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#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include "G3d_intern.h"
/*---------------------------------------------------------------------------*/
/*!
* \brief
*
* Converts index <em>tileIndex</em> into tile-coordinates
* <em>(xTile, yTile, zTile)</em>.
*
* \param map
* \param tileIndex
* \param xTile
* \param yTile
* \param zTile
* \return void
*/
void
G3d_tileIndex2tile(G3D_Map * map, int tileIndex, int *xTile, int *yTile,
int *zTile)
{
int tileIndex2d;
*zTile = tileIndex / map->nxy;
tileIndex2d = tileIndex % map->nxy;
*yTile = tileIndex2d / map->nx;
*xTile = tileIndex2d % map->nx;
}
/*---------------------------------------------------------------------------*/
/*!
* \brief
*
* Returns tile-index corresponding to tile-coordinates <em>(xTile,
* yTile, zTile)</em>.
*
* \param map
* \param xTile
* \param yTile
* \param zTile
* \return int
*/
int G3d_tile2tileIndex(G3D_Map * map, int xTile, int yTile, int zTile)
{
return map->nxy * zTile + map->nx * yTile + xTile;
}
/*---------------------------------------------------------------------------*/
/*!
* \brief
*
* Computes the cell-coordinates <em>(x, y, z)</em>
* which correspond to the origin of the tile with tile-coordinates <em>(xTile,
* yTile, zTile)</em>.
*
* \param map
* \param xTile
* \param yTile
* \param zTile
* \param x
* \param y
* \param z
* \return void
*/
void
G3d_tileCoordOrigin(G3D_Map * map, int xTile, int yTile, int zTile, int *x,
int *y, int *z)
{
*x = map->tileX * xTile;
*y = map->tileY * yTile;
*z = map->tileZ * zTile;
}
/*---------------------------------------------------------------------------*/
/*!
* \brief
*
* Computes the cell-coordinates <em>(x, y, z)</em> which correspond to
* the origin of the tile with <em>tileIndex</em>.
*
* \param map
* \param tileIndex
* \param x
* \param y
* \param z
* \return void
*/
void G3d_tileIndexOrigin(G3D_Map * map, int tileIndex, int *x, int *y, int *z)
{
int xTile, yTile, zTile;
G3d_tileIndex2tile(map, tileIndex, &xTile, &yTile, &zTile);
G3d_tileCoordOrigin(map, xTile, yTile, zTile, x, y, z);
}
/*---------------------------------------------------------------------------*/
/*!
* \brief
*
* Converts
* cell-coordinates <em>(x, y, z)</em> into tile-coordinates <em>(xTile, yTile,
* zTile)</em> and the coordinate of the cell <em>(xOffs, yOffs, zOffs)</em> within
* the tile.
*
* \param map
* \param x
* \param y
* \param z
* \param xTile
* \param yTile
* \param zTile
* \param xOffs
* \param yOffs
* \param zOffs
* \return void
*/
void
G3d_coord2tileCoord(G3D_Map * map, int x, int y, int z, int *xTile,
int *yTile, int *zTile, int *xOffs, int *yOffs,
int *zOffs)
{
*xTile = x / map->tileX;
*xOffs = x % map->tileX;
*yTile = y / map->tileY;
*yOffs = y % map->tileY;
*zTile = z / map->tileZ;
*zOffs = z % map->tileZ;
}
/*---------------------------------------------------------------------------*/
/*!
* \brief
*
* Converts cell-coordinates <em>(x, y, z)</em> into
* <em>tileIndex</em> and the <em>offset</em> of the cell within the tile.
*
* \param map
* \param x
* \param y
* \param z
* \param tileIndex
* \param offset
* \return void
*/
void
G3d_coord2tileIndex(G3D_Map * map, int x, int y, int z, int *tileIndex,
int *offset)
{
int xTile, yTile, zTile, xOffs, yOffs, zOffs;
G3d_coord2tileCoord(map, x, y, z,
&xTile, &yTile, &zTile, &xOffs, &yOffs, &zOffs);
*tileIndex = G3d_tile2tileIndex(map, xTile, yTile, zTile);
*offset = zOffs * map->tileXY + yOffs * map->tileX + xOffs;
}
/*---------------------------------------------------------------------------*/
/*!
* \brief
*
* Returns 1 if
* cell-coordinate <em>(x, y, z)</em> is a coordinate inside the region. Returns 0
* otherwise.
