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- /*******************************************************************************
- * Copywrite © 1992-1993 David S. Blumenthal *
- * *
- * This file is provided as is, and may be freely distributed unaltered. This *
- * message must accompany any copy of this file. This file may be used or *
- * modified for use for a non-commercial product provided that appropriate *
- * credit is given to the author named above. *
- * Commercial use of this source code is prohibited. *
- ******************************************************************************/
-
- #include "msg misc.h"
- #include "msg timing.h"
-
- #define SUB_HOR 20
- #define SUB_VER 20
- #define AREA (SUB_HOR * SUB_VER)
- #define CorrectTime 1
-
- void RandomWipe(GrafPtr);
-
- /* Basically, we divide the window into a bunch of blocks, and copy
- each to the screen in random order. */
- void RandomWipe(GrafPtr myGrafPtr)
- {
- int order[AREA];
- int i;
- long randtemp;
- int ordertemp;
- Rect subBox;
- Rect dest;
- Boolean everyOther;
-
- everyOther=FALSE;
- for(i = 0; i < AREA; i++)
- order[i] = i;
-
- for(i = (AREA - 1); i >= 0; i--) {
- randtemp = ((((long)Random()) +32767) * (i + 1)) / 65535;
-
- ordertemp = order[randtemp];
- order[randtemp] = order[i];
- order[i] = ordertemp;
- }
-
- for(i = 0; i < AREA; i++) {
- StartTiming();
- subBox.top = (((order[i] / SUB_VER) *
- ((myGrafPtr->portRect).bottom - (myGrafPtr->portRect).top))
- / SUB_VER) + (myGrafPtr->portRect).top;
- subBox.left = (((order[i] % SUB_HOR) *
- ((myGrafPtr->portRect).right - (myGrafPtr->portRect).left))
- / SUB_HOR) + (myGrafPtr->portRect).left;
- subBox.bottom = ((((order[i] / SUB_VER) + 1) *
- ((myGrafPtr->portRect).bottom - (myGrafPtr->portRect).top))
- / SUB_VER) + (myGrafPtr->portRect).top;
- subBox.right = ((((order[i] % SUB_HOR) + 1) *
- ((myGrafPtr->portRect).right - (myGrafPtr->portRect).left))
- / SUB_HOR) + (myGrafPtr->portRect).left;
-
- CopyBits(&(myGrafPtr->portBits), &(gMainWindow->portBits),
- &subBox, &subBox, 0, 0L);
- if (everyOther)
- TimeCorrection(CorrectTime);
- everyOther=!everyOther;
- }
- }