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V_DrawLine - cleanups

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twinaphex 2016-02-23 10:40:10 +01:00
parent bff835a663
commit cfb983c14b
1 changed files with 12 additions and 24 deletions
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36
src/v_video.c
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@ -563,35 +563,23 @@ void V_PlotPixel(int scrn, int x, int y, byte color) {
//
void V_DrawLine(fline_t* fl, int color)
{
register int x;
register int y;
register int dx;
register int dy;
register int sx;
register int sy;
register int ax;
register int ay;
register int d;
int dx = fl->b.x - fl->a.x;
int ax = 2 * (dx<0 ? -dx : dx);
int sx = dx<0 ? -1 : 1;
#define PUTDOT(xx,yy,cc) V_PlotPixel(0,xx,yy,(byte)cc)
int dy = fl->b.y - fl->a.y;
int ay = 2 * (dy<0 ? -dy : dy);
int sy = dy<0 ? -1 : 1;
dx = fl->b.x - fl->a.x;
ax = 2 * (dx<0 ? -dx : dx);
sx = dx<0 ? -1 : 1;
dy = fl->b.y - fl->a.y;
ay = 2 * (dy<0 ? -dy : dy);
sy = dy<0 ? -1 : 1;
x = fl->a.x;
y = fl->a.y;
int x = fl->a.x;
int y = fl->a.y;
if (ax > ay)
{
d = ay - ax/2;
int d = ay - ax/2;
while (1)
{
PUTDOT(x,y,color);
V_PlotPixel(0, x,y, (byte)color);
if (x == fl->b.x) return;
if (d>=0)
{
@ -604,10 +592,10 @@ void V_DrawLine(fline_t* fl, int color)
}
else
{
d = ax - ay/2;
int d = ax - ay/2;
while (1)
{
PUTDOT(x, y, color);
V_PlotPixel(0, x, y, (byte)color);
if (y == fl->b.y) return;
if (d >= 0)
{