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buildLevel.js
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//Takes a JSON level object and parses it for different tiles.
//Tiles of type 0 are are disregarded as empty space
//Tiles of type 1 are invisible and are used for creating collisions between player and the level
//All other tiles are rendered with special cases for tile rotation and transformation
//Returns an array of tiles that should be checked for collisions
function buildLevel(level) {
let rows = 0,
cols = 0,
i = 0,
tx = 0,
ty = 0;
let collArr = [];
let sprite = new Sprite(frame("images/PNG/environment/layers/tilesets.png", 0, 0, 16, 16));;
for( var layer = 0; layer < 3; layer++){
for( rows = 0; rows < level.height; rows++){
for( cols = 0; cols < level.width; cols++){
// setting up iterator and tileX and tileY for clarity
i = (level.width*rows+cols);
tx = (((level.layers[layer].data[i] % 24) * level.tilewidth) - level.tilewidth);
ty = (Math.floor(level.layers[layer].data[i]/24) * level.tilewidth)
switch(level.layers[layer].data[i]){
//no tile
case 0:
break;
//invisible tile, can collide with player sprite
case 1:
sprite = new Sprite(frame("images/PNG/environment/layers/tilesets.png", 0, 0, 16, 16));
sprite.x = cols * level.tilewidth;
sprite.y = rows * level.tileheight;
stage.addChild(sprite);
collArr.push(sprite);
break;
//The rest of the tiles do not get added to collision array to save cpu cycles on collision checks
//Special case tile transformations
case 316:
sprite = new Sprite(frame("images/PNG/environment/layers/props.png", 192, 16, 16, 16));
sprite.x = cols * level.tilewidth;
sprite.y = rows * level.tileheight;
stage.addChild(sprite);
break;
case 331:
sprite = new Sprite(frame("images/PNG/environment/layers/props.png", 192, 32, 16, 16));
sprite.x = cols * level.tilewidth;
sprite.y = rows * level.tileheight;
stage.addChild(sprite);
break;
case 346:
sprite = new Sprite(frame("images/PNG/environment/layers/props.png", 192, 48, 16, 16));
sprite.x = cols * level.tilewidth;
sprite.y = rows * level.tileheight;
stage.addChild(sprite);
collArr.push(sprite);
break;
case 3221225559:
break;
case 2684354780:
sprite = new Sprite(frame("images/PNG/environment/layers/tilesets.png", 48, 144, 16, 16));
sprite.anchor.x = 0.5;
sprite.anchor.y = 0.5;
sprite.rotation = Math.PI/2;
sprite.anchor.x = 0;
sprite.anchor.y = 1;
sprite.x = cols * level.tilewidth;
sprite.y = rows * level.tileheight;
stage.addChild(sprite);
break;
case 2684354804:
sprite = new Sprite(frame("images/PNG/environment/layers/tilesets.png", 48, 160, 16, 16));
sprite.anchor.x = 0.5;
sprite.anchor.y = 0.5;
sprite.rotation = Math.PI/2;
sprite.anchor.x = 0;
sprite.anchor.y = 1;
sprite.x = cols * level.tilewidth;
sprite.y = rows * level.tileheight;
stage.addChild(sprite);
break;
case 2684354816:
sprite = new Sprite(frame("images/PNG/environment/layers/tilesets.png", 240, 160, 16, 16));
sprite.anchor.x = 0.5;
sprite.anchor.y = 0.5;
sprite.rotation = Math.PI/2;
sprite.anchor.x = 0;
sprite.anchor.y = 1;
sprite.x = cols * level.tilewidth;
sprite.y = rows * level.tileheight;
stage.addChild(sprite);
break;
case 2684354840:
sprite = new Sprite(frame("images/PNG/environment/layers/tilesets.png", 240, 176, 16, 16));
sprite.anchor.x = 0.5;
sprite.anchor.y = 0.5;
sprite.rotation = Math.PI/2;
sprite.anchor.x = 0;
sprite.anchor.y = 1;
sprite.x = cols * level.tilewidth;
sprite.y = rows * level.tileheight;
stage.addChild(sprite);
break;
case 3221225618:
sprite = new Sprite(frame("images/PNG/environment/layers/tilesets.png", 16, 96, 16, 16));
sprite.anchor.x = 0.5;
sprite.anchor.y = 0.5;
sprite.rotation = Math.PI;
sprite.anchor.x = 1;
sprite.anchor.y = 1;
sprite.x = cols * level.tilewidth;
sprite.y = rows * level.tileheight;
stage.addChild(sprite);
break;
case 3221225620:
sprite = new Sprite(frame("images/PNG/environment/layers/tilesets.png", 48, 96, 16, 16));
sprite.anchor.x = 0.5;
sprite.anchor.y = 0.5;
sprite.rotation = Math.PI;
sprite.anchor.x = 1;
sprite.anchor.y = 1;
sprite.x = cols * level.tilewidth;
sprite.y = rows * level.tileheight;
stage.addChild(sprite);
break;
case 3221225621:
sprite = new Sprite(frame("images/PNG/environment/layers/tilesets.png", 64, 96, 16, 16));
sprite.anchor.x = 0.5;
sprite.anchor.y = 0.5;
sprite.rotation = Math.PI;
sprite.anchor.x = 1;
sprite.anchor.y = 1;
sprite.x = cols * level.tilewidth;
sprite.y = rows * level.tileheight;
stage.addChild(sprite);
break;
case 3221225642:
sprite = new Sprite(frame("images/PNG/environment/layers/tilesets.png", 16, 112, 16, 16));
sprite.anchor.x = 0.5;
sprite.anchor.y = 0.5;
sprite.rotation = Math.PI;
sprite.anchor.x = 1;
sprite.anchor.y = 1;
sprite.x = cols * level.tilewidth;
sprite.y = rows * level.tileheight;
stage.addChild(sprite);
break;
case 3221225644:
sprite = new Sprite(frame("images/PNG/environment/layers/tilesets.png", 64, 112, 16, 16));
sprite.anchor.x = 0.5;
sprite.anchor.y = 0.5;
sprite.rotation = Math.PI;
sprite.anchor.x = 1;
sprite.anchor.y = 1;
sprite.x = cols * level.tilewidth;
sprite.y = rows * level.tileheight;
stage.addChild(sprite);
break;
case 3221225645:
sprite = new Sprite(frame("images/PNG/environment/layers/tilesets.png", 48, 112, 16, 16));
sprite.anchor.x = 0.5;
sprite.anchor.y = 0.5;
sprite.rotation = Math.PI;
sprite.anchor.x = 1;
sprite.anchor.y = 1;
sprite.x = cols * level.tilewidth;
sprite.y = rows * level.tileheight;
stage.addChild(sprite);
break;
case 3221225666:
sprite = new Sprite(frame("images/PNG/environment/layers/tilesets.png", 16, 128, 16, 16));
sprite.anchor.x = 0.5;
sprite.anchor.y = 0.5;
sprite.rotation = Math.PI;
sprite.anchor.x = 1;
sprite.anchor.y = 1;
sprite.x = cols * level.tilewidth;
sprite.y = rows * level.tileheight;
stage.addChild(sprite);
break;
//All regular tiles pulled from tilesheet. Position calculuation based on tile number in JSON file
default:
sprite = new Sprite(frame("images/PNG/environment/layers/tilesets.png", tx, ty, level.tilewidth, level.tilewidth));
sprite.x = cols * level.tilewidth;
sprite.y = rows * level.tileheight;
stage.addChild(sprite);
}
}
}
}
return collArr;
}