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Length: 7867 (0x1ebb)
Types: TextFile
Names: »support.c«
└─⟦b20c6495f⟧ Bits:30007238 EUUGD18: Wien-båndet, efterår 1987
└─⟦this⟧ »EUUGD18/X/Xtetris/support.c«
#include "defs.h"
block_can_drop(shape_no, xpos, ypos, rot)
int shape_no, xpos, ypos, rot;
{
int y1, c;
c = 3;
while ((c >= 0) && ((shape[shape_no].table[c][rot] & 8) == 0))
c--;
y1 = ypos + c + 1;
if ((c != -1) && (y1 >= 0))
if ((y1 == UHEIGHT) || (grid[xpos][y1] != 0))
return (FALSE);
c = 3;
while ((c >= 0) && ((shape[shape_no].table[c][rot] & 4) == 0))
c--;
y1 = ypos + c + 1;
if ((c != -1) && (y1 >= 0))
if ((y1 == UHEIGHT) || (grid[xpos + 1][y1] != 0))
return (FALSE);
c = 3;
while ((c >= 0) && ((shape[shape_no].table[c][rot] & 2) == 0))
c--;
y1 = ypos + c + 1;
if ((c != -1) && (y1 >= 0))
if ((y1 == UHEIGHT) || (grid[xpos + 2][y1] != 0))
return (FALSE);
c = 3;
while ((c >= 0) && ((shape[shape_no].table[c][rot] & 1) == 0))
c--;
y1 = ypos + c + 1;
if ((c != -1) && (y1 >= 0))
if ((y1 == UHEIGHT) || (grid[xpos + 3][y1] != 0))
return (FALSE);
return TRUE;
}
block_can_left(shape_no, xpos, ypos, rot)
int shape_no, xpos, ypos, rot;
{
int x1, c;
int y0, y1, y2, y3;
int t0, t1, t2, t3;
t0 = shape[shape_no].table[0][rot]; /* Bit map of 1st Row */
t1 = shape[shape_no].table[1][rot]; /* Bit map of 2nd Row */
t2 = shape[shape_no].table[2][rot]; /* Bit map of 3rd Row */
t3 = shape[shape_no].table[3][rot]; /* Bit map of 4th Row */
y0 = ypos;
y1 = ypos + 1;
y2 = ypos + 2;
y3 = ypos + 3;
c = 3;
while ((c >= 0) && ((t0 & (1 << c)) == 0))
c--;
x1 = xpos - 1 + (3 - c);
if (c != -1)
if ((x1 < 0) || ((y0 >= 0) && (grid[x1][y0] != 0)))
return (FALSE);
c = 3;
while ((c >= 0) && ((t1 & (1 << c)) == 0))
c--;
x1 = xpos - 1 + (3 - c);
if (c != -1)
if ((x1 < 0) || ((y1 >= 0) && (grid[x1][y1] != 0)))
return (FALSE);
c = 3;
while ((c >= 0) && ((t2 & (1 << c)) == 0))
c--;
x1 = xpos - 1 + (3 - c);
if (c != -1)
if ((x1 < 0) || ((y2 >= 0) && (grid[x1][y2] != 0)))
return (FALSE);
c = 3;
while ((c >= 0) && ((t3 & (1 << c)) == 0))
c--;
x1 = xpos - 1 + (3 - c);
if (c != -1)
if ((x1 < 0) || ((y3 >= 0) && (grid[x1][y3] != 0)))
return (FALSE);
return TRUE;
}
block_can_right(shape_no, xpos, ypos, rot)
int shape_no, xpos, ypos, rot;
{
int x1, c;
int y0, y1, y2, y3;
int t0, t1, t2, t3;
t0 = shape[shape_no].table[0][rot]; /* Bit map of 1st Row */
t1 = shape[shape_no].table[1][rot]; /* Bit map of 2nd Row */
t2 = shape[shape_no].table[2][rot]; /* Bit map of 3rd Row */
t3 = shape[shape_no].table[3][rot]; /* Bit map of 4th Row */
y0 = ypos;
y1 = ypos + 1;
y2 = ypos + 2;
y3 = ypos + 3;
c = 0;
while ((c < 4) && ((t0 & (1 << c)) == 0))
c++;
x1 = xpos + 1 + (3 - c);
