public ArrayList getPointList(long handId) {
ArrayList curList;
if (_pointLists.containsKey(handId)) curList = (ArrayList) _pointLists.get(handId);
else {
curList = new ArrayList(_maxPoints);
_pointLists.put(handId, curList);
}
return curList;
}
public void draw() {
if (_pointLists.size() <= 0) return;
pushStyle();
noFill();
PVector vec;
PVector firstVec;
PVector screenPos = new PVector();
int colorIndex = 0;
// draw the hand lists
Iterator<Map.Entry> itrList = _pointLists.entrySet().iterator();
while (itrList.hasNext()) {
strokeWeight(2);
stroke(_colorList[colorIndex % (_colorList.length - 1)]);
ArrayList curList = (ArrayList) itrList.next().getValue();
// draw line
firstVec = null;
Iterator<PVector> itr = curList.iterator();
beginShape();
while (itr.hasNext()) {
vec = itr.next();
if (firstVec == null) firstVec = vec;
// calc the screen pos
context.convertRealWorldToProjective(vec, screenPos);
vertex(screenPos.x, screenPos.y);
}
endShape();
// draw current pos of the hand
if (firstVec != null) {
strokeWeight(8);
context.convertRealWorldToProjective(firstVec, screenPos);
point(screenPos.x, screenPos.y);
}
colorIndex++;
}
popStyle();
}
public void OnPointDestroy(long nID) {
println("OnPointDestroy, handId: " + nID);
// remove list
if (_pointLists.containsKey(nID)) _pointLists.remove(nID);
}