static void vLine(int fd, int x0, int y0, int y1)
{
int bak;
// printf("vLine: %d %d %d\n", x0, y0, y1);
if (((PGDC) fd)->ps != PS_SOLID)
{
error("Only PS_SOLID is supported in %s", __FUNCTION__);
}
// x and y have been already fit to dc
if(y0 > y1)
{
bak = y1;
y1 = y0;
y0 = bak;
}
while(y1 >= y0)
{
lcd_point(fd, x0, y0);
y0++;
}
return;
}
static void hLine(int fd, int x0, int y0, int x1)
{
int bak;
PGDC pgdc = (PGDC) fd;
int sep = 0;
// printf("hLine: %d %d %d\n", x0, y0, x1);
// x and y have been already fit to dc
if (x0 > x1)
{
bak = x1;
x1 = x0;
x0 = bak;
}
lcd_point(fd, x0, y0);
x0++;
if (x0 >= x1) return;
while (x0 != x1)
{
if (pgdc->ps == PS_DOT)
{
if ((sep & 0x3) == 0x3)
lcd_point(fd, x0, y0);
sep ++;
}
else
if (pgdc->ps == PS_SOLID)
{
lcd_point(fd, x0, y0);
}
x0 ++;
}
return;
}
void drawBackground(Position *stars){
int row,col,xPos = 0;
lcd_fillScreen(BLACK);
// Fill stars
for (row = stars->y; row < DISPLAY_HEIGHT; row += STAR_SPACING_HEIGHT) {
for (col = stars->x; col < DISPLAY_WIDTH; col++) {
if (xPos%STAR_SPACING_WIDTH == /*(row%2)*/ 0) {
lcd_point(col,row,WHITE);
}
xPos++;
}
}
// Increment for the next time
if (stars->y == STAR_SPACING_HEIGHT*2) {
stars->y = 0;
} else {
stars->y++;
}
}
void grph_line_bound(int fd, int x0, int y0, int x1, int y1, int yl, int yu)
{
short dx = 0, dy = 0;
signed char dx_sym = 0, dy_sym = 0;
short dx_x2 = 0, dy_x2 = 0;
short di = 0;
// PGDC pgdc = (PGDC) fd;
//printf("line: %d %d %d\n", pgdc->x, pgdc->cx, pgdc->xres);
dx = x1-x0;
dy = y1-y0;
if(dx == 0) /* vertical line */
{
if (y0 < yl && y1 < yl) return;
if (y0 > yu && y1 > yu) return;
if (y0 < yl) y0 = yl;
if (y0 > yu) y0 = yu;
if (y1 < yl) y1 = yl;
if (y1 > yu) y1 = yu;
vLine(fd, x0, y0, y1);
return;
}
if(dx > 0)
{
dx_sym = 1;
}
else
{
dx_sym = -1;
}
if(dy == 0) /* horizontal line */
{
if (y0 < yl) return;
if (y0 > yu) return;
hLine(fd, x0, y0, x1);
return;
}
if (((PGDC) fd)->ps != PS_SOLID)
{
error("Only PS_SOLID is supported in %s", __FUNCTION__);
}
if(dy > 0)
{
dy_sym = 1;
}
else
{
dy_sym = -1;
}
dx = dx_sym*dx;
dy = dy_sym*dy;
dx_x2 = dx*2;
dy_x2 = dy*2;
if(dx >= dy)
{
di = dy_x2 - dx;
while(x0 != x1)
{
if (y0 >= yl && y0 <= yu)
{
lcd_point(fd, x0, y0);
}
x0 += dx_sym;
if(di<0)
{
di += dy_x2;
}
else
{
di += dy_x2 - dx_x2;
y0 += dy_sym;
}
}
if (y0 >= yl && y0 <= yu)
{
lcd_point(fd, x0, y0);
}
}
else
{
di = dx_x2 - dy;
while(y0 != y1)
{
if (y0 >= yl && y0 <= yu)
{
lcd_point(fd, x0, y0);
}
y0 += dy_sym;
if(di < 0)
{
di += dx_x2;
}
else
{
di += dx_x2 - dy_x2;
x0 += dx_sym;
}
}
if (y0 >= yl && y0 <= yu)
{
lcd_point(fd, x0, y0);
}
}
return;
}
void grph_line(int fd, int x0, int y0, int x1, int y1)
{
short dx = 0, dy = 0;
signed char dx_sym = 0, dy_sym = 0;
short dx_x2 = 0, dy_x2 = 0;
short di = 0;
// PGDC pgdc = (PGDC) fd;
//printf("line: %d %d %d\n", pgdc->x, pgdc->cx, pgdc->xres);
/* x0 += pgdc->x;
y0 += pgdc->y;
x1 += pgdc->x;
y1 += pgdc->y;
*/
dx = x1-x0;
dy = y1-y0;
/* x += pgdc->x;
y += pgdc->y;
if (cx<0) cx = 0;
if (cy<0) cy = 0;
if (x > pgdc->x+pgdc->cx) return;
else if (x+cx > pgdc->x+pgdc->cx) cx = pgdc->x+pgdc->cx -1 - x;
if (y > pgdc->y+pgdc->cy) return;
else if (y+cy > pgdc->y+pgdc->cy) cy = pgdc->y+pgdc->cy -1 - y;
*/
if(dx == 0) /* vertical line */
{
/* if (x0 < pgdc->x || x0 > pgdc->x + pgdc->cx) return;
y0 = (y0 < pgdc->y) ? pgdc->y : y0;
