public override void LoadContent () {
LightmapMaterials = new DefaultMaterialSet(Game.Services);
// Since the spiral is very detailed
LightingEnvironment.DefaultSubdivision = 128f;
Environment = new LightingEnvironment();
Renderer = new LightingRenderer(Game.Content, Game.RenderCoordinator, LightmapMaterials, Environment);
var light = new LightSource {
Position = new Vector2(64, 64),
Color = new Vector4(1f, 1f, 1f, 1),
RampStart = 50,
RampEnd = 275,
};
Lights.Add(light);
Environment.LightSources.Add(light);
var rng = new Random(1234);
for (var i = 0; i < 25; i++) {
light = new LightSource {
Position = new Vector2(64, 64),
Color = new Vector4((float)rng.NextDouble(0.1f, 1.0f), (float)rng.NextDouble(0.1f, 1.0f), (float)rng.NextDouble(0.1f, 1.0f), 1.0f),
RampStart = rng.NextFloat(24, 40),
RampEnd = rng.NextFloat(140, 160),
RampMode = LightSourceRampMode.Exponential
};
Lights.Add(light);
Environment.LightSources.Add(light);
}
const int spiralCount = 1800;
float spiralRadius = 0, spiralRadiusStep = 330f / spiralCount;
float spiralAngle = 0, spiralAngleStep = (float)(Math.PI / (spiralCount / 36f));
Vector2 previous = default(Vector2);
for (int i = 0; i < spiralCount; i++, spiralAngle += spiralAngleStep, spiralRadius += spiralRadiusStep) {
var current = new Vector2(
(float)(Math.Cos(spiralAngle) * spiralRadius) + (Width / 2f),
(float)(Math.Sin(spiralAngle) * spiralRadius) + (Height / 2f)
);
if (i > 0) {
Environment.Obstructions.Add(new LightObstructionLine(
previous, current
));
}
previous = current;
}
}
private void AddTorch (float x, float y) {
var torch = new LightSource {
Mode = LightSourceMode.Alpha,
Position = new Vector2(x, y),
Color = new Vector4(235 / 255.0f, 95 / 255.0f, 15 / 255f, 0.9f),
RampStart = 80,
RampEnd = 250
};
Torches.Add(torch);
ForegroundEnvironment.LightSources.Add(torch);
}
private void AddAmbientLight (float x, float y, Bounds? clipBounds = null) {
var ambient = new LightSource {
Mode = LightSourceMode.Max,
Position = new Vector2(x, y),
NeutralColor = new Vector4(32 / 255f, 32 / 255f, 32 / 255f, 1f),
Color = new Vector4(1, 1, 1, 0.45f),
RampStart = 2000,
RampEnd = 2500,
ClipRegion = clipBounds
};
BackgroundEnvironment.LightSources.Add(ambient);
}
protected void UpdateSectorLight (ParticleSystem<Spark>.ParticleCollection particles, LightSource lightSource) {
int particleCount = 0;
int rAccumulator = 0, gAccumulator = 0, bAccumulator = 0, aAccumulator = 0;
Vector2 positionAccumulator = Vector2.Zero;
Spark particle;
using (var e = particles.GetEnumerator())
while (e.GetNext(out particle)) {
particleCount += 1;
positionAccumulator += particle.Position;
var particleColor = particle.GetColor();
rAccumulator += particleColor.R;
gAccumulator += particleColor.G;
bAccumulator += particleColor.B;
aAccumulator += particleColor.A;
}
lightSource.Position = (positionAccumulator / particleCount);
float fParticleCount255 = particleCount * 255.0f;
// FIXME: Need to unpremultiply
lightSource.Color = new Vector4(
rAccumulator / fParticleCount255,
gAccumulator / fParticleCount255,
bAccumulator / fParticleCount255,
aAccumulator / fParticleCount255
);
lightSource.Color.W *= MathHelper.Clamp(particleCount / 20f, 0.1f, 1.0f) * 0.55f;
lightSource.RampStart = 24 + MathHelper.Clamp(particleCount * 0.25f, 0, 24);
lightSource.RampEnd = lightSource.RampStart + 32 + MathHelper.Clamp(particleCount * 0.5f, 0, 48);
lightSource.RampMode = LightSourceRampMode.Exponential;
}
