Messages

1

Graphics / Re: Why it could be slower render with a sf::VertexArray than using sf::Sprites ?

« on: April 05, 2013, 06:04:37 pm »

Great!. Very notable performance improvement.

2

Graphics / Re: Why it could be slower render with a sf::VertexArray than using sf::Sprites ?

« on: April 05, 2013, 04:12:09 pm »

I cannot prove it right now, but I have done it with a big tiled map and the improvement was very high. When I fix it i'll tell you the result. Thanks a lot again.

3

Graphics / Re: Why it could be slower render with a sf::VertexArray than using sf::Sprites ?

« on: April 05, 2013, 03:58:27 pm »

I'm very shamed. Thank you.

4

Graphics / Why it could be slower render with a sf::VertexArray than using sf::Sprites ?

« on: April 05, 2013, 01:54:17 pm »

Thanks in advance, the point is the next. I have making a little particle engine, the problem come when i tried to optimize it using a vertexarray to render it. The first implementation, using sf::Sprites, could render 10K particles without problem in my machine, but when I have changed to a sf::VertexArray implementation the render process become slower, it cannot mantain the framerate with 3K particles. What Could I be doing wrong?.

One thing more, I belive noticed the problem is in the RenderWindow::draw call because I have monitoring the program with and without this call. I let you some code snippet. Thanks again.

void System::draw (sf::RenderWindow& theWindow)
{
   mVertices.clear();

   std::list<Particle>::const_iterator it;
   for(it = mParticles.begin();it != mParticles.end();it++)
   {

      sf::Transform anTransform;

      anTransform.translate(it->getPosition().x,it->getPosition().y);
      anTransform.rotate(it->getAngle());
      anTransform.scale(it->getScale().x,it->getScale().y);
      sf::Rect<int> anTexRect = it->getTexRect();

      sf::Vector2f anPositions[4];
      anPositions[0] = anTransform.transformPoint(sf::Vector2f(-(anTexRect.width / 2),-(anTexRect.height /2)));
      anPositions[1] = anTransform.transformPoint(sf::Vector2f( (anTexRect.width / 2),-(anTexRect.height /2)));
      anPositions[2] = anTransform.transformPoint(sf::Vector2f( (anTexRect.width / 2), (anTexRect.height /2)));
      anPositions[3] = anTransform.transformPoint(sf::Vector2f(-(anTexRect.width / 2), (anTexRect.height /2)));

      sf::Vector2f anTexCoords[4];
      anTexCoords[0] = sf::Vector2f(anTexRect.left,                  anTexRect.top);
      anTexCoords[1] = sf::Vector2f(anTexRect.left + anTexRect.width, anTexRect.top);
      anTexCoords[2] = sf::Vector2f(anTexRect.left + anTexRect.width, anTexRect.top + anTexRect.height);
      anTexCoords[3] = sf::Vector2f(anTexRect.left,                  anTexRect.top + anTexRect.height);

      for (int i = 0; i < 4;i++)
      {
         mVertices.append(sf::Vertex(anPositions[i], sf::Color(255, 255, 255, 255),anTexCoords[i]));
      }
      theWindow.draw(mVertices,mStates);
   }