727 lines
32 KiB
C#
727 lines
32 KiB
C#
using Microsoft.Xna.Framework;
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using Microsoft.Xna.Framework.Graphics;
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using Microsoft.Xna.Framework.Content;
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using System.Collections.Generic;
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using System.Linq;
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using System;
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using Barotrauma.Items.Components;
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using Barotrauma.Extensions;
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namespace Barotrauma.Lights
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{
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class LightManager
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{
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private const float AmbientLightUpdateInterval = 0.2f;
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private const float AmbientLightFalloff = 0.8f;
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/// <summary>
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/// Enables a feature that makes lights inside the hull increase the brightness of the entire hull
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/// and adjacent ones to some extent, if there are gaps for the lights to pass through.
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/// Prevents unnaturally dark looking shadows in otherwise well-lit submarines, but disabled at least for
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/// the time being because it makes the lighting behave unpredictably and may cause rooms to appear
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/// excessively bright if different lighting conditions aren't tested and accounted for.
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/// </summary>
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private static readonly bool UseHullSpecificAmbientLight = false;
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public static Entity ViewTarget { get; set; }
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private float currLightMapScale;
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public Color AmbientLight;
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public RenderTarget2D LightMap
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{
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get;
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private set;
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}
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public RenderTarget2D LimbLightMap
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{
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get;
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private set;
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}
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public RenderTarget2D LosTexture
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{
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get;
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private set;
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}
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public RenderTarget2D HighlightMap
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{
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get;
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private set;
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}
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private readonly Texture2D highlightRaster;
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private BasicEffect lightEffect;
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public Effect LosEffect { get; private set; }
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public Effect SolidColorEffect { get; private set; }
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private List<LightSource> lights;
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public bool LosEnabled = true;
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public LosMode LosMode = LosMode.Transparent;
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public bool LightingEnabled = true;
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public bool ObstructVision;
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private Texture2D visionCircle;
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private Dictionary<Hull, Color> hullAmbientLights;
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private Dictionary<Hull, Color> smoothedHullAmbientLights;
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private float ambientLightUpdateTimer;
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public IEnumerable<LightSource> Lights
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{
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get { return lights; }
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}
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public LightManager(GraphicsDevice graphics, ContentManager content)
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{
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lights = new List<LightSource>();
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AmbientLight = new Color(20, 20, 20, 255);
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visionCircle = Sprite.LoadTexture("Content/Lights/visioncircle.png");
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highlightRaster = Sprite.LoadTexture("Content/UI/HighlightRaster.png");
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GameMain.Instance.OnResolutionChanged += () =>
