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
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
using Celesteia.Graphics;
using Celesteia.Graphics.Lighting;
using Celesteia.Resources;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using MonoGame.Extended.Entities.Systems;
using Celesteia.Resources.Types;
using Celesteia.Game.Planets;
using System.Threading.Tasks;
using System.Collections.Generic;
namespace Celesteia.Game.Systems {
public class LightingSystem : IUpdateSystem, IDrawSystem
{
private readonly Camera2D _camera;
private readonly SpriteBatch _spriteBatch;
private readonly ChunkMap _chunkMap;
public LightingSystem(Camera2D camera, SpriteBatch spriteBatch, ChunkMap chunkMap) {
_camera = camera;
_spriteBatch = spriteBatch;
_chunkMap = chunkMap;
}
public void Dispose() { }
private int _lightRenderDistance = 5;
private Dictionary<byte, BlockLightProperties> lightingDictionary;
public void Initialize(MonoGame.Extended.Entities.World world) {
int _size = 2 * _lightRenderDistance * Chunk.CHUNK_SIZE;
_lightMap = new LightMap(_size, _size);
_texture = new Texture2D(_spriteBatch.GraphicsDevice, _size, _size);
lightingDictionary = new Dictionary<byte, BlockLightProperties>();
}
private LightMap _lightMap;
private Texture2D _texture;
private bool drawTexture = false;
private Task _lightUpdate;
public void Update(GameTime gameTime)
{
if (_lightUpdate == null || (_lightUpdate != null && _lightUpdate.IsCompleted))
_lightUpdate = Task.Factory.StartNew(() => UpdateLight());
if (drawTexture) UpdateTexture();
}
private Point _position;
private void UpdatePosition() {
_position = ChunkVector.FromVector2(_camera.Center).Resolve() - new Point(_lightRenderDistance * Chunk.CHUNK_SIZE);
}
private void UpdateTexture() {
_drawPosition = _position.ToVector2();
_texture.SetData<Color>(_lightMap.GetColors(), 0, _lightMap.GetColorCount());
drawTexture = false;
}
private void UpdateLight() {
UpdatePosition();
UpdateEmission();
_lightMap.Propagate();
_lightMap.CreateColorMap();
drawTexture = true;
}
private BlockState _block;
private void UpdateEmission() {
for (int i = 0; i < _lightMap.Width; i++) {
for (int j = 0; j < _lightMap.Height; j++) {
if (!(_block = _chunkMap.GetForeground(i + _position.X, j + _position.Y)).Empty && _lightMap.AddForeground(i, j, _block.Type.Light)) continue;
if (!(_block = _chunkMap.GetBackground(i + _position.X, j + _position.Y)).Empty && _lightMap.AddBackground(i, j, _block.Type.Light)) continue;
_lightMap.AddLight(i, j, true, LightColor.ambient, 4);
}
}
}
private BlendState multiply = new BlendState() {
ColorBlendFunction = BlendFunction.Add,
ColorSourceBlend = Blend.DestinationColor,
ColorDestinationBlend = Blend.Zero,
};
private Vector2 _drawPosition;
public void Draw(GameTime gameTime)
{
_spriteBatch.Begin(SpriteSortMode.Immediate, multiply, SamplerState.LinearClamp, null, null, null, _camera.GetViewMatrix());
_spriteBatch.Draw(_texture, _drawPosition, Color.White);
_spriteBatch.End();
}
}
}
|
