internal Displacement(ValveBspFile bsp, DispInfo dispInfo)
{
_bspFile = bsp;
_dispInfo = dispInfo;
_corners = new Vector3[8];
_min = IntVector2.Zero;
_max = new IntVector2(Subdivisions, Subdivisions);
var face = bsp.FacesHdr[_dispInfo.MapFace];
var firstCornerDist2 = float.MaxValue;
Normal = bsp.Planes[face.PlaneNum].Normal;
for (var i = 0; i < 4; ++i)
{
var vert = bsp.GetVertexFromSurfEdgeId(face.FirstEdge + i);
_corners[i] = vert;
var dist2 = (_dispInfo.StartPosition - vert).LengthSquared;
if (dist2 < firstCornerDist2)
{
_firstCorner = i;
firstCornerDist2 = dist2;
}
}
}
private void WriteFace(ValveBspFile bsp, int faceIndex, GeometryPage page, List <Face> outFaces)
{
const SurfFlags ignoreFlags = SurfFlags.NODRAW | SurfFlags.LIGHT | SurfFlags.SKY | SurfFlags.SKY2D;
var faceInfo = bsp.Faces[faceIndex];
var texInfo = bsp.TextureInfos[faceInfo.TexInfo];
if ((texInfo.Flags & ignoreFlags) != 0 || texInfo.TexData < 0)
{
return;
}
var texData = bsp.TextureData[texInfo.TexData];
var matPath = bsp.GetTextureString(texData.NameStringTableId);
var meshData = GetOrCreateMeshData(bsp, page, matPath);
if (Skip)
{
return;
}
MeshElement elem;
Face face;
var leafFaceIndex = outFaces.FindIndex(x => x.Material == meshData.MaterialIndex);
if (leafFaceIndex != -1)
{
face = outFaces[leafFaceIndex];
elem = meshData.Elements[face.Element];
}
else
{
elem = new MeshElement
{
Mode = PrimitiveType.Triangles,
Material = 0,
IndexOffset = meshData.Indices.Count
};
face = new Face
{
Material = meshData.MaterialIndex,
Element = meshData.Elements.Count
};
outFaces.Add(face);
meshData.Elements.Add(elem);
}
var texScale = new Vector2(1f / Math.Max(texData.Width, 1), 1f / Math.Max(texData.Height, 1));
Vector2 lmMin, lmSize;
bsp.LightmapLayout.GetUvs(faceIndex, out lmMin, out lmSize);
if (faceInfo.DispInfo != -1)
{
var disp = bsp.DisplacementManager[faceInfo.DispInfo];
SourceUtils.Vector3 c0, c1, c2, c3;
disp.GetCorners(out c0, out c1, out c2, out c3);
var uv00 = GetUv(c0, texInfo.TextureUAxis, texInfo.TextureVAxis) * texScale;
var uv10 = GetUv(c3, texInfo.TextureUAxis, texInfo.TextureVAxis) * texScale;
var uv01 = GetUv(c1, texInfo.TextureUAxis, texInfo.TextureVAxis) * texScale;
var uv11 = GetUv(c2, texInfo.TextureUAxis, texInfo.TextureVAxis) * texScale;
var subDivMul = 1f / disp.Subdivisions;
for (var y = 0; y < disp.Subdivisions; ++y)
{
meshData.BeginPrimitive();
var v0 = (y + 0) * subDivMul;
var v1 = (y + 1) * subDivMul;
for (var x = 0; x < disp.Size; ++x)
{
var u = x * subDivMul;
meshData.VertexAttribute(VertexAttribute.Position, disp.GetPosition(x, y + 0));
meshData.VertexAttribute(VertexAttribute.Normal, disp.GetNormal(x, y + 0));
meshData.VertexAttribute(VertexAttribute.Uv,
(uv00 * (1f - u) + uv10 * u) * (1f - v0) + (uv01 * (1f - u) + uv11 * u) * v0);
meshData.VertexAttribute(VertexAttribute.Uv2, new Vector2(u, v0) * lmSize + lmMin);
meshData.VertexAttribute(VertexAttribute.Alpha, disp.GetAlpha(x, y + 0));
meshData.CommitVertex();
meshData.VertexAttribute(VertexAttribute.Position, disp.GetPosition(x, y + 1));
meshData.VertexAttribute(VertexAttribute.Normal, disp.GetNormal(x, y + 1));
meshData.VertexAttribute(VertexAttribute.Uv,
(uv00 * (1f - u) + uv10 * u) * (1f - v1) + (uv01 * (1f - u) + uv11 * u) * v1);
meshData.VertexAttribute(VertexAttribute.Uv2, new Vector2(u, v1) * lmSize + lmMin);
meshData.VertexAttribute(VertexAttribute.Alpha, disp.GetAlpha(x, y + 1));
meshData.CommitVertex();
}
meshData.CommitPrimitive(PrimitiveType.TriangleStrip);
}
}
else
{
