/// <summary>
///
/// </summary>
/// <returns></returns>
protected override IndependentBufferPtr Upload2GPU()
{
uint[] buffers = new uint[1];
glGenBuffers(1, buffers);
const uint target = OpenGL.GL_SHADER_STORAGE_BUFFER;
glBindBuffer(target, buffers[0]);
glBufferData(target, this.ByteLength, this.Header, (uint)this.Usage);
glBindBuffer(target, 0);
var bufferPtr = new ShaderStorageBufferPtr(buffers[0], this.Length, this.ByteLength);
return(bufferPtr);
}
protected override void DoInitialize()
{
base.DoInitialize();
var texture = new Texture(TextureTarget.Texture2D,
new NullImageFiller(WIDTH, HEIGHT, OpenGL.GL_RGBA8, OpenGL.GL_RGBA, OpenGL.GL_UNSIGNED_BYTE),
new SamplerParameters(
TextureWrapping.Repeat, TextureWrapping.Repeat, TextureWrapping.Repeat,
TextureFilter.Linear, TextureFilter.Linear));
texture.Initialize();
this.texture = texture;
this.SetUniform("u_texture", texture);
{
var shaderCodes = new ShaderCode[] { new ShaderCode(File.ReadAllText(@"shaders\RayTracingRenderer\raytrace.comp.glsl"), ShaderType.ComputeShader), };
this.computeProgram = shaderCodes.CreateProgram();
this.computeProgram.Bind();
g_directionBuffer.glusRaytracePerspectivef(
DIRECTION_BUFFER_PADDING, 30.0f, WIDTH, HEIGHT);
using (var buffer = new ShaderStorageBuffer <float>(BufferUsage.StaticDraw))
{
buffer.Create(g_directionBuffer.Length);
unsafe
{
var array = (float *)buffer.Header.ToPointer();
for (int i = 0; i < g_directionBuffer.Length; i++)
{
array[i] = g_directionBuffer[i];
}
}
this.g_directionSSBO = buffer.GetBufferPtr() as ShaderStorageBufferPtr;
}
using (var buffer = new ShaderStorageBuffer <float>(BufferUsage.StaticDraw))
{
buffer.Create(g_positionBuffer.Length);
unsafe
{
var array = (float *)buffer.Header.ToPointer();
for (int i = 0; i < g_positionBuffer.Length; i++)
{
array[i] = g_positionBuffer[i];
}
}
this.g_positionSSBO = buffer.GetBufferPtr() as ShaderStorageBufferPtr;
}
using (var buffer = new ShaderStorageBuffer <float>(BufferUsage.StaticDraw))
{
buffer.Create(g_stackBuffer.Length);
unsafe
{
var array = (float *)buffer.Header.ToPointer();
for (int i = 0; i < g_stackBuffer.Length; i++)
{
array[i] = g_stackBuffer[i];
}
}
this.g_stackSSBO = buffer.GetBufferPtr() as ShaderStorageBufferPtr;
}
using (var buffer = new ShaderStorageBuffer <Sphere>(BufferUsage.StaticDraw))
{
buffer.Create(g_sphereBuffer.Length);
unsafe
{
var array = (Sphere *)buffer.Header.ToPointer();
for (int i = 0; i < g_sphereBuffer.Length; i++)
{
array[i] = g_sphereBuffer[i];
}
}
this.g_sphereSSBO = buffer.GetBufferPtr() as ShaderStorageBufferPtr;
}
using (var buffer = new ShaderStorageBuffer <PointLight>(BufferUsage.StaticDraw))
{
buffer.Create(g_lightBuffer.Length);
unsafe
{
var array = (PointLight *)buffer.Header.ToPointer();
for (int i = 0; i < g_lightBuffer.Length; i++)
{
array[i] = g_lightBuffer[i];
}
}
this.g_pointLightSSBO = buffer.GetBufferPtr() as ShaderStorageBufferPtr;
}
}
}
