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- /**********************************************************************\
-
- File: Diagonal fade down-right.c
-
- Purpose: Graphic effect to fade main screen to solid pattern.
- See comments below for more description.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program in a file named "GNU General Public License".
- If not, write to the Free Software Foundation, 675 Mass Ave,
- Cambridge, MA 02139, USA.
-
- \**********************************************************************/
-
- #include "timing.h"
-
- #define CorrectTime 2
- #define theWindowWidth (boundsRect.right-boundsRect.left)
- #define theWindowHeight (boundsRect.bottom-boundsRect.top)
-
- pascal short DiagonalFadeDownRight(Rect boundsRect, Pattern *thePattern);
-
- /* If you make a long enough region starting at the top-left corner and
- making a strip up and right of <BoxSize> width, all you have to do is move
- the region down until the entire screen is filled. Dave thinks ideas like
- this should be taken out and shot, but it works. */
-
- pascal short DiagonalFadeDownRight(Rect boundsRect, Pattern *thePattern)
- {
- int maxmax;
- RgnHandle archie, boundsRgn, sectrgn;
- int BoxSize;
- Point zeroPoint;
-
- zeroPoint.h=boundsRect.right;
- zeroPoint.v=boundsRect.bottom;
-
- BoxSize=theWindowWidth/40;
-
- maxmax=(theWindowWidth>theWindowHeight) ? theWindowWidth : theWindowHeight;
- maxmax+=BoxSize;
- boundsRgn=NewRgn();
- SetRectRgn(boundsRgn, boundsRect.left, boundsRect.top, boundsRect.right, boundsRect.bottom);
- sectrgn=NewRgn();
- archie=NewRgn();
- OpenRgn();
- MoveTo(boundsRect.left-BoxSize, boundsRect.top);
- Line(0,-BoxSize);
- Line(maxmax,-maxmax);
- Line(BoxSize,0);
- Line(-maxmax,maxmax);
- CloseRgn(archie);
-
- do
- {
- StartTiming();
- OffsetRgn(archie,0,BoxSize);
- SectRgn(archie, boundsRgn, sectrgn);
- FillRgn(sectrgn, *thePattern);
- TimeCorrection(CorrectTime);
- }
- while (!PtInRgn(zeroPoint, archie));
-
- DisposeRgn(archie);
- DisposeRgn(boundsRgn);
- DisposeRgn(sectrgn);
-
- return 0;
- }
-