404 lines
15 KiB
C#
404 lines
15 KiB
C#
using Microsoft.Xna.Framework;
|
|
using Microsoft.Xna.Framework.Graphics;
|
|
using System.Collections.Generic;
|
|
using System.Diagnostics;
|
|
using System.Linq;
|
|
|
|
namespace Barotrauma.Lights
|
|
{
|
|
class LightManager
|
|
{
|
|
private const float AmbientLightUpdateInterval = 0.2f;
|
|
private const float AmbientLightFalloff = 0.8f;
|
|
|
|
private static Entity viewTarget;
|
|
|
|
public static Entity ViewTarget
|
|
{
|
|
get { return viewTarget; }
|
|
set {
|
|
if (viewTarget == value) return;
|
|
viewTarget = value;
|
|
}
|
|
}
|
|
|
|
public Color AmbientLight;
|
|
|
|
RenderTarget2D lightMap, losTexture;
|
|
|
|
BasicEffect lightEffect;
|
|
|
|
private static Texture2D alphaClearTexture;
|
|
|
|
private List<LightSource> lights;
|
|
|
|
public bool LosEnabled = true;
|
|
|
|
public bool LightingEnabled = true;
|
|
|
|
public bool ObstructVision;
|
|
|
|
private Texture2D visionCircle;
|
|
|
|
private Dictionary<Hull, Color> hullAmbientLights = new Dictionary<Hull, Color>();
|
|
private Dictionary<Hull, Color> smoothedHullAmbientLights = new Dictionary<Hull, Color>();
|
|
|
|
private float ambientLightUpdateTimer;
|
|
|
|
public LightManager(GraphicsDevice graphics)
|
|
{
|
|
lights = new List<LightSource>();
|
|
|
|
AmbientLight = new Color(20, 20, 20, 255);
|
|
|
|
visionCircle = Sprite.LoadTexture("Content/Lights/visioncircle.png");
|
|
|
|
var pp = graphics.PresentationParameters;
|
|
|
|
lightMap = new RenderTarget2D(graphics,
|
|
GameMain.GraphicsWidth, GameMain.GraphicsHeight, false,
|
|
pp.BackBufferFormat, pp.DepthStencilFormat, pp.MultiSampleCount,
|
|
RenderTargetUsage.DiscardContents);
|
|
|
|
losTexture = new RenderTarget2D(graphics, GameMain.GraphicsWidth, GameMain.GraphicsHeight);
|
|
|
|
if (lightEffect == null)
|
|
{
|
|
lightEffect = new BasicEffect(GameMain.Instance.GraphicsDevice);
|
|
lightEffect.VertexColorEnabled = false;
|
|
|
|
lightEffect.TextureEnabled = true;
|
|
lightEffect.Texture = LightSource.LightTexture;
|
|
}
|
|
|
|
hullAmbientLights = new Dictionary<Hull, Color>();
|
|
smoothedHullAmbientLights = new Dictionary<Hull, Color>();
|
|
|
|
if (alphaClearTexture == null)
|
|
{
|
|
alphaClearTexture = TextureLoader.FromFile("Content/Lights/alphaOne.png");
|
|
}
|
|
}
|
|
|
|
public void AddLight(LightSource light)
|
|
{
|
|
lights.Add(light);
|
|
}
|
|
|
|
public void RemoveLight(LightSource light)
|
|
{
|
|
lights.Remove(light);
|
|
}
|
|
|
|
public void OnMapLoaded()
|
|
{
|
|
foreach (LightSource light in lights)
|
|
{
|
|
light.NeedsHullCheck = true;
|
|
light.NeedsRecalculation = true;
|
|
}
|
|
}
|
|
|
|
public void Update(float deltaTime)
|
|
{
|
|
if (ambientLightUpdateTimer > 0.0f)
|
|
{
|
|
ambientLightUpdateTimer -= deltaTime;
|
|
}
|
|
else
|
|
{
|
|
CalculateAmbientLights();
|
|
|
|
ambientLightUpdateTimer = AmbientLightUpdateInterval;
|
|
}
|
|
|
|
foreach (Hull hull in hullAmbientLights.Keys)
|
|
{
|
|
if (!smoothedHullAmbientLights.ContainsKey(hull))
|
|
{
|
|
smoothedHullAmbientLights.Add(hull, Color.TransparentBlack);
|
|
}
|
|
}
|
|
|
|
foreach (Hull hull in smoothedHullAmbientLights.Keys.ToList())
|
|
{
|
|
Color targetColor = Color.TransparentBlack;
|
|
|
|
hullAmbientLights.TryGetValue(hull, out targetColor);
