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Hull-specific ambient lighting: light sources increase the amount of ambient light in rooms and the light can spread to adjacent rooms through gaps. Allows making the default ambient light much darker without making shadows look too dark in fully lit subs.

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This commit is contained in:
Regalis
2016-10-10 21:13:22 +03:00
parent 14447062a9
commit d8476d9371
10 changed files with 198 additions and 35 deletions
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Subsurface/Source/Map/Lights/LightManager.cs
+152 -16
View File
@@ -8,7 +8,9 @@ namespace Barotrauma.Lights
{
class LightManager
{
//public static Vector2 ViewPos;
private const float AmbientLightUpdateInterval = 0.2f;
private const float AmbientLightFalloff = 0.8f;
private static Entity viewTarget;
public static Entity ViewTarget
@@ -35,12 +37,17 @@ namespace Barotrauma.Lights
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(60, 60, 60, 255);
AmbientLight = new Color(20, 20, 20, 255);
visionCircle = Sprite.LoadTexture("Content/Lights/visioncircle.png");
@@ -53,7 +60,10 @@ namespace Barotrauma.Lights
losTexture = new RenderTarget2D(graphics, GameMain.GraphicsWidth, GameMain.GraphicsHeight);
if (alphaClearTexture==null)
hullAmbientLights = new Dictionary<Hull, Color>();
smoothedHullAmbientLights = new Dictionary<Hull, Color>();
if (alphaClearTexture == null)
{
alphaClearTexture = TextureLoader.FromFile("Content/Lights/alphaOne.png");
}
@@ -77,7 +87,38 @@ namespace Barotrauma.Lights
}
}
public void UpdateLightMap(GraphicsDevice graphics, SpriteBatch spriteBatch, Camera cam)
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;
@@ -94,7 +135,7 @@ namespace Barotrauma.Lights
foreach (LightSource light in lights)
{
if (light.Color.A < 0.01f || light.Range < 1.0f || !light.CastShadows) continue;
if (light.Color.A < 1 || light.Range < 1.0f || !light.CastShadows) continue;
if (!MathUtils.CircleIntersectsRectangle(light.WorldPosition, light.Range, viewRect)) continue;
//clear alpha to 1
@@ -117,8 +158,7 @@ namespace Barotrauma.Lights
ClearAlphaToOne(graphics, spriteBatch);
spriteBatch.Begin(SpriteSortMode.Deferred, CustomBlendStates.MultiplyWithAlpha, null, null, null, null, cam.Transform);
GameMain.ParticleManager.Draw(spriteBatch, false, Particles.ParticleBlendState.Additive);
@@ -126,7 +166,7 @@ namespace Barotrauma.Lights
foreach (LightSource light in lights)
{
if (light.Color.A < 0.01f || light.Range < 1.0f || light.CastShadows) continue;
if (light.Color.A < 1 || light.Range < 1.0f || light.CastShadows) continue;
//if (!MathUtils.CircleIntersectsRectangle(light.WorldPosition, light.Range, viewRect)) continue;
light.Draw(spriteBatch);
@@ -147,6 +187,27 @@ namespace Barotrauma.Lights
}
spriteBatch.End();
spriteBatch.Begin(SpriteSortMode.Deferred, BlendState.Additive, null, null, null, null, cam.Transform);
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);
@@ -173,8 +234,6 @@ namespace Barotrauma.Lights
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
{
@@ -209,6 +268,86 @@ namespace Barotrauma.Lights
}
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);
}
foreach (Gap g in hull.ConnectedGaps)
{
for (int i = 0; i < g.linkedTo.Count;i++ )
{
if (g.linkedTo[i] is Hull)
{
if (g.linkedTo[i] == hull) continue;
Color nextHullLight = currColor * AmbientLightFalloff;
if (!g.PassAmbientLight) nextHullLight *= g.Open;
if (nextHullLight.A < 10) continue;
hullAmbientLight = AmbientLightHulls((Hull)g.linkedTo[i], hullAmbientLight, nextHullLight);
}
}
}
return hullAmbientLight;
}
private void ClearAlphaToOne(GraphicsDevice graphics, SpriteBatch spriteBatch)
{
@@ -217,7 +356,7 @@ namespace Barotrauma.Lights
spriteBatch.End();
}
public void DrawLightMap(SpriteBatch spriteBatch, Camera cam, Effect effect)
public void DrawLightMap(SpriteBatch spriteBatch, Effect effect)
{
if (!LightingEnabled) return;
@@ -227,11 +366,11 @@ namespace Barotrauma.Lights
spriteBatch.End();
}
public void DrawLOS(GraphicsDevice graphics, SpriteBatch spriteBatch, Camera cam, Effect effect)
public void DrawLOS(SpriteBatch spriteBatch, Effect effect)
{
if (!LosEnabled || ViewTarget == null) return;
spriteBatch.Begin(SpriteSortMode.Deferred, CustomBlendStates.Multiplicative, null, null, null);
spriteBatch.Begin(SpriteSortMode.Deferred, CustomBlendStates.Multiplicative, null, null, null, effect);
spriteBatch.Draw(losTexture, Vector2.Zero, Color.White);
spriteBatch.End();
@@ -264,9 +403,6 @@ namespace Barotrauma.Lights
public static BlendState Multiplicative { get; private set; }
public static BlendState WriteToAlpha { get; private set; }
public static BlendState MultiplyWithAlpha { get; private set; }
}
}
Subsurface/Source/Map/Lights/LightSource.cs
+6 -5
View File
@@ -306,20 +306,21 @@ namespace Barotrauma.Lights
Vector2 center = new Vector2(LightTexture.Width / 2, LightTexture.Height / 2);
float scale = range / (lightTexture.Width / 2.0f);
spriteBatch.Draw(lightTexture, new Vector2(WorldPosition.X, -WorldPosition.Y), null, color, 0, center, scale, SpriteEffects.None, 1);
spriteBatch.Draw(lightTexture, new Vector2(WorldPosition.X, -WorldPosition.Y), null, color * (color.A / 255.0f), 0, center, scale, SpriteEffects.None, 1);
}
else
{
overrideLightTexture.Draw(spriteBatch,
new Vector2(WorldPosition.X, -WorldPosition.Y), Color,
overrideLightTexture.Origin, -Rotation,
new Vector2(overrideLightTexture.size.X/overrideLightTexture.SourceRect.Width, overrideLightTexture.size.Y/overrideLightTexture.SourceRect.Height));
overrideLightTexture.Draw(spriteBatch,
new Vector2(WorldPosition.X, -WorldPosition.Y), color * (color.A / 255.0f),
overrideLightTexture.Origin, -Rotation,
new Vector2(overrideLightTexture.size.X / overrideLightTexture.SourceRect.Width, overrideLightTexture.size.Y / overrideLightTexture.SourceRect.Height));
}
}
if (LightSprite != null)
{
LightSprite.Draw(spriteBatch, new Vector2(WorldPosition.X, -WorldPosition.Y), Color, LightSprite.Origin);
}
}