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{
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CreateRenderTargets(graphics);
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};
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CrossThread.RequestExecutionOnMainThread(() =>
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{
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CreateRenderTargets(graphics);
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#if WINDOWS
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LosEffect = content.Load<Effect>("Effects/losshader");
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SolidColorEffect = content.Load<Effect>("Effects/solidcolor");
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#else
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LosEffect = content.Load<Effect>("Effects/losshader_opengl");
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SolidColorEffect = content.Load<Effect>("Effects/solidcolor_opengl");
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#endif
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if (lightEffect == null)
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{
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lightEffect = new BasicEffect(GameMain.Instance.GraphicsDevice)
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{
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VertexColorEnabled = true,
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TextureEnabled = true,
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Texture = LightSource.LightTexture
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};
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}
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});
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hullAmbientLights = new Dictionary<Hull, Color>();
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smoothedHullAmbientLights = new Dictionary<Hull, Color>();
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}
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private void CreateRenderTargets(GraphicsDevice graphics)
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{
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var pp = graphics.PresentationParameters;
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currLightMapScale = GameMain.Config.LightMapScale;
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LightMap?.Dispose();
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LightMap = CreateRenderTarget();
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LimbLightMap?.Dispose();
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LimbLightMap = CreateRenderTarget();
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HighlightMap?.Dispose();
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HighlightMap = CreateRenderTarget();
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RenderTarget2D CreateRenderTarget()
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{
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return new RenderTarget2D(graphics,
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(int)(GameMain.GraphicsWidth * GameMain.Config.LightMapScale), (int)(GameMain.GraphicsHeight * GameMain.Config.LightMapScale), false,
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pp.BackBufferFormat, pp.DepthStencilFormat, pp.MultiSampleCount,
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RenderTargetUsage.DiscardContents);
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}
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LosTexture?.Dispose();
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LosTexture = new RenderTarget2D(graphics,
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(int)(GameMain.GraphicsWidth * GameMain.Config.LightMapScale),
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(int)(GameMain.GraphicsHeight * GameMain.Config.LightMapScale), false, SurfaceFormat.Color, DepthFormat.None);
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}
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public void AddLight(LightSource light)
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{
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if (!lights.Contains(light)) lights.Add(light);
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}
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public void RemoveLight(LightSource light)
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{
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lights.Remove(light);
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}
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public void OnMapLoaded()
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{
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foreach (LightSource light in lights)
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{
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light.NeedsHullCheck = true;
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light.NeedsRecalculation = true;
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}
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}
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public void Update(float deltaTime)
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{
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if (UseHullSpecificAmbientLight)
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{
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if (ambientLightUpdateTimer > 0.0f)
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{
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ambientLightUpdateTimer -= deltaTime;
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}
