Messages

1

Graphics / VertexArray with different textures per vertex

« on: November 27, 2019, 11:21:19 am »

I'm trying to make a terraria clone, and draw the tiles with a VertexArray. The problem is that I don't see a way to set a custom texture for every vertex. Is the only solution I can do to create a container for every tile type and draw a VertexArray for every container?

sf::VertexArray va(sf::Quads, 68 * 18);
    int y = 0;
    int x = 0;
    sf::Texture sprite_sheet;
    sprite_sheet = sfml_resources::get().get_spritesheet();
    unsigned i = 0;
    for(tile& t : m_game.get_tiles()){
      y = (17 * (t.get_state() / 16));
      x = (18 * t.get_state()) % (16 * 18);
      sf::Vertex* quad = &va[i];
      const int tx = static_cast<int>(t.get_x());
      const int ty = static_cast<int>(t.get_y());
      quad[0].position = sf::Vector2f(tx, ty);
      quad[1].position = sf::Vector2f(tx + 32, ty);
      quad[2].position = sf::Vector2f(tx + 32, ty + 32);
      quad[3].position = sf::Vector2f(tx, ty + 32);
      quad[0].texCoords = sf::Vector2f(x, y);
      quad[1].texCoords = sf::Vector2f(x + 16, y);
      quad[2].texCoords = sf::Vector2f(x + 16, y + 16);
      quad[3].texCoords = sf::Vector2f(x, y + 16);
      i += 4;
    }
    m_window.draw(va, &sprite_sheet);

2

General / Graphic problem

« on: September 26, 2019, 07:32:34 pm »

I recently switched to using a vertex array for displaying the tiles, but sometimes I get lines between them, as you can see in the first attachment. And when I move it goes back to normal, as you can see in the second attachment. Does anyone know why this happens?

Code:

sf::VertexArray va(sf::Quads, m_game.get_loaded_chunks().size() * 2048);
int y = 0;
int x = 0;
sf::Texture sprite_sheet;
sprite_sheet = sfml_resources::get().get_spritesheet();
int i = 0;
for(chunk c : m_game.get_loaded_chunks()){
  for(tile& t : c.get_tiles()){
    y = (t.get_type() / 57) * 16;
    x = (17 * t.get_type()) % (57 * 17);
    sf::Vertex* quad = &va[i];
    quad[0].position = sf::Vector2f(t.get_x() - m_game.get_camera().x, t.get_y() - m_game.get_camera().y);
    quad[1].position = sf::Vector2f(t.get_x() + 32 - m_game.get_camera().x, t.get_y() - m_game.get_camera().y);
    quad[2].position = sf::Vector2f(t.get_x() + 32 - m_game.get_camera().x, t.get_y() + 32 - m_game.get_camera().y);
    quad[3].position = sf::Vector2f(t.get_x() - m_game.get_camera().x, t.get_y() + 32 - m_game.get_camera().y);
    quad[0].texCoords = sf::Vector2f(x, y);
    quad[1].texCoords = sf::Vector2f(x + 16, y);
    quad[2].texCoords = sf::Vector2f(x + 16, y + 16);
    quad[3].texCoords = sf::Vector2f(x, y + 16);
    if(t.get_attribute() != 0){
      sf::Vertex* att = &va[i + 4];
      att[0].position = sf::Vector2f(t.get_x() - m_game.get_camera().x, t.get_y() - m_game.get_camera().y);
      att[1].position = sf::Vector2f(t.get_x() + 32 - m_game.get_camera().x, t.get_y() - m_game.get_camera().y);
      att[2].position = sf::Vector2f(t.get_x() + 32 - m_game.get_camera().x, t.get_y() + 32 - m_game.get_camera().y);
      att[3].position = sf::Vector2f(t.get_x() - m_game.get_camera().x, t.get_y() + 32 - m_game.get_camera().y);
      if(t.get_attribute() == 1){
        att[0].texCoords = sf::Vector2f(221, 153);
        att[1].texCoords = sf::Vector2f(221 + 16, 153);
        att[2].texCoords = sf::Vector2f(221 + 16, 153 + 16);
        att[3].texCoords = sf::Vector2f(221, 153 + 16);
      }
      else if(t.get_attribute() == 2){
        att[0].texCoords = sf::Vector2f(459, 187);
        att[1].texCoords = sf::Vector2f(459 + 16, 187);
        att[2].texCoords = sf::Vector2f(459 + 16, 187 + 16);
        att[3].texCoords = sf::Vector2f(459, 187 + 16);
      }
      else if(t.get_attribute() == 3){
        att[0].texCoords = sf::Vector2f(443, 170);
        att[1].texCoords = sf::Vector2f(443 + 16, 170);
        att[2].texCoords = sf::Vector2f(443 + 16, 170 + 16);
        att[3].texCoords = sf::Vector2f(443, 170 + 16);
      }
    }
    i += 8;
  }
}
m_window.draw(va, &sprite_sheet);

