protected override void OnLoad()
{
// initialize shader (load sources, create/compile/link shader program, error checking)
// when using the factory method the shader sources are retrieved from the ShaderSourceAttributes
_program = ProgramFactory.Create <GravityProgram>();
// this program will be used all the time so just activate it once and for all
_program.Use();
// create and bind a vertex array
_vao = new VertexArray();
_vao.Bind();
// create and bind transform feedback object
_feedback = new TransformFeedback();
_feedback.Bind();
// Writing to a buffer while reading from it is not allowed
// so we need two buffer objects here, which can be achieved by using the BufferPod<T> type.
// It contains two buffers, Ping and Pong, to simplify this process.
_buffers = new BufferPod <Particle>();
InitializeParticles(_particleCount);
// enable point sprite rendering
GL.Enable(EnableCap.PointSprite);
// enable modification of the point sprite size from the program (vertex shader in this case)
GL.Enable(EnableCap.ProgramPointSize);
// enable depth testing
GL.Enable(EnableCap.DepthTest);
// set a nice clear color
GL.ClearColor(Color.Black);
// set a nice camera angle
Camera.DefaultState.Position = new Vector3(0, 2, -8);
Camera.ResetToDefault();
}
/// <summary> Called by render list and executes the operation </summary>
public override void Execute(GLMatrixCalc c)
{
TransformFeedback.Bind(); // bind this transformfeedback to target transform feedback
GLStatics.Check();
// bind these buffer at offset/set and binding index starting at 0
for (int i = 0; i < VaryingBuffers.Length; i++)
{
//System.Diagnostics.Debug.WriteLine($"TF {TransformFeedback.Id} bp {i} to buf {VaryingBuffers[i].Id}");
VaryingBuffers[i].BindTransformFeedback(i, TransformFeedback.Id, Offsets == null ? 0 : Offsets[i], Sizes == null ? 0 : Sizes[i]);
}
GLStatics.Check();
GLTransformFeedback.Begin(PrimitiveType); // and start
GLStatics.Check();
}
private void OnLoad(object sender, EventArgs e)
{
// initialize shader (load sources, create/compile/link shader program, error checking)
// when using the factory method the shader sources are retrieved from the ShaderSourceAttributes
var pathToShaders = "Data\\Shaders\\";
var shaderExt = ".glsl";
var shaderCode = File.ReadAllLines(pathToShaders + "Gravity2" + shaderExt);
var vs = new Shader(shaderCode, ShaderType.VertexShader);
// TODO Bind stuff
GL.UseProgram(vs.Handle);
var fs = GL.CreateShader(ShaderType.FragmentShader);
// create and bind a vertex array
_vao = new VertexArray();
_vao.Bind();
// create and bind transform feedback object
_feedback = new TransformFeedback();
_feedback.Bind();
// Writing to a buffer while reading from it is not allowed
// so we need two buffer objects here, which can be achieved by using the BufferPod<T> type.
// It contains two buffers, Ping and Pong, to simplify this process.
_buffers = new BufferPod <Particle>();
InitializeParticles(_particleCount);
// enable point sprite rendering
GL.Enable(EnableCap.PointSprite);
// enable modification of the point sprite size from the program (vertex shader in this case)
GL.Enable(EnableCap.ProgramPointSize);
// enable depth testing
GL.Enable(EnableCap.DepthTest);
// set a nice clear color
GL.ClearColor(Color.Black);
// set a nice camera angle
Camera.DefaultState.Position = new Vector3(0, 2, -8);
Camera.ResetToDefault();
}
private void OnLoad(object sender, EventArgs e)
{
// initialize shader (load sources, create/compile/link shader program, error checking)
// when using the factory method the shader sources are retrieved from the ShaderSourceAttributes
_program = ProgramFactory.Create<GravityProgram>();
// this program will be used all the time so just activate it once and for all
_program.Use();
// create and bind a vertex array
_vao = new VertexArray();
_vao.Bind();
// create and bind transform feedback object
_feedback = new TransformFeedback();
_feedback.Bind();
// Writing to a buffer while reading from it is not allowed
// so we need two buffer objects here, which can be achieved by using the BufferPod<T> type.
// It contains two buffers, Ping and Pong, to simplify this process.
_buffers = new BufferPod<Particle>();
InitializeParticles(_particleCount);
// enable point sprite rendering
GL.Enable(EnableCap.PointSprite);
// enable modification of the point sprite size from the program (vertex shader in this case)
GL.Enable(EnableCap.ProgramPointSize);
// enable depth testing
GL.Enable(EnableCap.DepthTest);
// set a nice clear color
GL.ClearColor(Color.Black);
// set a nice camera angle
Camera.DefaultState.Position = new Vector3(0,2,-8);
Camera.ResetToDefault();
}
