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Fix determining bounding box of the edge collection in FillEdgeCollection().

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There is necessary to account also x-ccordinate of the end of the edge when determining bounding box of the edge collection.
This commit is contained in:
Artur Wieczorek 2014-11-25 18:47:19 +01:00
parent 3dd1afe4ec
commit 7512b5fdde
1 changed files with 5 additions and 0 deletions
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modules/core/src/drawing.cpp
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@ -1271,10 +1271,15 @@ FillEdgeCollection( Mat& img, vector<PolyEdge>& edges, const void* color )
{ {
PolyEdge& e1 = edges[i]; PolyEdge& e1 = edges[i];
assert( e1.y0 < e1.y1 ); assert( e1.y0 < e1.y1 );
// Determine x-coordinate of the end of the edge.
// (This is not necessary x-coordinate of any vertex in the array.)
int x1 = e1.x + (e1.y1 - e1.y0) * e1.dx;
y_min = std::min( y_min, e1.y0 ); y_min = std::min( y_min, e1.y0 );
y_max = std::max( y_max, e1.y1 ); y_max = std::max( y_max, e1.y1 );
x_min = std::min( x_min, e1.x ); x_min = std::min( x_min, e1.x );
x_max = std::max( x_max, e1.x ); x_max = std::max( x_max, e1.x );
x_min = std::min( x_min, x1 );
x_max = std::max( x_max, x1 );
} }
if( y_max < 0 || y_min >= size.height || x_max < 0 || x_min >= (size.width<<XY_SHIFT) ) if( y_max < 0 || y_min >= size.height || x_max < 0 || x_min >= (size.width<<XY_SHIFT) )