private static void gatherPhotons(List <LightMap> maps, PhotonPartitioner photonMap, TrianglePartitioner scene, List <Light> lights)
{
int numPatches = 0;
foreach (LightMap l in maps)
{
numPatches += l.patches.Count;
}
Settings.stream.SetProgressBarMaximum(numPatches);
ParallelOptions opts = new ParallelOptions();
opts.MaxDegreeOfParallelism = Settings.maxThreads;
foreach (LightMap l in maps)
{
Parallel.ForEach(l.patches, opts, delegate(Patch p, ParallelLoopState state)
{
if (abort)
{
state.Stop();
}
List <Photon> gather = photonMap.nearest(Settings.neighbourCount, p.position);
foreach (Photon photon in gather)
{
Triangle throwAway;
if (scene.intersection(photon.position, p.position - photon.position, out throwAway) < 1.0f)
{
p.absorbPhoton(photon);
}
}
foreach (Light light in lights)
{
if (!light.shootsPhotons)
{
p.ambientLight += light.influence((p.position - light.position).Length) * light.colour;
}
}
//p.incidentLight *= 100;
Settings.stream.UpdateProgress();
});
if (abort)
{
throw new LightmappingAbortedException("Aborted lightmapping while gathering photons.");
}
}
}
private static void calculateAmbientOcclusion(List <LightMap> maps, TrianglePartitioner scene)
{
int numPatches = 0;
foreach (LightMap l in maps)
{
numPatches += l.patches.Count;
}
Settings.stream.SetProgressBarMaximum(numPatches);
ParallelOptions opts = new ParallelOptions();
opts.MaxDegreeOfParallelism = Settings.maxThreads;
Random generator = new Random();
foreach (LightMap l in maps)
{
Parallel.ForEach(l.patches, opts, delegate(Patch p, ParallelLoopState state)
{
if (abort)
{
state.Stop();
}
Random localGenerator;
lock (generator)
{
localGenerator = new Random(generator.Next());
}
for (int sample = 0; sample < 64 /*Settings.ambientOcclusionSamples*/; sample++)
{
double randomA = localGenerator.NextDouble();
double randomB = localGenerator.NextDouble();
//http://mathworld.wolfram.com/SpherePointPicking.html
double theta = 2 * Math.PI * randomA;
double phi = Math.Acos(2 * randomB - 1);
Vector3 randomDirection = new Vector3(Settings.ambientRayLength * (float)(Math.Cos(theta) * Math.Sin(phi)),
Settings.ambientRayLength * (float)(Math.Sin(theta) * Math.Sin(phi)),
Settings.ambientRayLength * (float)Math.Cos(phi));
if (Vector3.Dot(p.normal, randomDirection) < 0)
{
randomDirection = -randomDirection;
}
Triangle throwAway;
if (scene.intersection(p.position, randomDirection, out throwAway) > 0)
{
p.ambientOcclusion += 4;
}
}
Settings.stream.UpdateProgress();
});
if (abort)
{
throw new LightmappingAbortedException("Aborted lightmapping while gathering photons.");
}
}
}
private static List <Photon> firePhotons(List <Light> lights, TrianglePartitioner scene)
{
Random random = new Random();
int numPhotons = 0;
foreach (Light l in lights)
{
if (l.shootsPhotons)
{
numPhotons += Settings.numPhotonsPerLight;
}
}
Settings.stream.SetProgressBarMaximum(numPhotons);
ParallelOptions opts = new ParallelOptions();
opts.MaxDegreeOfParallelism = Settings.maxThreads;
List <Photon> photons = new List <Photon>();
double reflectProbability = 0.3;
/*
* foreach(Light l in lights)
* {
* if (l.shootsPhotons)
* {
* for (int i = 0; i < Settings.numPhotonsPerLight; i++)
* {
* Vector3 direction = l.generateRandomDirection();
* Triangle intersectedTriangle;
* float distance = scene.intersection(l.position, direction, out intersectedTriangle);
* if (distance > 0)
* {
* Vector3 intersection = l.position + (distance * direction);
* photons.Add(new Photon(intersection, direction, l, 1.0f));
