generateVertexPositions method

Implementation

@override
void generateVertexPositions(Vector3List positions, Uint16List indices) {
  int i = 0;

  // Top
  for (int x = 0; x <= _segments; ++x) {
    final double u = x / _segments;

    positions[i++] = new Vector3(_topRadius * math.cos(u * math.pi * 2.0),
        _height * 0.5, _topRadius * math.sin(u * math.pi * 2.0));
  }

  // Bottom
  for (int x = 0; x <= _segments; ++x) {
    final double u = x / _segments;

    positions[i++] = new Vector3(_bottomRadius * math.cos(u * math.pi * 2.0),
        _height * -0.5, _bottomRadius * math.sin(u * math.pi * 2.0));
  }

  // Top cap
  for (int x = 0; x < _segments; ++x) {
    final double u = x / _segments;

    positions[i++] = new Vector3(_topRadius * math.cos(u * math.pi * 2.0),
        _height * 0.5, _topRadius * math.sin(u * math.pi * 2.0));
  }

  // Bottom cap
  for (int x = 0; x < _segments; ++x) {
    final double u = x / _segments;

    positions[i++] = new Vector3(_bottomRadius * math.cos(u * math.pi * 2.0),
        _height * -0.5, _bottomRadius * math.sin(u * math.pi * 2.0));
  }
}