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else
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{
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CalculateAmbientLights();
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ambientLightUpdateTimer = AmbientLightUpdateInterval;
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}
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foreach (Hull hull in hullAmbientLights.Keys)
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{
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if (!smoothedHullAmbientLights.ContainsKey(hull))
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{
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smoothedHullAmbientLights.Add(hull, Color.TransparentBlack);
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}
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}
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foreach (Hull hull in smoothedHullAmbientLights.Keys.ToList())
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{
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Color targetColor = Color.TransparentBlack;
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hullAmbientLights.TryGetValue(hull, out targetColor);
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smoothedHullAmbientLights[hull] = Color.Lerp(smoothedHullAmbientLights[hull], targetColor, deltaTime);
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}
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}
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}
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private List<LightSource> activeLights = new List<LightSource>(capacity: 100);
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public void UpdateLightMap(GraphicsDevice graphics, SpriteBatch spriteBatch, Camera cam, RenderTarget2D backgroundObstructor = null)
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{
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if (!LightingEnabled) return;
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if (Math.Abs(currLightMapScale - GameMain.Config.LightMapScale) > 0.01f)
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{
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//lightmap scale has changed -> recreate render targets
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CreateRenderTargets(graphics);
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}
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Matrix spriteBatchTransform = cam.Transform * Matrix.CreateScale(new Vector3(GameMain.Config.LightMapScale, GameMain.Config.LightMapScale, 1.0f));
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Matrix transform = cam.ShaderTransform
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* Matrix.CreateOrthographic(GameMain.GraphicsWidth, GameMain.GraphicsHeight, -1, 1) * 0.5f;
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bool highlightsVisible = UpdateHighlights(graphics, spriteBatch, spriteBatchTransform, cam);
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Rectangle viewRect = cam.WorldView;
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viewRect.Y -= cam.WorldView.Height;
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//check which lights need to be drawn
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activeLights.Clear();
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foreach (LightSource light in lights)
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{
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if (!light.Enabled) { continue; }
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if ((light.Color.A < 1 || light.Range < 1.0f) && !light.LightSourceParams.OverrideLightSpriteAlpha.HasValue) { continue; }
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if (light.ParentBody != null)
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{
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light.Position = light.ParentBody.DrawPosition;
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if (light.ParentSub != null) { light.Position -= light.ParentSub.DrawPosition; }
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}
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float range = light.LightSourceParams.TextureRange;
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if (light.LightSprite != null)
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{
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float spriteRange = Math.Max(
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light.LightSprite.size.X * light.SpriteScale.X * (0.5f + Math.Abs(light.LightSprite.RelativeOrigin.X - 0.5f)),
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light.LightSprite.size.Y * light.SpriteScale.Y * (0.5f + Math.Abs(light.LightSprite.RelativeOrigin.Y - 0.5f)));
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range = Math.Max(spriteRange, range);
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}
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if (!MathUtils.CircleIntersectsRectangle(light.WorldPosition, range, viewRect)) { continue; }
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activeLights.Add(light);
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}
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//draw light sprites attached to characters
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//render into a separate rendertarget using alpha blending (instead of on top of everything else with alpha blending)
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//to prevent the lights from showing through other characters or other light sprites attached to the same character
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//---------------------------------------------------------------------------------------------------
