private GameObject GenerateDisplacement(int faceIndex, int dispInfoId, int modelId)
{
var face = _bsp.Faces[faceIndex];
var disp_verts = new List <UVector3>();
var UVs = new List <UVector2>();
var UV2s = new List <UVector2>();
var cols = new List <Color>();
var indices = new List <int>();
var normals = new List <UVector3>();
var texInfo = _bsp.TextureInfos[face.TexInfo];
var texData = _bsp.TextureData[texInfo.TexData];
_bsp.LightmapLayout.GetUvs(faceIndex, out SVector2 lmMin, out SVector2 lmSize);
var disp = _bsp.DisplacementManager[dispInfoId];
disp.GetCorners(out SVector3 c0, out SVector3 c1, out SVector3 c2, out SVector3 c3);
var texScale = new SVector2(1f / Math.Max(texData.Width, 1), 1f / Math.Max(texData.Height, 1));
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)
{
var v0 = (y + 0) * subDivMul;
var v1 = (y + 1) * subDivMul;
for (var x = 0; x < disp.Size; ++x)
{
var u = x * subDivMul;
var vert1 = disp.GetPosition(x, y + 0).ToUVector();
var uv1 = ((uv00 * (1f - u) + uv10 * u) * (1f - v0) + (uv01 * (1f - u) + uv11 * u) * v0).ToUVector();
var uv21 = (new SVector2(u, v0) * lmSize + lmMin).ToUVector();
var normal1 = disp.GetNormal(x, y + 0).ToUVector();
var color1 = new Color(disp.GetAlpha(x, y + 0) / 4f, 0, 0, 0);
disp_verts.Add(vert1);
UVs.Add(uv1);
UV2s.Add(uv21);
normals.Add(normal1);
cols.Add(color1);
var vert2 = disp.GetPosition(x, y + 1).ToUVector();
var uv2 = ((uv00 * (1f - u) + uv10 * u) * (1f - v1) + (uv01 * (1f - u) + uv11 * u) * v1).ToUVector();
var uv22 = (new SVector2(u, v1) * lmSize + lmMin).ToUVector();
var normal2 = disp.GetNormal(x, y + 1).ToUVector();
var color2 = new Color(disp.GetAlpha(x, y + 1) / 4f, 0, 0, 0);
disp_verts.Add(vert2);
UVs.Add(uv2);
UV2s.Add(uv22);
normals.Add(normal2);
cols.Add(color2);
if (x != disp.Size - 1)
{
var j = disp_verts.Count - 2;
indices.Add(j);
indices.Add(j + 1);
indices.Add(j + 2);
indices.Add(j + 3);
indices.Add(j + 2);
indices.Add(j + 1);
}
}
}
for (int i = 0; i < disp_verts.Count; i++)
{
disp_verts[i] *= _options.WorldScale;
}
GameObject faceObject = new GameObject("DispFace: " + modelId);
MeshRenderer mr = faceObject.AddComponent <MeshRenderer>();
mr.shadowCastingMode = UnityEngine.Rendering.ShadowCastingMode.On;
mr.receiveShadows = true;
mr.lightmapIndex = _currentLightmap;
MeshFilter mf = faceObject.AddComponent <MeshFilter>();
mf.sharedMesh = new Mesh();
mf.sharedMesh.name = "DispFace " + modelId;
mf.sharedMesh.vertices = disp_verts.ToArray();
mf.sharedMesh.triangles = indices.ToArray();
mf.sharedMesh.uv = UVs.ToArray();
mf.sharedMesh.uv2 = UV2s.ToArray();
mf.sharedMesh.normals = normals.ToArray();
mf.sharedMesh.colors = cols.ToArray();
mf.sharedMesh.RecalculateTangents();
mf.sharedMesh.RecalculateBounds();
// todo: blend textures on vert R value
//mf.sharedMesh.colors = cols.ToArray();
faceObject.gameObject.AddComponent <MeshCollider>();
var texString = _bsp.GetTextureString(texData.NameStringTableId);
var materialPath = "materials/" + texString + ".vmt";
LoadMaterial(mr, materialPath);
return(faceObject);
}
public static UnityEngine.Vector2 ToUVector(this SourceUtils.Vector2 vec)
{
return(new UnityEngine.Vector2(vec.X, vec.Y));
}