matthew/The-Powder-Toy
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No rounding errors with triangle brush, so no need for epsilon (I hope).

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Savely Skresanov 2012-05-28 21:18:29 +07:00
parent b6d813a54d
commit 274a7fe582
1 changed files with 1 additions and 2 deletions
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3
src/powder.c
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@ -3375,8 +3375,7 @@ int InCurrentBrush(int i, int j, int rx, int ry)
return (abs(i) <= rx && abs(j) <= ry);
break;
case TRI_BRUSH:
// -1e-9 because due to rounding errors, the corner at i=rx is not considered to be inside the brush at some brush sizes
return (j <= ry ) && ( j >= (((-2.0*ry)/rx)*i)-ry-1e-9) && ( j >= (((-2.0*ry)/(-rx))*i)-ry-1e-9) ;
return ((abs((rx+2*i)*ry+rx*j) + abs(2*rx*(j-ry)) + abs((rx-2*i)*ry+rx*j))<=(4*rx*ry));
break;
default:
return 0;