public static RealColor ComputeLightingEstimate(CompressedPhoton[] photons, RadiosityMaterial material, Vector3 surfaceNormal)
{
RealColor estimate = RealColor.Black.Copy();
for (int p = 0; p < photons.Length; p++)
{
float dotP = (surfaceNormal != Vector3.Empty) ? Vector3.Dot(surfaceNormal, photons[p].Direction) : 0.5f;
if (dotP < 0)
{
continue;
}
estimate.Add(photons[p].Power.Copy().Multiply(dotP));
}
estimate.Multiply((float)RadiosityHelper.RadiosityDiffuseConstant);
estimate.Multiply(material.AmbientLight);
return(estimate);
}
private void CreateLightmap(float dist2, Vector3 badPoint, string path, int texIndex, float hemisphereSizeDivisor, TextureMap texMap, ref float maxIntensity)
{
int gatherCount = 100;
int width = (int)(texMap.Width); // * RadiosityHelper.LightmapScale);
int height = (int)(texMap.Height); // * RadiosityHelper.LightmapScale);
float heightF = (float)texMap.Height; // *RadiosityHelper.LightmapScale;
float widthF = (float)texMap.Width; // *RadiosityHelper.LightmapScale;
float currentMaxIntensity = float.MinValue;
float diffuse = (float)RadiosityHelper.RadiosityDiffuseConstant;
widthF -= 1f;
heightF -= 1f;
SetOperation("Creating texture #" + (texIndex + 1));
//List<CompressedPhoton> photons;
Bitmap bitm = new Bitmap(width, height, PixelFormat.Format32bppRgb);
RadiosityMaterial mat; Vector3 norm;
for (int x = 0; x < width; x++)
{
for (int y = 0; y < heightF; y++)
{
bitm.SetPixel(x, y, m_bsp[0].ConvertUVTo3D(x, y, texIndex, 1, out mat, out norm) != Vector3.Empty ? new RealColor(1, 1, 1).ToARGB() : RealColor.Black.ToARGB());
}
}
bitm.Save("k:\\convmap_" + texIndex + "_" + 1);
//CreateLightmapWork(dist2, ref badPoint, texIndex, hemisphereSizeDivisor, texMap, width, height, heightF, widthF, ref currentMaxIntensity);
// We are going to cycle through the materials of the bsp.
EnhancedMesh[] meshes = m_bsp[0].GetMeshes(texIndex);
for (int m = 0; m < meshes.Length; m++)
{
EnhancedMesh material = meshes[m];
int faceCount = material.Indices.Length;
RectangleBounds <float> bounds = new RectangleBounds <float>(material.Vertices[0].u2, material.Vertices[0].v2);
// First we're going to figure out a rectangle for this material.
for (int v = 0; v < material.Vertices.Length; v++)
{
bounds.Update(material.Vertices[v].u2, material.Vertices[v].v2);
}
int x = (int)Math.Floor((widthF * bounds.left));
int startX = x;
int endX = (int)Math.Ceiling(widthF * bounds.right);
int y = (int)Math.Floor(heightF * bounds.top);
int endY = (int)Math.Ceiling(heightF * bounds.bottom);
//System.Diagnostics.Debugger.Break();
for (; y <= endY; y++)
{
x = startX;
for (; x <= endX; x++)
{
RadiosityMaterial illMaterial;
Vector3 faceNormal;
//if (y == 81)
// // if (x == 2)
//System.Diagnostics.Debugger.Break();
Vector3 worldPoint = m_bsp[0].ConvertUVTo3D(x, y, texIndex, m, out illMaterial, out faceNormal);
//AddDebugRay(worldPoint, faceNormal);
if (worldPoint != Vector3.Empty)
{
AddDebugPoint(worldPoint, RadiosityDebugPointListID.EstimateLocations);
var photons = photonMap.RetrieveNearestNeighbors((PhotonVector3)worldPoint, dist2, gatherCount, faceNormal);
RealColor estimate = RealColor.Black;
if (photons.Count > 0)
{
for (int p = 0; p < photons.Count; p++)
{
if (photons.list[p].photonPtr == null)
{
continue;
}
float dotP = Vector3.Dot(photons.list[p].photonPtr.Direction, faceNormal);
if (dotP < 0)
{
dotP *= -1;
//AddDebugPoint(photons.list[p].photonPtr
//AddDebugRay(photons.list[p].photonPtr.position.ToVector3(), photons.list[p].photonPtr.Direction);
}
estimate.Add(photons.list[p].photonPtr.Power.Copy().Multiply(dotP));
}
estimate.Multiply(diffuse);
estimate.Multiply(hemisphereSizeDivisor);
estimate.Multiply(illMaterial.AmbientLight);
//estimate.Multiply(1f / photons.Count);
if (RadiosityHelper.DoDistantLights)
{
if (illMaterial.DistantLightCount > 1)
{
estimate.LambertianShade(faceNormal, illMaterial.DistantLight2Color, illMaterial.DistantLight2Direction, illMaterial.AmbientLight);
estimate.LambertianShade(faceNormal, illMaterial.DistantLight1Color, illMaterial.DistantLight1Direction, illMaterial.AmbientLight);
}
else if (illMaterial.DistantLightCount > 0)
{
estimate.LambertianShade(faceNormal, illMaterial.DistantLight1Color, illMaterial.DistantLight1Direction, illMaterial.AmbientLight);
}
}
texMap.SetPixel(x, y, estimate);
}
else
{
texMap.SetPixel(x, y, new RealColor(Color.Pink));
}
}
//else continue; // if there is no normal, the estimate is useless.
