mirror of https://github.com/axmolengine/axmol.git
75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
/* Copyright (c) 2007 Scott Lembcke
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
|
|
typedef struct cpBB{
|
|
cpFloat l, b, r ,t;
|
|
} cpBB;
|
|
|
|
static inline cpBB
|
|
cpBBNew(const cpFloat l, const cpFloat b,
|
|
const cpFloat r, const cpFloat t)
|
|
{
|
|
cpBB bb = {l, b, r, t};
|
|
return bb;
|
|
}
|
|
|
|
static inline cpBool
|
|
cpBBintersects(const cpBB a, const cpBB b)
|
|
{
|
|
return (a.l<=b.r && b.l<=a.r && a.b<=b.t && b.b<=a.t);
|
|
}
|
|
|
|
static inline cpBool
|
|
cpBBcontainsBB(const cpBB bb, const cpBB other)
|
|
{
|
|
return (bb.l < other.l && bb.r > other.r && bb.b < other.b && bb.t > other.t);
|
|
}
|
|
|
|
static inline cpBool
|
|
cpBBcontainsVect(const cpBB bb, const cpVect v)
|
|
{
|
|
return (bb.l < v.x && bb.r > v.x && bb.b < v.y && bb.t > v.y);
|
|
}
|
|
|
|
static inline cpBB
|
|
cpBBmerge(const cpBB a, const cpBB b){
|
|
return cpBBNew(
|
|
cpfmin(a.l, b.l),
|
|
cpfmin(a.b, b.b),
|
|
cpfmax(a.r, b.r),
|
|
cpfmax(a.t, b.t)
|
|
);
|
|
}
|
|
|
|
static inline cpBB
|
|
cpBBexpand(const cpBB bb, const cpVect v){
|
|
return cpBBNew(
|
|
cpfmin(bb.l, v.x),
|
|
cpfmin(bb.b, v.y),
|
|
cpfmax(bb.r, v.x),
|
|
cpfmax(bb.t, v.y)
|
|
);
|
|
}
|
|
|
|
cpVect cpBBClampVect(const cpBB bb, const cpVect v); // clamps the vector to lie within the bbox
|
|
// TODO edge case issue
|
|
cpVect cpBBWrapVect(const cpBB bb, const cpVect v); // wrap a vector to a bbox
|