y0 = (y0 >= pgdc->y+pgdc->cy) ? pgdc->y+pgdc->cy-1 : y0;
y1 = (y1 < pgdc->y) ? pgdc->y : y1;
y1 = (y1 >= pgdc->y+pgdc->cy) ? pgdc->y+pgdc->cy-1 : y1;*/
vLine(fd, x0, y0, y1);
return;
}
if(dx > 0)
{
dx_sym = 1;
}
else
{
dx_sym = -1;
}
if(dy == 0) /* horizontal line */
{
/* if (y0 < pgdc->y || y0 > pgdc->y + pgdc->cy) return;
printf("grph_line %d %d %d %d\n", x0, x1, pgdc->x, pgdc->cx);
x0 = (x0 < pgdc->x) ? pgdc->x : x0;
x0 = (x0 >= pgdc->x+pgdc->cx) ? pgdc->x+pgdc->cx-1 : x0;
x1 = (x1 < pgdc->x) ? pgdc->x : x1;
x1 = (x1 >= pgdc->x+pgdc->cx) ? pgdc->x+pgdc->cx-1 : x1;*/
hLine(fd, x0, y0, x1);
return;
}
if (((PGDC) fd)->ps != PS_SOLID)
{
error("Only PS_SOLID is supported in %s", __FUNCTION__);
}
if(dy > 0)
{
dy_sym = 1;
}
else
{
dy_sym = -1;
}
dx = dx_sym*dx;
dy = dy_sym*dy;
dx_x2 = dx*2;
dy_x2 = dy*2;
if(dx >= dy)
{
di = dy_x2 - dx;
while(x0 != x1)
{
lcd_point(fd, x0, y0);
x0 += dx_sym;
if(di<0)
{
di += dy_x2;
}
else
{
di += dy_x2 - dx_x2;
y0 += dy_sym;
}
// if (x0<0 || x0>=pgdc->cx) break;
// if (y0<0 || y0>=pgdc->cy) break;
}
lcd_point(fd, x0, y0);
}
else
{
di = dx_x2 - dy;
while(y0 != y1)
{
lcd_point(fd, x0, y0);
y0 += dy_sym;
if(di < 0)
{
di += dx_x2;
}
else
{
di += dx_x2 - dy_x2;
x0 += dx_sym;
}
// if (x0<0 || x0>=pgdc->cx) break;
// if (y0<0 || y0>=pgdc->cy) break;
}
lcd_point(fd, x0, y0);
}
return;
}
int drawBall(BALL* ball)
{
int position;
do
{
int x = ball->old_x;
int y = ball->old_y;
if (x > ball->x) position = LEFT;
else if (x < ball->x) position = RIGHT;
else if (y > ball->y) position = DOWN;
else if (y < ball->y) position = UP;
else position = 0;
switch (position)
{
case 0:
{
lcd_point(x-1, y+2, 1);
lcd_point(x-0, y+2, 1);
lcd_point(x+1, y+2, 1);
lcd_point(x-2, y+1, 1);
lcd_point(x-1, y+1, 1);
lcd_point(x+0, y+1, 1);
lcd_point(x+1, y+1, 1);
lcd_point(x+2, y+1, 1);
lcd_point(x-2, y+0, 1);
lcd_point(x-1, y+0, 1);
lcd_point(x+0, y+0, 1);
lcd_point(x+1, y+0, 1);
lcd_point(x+2, y+0, 1);
lcd_point(x-2, y-1, 1);
lcd_point(x-1, y-1, 1);
lcd_point(x+0, y-1, 1);
lcd_point(x+1, y-1, 1);
lcd_point(x+2, y-1, 1);
lcd_point(x-1, y-2, 1);
lcd_point(x-0, y-2, 1);
lcd_point(x+1, y-2, 1);
break;
}
case UP: // up
{
lcd_point(x-1, y+3, 1);
lcd_point(x-0, y+3, 1);
lcd_point(x+1, y+3, 1);
lcd_point(x-2, y+2, 1);
lcd_point(x+2, y+2, 1);
lcd_point(x-2, y-1, 0);
lcd_point(x+2, y-1, 0);
lcd_point(x-1, y-2, 0);
lcd_point(x-0, y-2, 0);
lcd_point(x+1, y-2, 0);
ball->old_y++;
break;
}
case DOWN: // down
{
lcd_point(x-1, y-3, 1);
lcd_point(x-0, y-3, 1);
lcd_point(x+1, y-3, 1);
lcd_point(x-2, y-2, 1);
lcd_point(x+2, y-2, 1);
lcd_point(x-2, y+1, 0);
lcd_point(x+2, y+1, 0);
lcd_point(x-1, y+2, 0);
lcd_point(x-0, y+2, 0);
lcd_point(x+1, y+2, 0);
ball->old_y--;
break;
}
case RIGHT: // right
{
lcd_point(x+3, y-1, 1);
lcd_point(x+3, y+0, 1);
lcd_point(x+3, y+1, 1);
lcd_point(x+2, y-2, 1);
lcd_point(x+2, y+2, 1);
lcd_point(x-1, y-2, 0);
lcd_point(x-1, y+2, 0);
lcd_point(x-2, y-1, 0);
lcd_point(x-2, y+0, 0);
lcd_point(x-2, y+1, 0);
ball->old_x++;
break;
}
case LEFT: // left
{
lcd_point(x-3, y-1, 1);
lcd_point(x-3, y+0, 1);
lcd_point(x-3, y+1, 1);
lcd_point(x-2, y-2, 1);
lcd_point(x-2, y+2, 1);
lcd_point(x+1, y-2, 0);
lcd_point(x+1, y+2, 0);
lcd_point(x+2, y-1, 0);
lcd_point(x+2, y+0, 0);
lcd_point(x+2, y+1, 0);
ball->old_x--;
break;
}
}
} while ((ball->x != ball->old_x) || (ball->y != ball->old_y));
return ball->y;
} // end drawBall