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graphics.SetRenderTarget(LimbLightMap);
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graphics.Clear(Color.Black);
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graphics.BlendState = BlendState.NonPremultiplied;
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spriteBatch.Begin(SpriteSortMode.BackToFront, BlendState.NonPremultiplied, transformMatrix: spriteBatchTransform);
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foreach (LightSource light in activeLights)
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{
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if (light.IsBackground) { continue; }
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//draw limb lights at this point, because they were skipped over previously to prevent them from being obstructed
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if (light.ParentBody?.UserData is Limb) { light.DrawSprite(spriteBatch, cam); }
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}
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spriteBatch.End();
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//draw background lights
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//---------------------------------------------------------------------------------------------------
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graphics.SetRenderTarget(LightMap);
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graphics.Clear(Color.Black);
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graphics.BlendState = BlendState.Additive;
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bool backgroundSpritesDrawn = false;
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spriteBatch.Begin(SpriteSortMode.Deferred, BlendState.Additive, transformMatrix: spriteBatchTransform);
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foreach (LightSource light in activeLights)
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{
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if (!light.IsBackground) { continue; }
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light.DrawSprite(spriteBatch, cam);
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if (light.Color.A > 0 && light.Range > 0.0f) { light.DrawLightVolume(spriteBatch, lightEffect, transform); }
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backgroundSpritesDrawn = true;
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}
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GameMain.ParticleManager.Draw(spriteBatch, true, null, Particles.ParticleBlendState.Additive);
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spriteBatch.End();
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//draw a black rectangle on hulls to hide background lights behind subs
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//---------------------------------------------------------------------------------------------------
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Dictionary<Hull, Rectangle> visibleHulls = null;
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if (backgroundSpritesDrawn)
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{
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if (backgroundObstructor != null)
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{
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spriteBatch.Begin(SpriteSortMode.Deferred, BlendState.NonPremultiplied);
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spriteBatch.Draw(backgroundObstructor, new Rectangle(0, 0,
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(int)(GameMain.GraphicsWidth * currLightMapScale), (int)(GameMain.GraphicsHeight * currLightMapScale)), Color.Black);
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spriteBatch.End();
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}
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visibleHulls = GetVisibleHulls(cam);
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spriteBatch.Begin(SpriteSortMode.Deferred, BlendState.Opaque, transformMatrix: spriteBatchTransform);
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foreach (Rectangle drawRect in visibleHulls.Values)
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{
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//TODO: draw some sort of smoothed rectangle
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GUI.DrawRectangle(spriteBatch,
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new Vector2(drawRect.X, -drawRect.Y),
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new Vector2(drawRect.Width, drawRect.Height),
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Color.Black, true);
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}
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spriteBatch.End();
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graphics.BlendState = BlendState.Additive;
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}
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//draw the focused item and character to highlight them,
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//and light sprites (done before drawing the actual light volumes so we can make characters obstruct the highlights and sprites)
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//---------------------------------------------------------------------------------------------------
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spriteBatch.Begin(SpriteSortMode.Deferred, BlendState.Additive, transformMatrix: spriteBatchTransform);
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foreach (LightSource light in activeLights)
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{
