line.cpp

#include <math.h>
#include <iostream>


#include "line.h"
#include "scene.h"


Line::Line(Point startIn, Scene *s) : Shape(startIn, s->getDefaultColour()) {
}

void Line::setEnd(Point endIn) {
    end = Point(endIn.x - start.x, endIn.y - start.y);
}

void Line::display(QPainter *qp) {
    qp->setPen(QPen(colour, 2, Qt::SolidLine));
    qp->drawLine(QPoint(start.x, start.y), QPoint(start.x + end.x, start.y + end.y));
}

void Line::displayHighlight(QPainter *qp, QColor colourIn) {
    qp->setPen(QPen(colourIn, 2, Qt::DashLine));
    qp->drawLine(QPoint(start.x, start.y), QPoint(start.x + end.x, start.y + end.y));
}

void Line::update(Point in, Scene *parent) {
    setEnd(in);
}

float Line::innerDistance() {
    return distanceBetweenPoints(start, end);
}

bool Line::pointInShape(Point in) {
    AlgLine selfLine(start, start + end);
    Point meet;
    try {
        meet = linesIntersect(selfLine, orthogonalLine(selfLine, in));
    } catch (AlgError e) {
        return false;
    }

    //std::cout << meet.x << " " << meet.y << "\n";
    //std::cout << in.x << " " << in.y << "\n";
    //std::cout << distanceBetweenPoints(in, meet) << "\n\n\n";

    Point delta = in - start;
    if (delta.x < min(0, end.x) || delta.y < min(0, end.y) || delta.x > max(0, end.x) || delta.y > max(0, end.y)) {
        return false;
    }
    if (distanceBetweenPoints(in, meet) <= 3) {
        return true;
    }
    return false;
}