the fair gds editor RoundCellArrayMacro
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wafer with chips

Round Cell Array

Placeing cell references into a round wafer is a common task. This macro will place a named cell reference into a circular wafer as often as possible. Please set baseCell, circleRadius and x/yCenter in line 15 to line 18 to your requirements before starting this macro.

Download: roundCellArray.layout

   1 #!/usr/bin/layout
   2 #name=Macro: roundCellArray.layout
   3 #help=filling a wafer with cell references
   4 
   5 bool insideCircle(point p, int radius){
   6  double x=p.x();
   7  double y=p.y();
   8  double r=radius;
   9  double d=x*x+y*y;
  10  if (d<r*r) return true;
  11  return false;
  12 }
  13 
  14 int main(){
  15 string baseCell="baseCell";
  16 int circleRadius=50000000;  //in databaseunits
  17 int xCenter=0; // center of the circle
  18 int yCenter=0;
  19 //layout->drawing->selectAll(); //uncomment these two line to delete design first
  20 //layout->drawing->deleteSelect();
  21 string cellname=layout->drawing->currentCell->cellName;
  22 cell *c=layout->drawing->findCell(baseCell);
  23 if (c==NULL){
  24         layout->showMessage("Error","base cell not found");
  25        return 0;
  26 }
  27 point min=c->minimum();
  28 point max=c->maximum();
  29 point size=max-min;
  30 point center; center.set(xCenter,yCenter);
  31 int startX=min.x();
  32 int startY=min.y();
  33 while (startY>-circleRadius) startY-=size.y();
  34 while (startX>-circleRadius) startX-=size.x();
  35 int x=startX;
  36 int y=-startY;
  37 do {
  38    y=startY;
  39    do {
  40        point pc; pc.set(x-min.x()+xCenter,y-min.y()+yCenter);
  41        point p1,p2,p3,p4;
  42        p1.set(x,y); //lower left
  43        p2.set(x+size.x(),y); //lower right
  44        p3.set(x,y+size.y()); // upper left
  45        p4.set(x+size.x(),y+size.y()); // upper right
  46        if (insideCircle(p1,circleRadius)&&insideCircle(p2,circleRadius)
  47            &&insideCircle(p3,circleRadius)&&insideCircle(p4,circleRadius)){
  48               element *e=layout->drawing->currentCell->addCellref(c,pc);
  49        }
  50        y+= size.y();
  51   } while (y<circleRadius+size.y());
  52    x+= size.x();
  53 } while (x<circleRadius+size.x());
  54 //layout->drawing->currentCell->addCircle(1,center,circleRadius,360); //uncomment to show circle
  55 layout->drawing->scaleFull();
  56 }

See also


CategoryMacro


RoundCellArrayMacro (last edited 2014-11-05 09:15:03 by JurgenThies)