/* Going to use Heron's Formula to for calculating the distance
* first we calculate the distance of each of the sides,
* and use that info to calcualate the height of the triangle, giving us back the
* distance
*/
private double calculateDistance(Line l, DoublePoint p) {
double side1 = l.getStart().distance(l.getEnd());
double side2 = l.getStart().distance(p);
double side3 = l.getEnd().distance(p);
double hS = (side1 + side2 + side3) / 2;
double triangleArea = Math.sqrt(hS * (hS - side1) * (hS - side2) * (hS - side3));
double distance = (2 * triangleArea) / side1;
return distance;
}
private void moveLine(Line l, DoublePoint latestPoint) {
DoublePoint origEndPoint = l.getEnd();
DoublePoint origStartPoint = l.getStart();
// repaintRegion(origStartPoint, origEndPoint);
repaint();
int dx = (int) (latestPoint.getX() - origPoint.getX());
int dy = (int) (latestPoint.getY() - origPoint.getY());
origPoint = latestPoint;
l.moveBy(dx, dy);
DoublePoint newStartPoint = l.getStart();
DoublePoint newEndPoint = l.getEnd();
repaintRegion(newStartPoint, newEndPoint);
repaint();
}
public boolean equals(Object o) {
// order does not matter, as with a vector
if (o instanceof Line) {
Line l = (Line) o;
if (this.getStart().equals(l.getStart()) && this.getEnd().equals(l.getEnd())) {
return true;
} else if (this.getEnd().equals(l.getStart()) && this.getStart().equals(l.getEnd())) {
return true;
} else {
return false;
}
} else {
return false;
}
}
@Test
public void create() {
final Point start = Point.valueOf(5, 6);
final Point end = Point.valueOf(50, 60);
final Line sut = Line.valueOf(start, end);
assertEquals(start, sut.getStart());
assertEquals(end, sut.getEnd());
}
public static double interpolateY(Line line, double xValue) {
// if point1.x() == point2.x(), is a vertical line, will produce an infinity value
XY point1 = line.getStart();
XY point2 = line.getEnd();
double x1 = point1.x();
double x2 = point2.x();
double y1 = point1.y();
double y2 = point2.y();
return (y2 - y1) / (x2 - x1) * (xValue - x1) + y1;
}
@Override
public void onDraw(Canvas canvas) {
super.onDraw(canvas);
// If the game is paused we mask the game view
if (hide) {
setBackgroundColor(getResources().getColor(R.color.black));
}
// Otherwise if the game is pending
else {
setBackgroundResource(R.drawable.grid_background);
// Fill the shapes
if (mg != null && !mg.getShapes().isEmpty()) {
for (Map.Entry<Rect, Integer> e : mg.getShapes().entrySet()) {
fill.setColor(e.getValue());
canvas.drawRect(e.getKey(), fill);
}
}
// If you lose (there is at least one adjacent shape with the same color)
if (adjacent != null && !adjacent.isEmpty()) {
for (Rect rect : adjacent) {
canvas.drawRect(rect, striped);
}
}
// Stroke
if (mg != null && !mg.getLines().isEmpty()) {
for (Line line : mg.getLines()) {
canvas.drawLine(
line.getStart().x, line.getStart().y, line.getEnd().x, line.getEnd().y, stroke);
}
}
}
}
private void addArcs(int divs) {
double theta = calculateTheta(divs);
for (int i = 0; i < circles.size() - 1; i++) {
Line nextLine = circles.get((i + 1) % circles.size());
DoublePoint start = circles.get(i).getEnd();
Arc temp =
new Arc(
new DoublePoint(0, 0),
new DoublePoint(getWidth(), getHeight()),
-90 + (int) (i * theta),
(int) theta + 5);
Debug.println(
start + ", " + nextLine.getEnd() + "start: " + (i * theta) + ", with sweep: " + theta);
arcs.add(temp);
}
}
private void repaintLine(Line l) {
repaintRegion(l.getStart(), l.getEnd());
}
private void changeLine(Line l, DoublePoint latestPoint) {
DoublePoint origEndPoint = l.getEnd();
repaintRegion(l.getStart(), origEndPoint);
l.setEndPoint(latestPoint);
repaintRegion(origEndPoint, l.getEnd());
}