void setup() {
    size(400, 400, P3D);  // strange, get drawing error in the cameraFrustum if i use P3D, in opengl there is no problem
  stroke(255);
  noFill();
};

void draw() {
  for (float a=0; a<TWO_PI; a+=PI/18.0) { //HALF_PI; a+=PI/18.0) {//
    drawTexturedSegment(200, 200, a);
  }
};

void drawTexturedSegment(float x, float y, float a) {

  float dx=10.0*cos((a-HALF_PI));//doll.bodyTextures[currtex].width;
  float dy=10.0*sin((a-HALF_PI));

  float x2=x+(200.0*cos(a));
  float y2=y+(200.0*sin(a));


  //noStroke();
  beginShape();
  vertex(x-dx, y-dy, 0.0);
  vertex(x2-dx, y2-dy, 0.0);
  vertex(x2+dx, y2+dy, 0.0);
  vertex(x+dx, y+dy, 0.0);
  endShape();
}