3

General / Re: Access objects in a particular order

« on: September 25, 2019, 05:04:06 pm »

Some don't get loaded, some do.

I call the function everytime the player moves a complete chunk

if(((static_cast<int>(fabs(m_camera.x) + 0.5) % 512 >= -5
  && static_cast<int>(fabs(m_camera.x) + 0.5) % 512 <= 5)
  || (static_cast<int>(fabs(m_camera.y) + 0.5) % 512 >= -5
  && static_cast<int>(fabs(m_camera.y) + 0.5) % 512 <= 5))
  && m_last_load != m_camera.get_location()){
    loaded_chunks = load_chunks();
  }

If you want, here is the complete project.

4

General / Access objects in a particular order

« on: September 23, 2019, 08:03:54 pm »

To load the chunks which have to be loaded related to where the camera is in my game, I have written this function, but I can't get it to load the correct chunks. This is my code:

std::vector<chunk> game::load_chunks(){
  std::vector<chunk> loaded_chunks;
  int x = (m_camera.x + 960) / 512;
  int y = (m_camera.y + 540) / 512;
  int width = static_cast<int>(m_width / 512 + 0.99);
  int height = static_cast<int>(m_height / 512 + 0.99);
  int amount = width * height;
  int i;
  std::cout << m_camera.x << " " << m_camera.y << std::endl;
  std::cout << "x " << x << " y " << y << std::endl;
  std::cout << width << " " << height << std::endl;
  std::cout << -(amount / 2) << " " << (amount / 2) << std::endl;
  for(i = -(amount / 2); i < (amount / 2); i++){
    std::cout << x + (i % width) << " " << y + (i / height) << std::endl;
    auto find = m_chunks.find(std::make_pair(x + (i % width), y + (i / height)));
    if(find != m_chunks.end()) loaded_chunks.push_back(find->second);
  }
  m_last_load.x = m_camera.x;
  m_last_load.y = m_camera.y;
  return loaded_chunks;
}

Can anybody help?

5

Graphics / Re: sf::VertexArray issue

« on: September 18, 2019, 06:27:21 pm »

I suggest to sit down and draw the points out on paper and maybe even the formulas to get there, that way you can think of the math independent of the code and are less tempted to just trial-and-error some solution.

Secondly, I recommend to use your debugger and step through the code step by step, checking the values with the expected values that you calculated on paper.

Thanks for the reply, however I fixed it by something unrelated a couple of minutes later and forgot to mention it. Anyway, thanks for the tips if I ever get an issue like this again!

6

Graphics / Re: sf::VertexArray issue

« on: September 17, 2019, 06:49:37 pm »

Now I have this problem. Can anybody spot the issue?