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//don't draw limb lights at this point, they need to be drawn after lights have been obstructed by characters
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if (light.IsBackground || light.ParentBody?.UserData is Limb) { continue; }
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light.DrawSprite(spriteBatch, cam);
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}
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spriteBatch.End();
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if (highlightsVisible)
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{
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spriteBatch.Begin(SpriteSortMode.Deferred, BlendState.Additive);
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spriteBatch.Draw(HighlightMap, Vector2.Zero, Color.White);
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spriteBatch.End();
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}
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//draw characters to obstruct the highlighted items/characters and light sprites
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//---------------------------------------------------------------------------------------------------
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SolidColorEffect.CurrentTechnique = SolidColorEffect.Techniques["SolidColor"];
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SolidColorEffect.Parameters["color"].SetValue(Color.Black.ToVector4());
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spriteBatch.Begin(SpriteSortMode.Deferred, BlendState.NonPremultiplied, effect: SolidColorEffect, transformMatrix: spriteBatchTransform);
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foreach (Character character in Character.CharacterList)
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{
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if (character.CurrentHull == null || !character.Enabled) continue;
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if (Character.Controlled?.FocusedCharacter == character) continue;
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foreach (Limb limb in character.AnimController.Limbs)
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{
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if (limb.DeformSprite != null) continue;
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limb.Draw(spriteBatch, cam, Color.Black);
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}
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}
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spriteBatch.End();
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DeformableSprite.Effect.CurrentTechnique = DeformableSprite.Effect.Techniques["DeformShaderSolidColor"];
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DeformableSprite.Effect.Parameters["solidColor"].SetValue(Color.Black.ToVector4());
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DeformableSprite.Effect.CurrentTechnique.Passes[0].Apply();
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spriteBatch.Begin(SpriteSortMode.Deferred, BlendState.NonPremultiplied, transformMatrix: spriteBatchTransform);
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foreach (Character character in Character.CharacterList)
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{
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if (character.CurrentHull == null || !character.Enabled) continue;
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if (Character.Controlled?.FocusedCharacter == character) continue;
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foreach (Limb limb in character.AnimController.Limbs)
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{
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if (limb.DeformSprite == null) continue;
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limb.Draw(spriteBatch, cam, Color.Black);
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}
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}
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spriteBatch.End();
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DeformableSprite.Effect.CurrentTechnique = DeformableSprite.Effect.Techniques["DeformShader"];
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graphics.BlendState = BlendState.Additive;
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//draw the actual light volumes, additive particles, hull ambient lights and the halo around the player
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//---------------------------------------------------------------------------------------------------
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spriteBatch.Begin(SpriteSortMode.Deferred, BlendState.Additive, transformMatrix: spriteBatchTransform);
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GUI.DrawRectangle(spriteBatch, new Rectangle(cam.WorldView.X, -cam.WorldView.Y, cam.WorldView.Width, cam.WorldView.Height), AmbientLight, isFilled: true);
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spriteBatch.Draw(LimbLightMap, new Rectangle(cam.WorldView.X, -cam.WorldView.Y, cam.WorldView.Width, cam.WorldView.Height), Color.White);
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foreach (ElectricalDischarger discharger in ElectricalDischarger.List)
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{
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discharger.DrawElectricity(spriteBatch);
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}
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foreach (LightSource light in activeLights)
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{
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if (light.IsBackground) { continue; }
