/// <summary>
/// Reads a <see cref="Mesh"/>
/// </summary>
/// <param name="br">The <see cref="BinaryReader"/> used to read the <see cref="Mesh"/></param>
/// <param name="ver">The game version</param>
/// <returns>A <see cref="Mesh"/></returns>
public static Mesh Read(BinaryReader br, Engine ver = Engine.Unknown)
{
var ret = new Mesh();
ret.Centre = Vertex.Read16(br);
ret.CollisionSize = br.ReadInt32();
ret.Vertices = br.ReadArray(br.ReadInt16(), () => Vertex.Read16(br));
ret.Normals = new Vertex[0];
ret.Lights = new short[0];
ret.NumNormals = br.ReadInt16();
if (ret.NumNormals >= 0)
ret.Normals = br.ReadArray(ret.NumNormals, () => Vertex.Read16(br));
else
ret.Lights = br.ReadInt16Array(-ret.NumNormals);
ret.TexturedRectangles = br.ReadArray(br.ReadInt16(), () => QuadFace.Read(br, ver));
ret.TexturedTriangles = br.ReadArray(br.ReadInt16(), () => Triangle.Read(br, ver));
if (ver < Engine.TR4)
{
ret.ColouredRectangles = br.ReadArray(br.ReadInt16(), () => QuadFace.Read(br, ver));
ret.ColouredTriangles = br.ReadArray(br.ReadInt16(), () => Triangle.Read(br, ver));
}
return ret;
}
public static void tr_setupColoredFace(Mesh trMesh, Level tr, BaseMesh mesh, ushort[] vertexIndices, int color,
Polygon p)
{
var tmp = trMesh.Lights.Length == trMesh.Vertices.Length;
for (var i = 0; i < p.Vertices.Count; i++)
{
p.Vertices[i].Color[0] = tr.Palette.Colour[color].R / 255.0f;
p.Vertices[i].Color[1] = tr.Palette.Colour[color].G / 255.0f;
p.Vertices[i].Color[2] = tr.Palette.Colour[color].B / 255.0f;
if(tmp)
{
p.Vertices[i].Color[0] = p.Vertices[i].Color[0] * 1.0f - trMesh.Lights[vertexIndices[i]] / 8192.0f;
p.Vertices[i].Color[1] = p.Vertices[i].Color[1] * 1.0f - trMesh.Lights[vertexIndices[i]] / 8192.0f;
p.Vertices[i].Color[2] = p.Vertices[i].Color[2] * 1.0f - trMesh.Lights[vertexIndices[i]] / 8192.0f;
}
p.Vertices[i].Color[3] = 1.0f;
p.Vertices[i].TexCoord[0] = (i & 2) == 2 ? 1.0f : 0.0f;
p.Vertices[i].TexCoord[1] = i >= 2 ? 1.0f : 0.0f;
}
mesh.UsesVertexColors = true;
}
public static void tr_setupTexturedFace(Mesh trMesh, BaseMesh mesh, ushort[] vertexIndices, Polygon p)
{
if (trMesh.Lights.Length == trMesh.Vertices.Length)
{
for (var i = 0; i < p.Vertices.Count; i++)
{
p.Vertices[i].Color[0] = 1.0f - trMesh.Lights[vertexIndices[i]] / 8192.0f;
p.Vertices[i].Color[1] = 1.0f - trMesh.Lights[vertexIndices[i]] / 8192.0f;
p.Vertices[i].Color[2] = 1.0f - trMesh.Lights[vertexIndices[i]] / 8192.0f;
p.Vertices[i].Color[3] = 1.0f;
}
}
else
{
foreach (var v in p.Vertices)
{
v.Color = new float[] {1, 1, 1, 1};
}
}
}
public static void tr_accumulateNormals(Mesh trMesh, BaseMesh mesh, int numCorners, ushort[] vertexIndices, Polygon p)
{
p.Vertices.Resize(numCorners, () => new Vertex());
for (var i = 0; i < numCorners; i++)
{
p.Vertices[i].Position = trMesh.Vertices[vertexIndices[i]].ToVector3();
}
p.FindNormal();
for (var i = 0; i < numCorners; i++)
{
mesh.Vertices[vertexIndices[i]].Normal += p.Plane.Normal;
}
}