* float totalDistance = distance;
*
* //I don't actually care if its unique between threads, threadsafty on this random number is not that big of a deal
* while (random.NextDouble() > reflectProbability)
* {
* direction = Vector3.Transform(direction * -1, Matrix4.CreateFromAxisAngle(intersectedTriangle.normal, (float)Math.PI));
* distance = scene.intersection(intersection, direction, out intersectedTriangle);
* //If we don't get a valid intersection, we are done bouncing
* if (distance <= 0) break;
*
* intersection = intersection + (distance * direction);
* totalDistance += distance;
* photons.Add(new Photon(intersection, direction, l, 1.0f));
* }
*
* }
* Settings.stream.UpdateProgress();
* }
* }
* }
* //*/
//*
Parallel.ForEach(lights, delegate(Light l, ParallelLoopState state)
{
if (l.shootsPhotons)
{
List <Photon> newPhotons = new List <Photon>();
for (int i = 0; i < Settings.numPhotonsPerLight; i++)
{
Vector3 direction = l.generateRandomDirection();
Triangle intersectedTriangle;
float distance = scene.intersection(l.position, direction, out intersectedTriangle);
if (distance > 0)
{
Vector3 intersection = l.position + (distance * direction);
newPhotons.Add(new Photon(intersection, direction, l, 1.0f));
float totalDistance = distance;
//I don't actually care if its unique between threads, threadsafty on this random number is not that big of a deal
while (random.NextDouble() > reflectProbability)
{
direction = (-2 * Vector3.Dot(direction, intersectedTriangle.normal) * intersectedTriangle.normal) + direction;
//direction = Vector3.Transform(direction * -1, Matrix4.CreateFromAxisAngle(intersectedTriangle.normal, (float)Math.PI));
distance = scene.intersection(intersection, direction, out intersectedTriangle);
//If we don't get a valid intersection, we are done bouncing
if (distance <= 0)
{
break;
}
intersection = intersection + (distance * direction);
totalDistance += distance;
newPhotons.Add(new Photon(intersection, direction, l, 1.0f));
}
}
if ((i + 1) % 20 == 0)
{
if (abort)
{
state.Stop();
return;
}
Settings.stream.UpdateProgress(20);
}
}
lock (photons)
{
photons.AddRange(newPhotons);
}
}
});
//*/
/*
* foreach(Light l in lights)
* {
* if (l.shootsPhotons)
* {
* Parallel.For(0, Settings.numPhotonsPerLight, delegate(int i, ParallelLoopState state)
* {
* if (abort)
* {
* state.Stop();
* }
* List<Photon> newPhotons = new List<Photon>();
* Vector3 direction = l.generateRandomDirection();
* Triangle intersectedTriangle;
* float distance = scene.intersection(l.position, direction, out intersectedTriangle);
* if (distance > 0)
* {
* Vector3 intersection = l.position + (distance * direction);
* newPhotons.Add(new Photon(intersection, direction, l, 1.0f));
* float totalDistance = distance;
*
* //I don't actually care if its unique between threads, threadsafty on this random number is not that big of a deal
* while (random.NextDouble() > reflectProbability)
* {
* direction = Vector3.Transform(direction * -1, Matrix4.CreateFromAxisAngle(intersectedTriangle.normal, (float)Math.PI));
* distance = scene.intersection(intersection, direction, out intersectedTriangle);
* //If we don't get a valid intersection, we are done bouncing
* if (distance <= 0) break;
*
* intersection = intersection + (distance * direction);
* totalDistance += distance;
* newPhotons.Add(new Photon(intersection, direction, l, 1.0f));
* }
*
* }
* Settings.stream.UpdateProgress();
* lock (photons)
* {
* photons.AddRange(newPhotons);
* }
* });
* }
* }
* //*/
if (abort)
{
