void LinePath::calculateParallelLine() {
int midCount = count() / 2;
double ATAN = atan(1.0);
int lineDist = 10;
//get 1/8(M) and 7/8(T) point
QPoint a = getPoint( midCount - 1 );
QPoint b = getPoint( midCount );
int mx = ( a.x() + b.x() ) / 2;
int my = ( a.y() + b.y() ) / 2;
int tx = ( mx + b.x() ) / 2;
int ty = ( my + b.y() ) / 2;
//find dist between M and T points
int distX = ( mx - tx );
distX *= distX;
int distY = ( my - ty );
distY *= distY;
double dist = sqrt( double(distX + distY) );
double angle = atan2( double(ty - my), double(tx - mx) ) + ( ATAN * 2 );
//find point from M to start line from.
double cosx = cos( angle ) * lineDist;
double siny = sin( angle ) * lineDist;
QPoint pointM( mx + (int)cosx, my + (int)siny );
//find dist between P(xb, yb)
distX = ( tx - b.x() );
distX *= distX;
distY = ( ty - b.y() );
distY *= distY;
dist = sqrt( double(distX + distY) );
//find point from T to end line
cosx = cos( angle ) * lineDist;
siny = sin( angle ) * lineDist;
QPoint pointT( tx + (int)cosx, ty + (int)siny );
m_ParallelLines[ 1 ] = pointM;
m_ParallelLines[ 0 ] = pointT;
int arrowDist = 5;
angle = atan2( double(pointT.y() - pointM.y()),
double(pointT.x() - pointM.x()) );
double arrowSlope = angle + ATAN;
cosx = ( cos( arrowSlope ) ) * arrowDist;
siny = ( sin( arrowSlope ) ) * arrowDist;
m_ParallelLines[ 2 ] = QPoint( pointT.x() - (int)cosx, pointT.y() - (int)siny );
arrowSlope = angle - ATAN;
cosx = ( cos( arrowSlope ) ) * arrowDist;
siny = ( sin( arrowSlope ) ) * arrowDist;
m_ParallelLines[ 3 ] = QPoint( pointT.x() - (int)cosx, pointT.y() - (int)siny );
}
void TopView::drawTopViewLines(int rows_interval, int cols_interval, bool fg_tag)
{
topview_BG.setTo(cv::Scalar(0, 0, 0, 0));
// Background color
cv::Point pts[4];
pts[0] = pointT(img_grid[0][0]);
pts[1] = pointT(img_grid[0][img_col]);
pts[2] = pointT(img_grid[img_row][img_col]);
pts[3] = pointT(img_grid[img_row][0]);
cv::fillConvexPoly(topview_BG, pts, 4, color_BG, 8, 0);
// distance tag
int distance, text_dev, font_size, line_thickness;
// 30 m
distance = 3000;
text_dev = 100;
font_size = 1;
line_thickness = 1;
cv::Point pt1 = cv::Point(0, max_distance - distance);
cv::Point pt2 = cv::Point(chord_length, max_distance - distance);
cv::line(topview_BG, pointT(pt1), pointT(pt2), color_tag, line_thickness, 8, 0);
pt1.y += text_dev;
cv::putText(topview_BG, "30 m", pointT(pt1), cv::FONT_HERSHEY_PLAIN, font_size, color_tag, 1);
// 2 m
distance = 200;
pt1.y = max_distance - distance;
pt2.y = max_distance - distance;
cv::line(topview_BG, pointT(pt1), pointT(pt2), color_tag, line_thickness, 8, 0);
pt1.y += text_dev;
cv::putText(topview_BG, "2 m", pointT(pt1), cv::FONT_HERSHEY_PLAIN, font_size, color_tag, 1);
// 1 m
distance = 100;
pt1.y = max_distance - distance;
pt2.y = max_distance - distance;
cv::line(topview_BG, pointT(pt1), pointT(pt2), color_tag, line_thickness, 8, 0);
pt1.y += text_dev;
cv::putText(topview_BG, "1 m", pointT(pt1), cv::FONT_HERSHEY_PLAIN, font_size, color_tag, 1);
if (fg_tag) {
// 20 m
distance = 2000;
pt1.y = max_distance - distance;
pt2.y = max_distance - distance;
cv::line(topview_BG, pointT(pt1), pointT(pt2), color_tag, line_thickness, 8, 0);
pt1.y += text_dev;
cv::putText(topview_BG, "20 m", pointT(pt1), cv::FONT_HERSHEY_PLAIN, font_size, color_tag, 1);
// 10 m
distance = 1000;
pt1.y = max_distance - distance;
pt2.y = max_distance - distance;
cv::line(topview_BG, pointT(pt1), pointT(pt2), color_tag, line_thickness, 8, 0);
pt1.y += text_dev;
cv::putText(topview_BG, "10 m", pointT(pt1), cv::FONT_HERSHEY_PLAIN, font_size, color_tag, 1);
}
// draw lines
line_thickness = 1;
for (int r = 0; r < img_row + 1; r += rows_interval) {
cv::line(topview_BG, pointT(img_grid[r][0]), pointT(img_grid[r][img_col]), color_line, line_thickness, 8, 0);
}
for (int c = 0; c < img_col_half + 1; c += cols_interval) {
#ifdef debug_info_sv_topview
std::cout<<img_col_half + 1 - c<<" ";
#endif
cv::line(topview_BG, pointT(img_grid[0][img_col_half - c]),
pointT(img_grid[img_row][img_col_half - c]), color_line, line_thickness, 8, 0);
cv::line(topview_BG, pointT(img_grid[0][img_col_half + c]),
pointT(img_grid[img_row][img_col_half + c]), color_line, line_thickness, 8, 0);
}
#ifdef debug_info_sv_topview
std::cout<<std::endl;
#endif
}