public Shader Build(bool log = false)
{
Context.VertexDeclaration = VertexDeclaration;
Context.MarkUsedVariables(() => FragmentShader.Generate(Context), GlFragColor, GlFragDepth);
var commonCode = buildCommon();
var vertexShaderCode = buildVertexShader();
var fragmentShaderCode = buildFragmentShader();
if (log)
{
Trace.WriteLine("--- VERTEX ---");
Trace.WriteLine(commonCode + vertexShaderCode);
Trace.WriteLine("--- FRAGMENT ---");
Trace.WriteLine(commonCode + fragmentShaderCode);
}
return(new Shader(commonCode + vertexShaderCode, commonCode + fragmentShaderCode));
}
public void Condition(Func <string> expression, ShaderSnippet trueSnippet, ShaderSnippet falseSnippet)
{
checkCanReceiveCommands();
if (code != null)
{
FlowDependant(() => $"if ({expression()})\n{{");
trueSnippet.Generate(this);
if (falseSnippet != null)
{
code.AppendLine("}\nelse\n{");
falseSnippet.Generate(this);
}
code.AppendLine("}");
}
else
{
FlowDependant(expression);
trueSnippet.Generate(this);
falseSnippet?.Generate(this);
}
}
private string buildVertexShader()
{
var code = new StringBuilder();
// Attributes
foreach (var attribute in VertexDeclaration)
{
code.AppendLine($"attribute {attribute.ShaderTypeName} {attribute.Name};");
}
VertexShader.GenerateFunctions(code);
// Main function
code.AppendLine("void main() {");
ProgramScope.DeclareUnusedVaryingsAsVariables(code, Context);
VertexShaderScope.DeclareVariables(code);
Context.GenerateCode(code, () => VertexShader.Generate(Context));
code.AppendLine("}");
return(code.ToString());
}
