

FACE_UVW_AXES double[3][3][6] FACE_UVW_AXES;: The U,V,W axes for each face.
FACE_UVW_FACES int[2][3][6] FACE_UVW_FACES;: The precomputed neighbors of each face (see GetUVWFace).
IJ_TO_POS int[4][4] IJ_TO_POS;: Given a cell orientation and the (i,j)-index of a subcell (0=(0,0), 1=(0,1), 2=(1,0), 3=(1,1)), return the order in which this subcell is visited by the Hilbert curve (a position in the range [0..3]).
INVERT_MASK int INVERT_MASK;: Undocumented in source.
LIMIT_IJ int LIMIT_IJ;: Undocumented in source.
MAX_CELL_LEVEL int MAX_CELL_LEVEL;: Undocumented in source.
MAX_SI_TI uint MAX_SI_TI;: Undocumented in source.
POS_TO_IJ int[4][4] POS_TO_IJ;: Return the (i,j) index of the subcell at the given position 'pos' in the Hilbert curve traversal order with the given orientation. This is the inverse of the previous table:
POS_TO_ORIENTATION int[4] POS_TO_ORIENTATION;: Return a modifier indicating how the orientation of the child subcell with the given traversal position [0..3] is related to the orientation of the parent cell. The modifier should be XOR-ed with the parent orientation to obtain the curve orientation in the child.
SWAP_MASK int SWAP_MASK;: Together these flags define a cell orientation. If 'kSwapMask' is true, then canonical traversal order is flipped around the diagonal (i.e. i and j are swapped with each other). If 'kInvertMask' is true, then the traversal order is rotated by 180 degrees (i.e. the bits of i and j are inverted, or equivalently, the axis directions are reversed).

s2.s2coords

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