if ((c != 4) && (x1 >= 0))
if ((x1 == UWIDTH) || ((y0 >= 0) && (grid[x1][y0] != 0)))
return (FALSE);
c = 0;
while ((c < 4) && ((t1 & (1 << c)) == 0))
c++;
x1 = xpos + 1 + (3 - c);
if ((c != 4) && (x1 >= 0))
if ((x1 == UWIDTH) || ((y1 >= 0) && (grid[x1][y1] != 0)))
return (FALSE);
c = 0;
while ((c < 4) && ((t2 & (1 << c)) == 0))
c++;
x1 = xpos + 1 + (3 - c);
if ((c != 4) && (x1 >= 0))
if ((x1 == UWIDTH) || ((y2 >= 0) && (grid[x1][y2] != 0)))
return (FALSE);
c = 0;
while ((c < 4) && ((t3 & (1 << c)) == 0))
c++;
x1 = xpos + 1 + (3 - c);
if ((c != 4) && (x1 >= 0))
if ((x1 == UWIDTH) || ((y3 >= 0) && (grid[x1][y3] != 0)))
return (FALSE);
return TRUE;
}
remove_full_lines(y)
int y;
{
int y1, y2, full_flag, x;
int xsize, ysize;
xsize = UNIT * UWIDTH;
for (y1 = y; y1 < y + 4 && y1 < UHEIGHT; y1++) {
full_flag = TRUE;
for (x = 0; x < UWIDTH; x++)
if (grid[x][y1] == 0) {
full_flag = FALSE;
break;
}
if (full_flag) {
ysize = y1 * UNIT;
for (y2 = y1; y2 > 0; y2--)
for (x = 0; x < UWIDTH; x++)
grid[x][y2] = grid[x][y2 - 1];
for (x = 0; x < UWIDTH; x++)
grid[x][0] = 0;
/* for blinking the line to remove */
XSetFunction(XtDisplay(toplevel), gc, GXclear);
XFillRectangle(XtDisplay(toplevel),XtWindow(canvas),gc,
0, ysize, xsize, UNIT);
usleep(250000);
XFlush(XtDisplay(toplevel));
XSetFunction(XtDisplay(toplevel), gc, GXcopy);
XFillRectangle(XtDisplay(toplevel),XtWindow(canvas),gc,
0, ysize, xsize, UNIT);
usleep(250000);
XFlush(XtDisplay(toplevel));
XSetFunction(XtDisplay(toplevel), gc, GXclear);
XFillRectangle(XtDisplay(toplevel),XtWindow(canvas),gc,
0, ysize, xsize, UNIT);
usleep(250000);
XFlush(XtDisplay(toplevel));
XSetFunction(XtDisplay(toplevel), gc, GXcopy);
XCopyArea(XtDisplay(toplevel),
XtWindow(canvas),XtWindow(canvas),gc,
0,0,xsize,ysize,0, UNIT);
XSetFunction(XtDisplay(toplevel), gc, GXclear);
XFillRectangle(XtDisplay(toplevel),XtWindow(canvas),gc,
0, 0, xsize, UNIT);
rows++;
}
}
XFlush(XtDisplay(toplevel));
}
check_rot(shape_no, xpos, ypos, newrot)
int shape_no, xpos, ypos, newrot;
{
int i;
int ti; /* Bit map of i'th row */
int yi; /* Y position on i'th row */
int x0, x1, x2, x3;
x0 = xpos;
x1 = xpos + 1;
x2 = xpos + 2;
x3 = xpos + 3;
yi = ypos;
for (i = 0; i < 4; yi++, i++) {
if ((yi) >= 0) {
ti = shape[shape_no].table[i][newrot];
if ((yi >= UHEIGHT) && (ti != 0))
return FALSE;
if (ti & 8)
if ((x0 < 0) || (x0 >= UWIDTH) || (grid[x0][yi] == 1))
return FALSE;
if (ti & 4)
if ((x1 < 0) || (x1 >= UWIDTH) || (grid[x1][yi] == 1))
return FALSE;
if (ti & 2)
if ((x2 < 0) || (x2 >= UWIDTH) || (grid[x2][yi] == 1))
return FALSE;
if (ti & 1)
if ((x3 < 0) || (x3 >= UWIDTH) || (grid[x3][yi] == 1))
return FALSE;
}
}
return TRUE;
}