/* CALCULATE VALUES QUADRANTS: Calculate x-y values where direction is not
parallel to eith x or y axis. */
public static void calcValuesQuad(int x1, int y1, int x2, int y2) {
double arrowAng = Math.toDegrees(Math.atan((double) haw / (double) al));
double dist = Math.sqrt(al * al + aw);
double lineAng =
Math.toDegrees(Math.atan(((double) Math.abs(x1 - x2)) / ((double) Math.abs(y1 - y2))));
// Adjust line angle for quadrant
if (x1 > x2) {
// South East
if (y1 > y2) lineAng = 180.0 - lineAng;
} else {
// South West
if (y1 > y2) lineAng = 180.0 + lineAng;
// North West
else lineAng = 360.0 - lineAng;
}
// Calculate coords
xValues[0] = x2;
yValues[0] = y2;
calcCoords(1, x2, y2, dist, lineAng - arrowAng);
calcCoords(2, x2, y2, dist, lineAng + arrowAng);
}
public static void drawLine(Graphics g, int x1, int y1, int x2, int y2, int lineWidth) {
if (lineWidth == 1) g.drawLine(x1, y1, x2, y2);
else {
double angle;
double halfWidth = ((double) lineWidth) / 2.0;
double deltaX = (double) (x2 - x1);
double deltaY = (double) (y2 - y1);
if (x1 == x2) angle = Math.PI;
else angle = Math.atan(deltaY / deltaX) + Math.PI / 2;
int xOffset = (int) (halfWidth * Math.cos(angle));
int yOffset = (int) (halfWidth * Math.sin(angle));
int[] xCorners = {x1 - xOffset, x2 - xOffset + 1, x2 + xOffset + 1, x1 + xOffset};
int[] yCorners = {y1 - yOffset, y2 - yOffset, y2 + yOffset + 1, y1 + yOffset + 1};
g.fillPolygon(xCorners, yCorners, 4);
}
}