throw new LightmappingAbortedException("Aborted lightmapping while firing photons.");
}
return(photons);
}
private static void calculateAmbientOcclusion(List<LightMap> maps, TrianglePartitioner scene)
{
int numPatches = 0;
foreach (LightMap l in maps)
{
numPatches += l.patches.Count;
}
Settings.stream.SetProgressBarMaximum(numPatches);
ParallelOptions opts = new ParallelOptions();
opts.MaxDegreeOfParallelism = Settings.maxThreads;
Random generator = new Random();
foreach (LightMap l in maps)
{
Parallel.ForEach(l.patches, opts, delegate(Patch p, ParallelLoopState state)
{
if (abort)
{
state.Stop();
}
Random localGenerator;
lock (generator)
{
localGenerator = new Random(generator.Next());
}
for (int sample = 0; sample < 64 /*Settings.ambientOcclusionSamples*/; sample++)
{
double randomA = localGenerator.NextDouble();
double randomB = localGenerator.NextDouble();
//http://mathworld.wolfram.com/SpherePointPicking.html
double theta = 2 * Math.PI * randomA;
double phi = Math.Acos(2 * randomB - 1);
Vector3 randomDirection = new Vector3(Settings.ambientRayLength * (float)(Math.Cos(theta) * Math.Sin(phi)),
Settings.ambientRayLength * (float)(Math.Sin(theta) * Math.Sin(phi)),
Settings.ambientRayLength * (float)Math.Cos(phi));
if (Vector3.Dot(p.normal, randomDirection) < 0)
{
randomDirection = -randomDirection;
}
Triangle throwAway;
if (scene.intersection(p.position, randomDirection, out throwAway) > 0)
{
p.ambientOcclusion += 4;
}
}
Settings.stream.UpdateProgress();
});
if (abort)
{
throw new LightmappingAbortedException("Aborted lightmapping while gathering photons.");
}
}
}
private static void gatherPhotons(List<LightMap> maps, PhotonPartitioner photonMap, TrianglePartitioner scene, List<Light> lights)
{
int numPatches = 0;
foreach (LightMap l in maps)
{
numPatches += l.patches.Count;
}
Settings.stream.SetProgressBarMaximum(numPatches);
ParallelOptions opts = new ParallelOptions();
opts.MaxDegreeOfParallelism = Settings.maxThreads;
foreach (LightMap l in maps)
{
Parallel.ForEach(l.patches, opts, delegate(Patch p, ParallelLoopState state)
{
if (abort)
{
state.Stop();
}
List<Photon> gather = photonMap.nearest(Settings.neighbourCount, p.position);
foreach (Photon photon in gather)
{
Triangle throwAway;
if (scene.intersection(photon.position, p.position - photon.position, out throwAway) < 1.0f)
{
p.absorbPhoton(photon);
}
}
foreach (Light light in lights)
{
if (!light.shootsPhotons)
{
p.ambientLight += light.influence((p.position - light.position).Length) * light.colour;
}
}
//p.incidentLight *= 100;
Settings.stream.UpdateProgress();
});
if (abort)
{
throw new LightmappingAbortedException("Aborted lightmapping while gathering photons.");
}
}
}
private static List<Photon> firePhotons(List<Light> lights, TrianglePartitioner scene)
{
Random random = new Random();
int numPhotons = 0;
foreach (Light l in lights)
{
if (l.shootsPhotons)
{
numPhotons += Settings.numPhotonsPerLight;
}
}
Settings.stream.SetProgressBarMaximum(numPhotons);
ParallelOptions opts = new ParallelOptions();
opts.MaxDegreeOfParallelism = Settings.maxThreads;
List<Photon> photons = new List<Photon>();
double reflectProbability = 0.3;
/*
foreach(Light l in lights)
{
if (l.shootsPhotons)
{
for (int i = 0; i < Settings.numPhotonsPerLight; i++)
{
Vector3 direction = l.generateRandomDirection();
Triangle intersectedTriangle;
float distance = scene.intersection(l.position, direction, out intersectedTriangle);
if (distance > 0)
{
Vector3 intersection = l.position + (distance * direction);