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if (light.Color.A > 0 && light.Range > 0.0f) { light.DrawLightVolume(spriteBatch, lightEffect, transform); }
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}
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lightEffect.World = transform;
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GameMain.ParticleManager.Draw(spriteBatch, false, null, Particles.ParticleBlendState.Additive);
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if (UseHullSpecificAmbientLight)
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{
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if (visibleHulls == null)
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{
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visibleHulls = GetVisibleHulls(cam);
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}
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foreach (Hull hull in smoothedHullAmbientLights.Keys)
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{
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if (smoothedHullAmbientLights[hull].A < 0.01f) continue;
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if (!visibleHulls.TryGetValue(hull, out Rectangle drawRect)) continue;
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GUI.DrawRectangle(spriteBatch,
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new Vector2(drawRect.X, -drawRect.Y),
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new Vector2(hull.Rect.Width, hull.Rect.Height),
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smoothedHullAmbientLights[hull], true);
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}
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}
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if (Character.Controlled != null)
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{
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Vector2 haloDrawPos = Character.Controlled.DrawPosition;
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haloDrawPos.Y = -haloDrawPos.Y;
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//ambient light decreases the brightness of the halo (no need for a bright halo if the ambient light is bright enough)
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float ambientBrightness = (AmbientLight.R + AmbientLight.B + AmbientLight.G) / 255.0f / 3.0f;
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Color haloColor = Color.White.Multiply(0.3f - ambientBrightness);
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if (haloColor.A > 0)
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{
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float scale = 512.0f / LightSource.LightTexture.Width;
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spriteBatch.Draw(
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LightSource.LightTexture, haloDrawPos, null, haloColor, 0.0f,
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new Vector2(LightSource.LightTexture.Width, LightSource.LightTexture.Height) / 2, scale, SpriteEffects.None, 0.0f);
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}
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}
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spriteBatch.End();
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//draw the actual light volumes, additive particles, hull ambient lights and the halo around the player
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//---------------------------------------------------------------------------------------------------
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graphics.SetRenderTarget(null);
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graphics.BlendState = BlendState.NonPremultiplied;
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}
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private readonly List<Entity> highlightedEntities = new List<Entity>();
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private bool UpdateHighlights(GraphicsDevice graphics, SpriteBatch spriteBatch, Matrix spriteBatchTransform, Camera cam)
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{
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if (GUI.DisableItemHighlights) { return false; }
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highlightedEntities.Clear();
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if (Character.Controlled != null)
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{
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if (Character.Controlled.FocusedItem != null)
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{
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highlightedEntities.Add(Character.Controlled.FocusedItem);
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}
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if (Character.Controlled.FocusedCharacter != null)
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{
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highlightedEntities.Add(Character.Controlled.FocusedCharacter);
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}
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foreach (Item item in Item.ItemList)
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{
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if (item.IsHighlighted && !highlightedEntities.Contains(item))
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{
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highlightedEntities.Add(item);
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}
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}
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}
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if (highlightedEntities.Count == 0) { return false; }