|
|
|
|
smoothedHullAmbientLights[hull] = Color.Lerp(smoothedHullAmbientLights[hull], targetColor, deltaTime);
|
|
}
|
|
}
|
|
|
|
public void UpdateLightMap(GraphicsDevice graphics, SpriteBatch spriteBatch, Camera cam, Effect blur)
|
|
{
|
|
if (!LightingEnabled) return;
|
|
|
|
Matrix shadowTransform = cam.ShaderTransform
|
|
* Matrix.CreateOrthographic(GameMain.GraphicsWidth, GameMain.GraphicsHeight, -1, 1) * 0.5f;
|
|
|
|
graphics.SetRenderTarget(lightMap);
|
|
|
|
Rectangle viewRect = cam.WorldView;
|
|
viewRect.Y -= cam.WorldView.Height;
|
|
|
|
//clear to some small ambient light
|
|
graphics.Clear(AmbientLight);
|
|
graphics.BlendState = BlendState.Additive;
|
|
|
|
spriteBatch.Begin(SpriteSortMode.Deferred, BlendState.Additive, null, null, null, null, cam.Transform);
|
|
|
|
Matrix transform = cam.ShaderTransform
|
|
* Matrix.CreateOrthographic(GameMain.GraphicsWidth, GameMain.GraphicsHeight, -1, 1) * 0.5f;
|
|
|
|
Vector3 offset = Vector3.Zero;// new Vector3(Submarine.MainSub.DrawPosition.X, Submarine.MainSub.DrawPosition.Y, 0.0f);
|
|
|
|
foreach (LightSource light in lights)
|
|
{
|
|
if (light.Color.A < 1 || light.Range < 1.0f || !light.CastShadows) continue;
|
|
if (!MathUtils.CircleIntersectsRectangle(light.WorldPosition, light.Range, viewRect)) continue;
|
|
|
|
light.Draw(spriteBatch, lightEffect, transform);
|
|
}
|
|
|
|
lightEffect.World = Matrix.CreateTranslation(offset) * transform;
|
|
|
|
GameMain.ParticleManager.Draw(spriteBatch, false, Particles.ParticleBlendState.Additive);
|
|
|
|
if (Character.Controlled != null)
|
|
{
|
|
if (Character.Controlled.ClosestItem != null)
|
|
{
|
|
Character.Controlled.ClosestItem.IsHighlighted = true;
|
|
Character.Controlled.ClosestItem.Draw(spriteBatch, false, true);
|
|
Character.Controlled.ClosestItem.IsHighlighted = true;
|
|
}
|
|
else if (Character.Controlled.ClosestCharacter != null)
|
|
{
|
|
Character.Controlled.ClosestCharacter.Draw(spriteBatch);
|
|
}
|
|
}
|
|
|
|
foreach (Hull hull in smoothedHullAmbientLights.Keys)
|
|
{
|
|
if (smoothedHullAmbientLights[hull].A < 0.01f) continue;
|
|
|
|
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);
|
|
|
|
GUI.DrawRectangle(spriteBatch,
|
|
new Vector2(drawRect.X, -drawRect.Y),
|
|
new Vector2(hull.Rect.Width, hull.Rect.Height),
|
|
smoothedHullAmbientLights[hull] * 0.5f, true);
|
|
}
|
|
|
|
spriteBatch.End();
|
|
|
|
//clear alpha, to avoid messing stuff up later
|
|
//ClearAlphaToOne(graphics, spriteBatch);
|
|
|
|
graphics.SetRenderTarget(null);
|
|
graphics.BlendState = BlendState.AlphaBlend;
|
|
}
|
|
|
|
public void UpdateObstructVision(GraphicsDevice graphics, SpriteBatch spriteBatch, Camera cam, Vector2 lookAtPosition)
|
|
{
|
|
if (!LosEnabled && !ObstructVision) return;
|
|
|
|
graphics.SetRenderTarget(losTexture);
|
|
|
|
spriteBatch.Begin(SpriteSortMode.Deferred, null, null, null, null, null, cam.Transform);
|
|
|
|
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(LightSource.LightTexture.Width*0.2f, LightSource.LightTexture.Height/2), scale, SpriteEffects.None, 0.0f);
|
|
}
|
|
else
|
|
{
|
|
graphics.Clear(Color.White);
|
|
}
|
|
|
|
spriteBatch.End();
|
|
|
|
//--------------------------------------
|
|
|
|
if (LosEnabled && ViewTarget != null)
|
|