meshData.BeginPrimitive();
var plane = bsp.Planes[faceInfo.PlaneNum];
for (int k = faceInfo.FirstEdge, kEnd = faceInfo.FirstEdge + faceInfo.NumEdges; k < kEnd; ++k)
{
var vert = bsp.GetVertexFromSurfEdgeId(k);
var uv = GetUv(vert, texInfo.TextureUAxis, texInfo.TextureVAxis);
var uv2 = GetUv(vert, texInfo.LightmapUAxis, texInfo.LightmapVAxis);
uv2.X -= faceInfo.LightMapOffsetX;
uv2.Y -= faceInfo.LightMapOffsetY;
uv2.X /= Math.Max(faceInfo.LightMapSizeX, 1);
uv2.Y /= Math.Max(faceInfo.LightMapSizeY, 1);
uv2 *= lmSize;
uv2 += lmMin;
meshData.VertexAttribute(VertexAttribute.Position, vert);
meshData.VertexAttribute(VertexAttribute.Normal, plane.Normal);
meshData.VertexAttribute(VertexAttribute.Uv, uv * texScale);
meshData.VertexAttribute(VertexAttribute.Uv2, uv2);
meshData.CommitVertex();
}
var numPrimitives = faceInfo.NumPrimitives & 0x7fff;
if (numPrimitives == 0)
{
meshData.CommitPrimitive(PrimitiveType.TriangleFan);
}
else
{
if (_sIndexBuffer == null)
{
_sIndexBuffer = new List <int>();
}
else
{
_sIndexBuffer.Clear();
}
var indices = _sIndexBuffer;
for (int k = faceInfo.FirstPrimitive, kEnd = faceInfo.FirstPrimitive + numPrimitives;
k < kEnd;
++k)
{
var primitive = bsp.Primitives[k];
for (int l = primitive.FirstIndex, lEnd = primitive.FirstIndex + primitive.IndexCount;
l < lEnd;
++l)
{
indices.Add(bsp.PrimitiveIndices[l]);
}
PrimitiveType mode;
switch (primitive.Type)
{
case ValveBsp.PrimitiveType.TriangleStrip:
mode = PrimitiveType.TriangleStrip;
break;
case ValveBsp.PrimitiveType.TriangleFan:
mode = PrimitiveType.TriangleFan;
break;
case ValveBsp.PrimitiveType.TriangleList:
mode = PrimitiveType.Triangles;
break;
default:
throw new NotImplementedException();
}
meshData.CommitPrimitive(mode, indices);
indices.Clear();
}
}
}
elem.IndexCount = meshData.Indices.Count - elem.IndexOffset;
}
private static void SerializeFace(ValveBspFile bsp, int index, VertexArray verts)
{
const SurfFlags ignoreFlags = SurfFlags.NODRAW | SurfFlags.LIGHT;
const SurfFlags skyFlags = SurfFlags.SKY2D | SurfFlags.SKY;
var face = bsp.FacesHdr[index];
var texInfo = bsp.TextureInfos[face.TexInfo];
var plane = bsp.Planes[face.PlaneNum];
if ((texInfo.Flags & ignoreFlags) != 0 || texInfo.TexData < 0)
{
return;
}
var isSky = (texInfo.Flags & skyFlags) != 0;
if (face.DispInfo != -1)
{
SerializeDisplacement(bsp, index, ref face, ref plane, verts);
return;
}
var texData = bsp.TextureData[texInfo.TexData];
var texScale = new Vector2(1f / texData.Width, 1f / texData.Height);
verts.BeginPrimitive();
for (int i = face.FirstEdge, iEnd = face.FirstEdge + face.NumEdges; i < iEnd; ++i)
{
var vert = bsp.GetVertexFromSurfEdgeId(i);
var uv = GetUv(vert, texInfo.TextureUAxis, texInfo.TextureVAxis) * texScale;
var uv2 = GetLightmapUv(bsp, vert, index, ref face, ref texInfo);
verts.AddVertex(vert, texCoord: uv, lightmapCoord: uv2);
}
var numPrimitives = face.NumPrimitives & 0x7fff;
var texStringIndex = isSky ? -1 : texData.NameStringTableId;
if (numPrimitives == 0)
{
verts.CommitPrimitive(PrimitiveType.TriangleFan, texStringIndex);
return;
}
if (_sIndicesBuffer == null)
{
_sIndicesBuffer = new List <int>();
}
for (int i = face.FirstPrimitive, iEnd = face.FirstPrimitive + numPrimitives; i < iEnd; ++i)
{
var primitive = bsp.Primitives[i];
for (int j = primitive.FirstIndex, jEnd = primitive.FirstIndex + primitive.IndexCount; j < jEnd; ++j)
{
_sIndicesBuffer.Add(bsp.PrimitiveIndices[j]);
}
verts.CommitPrimitive(primitive.Type, texStringIndex, _sIndicesBuffer);
_sIndicesBuffer.Clear();
}
}
