/* C source for GNU CHESS Revision: 1990-09-30 Modified by Daryl Baker for use in MS WINDOWS environment This file is part of CHESS. CHESS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY. No author or distributor accepts responsibility to anyone for the consequences of using it or for whether it serves any particular purpose or works at all, unless he says so in writing. Refer to the CHESS General Public License for full details. Everyone is granted permission to copy, modify and redistribute CHESS, but only under the conditions described in the CHESS General Public License. A copy of this license is supposed to have been given to you along with CHESS so you can know your rights and responsibilities. It should be in a file named COPYING. Among other things, the copyright notice and this notice must be preserved on all copies. */ #define NOATOM #define NOCLIPBOARD #define NOCREATESTRUCT #define NOFONT #define NOSOUND #define NOWH #define NOCOMM #define NOKANJI #include #include #include "defs.h" static int deltay; static HRGN hitrgn[8]; void InitHitTest ( void ) { POINT ptls[4]; POINT toppt, botpt; int i; for (i=0; i<8; i++) { QuerySqOrigin ( i, 0, ptls+0 ); QuerySqOrigin ( i, 8, ptls+1 ); QuerySqOrigin ( i+1, 8, ptls+2 ); QuerySqOrigin ( i+1, 0, ptls+3 ); hitrgn[i] = CreatePolygonRgn ( ptls, 4, WINDING); } QuerySqOrigin ( 0, 0, &botpt ); QuerySqOrigin ( 0, 8, &toppt ); deltay = botpt.y-toppt.y; } void Hittest_Destructor (VOID) { int i; for (i=0; i<8; i++) DeleteObject ( hitrgn[i] ); } static int HorzHitTest ( int x, int y) { int i; for ( i=0; i<8; i++) { if ( PtInRegion ( hitrgn[i],x,y) ) return i; } return -1; } int HitTest ( int x, int y) { int xsq, ysq; POINT sq00; xsq = HorzHitTest ( x, y ); if (xsq==-1) return -1; QuerySqOrigin ( 0,0, &sq00); if ( y > sq00.y ) return -1; if ( y < (sq00.y-deltay) ) return -1; ysq = 7 - (y - (sq00.y-deltay) ) / (deltay/8); return ( ysq*8 + xsq ); }