public TransformFeedbackCalculator(int maxItemCount)
{
this.MaxItemCount = maxItemCount;
var program = new ShaderProgram();
//program.Initialize(varyings, ShaderProgram.BufferMode.InterLeaved, vertexShader);
var varyings = new string[] { "outValue" };
glTransformFeedbackVaryings(program.ProgramId, varyings.Length, varyings, GL.GL_INTERLEAVED_ATTRIBS);
var vertexShader = new VertexShader(vertexCode);
vertexShader.Initialize();
glAttachShader(program.ProgramId, vertexShader.ShaderId);
glLinkProgram(program.ProgramId);
program.CheckLinkStatus();
VertexBuffer vbo = VertexBuffer.Create(typeof(float), maxItemCount, VBOConfig.Float, BufferUsage.StaticDraw);
var drawCmd = new DrawArraysCmd(DrawMode.Points, maxItemCount);
var vao = new VertexArrayObject(drawCmd, program, new VertexShaderAttribute[] { new VertexShaderAttribute(vbo, "inValue") });
uint index = 0;
VertexBuffer tbo = VertexBuffer.Create(typeof(float), maxItemCount, VBOConfig.Float, BufferUsage.StaticRead);
glBindBufferBase(GL.GL_TRANSFORM_FEEDBACK_BUFFER, index, tbo.BufferId);
{
this.program = program;
this.inputBuffer = vbo;
this.outputBuffer = tbo;
this.vao = vao;
this.drawCommand = drawCmd;
}
}
protected async Task RegVSAssets(string name)
{
VertexShader vertexShader = new VertexShader();
vertexShader.Initialize(await ReadFile(assetsUri + name));
VSAssets.Add(name, vertexShader);
}
protected async Task ReloadVertexShader(VertexShader vertexShader, string uri)
{
vertexShader.Initialize(await ReadFile(uri));
}
