private static async Task <int> ReadVertices(BufferedReader reader, IReadOnlyCollection <VertexAttribute> attributes)
{
if (await reader.ReadToken().ConfigureAwait(false) != Token.Vertices)
{
throw new CmodException("Expected vertices");
}
var vertexCount = await reader.ReadInt32().ConfigureAwait(false);
if (vertexCount <= 0)
{
throw new CmodException("Vertex count out of range");
}
foreach (var attribute in attributes)
{
attribute.Capacity = vertexCount;
}
for (var i = 0; i < vertexCount; ++i)
{
foreach (var attribute in attributes)
{
await attribute.Read(reader).ConfigureAwait(false);
}
}
return(vertexCount);
}
private static async ValueTask <Material> ReadMaterial(BufferedReader reader)
{
var material = new Material();
while (true)
{
switch (await reader.ReadToken().ConfigureAwait(false))
{
case Token.Diffuse:
material.Diffuse = await reader.ReadColor().ConfigureAwait(false);
break;
case Token.Specular:
material.Specular = await reader.ReadColor().ConfigureAwait(false);
break;
case Token.Emissive:
material.Emissive = await reader.ReadColor().ConfigureAwait(false);
break;
case Token.SpecularPower:
material.SpecularPower = await reader.ReadFloat1().ConfigureAwait(false);
break;
case Token.Opacity:
material.Opacity = await reader.ReadFloat1().ConfigureAwait(false);
break;
case Token.Blend:
material.BlendMode = await reader.ReadBlendMode().ConfigureAwait(false);
break;
case Token.Texture:
var textureSemantic = await reader.ReadTextureSemantic().ConfigureAwait(false);
var textureFile = await reader.ReadCmodString().ConfigureAwait(false);
material.Textures.Add(textureSemantic, textureFile);
break;
case Token.EndMaterial:
return(material);
default:
throw new CmodException("Unexpected token in material");
}
}
}
private static async Task <IReadOnlyList <VertexAttribute> > ReadVertexDescription(BufferedReader reader)
{
if (await reader.ReadToken().ConfigureAwait(false) != Token.VertexDesc)
{
throw new CmodException("Expected vertex description");
}
var attributes = new List <VertexAttribute>();
while (true)
{
var token = await reader.ReadInt16().ConfigureAwait(false);
if (token == (short)Token.EndVertexDesc)
{
return(attributes);
}
var attribute = (AttributeType)token;
if (!Enum.IsDefined(attribute))
{
throw new CmodException("Unknown vertex attribute");
}
if (attributes.Any(a => a.AttributeType == attribute))
{
throw new CmodException("Duplicate vertex attribute");
}
var format = await reader.ReadAttributeFormat().ConfigureAwait(false);
if (!Enum.IsDefined(format))
{
throw new CmodException("Invalid attribute format");
}
attributes.Add(VertexAttribute.Create(attribute, format));
}
}