ext.plantuml.com.ctreber.acearth.scandot.DotGeneratorLines Maven / Gradle / Ivy
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package ext.plantuml.com.ctreber.acearth.scandot;
import ext.plantuml.com.ctreber.acearth.projection.Projection;
import ext.plantuml.com.ctreber.acearth.util.Coordinate;
import ext.plantuml.com.ctreber.acearth.util.Point2D;
import ext.plantuml.com.ctreber.acearth.util.Point3D;
/**
* Generate latitude and longitude grid as dots.
*
*
Refactored 08.11.2002
*
*
© 2002 Christian Treber, [email protected]
* @author Christian Treber, [email protected]
*
*/
public class DotGeneratorLines extends ScanDotGenerator
{
private Projection fProjection;
private int fLineDivider;
private int fPointDivider;
private static final double PI = Math.PI;
private static final double TWOPI = 2 * PI;
private static final double HALFPI = PI / 2;
public DotGeneratorLines(Projection pProjection,
int pLineDevider, int pPointDivider)
{
fProjection = pProjection;
fLineDivider = pLineDevider;
fPointDivider = pPointDivider;
}
/**
*
Paint grid.
*/
public void generateScanDots()
{
double lLonStep = TWOPI / (fLineDivider * 4);
double lLatStep = PI / (fLineDivider * 2 * fPointDivider);
for(double lLon = -PI; lLon <= PI; lLon += lLonStep)
{
for(double lLat = -HALFPI; lLat <= HALFPI; lLat += lLatStep)
{
transformAndAddDot(new Coordinate(lLat, lLon));
}
}
lLatStep = TWOPI / (fLineDivider * 4);
lLonStep = PI / (fLineDivider * 2 * fPointDivider);
for(double lLat = -HALFPI; lLat <= HALFPI; lLat += lLatStep)
{
for(double lLon = -PI; lLon <= PI; lLon += lLonStep)
{
transformAndAddDot(new Coordinate(lLat, lLon));
}
}
}
private void transformAndAddDot(Coordinate pPos)
{
final Point3D lPointRotated = fProjection.rotate(pPos.getPoint3DRads());
if(fProjection.isVisible(lPointRotated))
{
Point2D lPoint = fProjection.finalize(fProjection.project2D(lPointRotated));
if(fProjection.isWithinImage(lPoint))
{
fDots.add(new ScanDot(ScanDot.DotTypeGrid, lPoint));
}
}
}
}