Created
January 8, 2021 17:05
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Bresenham Lines
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| // old unityscript | |
| function drawLine(x0:int, y0:int, x1:int, y1:int) | |
| { | |
| dx= Mathf.Abs(x1-x0); | |
| dy= Mathf.Abs(y1-y0); | |
| if (x0 < x1) {sx=1;}else{sx=-1;} | |
| if (y0 < y1) {sy=1;}else{sy=-1;} | |
| err=dx-dy; | |
| loop=true; | |
| while (loop) | |
| { | |
| texture.SetPixel (x0,y0,Color(1,1,1,1)); | |
| if ((x0 == x1) && (y0 == y1)) loop=false; | |
| e2 = 2*err; | |
| if (e2 > -dy) | |
| { | |
| err = err - dy; | |
| x0 = x0 + sx; | |
| } | |
| if (e2 < dx) | |
| { | |
| err = err + dx; | |
| y0 = y0 + sy; | |
| } | |
| } | |
| texture.Apply(); | |
| } |
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simpler version?
int dx = x1-x0;
int dy = y1-y0;
int step = dx/dy;
int y = x0-(x0%1)*step;
int x = Floor(x0);
int xmax = Floor(x1);
while(x<xmax)
{
pset(x,y,1);
x+=1;
y+=step;
}
https://twitter.com/Enichan/status/1445294504177700864/photo/1