*
* \param map
* \param x
* \param y
* \param z
* \return int
*/
int G3d_coordInRange(G3D_Map * map, int x, int y, int z)
{
return (x >= 0) && (x < map->region.cols) && (y >= 0) &&
(y < map->region.rows) && (z >= 0) && (z < map->region.depths);
}
/*---------------------------------------------------------------------------*/
/*!
* \brief
*
* Returns 1 if <em>tileIndex</em> is a valid index for <em>map</em>.
* Returns 0 otherwise.
*
* \param map
* \param tileIndex
* \return int
*/
int G3d_tileIndexInRange(G3D_Map * map, int tileIndex)
{
return (tileIndex < map->nTiles) && (tileIndex >= 0);
}
/*---------------------------------------------------------------------------*/
/*!
* \brief
*
* Returns 1 if
* tile-coordinate <em>(x, y, z)</em> is a coordinate inside tile cube. Returns 0
* otherwise.
*
* \param map
* \param x
* \param y
* \param z
* \return int
*/
int G3d_tileInRange(G3D_Map * map, int x, int y, int z)
{
return (x >= 0) && (x < map->nx) && (y >= 0) && (y < map->ny) &&
(z >= 0) && (z < map->nz);
}
/*---------------------------------------------------------------------------*/
/*!
* \brief
*
* Computes the dimensions of the tile when clipped to fit the
* region of <em>map</em>. The clipped dimensions are returned in <em>rows</em>,
* <em>cols</em>, <em>depths</em>. The complement is returned in <em>xRedundant</em>,
* <em>yRedundant</em>, and <em>zRedundant</em>. This function returns the number of
* cells in the clipped tile.
*
* \param map
* \param tileIndex
* \param rows
* \param cols
* \param depths
* \param xRedundant
* \param yRedundant
* \param zRedundant
* \return int
*/
int
G3d_computeClippedTileDimensions(G3D_Map * map, int tileIndex, int *rows,
int *cols, int *depths, int *xRedundant,
int *yRedundant, int *zRedundant)
{
int x, y, z;
G3d_tileIndex2tile(map, tileIndex, &x, &y, &z);
if ((x != map->clipX) && (y != map->clipY) && (z != map->clipZ)) {
return map->tileSize;
}
if (x != map->clipX) {
*cols = map->tileX;
*xRedundant = 0;
}
else {
*cols = (map->region.cols - 1) % map->tileX + 1;
*xRedundant = map->tileX - *cols;
}
if (y != map->clipY) {
*rows = map->tileY;
*yRedundant = 0;
}
else {
*rows = (map->region.rows - 1) % map->tileY + 1;
*yRedundant = map->tileY - *rows;
}
if (z != map->clipZ) {
*depths = map->tileZ;
*zRedundant = 0;
}
else {
*depths = (map->region.depths - 1) % map->tileZ + 1;
*zRedundant = map->tileZ - *depths;
}
/* printf ("%d (%d %d %d): (%d %d) (%d %d) (%d %d), %d\n", */
/* tileIndex, x, y, z, *rows, *xRedundant, *cols, *yRedundant, */
/* *depths, *zRedundant, *depths * *cols * *rows); */
return *depths * *cols * *rows;
}
/*---------------------------------------------------------------------------*/
/*!
* \brief
*
* Returns 1 if region-coordinates <em>(north, west, bottom)</em> are
* inside the region of <em>map</em>. Returns 0 otherwise.
*
* \param map
* \param north
* \param west
* \param bottom
* \return int
*/
int G3d_isValidLocation(G3D_Map * map, double north, double east, double top)
{
return ((north >= map->region.south) && (north <= map->region.north) &&
(east >= map->region.west) && (east <= map->region.east) &&
(((top >= map->region.bottom) && (top <= map->region.top)) ||
((top <= map->region.bottom) && (top >= map->region.top))));
}
/*---------------------------------------------------------------------------*/
/*!
* \brief
*
* Converts region-coordinates <em>(north, west,
* bottom)</em> into cell-coordinates <em>(x, y, z)</em>.
*
* \param map
* \param north
* \param west
* \param bottom
* \param x
* \param y
* \param z
* \return void
*/
void
G3d_location2coord(G3D_Map * map, double north, double east, double top,
int *x, int *y, int *z)
{
if (!G3d_isValidLocation(map, north, east, top))
G3d_fatalError("location2coord: location not in region");
*y = (north - map->region.south) / (map->region.north -
map->region.south) *
(map->region.rows - 1);
*x = (east - map->region.west) / (map->region.east -
map->region.west) * (map->region.cols -
1);
*z = (top - map->region.bottom) / (map->region.top -
map->region.bottom) *
(map->region.depths - 1);
}
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