Vex to open cl

[Linus_r]

Hi,
Im trying to translate from vex to open cl. The code is a bit complex but simplified the problem is that I cant get writing to other points in a loop to work. I tried with write back kernels and just doing it inside the main kernel but the problem is constant. 
A simplified version of the code could be something like this:
@KERNEL
{
@__density= 0;
int entries = @near_points.entries;
for (int i=0;i<entries;i++)
{
int current_pt = @near_points.comp(i);
float amnt =.1;
float currentDens = @__density.getAt(current_pt);
currentDens += amnt;
@__density.setAt(current_pt,currentDens);
@__density -= amnt;

}

}
@WRITEBACK
{
float newDens =@__density.get + @density.get; @density.set(newDens);
@density.set(newDens);
}
Basically taking some value from one point and distribution it to its neighbors. The subtraction works as intended but the addition to the other points doesnt work for some reason.

Very new to Opencl and have watched the masterclass but it doesnt seem to adress this particular problem