how do you make triangle base pivot

Using UTFT and UTFT_geometry library

I'm using a variation of HazardMinds post from another thread. But he was using drawLine.

The pointer side works fine. My problem is I can't get the base of the triangle to pivot

}

double mD(double data, double in_min, double in_max, double out_min, double out_max)//Map double
{
  return (data - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}

void drawNeedle(int sensor,int pos_x, int pos_y){
  double cur = mD(analogRead(A0),0,1023,0,(1.5 * pi));
  x = pos_x + cos(cur + (pi/2)) * rad;
  y = pos_y + sin(cur + (pi/2)) * rad;

      trx = pos_x - 5;
      tr = pos_y;
      tlx =  pos_x + 5;
      tl = pos_y;
      topx = x;
      top = y;



  if(topx != otopx && top != otop)  
   {
    myGLCD.setColor(BLACK);
      geo.fillTriangle(otrx, otr, otlx, otl, otopx, otop);
    myGLCD.setColor(RED);
      geo.fillTriangle(trx, tr, tlx, tl, topx, top);
      
      otrx = trx;
      otr = tr;
      otlx = tlx;
      otl = tl;
      otopx = topx;
      otop = top;

void loop(){
  
  
  
  drawNeedle(A0,120,170);

  }


void loop(){
  
  
  
  drawNeedle(A0,120,170)
}

This does the same thing.

void drawNeedle(int sensor,int pos_x, int pos_y, int pos_x2, int pos_y2){
  double cur = mD(analogRead(A0),0,1023,0,(1.5 * pi));
  x = ((pos_x + pos_x2)/2) + cos(cur + (pi/2)) * rad;
  y = ((pos_y + pos_y2)/2) + sin(cur + (pi/2)) * rad;

      trx = pos_x + cos(cur + (pi/2)) * 10;
      tr = pos_y + sin(cur + (pi/2)) * 10;
      tlx = pos_x2 + cos(cur + (pi/2)) * 10;
      tl = pos_y2 + sin(cur + (pi/2)) * 10;
      topx = x;
      top = y;

drawNeedle(A0,120,170,125,170);