The first Jody's answer give me an idea to how I should
write my code. His explanation about scale and scale
denominator was enough. I did not need to use the class
ScaleUtils. Here goes a piece of my code:
private class MouseHandler extends AbstractZoomTool {
// other code here...
.
.
.
int jump = 0;
double currentScale =
getMapPane().getWorldToScreenTransform().getScaleX();
double scaleWithZoom = currentScale * this.getZoom();
double resultScale = (scaleWithZoom - currentScale);
if (resultScale >= 1 && resultScale < 5)
jump = 12;
if (resultScale >= 5 && resultScale < 10)
jump = 9;
if (resultScale >= 10 && resultScale < 15)
jump = 6;
if (resultScale >= 15)
jump = 3;
createPointWithArrows(jump);
.
.
.
// More code here...
}
Into the method "createPointWithArrows(int jump)" I have a loop:
for (j = 1; j <= 733; j+=jump) {
for (i = 1; i <= 601; i+=jump) {
and it place arrows based on the scale of the map.
Gustavo Mesquita.
-----
Gustavo Mesquita da Silva.
Brazilian Navy Hydrographic Center
Niterói, Rio de Janeiro - Brazil
--
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