// build a vertical line: draw it and check for alignment
void SceneGridHandler::buildLineX(qreal deltaX
, qreal pointX, qreal correctionX, qreal &myX1, qreal &myX2)
{
if (deltaX > radius) {
return;
}
if (mShowAlignment) {
drawLineX(pointX);
}
if (makeJumpX(deltaX, pointX - correctionX)) {
myX1 = recalculateX1();
myX2 = recalculateX2(myX1);
}
}
/*!
Compute the X-axis scanlines intersections of a polygon.
\param polygon : Polygon composed by an array of lines.
\param ID : ID of the polygon (has to be know when using queries).
\param scanlines : Resulting intersections.
*/
void
vpMbScanLine::drawPolygonX(const std::vector<std::pair<vpPoint, unsigned int> > &polygon,
const int ID,
std::vector<std::vector<vpMbScanLineSegment> > &scanlines)
{
if (polygon.size() < 2)
return;
if (polygon.size() == 2)
{
vpColVector p1, p2;
createVectorFromPoint(polygon.front().first, p1, K);
createVectorFromPoint(polygon.back().first, p2, K);
drawLineX(p1,
p2,
makeMbScanLineEdge(polygon.front().first, polygon.back().first),
ID,
scanlines);
return;
}
std::vector<std::vector<vpMbScanLineSegment> > local_scanlines;
local_scanlines.resize(w);
for(size_t i = 0 ; i < polygon.size() ; ++i)
{
vpColVector p1, p2;
createVectorFromPoint(polygon[i].first, p1, K);
createVectorFromPoint(polygon[(i + 1) % polygon.size()].first, p2, K);
drawLineX(p1, p2, makeMbScanLineEdge(polygon[i].first, polygon[(i + 1) % polygon.size()].first), ID, local_scanlines);
}
createScanLinesFromLocals(scanlines,local_scanlines,w);
}