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//draw characters in light blue first
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graphics.SetRenderTarget(HighlightMap);
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SolidColorEffect.CurrentTechnique = SolidColorEffect.Techniques["SolidColor"];
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SolidColorEffect.Parameters["color"].SetValue(Color.LightBlue.ToVector4());
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SolidColorEffect.CurrentTechnique.Passes[0].Apply();
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DeformableSprite.Effect.CurrentTechnique = DeformableSprite.Effect.Techniques["DeformShaderSolidColor"];
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DeformableSprite.Effect.Parameters["solidColor"].SetValue(Color.LightBlue.ToVector4());
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DeformableSprite.Effect.CurrentTechnique.Passes[0].Apply();
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spriteBatch.Begin(SpriteSortMode.Deferred, BlendState.Additive, samplerState: SamplerState.LinearWrap, effect: SolidColorEffect, transformMatrix: spriteBatchTransform);
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foreach (Entity highlighted in highlightedEntities)
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{
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if (highlighted is Item item)
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{
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item.Draw(spriteBatch, false, true);
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}
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else if (highlighted is Character character)
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{
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character.Draw(spriteBatch, cam);
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}
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}
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spriteBatch.End();
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//draw characters in black with a bit of blur, leaving the white edges visible
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float phase = (float)(Math.Sin(Timing.TotalTime * 3.0f) + 1.0f) / 2.0f; //phase oscillates between 0 and 1
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Vector4 overlayColor = Color.Black.ToVector4() * MathHelper.Lerp(0.5f, 0.9f, phase);
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SolidColorEffect.Parameters["color"].SetValue(overlayColor);
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SolidColorEffect.CurrentTechnique = SolidColorEffect.Techniques["SolidColorBlur"];
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SolidColorEffect.CurrentTechnique.Passes[0].Apply();
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DeformableSprite.Effect.Parameters["solidColor"].SetValue(overlayColor);
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DeformableSprite.Effect.CurrentTechnique.Passes[0].Apply();
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spriteBatch.Begin(SpriteSortMode.Immediate, BlendState.NonPremultiplied, samplerState: SamplerState.LinearWrap, effect: SolidColorEffect, transformMatrix: spriteBatchTransform);
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foreach (Entity highlighted in highlightedEntities)
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{
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if (highlighted is Item item)
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{
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|
SolidColorEffect.Parameters["blurDistance"].SetValue(0.02f);
|
|
item.Draw(spriteBatch, false, true);
|
|
}
|
|
else if (highlighted is Character character)
|
|
{
|
|
SolidColorEffect.Parameters["blurDistance"].SetValue(0.05f);
|
|
character.Draw(spriteBatch, cam);
|
|
}
|
|
}
|
|
spriteBatch.End();
|
|
|
|
//raster pattern on top of everything
|
|
spriteBatch.Begin(blendState: BlendState.NonPremultiplied, samplerState: SamplerState.LinearWrap);
|
|
spriteBatch.Draw(highlightRaster,
|
|
new Rectangle(0, 0, HighlightMap.Width, HighlightMap.Height),
|
|
new Rectangle(0, 0, (int)(HighlightMap.Width / currLightMapScale * 0.5f), (int)(HighlightMap.Height / currLightMapScale * 0.5f)),
|
|
Color.White * 0.5f);
|
|
spriteBatch.End();
|
|
|
|
DeformableSprite.Effect.CurrentTechnique = DeformableSprite.Effect.Techniques["DeformShader"];
|
|
|
|
return true;
|
|
}
|
|
|
|
private Dictionary<Hull, Rectangle> GetVisibleHulls(Camera cam)
|
|
{
|
|
Dictionary<Hull, Rectangle> visibleHulls = new Dictionary<Hull, Rectangle>();
|
|
foreach (Hull hull in Hull.hullList)
|
|
{
|
|
var drawRect =
|
|
hull.Submarine == null ?
|
|
hull.Rect :
|
|
new Rectangle((int)(hull.Submarine.DrawPosition.X + hull.Rect.X), (int)(hull.Submarine.DrawPosition.Y + hull.Rect.Y), hull.Rect.Width, hull.Rect.Height);
|
|
|
|
if (drawRect.Right < cam.WorldView.X || drawRect.X > cam.WorldView.Right ||
|
|
drawRect.Y - drawRect.Height > cam.WorldView.Y || drawRect.Y < cam.WorldView.Y - cam.WorldView.Height)
|
|
{
|
|
continue;
|
|
}
|
|
visibleHulls.Add(hull, drawRect);
|
|
}
|
|
return visibleHulls;
|
|
}
|
|
|
|
public void UpdateObstructVision(GraphicsDevice graphics, SpriteBatch spriteBatch, Camera cam, Vector2 lookAtPosition)
|
|
{
|
|
if ((!LosEnabled || LosMode == LosMode.None) && !ObstructVision) return;
|
|
if (ViewTarget == null) return;
|
|
|
|
graphics.SetRenderTarget(LosTexture);
|
|
|
|
spriteBatch.Begin(SpriteSortMode.Deferred, transformMatrix: cam.Transform * Matrix.CreateScale(new Vector3(GameMain.Config.LightMapScale, GameMain.Config.LightMapScale, 1.0f)));
|
|
if (ObstructVision)
|
|
{
|
|
graphics.Clear(Color.Black);
|
|
Vector2 diff = lookAtPosition - ViewTarget.WorldPosition;
|
|
diff.Y = -diff.Y;
|
|
float rotation = MathUtils.VectorToAngle(diff);