{
|
|
Vector2 pos = ViewTarget.WorldPosition;
|
|
|
|
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)
|
|
{
|
|
foreach (ConvexHull convexHull in convexHulls)
|
|
{
|
|
if (!convexHull.Intersects(camView)) continue;
|
|
//if (!camView.Intersects(convexHull.BoundingBox)) continue;
|
|
|
|
convexHull.DrawShadows(graphics, cam, pos, shadowTransform);
|
|
}
|
|
}
|
|
}
|
|
graphics.SetRenderTarget(null);
|
|
}
|
|
|
|
|
|
private void CalculateAmbientLights()
|
|
{
|
|
hullAmbientLights.Clear();
|
|
|
|
foreach (LightSource light in lights)
|
|
{
|
|
if (light.Color.A < 1f || light.Range < 1.0f) 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 * (light.Range/2000.0f));
|
|
}
|
|
|
|
/// <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;
|
|
}
|
|
|
|
private void ClearAlphaToOne(GraphicsDevice graphics, SpriteBatch spriteBatch)
|
|
{
|
|
spriteBatch.Begin(SpriteSortMode.Deferred, CustomBlendStates.WriteToAlpha);
|
|
spriteBatch.Draw(alphaClearTexture, new Rectangle(0, 0,graphics.Viewport.Width, graphics.Viewport.Height), Color.White);
|
|
spriteBatch.End();
|
|
}
|
|
|
|
public void DrawLightMap(SpriteBatch spriteBatch, Effect effect)
|
|
{
|
|
if (!LightingEnabled) return;
|
|
|
|
spriteBatch.Begin(SpriteSortMode.Deferred, CustomBlendStates.Multiplicative, null, null, null, effect);
|
|
//effect.CurrentTechnique.Passes[0].Apply();
|
|
spriteBatch.Draw(lightMap, Vector2.Zero, Color.White);
|
|
spriteBatch.End();
|
|
}
|
|
|
|
public void DrawLOS(SpriteBatch spriteBatch, Effect effect,bool renderingBackground)
|
|
{
|
|
if (!LosEnabled || ViewTarget == null) return;
|
|
|
|
spriteBatch.Begin(SpriteSortMode.Deferred, renderingBackground ? CustomBlendStates.LOS : CustomBlendStates.Multiplicative, null, null, null, effect);
|
|
spriteBatch.Draw(losTexture, Vector2.Zero, Color.White);
|
|
spriteBatch.End();
|
|
|
|
if (!renderingBackground) ObstructVision = false;
|
|
}
|
|
|
|
public void ClearLights()
|
|
{
|
|
lights.Clear();
|
|
}
|
|
}
|
|
|
|
|
|
class CustomBlendStates
|
|
{
|
|
static CustomBlendStates()
|
|
{
|
|
Multiplicative = new BlendState();
|
|
Multiplicative.ColorSourceBlend = Multiplicative.AlphaSourceBlend = Blend.Zero;
|
|
Multiplicative.ColorDestinationBlend = Multiplicative.AlphaDestinationBlend = Blend.SourceColor;
|
|
Multiplicative.ColorBlendFunction = Multiplicative.AlphaBlendFunction = BlendFunction.Add;
|
|
|
|
WriteToAlpha = new BlendState();
|
|
WriteToAlpha.ColorWriteChannels = ColorWriteChannels.Alpha;
|
|
|
|
MultiplyWithAlpha = new BlendState();
|
|
MultiplyWithAlpha.ColorDestinationBlend = MultiplyWithAlpha.AlphaDestinationBlend = Blend.One;
|
|
MultiplyWithAlpha.ColorSourceBlend = MultiplyWithAlpha.AlphaSourceBlend = Blend.DestinationAlpha;
|
|
|
|
LOS = new BlendState();
|
|
LOS.ColorSourceBlend = LOS.AlphaSourceBlend = Blend.Zero;
|
|
LOS.ColorDestinationBlend = LOS.AlphaDestinationBlend = Blend.InverseSourceColor;
|
|
LOS.ColorBlendFunction = LOS.AlphaBlendFunction = BlendFunction.Add;
|
|
}
|
|
public static BlendState Multiplicative { get; private set; }
|
|
public static BlendState WriteToAlpha { get; private set; }
|
|
public static BlendState MultiplyWithAlpha { get; private set; }
|
|
public static BlendState LOS { get; private set; }
|
|
}
|
|
|
|
}
|