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Optionally interpolate markers

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This commit is contained in:
Jan Käberich 2022-01-07 12:37:47 +01:00
parent 367451dc04
commit 2f7449ed21
8 changed files with 210 additions and 42 deletions
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35
Software/PC_Application/Traces/tracexyplot.cpp
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@ -491,7 +491,17 @@ void TraceXYPlot::draw(QPainter &p)
continue;
}
auto t = m->getTrace();
QPointF markerPoint = traceToCoordinate(t, t->index(xPosition), YAxis[i].type);
auto index = t->index(xPosition);
QPointF markerPoint;
if(xPosition < t->sample(index).x && index > 0) {
// marker is not located exactly at this point, interpolate display location
QPointF l0 = traceToCoordinate(t, index - 1, YAxis[i].type);
QPointF l1 = traceToCoordinate(t, index, YAxis[i].type);
auto t0 = (xPosition - t->sample(index - 1).x) / (t->sample(index).x - t->sample(index - 1).x);
markerPoint = l0 + (l1 - l0) * t0;
} else {
markerPoint = traceToCoordinate(t, t->index(xPosition), YAxis[i].type);
}
auto point = plotValueToPixel(markerPoint, i);
if(!plotRect.contains(point)) {
// out of screen
@ -1096,6 +1106,7 @@ double TraceXYPlot::nearestTracePoint(Trace *t, QPoint pixel, double *distance)
}
double closestDistance = numeric_limits<double>::max();
double closestXpos = 0;
unsigned int closestIndex = 0;
auto samples = t->size();
for(unsigned int i=0;i<samples;i++) {
auto point = traceToCoordinate(t, i, YAxis[0].type);
@ -1108,6 +1119,28 @@ double TraceXYPlot::nearestTracePoint(Trace *t, QPoint pixel, double *distance)
if(distance < closestDistance) {
closestDistance = distance;
closestXpos = point.x();
closestIndex = i;
}
}
closestDistance = sqrt(closestDistance);
if(closestIndex > 0) {
auto l1 = plotValueToPixel(traceToCoordinate(t, closestIndex - 1, YAxis[0].type), 0);
auto l2 = plotValueToPixel(traceToCoordinate(t, closestIndex, YAxis[0].type), 0);
double ratio;
auto distance = Util::distanceToLine(pixel, l1, l2, nullptr, &ratio);
if(distance < closestDistance) {
closestDistance = distance;
closestXpos = t->sample(closestIndex-1).x + (t->sample(closestIndex).x - t->sample(closestIndex-1).x) * ratio;
}
}
if(closestIndex < t->size() - 1) {
auto l1 = plotValueToPixel(traceToCoordinate(t, closestIndex, YAxis[0].type), 0);
auto l2 = plotValueToPixel(traceToCoordinate(t, closestIndex + 1, YAxis[0].type), 0);
double ratio;
auto distance = Util::distanceToLine(pixel, l1, l2, nullptr, &ratio);
if(distance < closestDistance) {
closestDistance = distance;
closestXpos = t->sample(closestIndex).x + (t->sample(closestIndex+1).x - t->sample(closestIndex).x) * ratio;
}
}
if(XAxis.type == XAxisType::Distance) {