|
|
|
|
Vector2 scale = new Vector2(
|
|
MathHelper.Clamp(diff.Length() / 256.0f, 2.0f, 5.0f), 2.0f);
|
|
|
|
spriteBatch.Draw(visionCircle, new Vector2(ViewTarget.WorldPosition.X, -ViewTarget.WorldPosition.Y), null, Color.White, rotation,
|
|
new Vector2(visionCircle.Width * 0.2f, visionCircle.Height / 2), scale, SpriteEffects.None, 0.0f);
|
|
}
|
|
else
|
|
{
|
|
graphics.Clear(Color.White);
|
|
}
|
|
spriteBatch.End();
|
|
|
|
|
|
//--------------------------------------
|
|
|
|
if (LosEnabled && LosMode != LosMode.None && ViewTarget != null)
|
|
{
|
|
Vector2 pos = ViewTarget.DrawPosition;
|
|
|
|
Rectangle camView = new Rectangle(cam.WorldView.X, cam.WorldView.Y - cam.WorldView.Height, cam.WorldView.Width, cam.WorldView.Height);
|
|
|
|
Matrix shadowTransform = cam.ShaderTransform
|
|
* Matrix.CreateOrthographic(GameMain.GraphicsWidth, GameMain.GraphicsHeight, -1, 1) * 0.5f;
|
|
|
|
var convexHulls = ConvexHull.GetHullsInRange(ViewTarget.Position, cam.WorldView.Width*0.75f, ViewTarget.Submarine);
|
|
if (convexHulls != null)
|
|
{
|
|
List<VertexPositionColor> shadowVerts = new List<VertexPositionColor>();
|
|
List<VertexPositionTexture> penumbraVerts = new List<VertexPositionTexture>();
|
|
foreach (ConvexHull convexHull in convexHulls)
|
|
{
|
|
if (!convexHull.Enabled || !convexHull.Intersects(camView)) continue;
|
|
|
|
Vector2 relativeLightPos = pos;
|
|
if (convexHull.ParentEntity?.Submarine != null) relativeLightPos -= convexHull.ParentEntity.Submarine.Position;
|
|
|
|
convexHull.CalculateShadowVertices(relativeLightPos, true);
|
|
|
|
//convert triangle strips to a triangle list
|
|
for (int i = 0; i < convexHull.ShadowVertexCount * 2 - 2; i++)
|
|
{
|
|
if (i % 2 == 0)
|
|
{
|
|
shadowVerts.Add(convexHull.ShadowVertices[i]);
|
|
shadowVerts.Add(convexHull.ShadowVertices[i + 1]);
|
|
shadowVerts.Add(convexHull.ShadowVertices[i + 2]);
|
|
}
|
|
else
|
|
{
|
|
shadowVerts.Add(convexHull.ShadowVertices[i]);
|
|
shadowVerts.Add(convexHull.ShadowVertices[i + 2]);
|
|
shadowVerts.Add(convexHull.ShadowVertices[i + 1]);
|
|
}
|
|
}
|
|
|
|
penumbraVerts.AddRange(convexHull.PenumbraVertices);
|
|
}
|
|
|
|
if (shadowVerts.Count > 0)
|
|
{
|
|
ConvexHull.shadowEffect.World = shadowTransform;
|
|
ConvexHull.shadowEffect.CurrentTechnique.Passes[0].Apply();
|
|
graphics.DrawUserPrimitives(PrimitiveType.TriangleList, shadowVerts.ToArray(), 0, shadowVerts.Count / 3, VertexPositionColor.VertexDeclaration);
|
|
|
|
if (penumbraVerts.Count > 0)
|
|
{
|
|
ConvexHull.penumbraEffect.World = shadowTransform;
|
|
ConvexHull.penumbraEffect.CurrentTechnique.Passes[0].Apply();
|
|
graphics.DrawUserPrimitives(PrimitiveType.TriangleList, penumbraVerts.ToArray(), 0, penumbraVerts.Count / 3, VertexPositionTexture.VertexDeclaration);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
graphics.SetRenderTarget(null);
|
|
}
|
|
|
|
|
|
private void CalculateAmbientLights()
|
|
{
|
|
hullAmbientLights.Clear();
|
|
|
|
foreach (LightSource light in lights)
|
|
{
|
|
if (light.Color.A < 1f || light.Range < 1.0f || light.IsBackground) continue;
|
|
|
|
var newAmbientLights = AmbientLightHulls(light);
|
|
foreach (Hull hull in newAmbientLights.Keys)
|
|
{
|
|
if (hullAmbientLights.ContainsKey(hull))
|
|
{
|
|
//hull already lit by some other light source -> add the ambient lights up
|
|
hullAmbientLights[hull] = new Color(
|
|
hullAmbientLights[hull].R + newAmbientLights[hull].R,
|
|
hullAmbientLights[hull].G + newAmbientLights[hull].G,
|
|
hullAmbientLights[hull].B + newAmbientLights[hull].B,
|
|
hullAmbientLights[hull].A + newAmbientLights[hull].A);
|
|
}
|
|
else
|
|
{
|
|
hullAmbientLights.Add(hull, newAmbientLights[hull]);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Add ambient light to the hull the lightsource is inside + all adjacent hulls connected by a gap
|
|
/// </summary>
|
|
private Dictionary<Hull, Color> AmbientLightHulls(LightSource light)
|
|
{
|
|
Dictionary<Hull, Color> hullAmbientLight = new Dictionary<Hull, Color>();
|
|
|
|
var hull = Hull.FindHull(light.WorldPosition);
|
|
if (hull == null) return hullAmbientLight;
|
|
|
|
return AmbientLightHulls(hull, hullAmbientLight, light.Color * Math.Min(light.Range / 1000.0f, 1.0f));
|
|
}
|
|
|
|
/// <summary>
|
|
/// A flood fill algorithm that adds ambient light to all hulls the starting hull is connected to
|
|
/// </summary>
|
|
private Dictionary<Hull, Color> AmbientLightHulls(Hull hull, Dictionary<Hull, Color> hullAmbientLight, Color currColor)
|
|
{
|
|
if (hullAmbientLight.ContainsKey(hull))
|
|
{
|
|
if (hullAmbientLight[hull].A > currColor.A)
|
|
return hullAmbientLight;
|
|
else
|
|
hullAmbientLight[hull] = currColor;
|
|
}
|
|
else
|
|
{
|
|
hullAmbientLight.Add(hull, currColor);
|
|
}
|
|
|
|
Color nextHullLight = currColor * AmbientLightFalloff;
|
|
//light getting too dark to notice -> no need to spread further
|
|
if (nextHullLight.A < 20) return hullAmbientLight;
|
|
|
|
//use hashset to make sure that each hull is only included once
|
|
HashSet<Hull> hulls = new HashSet<Hull>();
|
|
foreach (Gap g in hull.ConnectedGaps)
|
|
{
|
|
if (!g.IsRoomToRoom || !g.PassAmbientLight || g.Open < 0.5f) continue;
|
|
|
|
hulls.Add((g.linkedTo[0] == hull ? g.linkedTo[1] : g.linkedTo[0]) as Hull);
|
|
}
|
|
|
|
foreach (Hull h in hulls)
|
|
{
|
|
hullAmbientLight = AmbientLightHulls(h, hullAmbientLight, nextHullLight);
|
|
}
|
|
|
|
return hullAmbientLight;
|
|
}
|
|
|
|
public void ClearLights()
|
|
{
|
|
lights.Clear();
|
|
}
|
|
}
|
|
|
|
|
|
class CustomBlendStates
|
|
{
|
|
static CustomBlendStates()
|
|
{
|
|
Multiplicative = new BlendState
|
|
{
|
|
ColorSourceBlend = Blend.DestinationColor,
|
|
ColorDestinationBlend = Blend.SourceColor,
|
|
ColorBlendFunction = BlendFunction.Add
|
|
};
|
|
}
|
|
public static BlendState Multiplicative { get; private set; }
|
|
}
|
|
|
|
}
|