photons.Add(new Photon(intersection, direction, l, 1.0f));
float totalDistance = distance;
//I don't actually care if its unique between threads, threadsafty on this random number is not that big of a deal
while (random.NextDouble() > reflectProbability)
{
direction = Vector3.Transform(direction * -1, Matrix4.CreateFromAxisAngle(intersectedTriangle.normal, (float)Math.PI));
distance = scene.intersection(intersection, direction, out intersectedTriangle);
//If we don't get a valid intersection, we are done bouncing
if (distance <= 0) break;
intersection = intersection + (distance * direction);
totalDistance += distance;
photons.Add(new Photon(intersection, direction, l, 1.0f));
}
}
Settings.stream.UpdateProgress();
}
}
}
//*/
//*
Parallel.ForEach(lights, delegate(Light l, ParallelLoopState state)
{
if (l.shootsPhotons)
{
List<Photon> newPhotons = new List<Photon>();
for(int i = 0; i < Settings.numPhotonsPerLight; i++)
{
Vector3 direction = l.generateRandomDirection();
Triangle intersectedTriangle;
float distance = scene.intersection(l.position, direction, out intersectedTriangle);
if (distance > 0)
{
Vector3 intersection = l.position + (distance * direction);
newPhotons.Add(new Photon(intersection, direction, l, 1.0f));
float totalDistance = distance;
//I don't actually care if its unique between threads, threadsafty on this random number is not that big of a deal
while (random.NextDouble() > reflectProbability)
{
direction = (-2 * Vector3.Dot(direction, intersectedTriangle.normal) * intersectedTriangle.normal) + direction;
//direction = Vector3.Transform(direction * -1, Matrix4.CreateFromAxisAngle(intersectedTriangle.normal, (float)Math.PI));
distance = scene.intersection(intersection, direction, out intersectedTriangle);
//If we don't get a valid intersection, we are done bouncing
if (distance <= 0) break;
intersection = intersection + (distance * direction);
totalDistance += distance;
newPhotons.Add(new Photon(intersection, direction, l, 1.0f));
}
}
if ((i + 1) % 20 == 0)
{
if (abort)
{
state.Stop();
return;
}
Settings.stream.UpdateProgress(20);
}
}
lock (photons)
{
photons.AddRange(newPhotons);
}
}
});
//*/
/*
foreach(Light l in lights)
{
if (l.shootsPhotons)
{
Parallel.For(0, Settings.numPhotonsPerLight, delegate(int i, ParallelLoopState state)
{
if (abort)
{
state.Stop();
}
List<Photon> newPhotons = new List<Photon>();
Vector3 direction = l.generateRandomDirection();
Triangle intersectedTriangle;
float distance = scene.intersection(l.position, direction, out intersectedTriangle);
if (distance > 0)
{
Vector3 intersection = l.position + (distance * direction);
newPhotons.Add(new Photon(intersection, direction, l, 1.0f));
float totalDistance = distance;
//I don't actually care if its unique between threads, threadsafty on this random number is not that big of a deal
while (random.NextDouble() > reflectProbability)
{
direction = Vector3.Transform(direction * -1, Matrix4.CreateFromAxisAngle(intersectedTriangle.normal, (float)Math.PI));
distance = scene.intersection(intersection, direction, out intersectedTriangle);
//If we don't get a valid intersection, we are done bouncing
if (distance <= 0) break;
intersection = intersection + (distance * direction);
totalDistance += distance;
newPhotons.Add(new Photon(intersection, direction, l, 1.0f));
}
}
Settings.stream.UpdateProgress();
lock (photons)
{
photons.AddRange(newPhotons);
}
});
}
}
//*/
if (abort)
{
throw new LightmappingAbortedException("Aborted lightmapping while firing photons.");
}
return photons;
}