FlowArrow::FlowArrow(FlowCtx* flow_ctx, double x1, double y1, double x2,
double y2, double w, double l, flow_eDrawType d_type)
: ctx(flow_ctx), p_dest(flow_ctx, x2, y2), arrow_width(w), arrow_length(l),
draw_type(d_type), line_width(1)
{
double p1_x, p1_y, p2_x, p2_y;
if (fabs(x2 - x1) < DBL_EPSILON) {
if (y1 > y2) {
p1_x = x2 + w / 2;
p1_y = y2 + l;
p2_x = x2 - w / 2;
p2_y = y2 + l;
} else {
p1_x = x2 + w / 2;
p1_y = y2 - l;
p2_x = x2 - w / 2;
p2_y = y2 - l;
}
} else if (fabs(y2 - y1) < DBL_EPSILON) {
if (x1 > x2) {
p1_x = x2 + l;
p1_y = y2 + w / 2;
p2_x = x2 + l;
p2_y = y2 - w / 2;
} else {
p1_x = x2 - l;
p1_y = y2 - w / 2;
p2_x = x2 - l;
p2_y = y2 + w / 2;
}
} else {
double d = sqrt((y1 - y2) * (y1 - y2) + (x1 - x2) * (x1 - x2));
p1_x = x2 + (x1 - x2) * l / d + (y1 - y2) * w / d / 2;
p1_y = y2 + (y1 - y2) * l / d - (x1 - x2) * w / d / 2;
p2_x = x2 + (x1 - x2) * l / d - (y1 - y2) * w / d / 2;
p2_y = y2 + (y1 - y2) * l / d + (x1 - x2) * w / d / 2;
}
p1 = FlowPoint(flow_ctx, p1_x, p1_y);
p2 = FlowPoint(flow_ctx, p2_x, p2_y);
}
void FlowData::load()
{
if(!mReady)
{
Timer timer(true);
XmlDocument * pointsDoc = new XmlDocument(dataSource);
XmlElement rootNode = pointsDoc->rootNode();
if(rootNode.hasChildren())
{
XmlElement tagNode = rootNode.findChild("tag");
XmlElement drawingNode = tagNode.findChild("drawing");
// Now get all the drawingNode's children.. and only worry about the stroke nodes.
if(drawingNode.hasChildren())
{
std::vector<XmlElement> strokeNodes = drawingNode.children();
// std::vector<XmlElement> strokeNodes = rootNode.xpath("//tag/drawing//stroke");
if(strokeNodes.size() > 0)
{
int totalPoints = 0;
// Now declare some variables to reuse in our loop.
FlowPoint lastPt(Vec2f::zero(), Vec2f::zero(), -1.f);
for(std::vector<XmlElement>::iterator it = strokeNodes.begin(); it < strokeNodes.end(); it++)
{
XmlElement strokeNode = *it;
if(strokeNode.name() == "stroke")
{
// Get all the point nodes.
std::vector<XmlElement> pointNodes = strokeNode.children();
// Create a new stroke
std::vector<FlowPoint> * stroke = new std::vector<FlowPoint>;
for(std::vector<XmlElement>::iterator it2 = pointNodes.begin(); it2 < pointNodes.end(); it2++)
{
XmlElement ptNode = *it2;
if(ptNode.name() == "pt")
{
std::string xVal = ptNode.findChild("x").value();
// float x = fromString( xVal );
float x = boost::lexical_cast<float>( xVal );
std::string yVal = ptNode.findChild("y").value();
// float y = fromString( yVal );
float y = boost::lexical_cast<float>( yVal );
std::string timeVal = ptNode.findChild("time").value();
// float time = fromString( timeVal );
float time = boost::lexical_cast<float>( timeVal );
x = mRemapMinX + (mRemapMaxX - mRemapMinX) * x;
y = mRemapMinY + (mRemapMaxY - mRemapMinY) * y;
Vec2f pos(x, y);
Vec2f vel;
if(lastPt.time > -1)
{
vel.x = pos.x - lastPt.getX();
vel.y = pos.y - lastPt.getY();
}
FlowPoint pt(pos, vel, time);
bool shouldAddPoint = false;
if(ignoreRedundantPositions == true)
{
if(lastPt.time > -1)
{
if(pt.getX() != lastPt.getX() && pt.getY() != lastPt.getY())
{
shouldAddPoint = true;
}
}
else
{
shouldAddPoint = true;
}
}
else
{
shouldAddPoint = true;
}
if(shouldAddPoint)
{
totalPoints++;
stroke->push_back(pt);
lastPt = FlowPoint(pt.pos, pt.vel, pt.time);
}
}
}
// Now see if our stroke is long enough.
if(stroke->size() > minNumberOfPointsInStroke)
{
mStrokes.push_back(stroke);
}
}
}
// We're done.
timer.stop();
std::cout << "FlowData :: GML file parsing complete. Elapsed seconds: " << toString( timer.getSeconds() ) << std::endl;
std::cout << "FlowData :: Total number of points: " << totalPoints << std::endl;
std::cout << "FlowData :: Number of strokes: " << mStrokes.size() << std::endl;
if(mStrokes.size() > 0)
mReady = true;
}
}
}
}
}
