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[client] Refactor ChunkCache a bit to start adding chunk loading logic

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This commit is contained in:
Starbeamrainbowlabs 2017-06-22 22:38:05 +01:00
parent 5e59d7098a
commit 1935f6350e
1 changed files with 31 additions and 7 deletions
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38
Nibriboard/ClientFiles/ChunkCache.js
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@ -35,6 +35,20 @@ class ChunkCache
return !hasChunk;
}
update(dt, visibleArea)
{
let chunkSize = this.boardWindow.gridSize;
let chunkArea = this.CalculateChunkArea(visibleArea, chunkSize);
for(let cx = chunkArea.x; cx <= chunkArea.x + chunkArea.width; cx += chunkSize)
{
for(let cy = chunkArea.y; cy <= chunkArea.y + chunkArea.height; cy += chunkSize)
{
}
}
}
/**
* Renders the specified area to the given canvas with the given context.
* @param {Rectangle} visibleArea The area to render.
@ -47,13 +61,7 @@ class ChunkCache
{
context.save();
let chunkSize = this.boardWindow.gridSize;
let chunkArea = new Rectangle(
Math.floor(visibleArea.x / chunkSize) * chunkSize,
Math.floor(visibleArea.y / chunkSize) * chunkSize,
(Math.ceil((Math.abs(visibleArea.x) + (visibleArea.width)) / chunkSize) * chunkSize),
(Math.ceil((Math.abs(visibleArea.y) + (visibleArea.height)) / chunkSize) * chunkSize)
);
let chunkArea = this.CalculateChunkArea(visibleArea, chunkSize);
for(let cx = chunkArea.x; cx <= chunkArea.x + chunkArea.width; cx += chunkSize)
{
@ -104,4 +112,20 @@ class ChunkCache
}
}
/**
* Calculates the area of the chunks that cover a specified box.
* @param {Rectangle} visibleArea The box to calculate the covering chunks for.
* @param {number} chunkSize The size of the chunks that cover the box.
* @return {Rectangle} The area of the chunks that cover the box.
*/
ChunkCache.CalculateChunkArea = function(visibleArea, chunkSize) {
return new Rectangle(
Math.floor(visibleArea.x / chunkSize) * chunkSize,
Math.floor(visibleArea.y / chunkSize) * chunkSize,
(Math.ceil((Math.abs(visibleArea.x) + (visibleArea.width)) / chunkSize) * chunkSize),
(Math.ceil((Math.abs(visibleArea.y) + (visibleArea.height)) / chunkSize) * chunkSize)
);
}
export default ChunkCache;