Загрузка Quake Engine Карты в Three.js: Часть № 1 – Диаграмм

{
 // entity 0
 "property_key" "property_value"
 {
  // brush (optional)
 }
}
{
  // entity 1
}
// (...)
{
  // entity N
}

// Game: PersonalIdol
// Format: Standard
// entity 0
{
    "classname" "worldspawn"
    "light" "0.3"
    "_tb_textures" "./debug;./textures"
    // brush 0
    {
        ( -64 -64 128 ) ( -64 -64 -0 ) ( -64 64 -0 ) textures/texture-crate-128x128 0 0 0 1 1
        ( 64 -64 128 ) ( 64 -64 -0 ) ( -64 -64 -0 ) textures/texture-crate-128x128 0 0 0 1 1
        ( -64 -64 -0 ) ( 64 -64 -0 ) ( 64 64 -0 ) textures/texture-crate-128x128 0 0 0 1 1
        ( 64 -64 128 ) ( -64 -64 128 ) ( -64 64 128 ) textures/texture-crate-128x128 0 0 0 1 1
        ( -64 64 -0 ) ( 64 64 -0 ) ( -64 64 128 ) textures/texture-crate-128x128 0 64 0 1 1
        ( -64 64 128 ) ( 64 64 -0 ) ( 64 -64 128 ) debug/texture-uv-1024x1024 0 -0 0 1 1
        ( 64 64 -0 ) ( 64 -64 -0 ) ( 64 -64 128 ) textures/texture-crate-128x128 0 64 0 1 1
    }
}
// entity 1
{
    "classname" "light"
    "origin" "224 192 192"
    "decay" "2"
    "light" "1"
}

1. Split the `.map` file into the separate lines
2. Iterate over each line.
    1. If the line is a comment, then ignore it.
    2. If the line is empty, then ignore it.
    3. If the line is an opening bracket:
        1. If you are inside the entity definition:
            1. If you already are inside the brush definition, then it is an error.
            2. Start current brush buffer and store the current line inside it.
        2. If you are not inside the entity definition, start a new entity buffer.
    4. If it is a closing bracket: 
        1. If you have an opened brush buffer, then close it and save the brush.
        2. If you do not have an opened brush buffer:
            1. If you are not inside the entity definition, then it is an error.
            2. If you are inside the entity definition, then the entity definition is complete.
    5. If you are inside the brush, then it is the half-space definition.
    6. If you are inside the entity, but not in a brush, then it's the entity property.

*parse() {
  const lines = this.content.split(/\r?\n/);


  let currentBrushSketch = null;
  let currentEntitySketch = null;

  // 2. Iterate over each line.
  for (let lineno = 0; lineno < lines.length; lineno += 1) {
    const line = lines[lineno];

    // 2.1. If the line is a comment, then ignore it.
    if (line.startsWith("//") || line.trim().length < 1) {
      continue;
    }

    // 3. If the line is an opening bracket:
    if (line.startsWith("{")) {
      // 3.1. Start current brush buffer and store the current line inside it.
      if (currentEntitySketch) {
        currentBrushSketch = [];
        continue;
      // 3.2. If you are not inside the entity definition, start a new entity buffer.
      } else if (!currentEntitySketch) {
        currentEntitySketch = {
          brushes: [],
          props: [],
        };
        continue;
      // 3.1.1. If you already are inside the brush definition, then it is an error.
      } else {
        throw new Error("Unexpected opening bracket.");
      }
    }

    // 2.4 If it is a closing bracket: 
    if (line.startsWith("}")) {
      // 2.4.1. If you have an opened brush buffer, then close it and save the brush.
      if (currentBrushSketch) {
        if (!currentEntitySketch) {
          throw new Error("Expected brush to be nested inside entity");
        }
        currentEntitySketch.brushes.push(new QuakeBrush(breadcrumbs.add("QuakeBrush"), currentBrushSketch));
        currentBrushSketch = null;
        continue;
      // 2.4.2. If you do not have an opened brush buffer:
      } else if (currentEntitySketch) {
        // 2.4.2.2. If you are inside the entity definition, then the entity definition is complete.
        yield {
          brushes: currentEntitySketch.brushes,
          properties: currentEntitySketch.props,
        }

        currentEntitySketch = null;
        continue;
      } else {
        // 2.4.2.1. If you are not inside the entity definition, then it is an error.
        throw new Error("Unexpected closing bracket.");
      }
    }

    if (currentBrushSketch) {
      // 5. If you are inside the brush, then it is the half-space definition.
      currentBrushSketch.push(line);
      continue;
    }

    // 6. If you are inside the entity, but not in a brush, then it's the entity property.
    if (currentEntitySketch) {
      currentEntitySketch.props.push(line);
      continue;
    }

    throw new Error("Unexpected line.");
  }

  // these two protect us from corrupted maps
  if (currentBrushSketch) {
    throw new Error("Unexpected end of brush data.");
  }

  if (currentEntitySketch) {
    throw new Error("Unexpected end of entity data.");
  }
}