Updated code:

sf::VertexArray va(sf::Quads, m_game.get_loaded_chunks().size() * 1024);
    int y = 0;
    int x = 0;
    sf::Texture sprite_sheet;
    sprite_sheet = sfml_resources::get().get_spritesheet();
    int i = 0;
    for(chunk c : m_game.get_loaded_chunks()){
      for(tile t : c.get_tiles()){
        y = (t.get_type() / 57) * 16;
        x = (17 * t.get_type()) % (57 * 17);
        sf::Vertex* quad = &va[i];
        quad[0].position = sf::Vector2f(t.get_x() - m_game.get_camera().x, t.get_y() - m_game.get_camera().y);
        quad[1].position = sf::Vector2f(t.get_x() + 16 - m_game.get_camera().x, t.get_y() - m_game.get_camera().y);
        quad[2].position = sf::Vector2f(t.get_x() + 16 - m_game.get_camera().x, t.get_y() + 16 - m_game.get_camera().y);
        quad[3].position = sf::Vector2f(t.get_x() - m_game.get_camera().x, t.get_y() + 16 - m_game.get_camera().y);
        quad[0].texCoords = sf::Vector2f(x, y);
        quad[1].texCoords = sf::Vector2f(x + 16, y);
        quad[2].texCoords = sf::Vector2f(x + 16, y + 16);
        quad[3].texCoords = sf::Vector2f(x, y + 16);
        i += 4;
      }
    }
    m_window.draw(va, &sprite_sheet);

7

Graphics / Re: sf::VertexArray issue

« on: September 17, 2019, 06:02:25 pm »

If a quad is 4 vertices, shouldn't you do i += 4; instead of i++;?

Ah, thank you.

What's the point of multiplying something by 16 then dividing it by 16? (none)

I don't know why I did that, thanks for pointing out...

8

Graphics / sf::VertexArray issue

« on: September 17, 2019, 03:32:59 pm »

I have this to draw a tile map:

sf::VertexArray va(sf::Quads, 10240);
int y = 0;
int x = 0;
sf::Texture sprite_sheet = sfml_resources::get().get_spritesheet();
int i = 0;
for(chunk c : m_game.get_loaded_chunks()){
   for(tile t : c.get_tiles()){
     y = (16 * (t.get_type() / 57)) / 16;
     x = (17 * t.get_type()) % (57 * 17);
     sf::Vertex* quad = &va[i];
     quad[0].position = sf::Vector2f(t.get_x() - m_game.get_camera().x, t.get_y() - m_game.get_camera().y);
     quad[1].position = sf::Vector2f(t.get_x() + 16 - m_game.get_camera().x, t.get_y() - m_game.get_camera().y);
     quad[2].position = sf::Vector2f(t.get_x() + 16 - m_game.get_camera().x, t.get_y() + 16 - m_game.get_camera().y);
     quad[3].position = sf::Vector2f(t.get_x() - m_game.get_camera().x, t.get_y() + 16 - m_game.get_camera().y);
     quad[0].texCoords = sf::Vector2f(x, y);
     quad[1].texCoords = sf::Vector2f(x + 16, y);
     quad[2].texCoords = sf::Vector2f(x + 16, y + 16);
     quad[3].texCoords = sf::Vector2f(x, y + 16);
     i++;
   }
}
m_window.draw(va, &sprite_sheet);

But when I run it the position is weird, see screenshot. Why is this happening?

9

Window / Single key key repetition

« on: September 16, 2019, 08:11:41 pm »

I have this function to process inputs:

void sfml_game::process_input(){
  if(sf::Keyboard::isKeyPressed(sf::Keyboard::Left)) m_game.get_camera().move(sf::Vector2f(-1, 0));
  if(sf::Keyboard::isKeyPressed(sf::Keyboard::Right)) m_game.get_camera().move(sf::Vector2f(1, 0));
  if(sf::Keyboard::isKeyPressed(sf::Keyboard::Up)) m_game.get_camera().move(sf::Vector2f(0, -1));
  if(sf::Keyboard::isKeyPressed(sf::Keyboard::Down)) m_game.get_camera().move(sf::Vector2f(0, 1));
  if(sf::Keyboard::isKeyPressed(sf::Keyboard::F3)) m_debug_items = !m_debug_items;
}

Now I want to disable key repetition for F3 only, because I use it to toggle something. In it current state it just loops trough until I release the button. Is it possible to disable key repetition for one button only?