}
}
}
if (currentMaxIntensity > maxIntensity)
{
maxIntensity = currentMaxIntensity;
}
texMap.SaveHDR(path + "lightmap_" + texIndex + ".hdr");
bitm = texMap.Filter(new LinearToneMapper(), false);
bitm.Save(path + "lightmap_" + texIndex + ".bmp");
}
private void CreateRender()
{
int screenWidth = MdxRender.Device.Viewport.Width;
int screenHeight = MdxRender.Device.Viewport.Height;
float dist2 = RadiosityHelper.GatherDistance * RadiosityHelper.GatherDistance;
Bitmap renderBitm;// = new Bitmap(screenWidth, screenHeight);
float[,,] hdr = new float[screenWidth, screenHeight, 3];
ChangeStage(RadiosityStage.TextureGeneration, screenWidth * screenHeight);
SetOperation("Rendering...");
int tenPercent = screenWidth / 10;
int left = screenWidth / 2 - tenPercent;
int right = screenWidth / 2 + tenPercent;
for (int y = 0; y < screenHeight; y++)
{
for (int x = 0; x < screenWidth; x++)
{
Vector3 direction, origin;
MdxRender.CalculatePickRayWorld(x, y, out direction, out origin);
//AddDebugRay(origin, direction);
RadiosityIntersection intersect = m_bsp[0].RadiosityIntersect(origin, direction);
//AddDebugPoint(intersect.Position);
if (!intersect.NoIntersection)
{
Vector3 normal = m_bsp[0].GetFaceNormal(intersect.LightmapIndex, intersect.MaterialIndex, intersect.FaceIndex);
List <CompressedPhoton> photons = photonMap.RetrieveNearestNeighbors((PhotonVector3)intersect.Position, dist2, 10000);
RealColor sum = RealColor.Black.Copy();//new RealColor(photons.Count, photons.Count, photons.Count);
if (photons.Count == 0)
{
System.Diagnostics.Debugger.Break();
}
foreach (CompressedPhoton phot in photons)
{
float dotP = Vector3.Dot(-phot.Direction, normal);
if (dotP < 0)
{
dotP = 0;
}
sum.Add(phot.Power.Copy().Multiply(dotP));
}
if ((sum.G > sum.B) && (sum.G > sum.R))
{
if (x >= left)
{
if (x <= right)
{
if (photons.Count > 100)
{
AddDebugRay(origin, direction);
AddDebugPoint(origin);
foreach (var photon in photons)
{
AddDebugPoint(photon.position.ToVector3());
}
}
}
}
//System.Diagnostics.Debugger.Break();
}
//sum.Multiply(1 / (dist2 * (float)Math.PI));
//sum.Multiply(intersect.Material.AmbientLight);
for (int c = 0; c < 3; c++)
{
hdr[x, y, c] = sum[c];
}
}
else
{
hdr[x, y, 0] = 0;
hdr[x, y, 1] = 0;
hdr[x, y, 2] = 0;
}
IncrementProgress();
}
}
//renderBitm = LinearTonemap(hdr);
Bitmap tempBitmap = new Bitmap(screenWidth, screenHeight);
//Graphics g = Graphics.FromImage(tempBitmap);
//g.DrawImage(renderBitm, 0, 0);
//g.Dispose();
//renderBitm.Dispose();
tempBitmap.Save(@"C:\Users\David\render.bmp");
return;
}
