/** Compute circumference by adding up the length of it's segemnts. */
@Override
public final void compute() {
if (!polygon.isDefined()) {
circum.setUndefined();
return;
}
GeoSegmentND[] segment = polygon.getSegments();
double length = 0;
for (int i = 0; i < segment.length; i++) {
length = length + (segment[i].getLength());
}
circum.setValue(length);
}
public AlgoTextLength(Construction cons, String label, GeoText text) {
super(cons);
this.text = text;
length = new GeoNumeric(cons);
setInputOutput();
compute();
length.setLabel(label);
}
public AlgoDistanceLineLine(Construction cons, String label, GeoLine g, GeoLine h) {
super(cons);
this.h = h;
this.g = g;
dist = new GeoNumeric(cons);
setInputOutput(); // for AlgoElement
// compute length
compute();
dist.setLabel(label);
}
/**
* Creates new drawable for slope
*
* @param view
* @param slope
*/
public DrawSlope(EuclidianView view, GeoNumeric slope) {
this.view = view;
kernel = view.getKernel();
this.slope = slope;
geo = slope;
slope.setDrawable(true);
// get parent line
init();
update();
}
public final void draw(Graphics2D g2) {
if (isVisible) {
fill(g2, gp, false); // fill using default/hatching/image as appropriate
if (geo.doHighlighting()) {
g2.setPaint(geo.getSelColor());
g2.setStroke(selStroke);
g2.draw(gp);
}
if (geo.lineThickness > 0) {
g2.setPaint(slope.getObjectColor());
g2.setStroke(objStroke);
g2.draw(gp);
}
if (labelVisible) {
g2.setPaint(slope.getLabelColor());
g2.setFont(view.fontLine);
drawLabel(g2);
g2.drawString(horLabel, xLabelHor, yLabelHor);
}
}
}
@Override
public final void compute() {
if (text.isDefined()) length.setValue(text.getTextString().length());
else length.setUndefined();
}
// calc length of vector v
@Override
public final void compute() {
dist.setValue(g.distance(h));
}
public final void update() {
isVisible = geo.isEuclidianVisible();
if (isVisible) {
if (!geo.getDrawAlgorithm().equals(geo.getParentAlgorithm())) init();
int slopeTriangleSize = slope.getSlopeTriangleSize();
double rwHeight = slope.getValue() * slopeTriangleSize;
double height = view.yscale * rwHeight;
if (Math.abs(height) > Float.MAX_VALUE) {
isVisible = false;
return;
}
// get point on line g
g.getInhomPointOnLine(coords);
if (g.getStartPoint() == null) {
// get point on y-axis and line g
coords[0] = 0.0d;
coords[1] = -g.z / g.y;
}
view.toScreenCoords(coords);
// draw slope triangle
double x = coords[0];
double y = coords[1];
double xright = x + view.xscale * slopeTriangleSize;
if (gp == null) gp = new GeneralPathClipped(view);
gp.reset();
gp.moveTo(x, y);
gp.lineTo(xright, y);
gp.lineTo(xright, y - height);
// gp on screen?
if (!gp.intersects(0, 0, view.width, view.height)) {
isVisible = false;
// don't return here to make sure that getBounds() works for offscreen points too
}
// label position
labelVisible = geo.isLabelVisible();
if (labelVisible) {
if (slopeTriangleSize > 1) {
StringBuilder sb = new StringBuilder();
switch (slope.getLabelMode()) {
case GeoElement.LABEL_NAME_VALUE:
sb.append(slopeTriangleSize);
sb.append(' ');
sb.append(geo.getLabel());
sb.append(" = ");
sb.append(kernel.format(rwHeight));
break;
case GeoElement.LABEL_VALUE:
sb.append(kernel.format(rwHeight));
break;
default: // case GeoElement.LABEL_NAME:
sb.append(slopeTriangleSize);
sb.append(' ');
sb.append(geo.getLabel());
break;
}
labelDesc = sb.toString();
} else {
labelDesc = geo.getLabelDescription();
}
yLabel = (int) (y - height / 2.0f + 6);
xLabel = (int) (xright) + 5;
addLabelOffset();
// position off horizontal label (i.e. slopeTriangleSize)
xLabelHor = (int) ((x + xright) / 2.0);
yLabelHor = (int) (y + view.fontSize + 2);
StringBuilder sb = new StringBuilder();
sb.append(slopeTriangleSize);
horLabel = sb.toString();
}
updateStrokes(slope);
}
}
private void init() {
g = ((AlgoSlope) slope.getDrawAlgorithm()).getg();
}
public AlgoPerimeterPoly(Construction cons, String label, GeoPolygon polygon) {
this(cons, polygon);
circum.setLabel(label);
}