public Vec2I prev() {
if (idx <= 0) return null;
idx -= 1;
v.x = data[2 * idx];
v.y = data[2 * idx + 1];
return v;
}
public Vec2I next() {
if (idx >= size) return null;
else {
idx += 1;
if (idx >= size) return null;
v.x = data[2 * idx];
v.y = data[2 * idx + 1];
return v;
}
}
public ArrayV2I(int[] ai) {
data = ai;
size = (ai == null) ? 0 : (ai.length / 2);
idx = 0;
v = new Vec2I();
if (size > 0) {
v.x = data[0];
v.y = data[1];
}
}
public Vec2I at(int i) {
idx = i;
v.x = data[2 * idx];
v.y = data[2 * idx + 1];
return v;
}