91 lines
3.4 KiB
C
91 lines
3.4 KiB
C
|
/****************************************************************************
|
||
|
|
* apps/graphics/traveler/tools/libwld/wld_findplane.c
|
||
|
|
* This file contains the logic to find the plane at the specified location
|
||
|
|
* in the world plane list
|
||
|
|
*
|
||
|
|
* Copyright (C) 2016 Gregory Nutt. All rights reserved.
|
||
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
*
|
||
|
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in
|
||
|
|
* the documentation and/or other materials provided with the
|
||
|
|
* distribution.
|
||
|
|
* 3. Neither the name NuttX nor the names of its contributors may be
|
||
|
|
* used to endorse or promote products derived from this software
|
||
|
|
* without specific prior written permission.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||
|
|
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
*
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
/*************************************************************************
|
||
|
|
* Included files
|
||
|
|
*************************************************************************/
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
#include "trv_types.h"
|
||
|
|
#include "wld_plane.h"
|
||
|
|
|
||
|
|
/*************************************************************************
|
||
|
|
* Public Functions
|
||
|
|
*************************************************************************/
|
||
|
|
|
||
|
|
/*************************************************************************
|
||
|
|
* Name: wld_FindPlane
|
||
|
|
* Description:
|
||
|
|
* This function finds the plane at the specified point in the world plane
|
||
|
|
* list
|
||
|
|
************************************************************************/
|
||
|
|
|
||
|
|
rectListType *wld_FindPlane(coord_t h, coord_t v, coord_t plane,
|
||
|
|
rectHeadType *list)
|
||
|
|
{
|
||
|
|
rectListType *rect;
|
||
|
|
|
||
|
|
/* Search until we find the first occurrence of a rectangle in the
|
||
|
|
* specified plane
|
||
|
|
*/
|
||
|
|
|
||
|
|
for (rect = list->head;
|
||
|
|
((rect) && (rect->d.plane < plane));
|
||
|
|
rect = rect->flink);
|
||
|
|
|
||
|
|
/* Then look at every occurrence of rectangles at this plane or
|
||
|
|
* until a rectangle containing the specified point is found
|
||
|
|
*/
|
||
|
|
|
||
|
|
for (;
|
||
|
|
((rect) && (rect->d.plane == plane));
|
||
|
|
rect = rect->flink)
|
||
|
|
{
|
||
|
|
/* There is another rectangle in this plane. Check if the
|
||
|
|
* point lies within the rectangle.
|
||
|
|
*/
|
||
|
|
|
||
|
|
if ((h >= rect->d.hStart) && (h <= rect->d.hEnd)
|
||
|
|
&& (v >= rect->d.vStart) && (v <= rect->d.vEnd))
|
||
|
|
return rect;
|
||
|
|
}
|
||
|
|
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
|