polygon function

bool polygon(Pointer<SdlRenderer> renderer, Pointer<Int16> vx, Pointer<Int16> vy, int n,)

Implementation

bool polygon(Pointer<SdlRenderer> renderer, Pointer<Int16> vx,
    Pointer<Int16> vy, int n) {
  /*
	* Draw
	*/
  bool result = true;
  int i, nn;

  /*
	* Vertex array NULL check
	*/
  if (vx == nullptr) {
    return false;
  }
  if (vy == nullptr) {
    return false;
  }

  /*
	* Sanity check
	*/
  if (n < 3) {
    return false;
  }

  /*
	* Create array of points
	*/
  nn = n + 1;
  var points = calloc<SdlFPoint>(nn);
//	points = (SDL_Point*)malloc(sizeof(SDL_Point) * nn);
  if (points == nullptr) {
    return false;
  }
  for (i = 0; i < n; i++) {
    points[i].x = vx[i].toDouble();
    points[i].y = vy[i].toDouble();
  }
  points[n].x = vx[0].toDouble();
  points[n].y = vy[0].toDouble();

  /*
	* Draw
	*/
  if (result) {
    result = sdlRenderLines(renderer, points, nn);
  }
  calloc.free(points);

  return result;
}