1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
using System.Collections.Generic;
using Celesteia.Game.Planets;
using Celesteia.Graphics;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using MonoGame.Extended.Entities.Systems;
namespace Celesteia.Game.Systems {
public class ChunkMapRenderSystem : IUpdateSystem, IDrawSystem
{
private readonly Camera2D _camera;
private readonly SpriteBatch _spriteBatch;
private ChunkVector _lastChunkPos;
private ChunkVector _pivotChunkPos => ChunkVector.FromVector2(_camera.Center);
public int RenderDistance = 4;
private ChunkMap _chunkMap;
public ChunkMapRenderSystem(Camera2D camera, SpriteBatch spriteBatch, ChunkMap chunkMap) {
_camera = camera;
_spriteBatch = spriteBatch;
_chunkMap = chunkMap;
}
public void Initialize(MonoGame.Extended.Entities.World world) {}
private ChunkVector _v;
private List<ChunkVector> activeChunks = new List<ChunkVector>();
public void Update(GameTime gameTime)
{
if (_lastChunkPos != _pivotChunkPos) {
activeChunks.Clear();
for (int i = -RenderDistance; i <= RenderDistance; i++) {
_v.X = _pivotChunkPos.X + i;
for (int j = -RenderDistance; j <= RenderDistance; j++) {
_v.Y = _pivotChunkPos.Y + j;
if (!_chunkMap.ChunkIsInMap(_v)) continue;
activeChunks.Add(_v);
}
}
_lastChunkPos = _pivotChunkPos;
}
}
public void Draw(GameTime gameTime) {
_spriteBatch.Begin(SpriteSortMode.Deferred, BlendState.NonPremultiplied, SamplerState.PointWrap, null, null, null, _camera.GetViewMatrix());
// Draw every chunk in view.
foreach (ChunkVector cv in activeChunks) DrawChunk(cv, gameTime, _spriteBatch);
_spriteBatch.End();
}
private void DrawChunk(ChunkVector cv, GameTime gameTime, SpriteBatch spriteBatch) {
Chunk c = _chunkMap.GetChunk(cv);
if (c != null) c.Draw(gameTime, spriteBatch);
}
public void Dispose() {}
}
}
|
