public static void WriteCompressedVector4f(this BinaryWriter writer, vector4f vec4)
{
float x = ((vec4.x / 2.0f) + 0.5f).FitRange(0.0f, 1.0f);
float y = ((vec4.y / 2.0f) + 0.5f).FitRange(0.0f, 1.0f);
float z = ((vec4.z / 2.0f) + 0.5f).FitRange(0.0f, 1.0f);
float w = ((vec4.w / 2.0f) + 0.5f).FitRange(0.0f, 1.0f);
writer.Write((byte)Math.Round(w * 255.0f));
writer.Write((byte)Math.Round(z * 255.0f));
writer.Write((byte)Math.Round(y * 255.0f));
writer.Write((byte)Math.Round(x * 255.0f));
}
public void Read(BinaryReader data, VertexFormat format)
{
if (format == VertexFormat.Pixlit1UvNmap)
{
Pos = data.ReadVector3f();
Normal = data.ReadCompressedVector4f();
Tangent = data.ReadCompressedVector4f();
Uvs = new vector4f(data.ReadInt16(), data.ReadInt16(), 0.0f, 0.0f);
}
else if (format == VertexFormat.Pixlit3UvNmap)
{
Pos = data.ReadVector3f();
Normal = data.ReadCompressedVector4f();
Tangent = data.ReadCompressedVector4f();
Uvs = new vector4f(data.ReadInt16(), data.ReadInt16(), 0.0f, 0.0f);
data.Skip(8); //Skip other UVs, .obj files only support 1 uv per object so for now need to ignore these. These are usually just 0,0 anyway
}
else
{
throw new Exception($"{format.ToString()} is an unsupported vertex format! Please show the maintainer of this tool this error and the related mesh file.");
}
}
