protected override void InitializeScene()
{
Add(DebugConsoleComponent.CreateConsole());
Matrix4 proj = Matrix4.CreatePerspectiveFieldOfView(
MathHelper.DegreesToRadians(75f), //Field of View Vertical
16f / 9f, //Aspect Ratio
0.1f, //Near Plane
1000f); //Far Plane
BasicCamera bc = new BasicCamera(proj, Vector3.Zero);
Add(bc); //Adding the BasicCamera(That is a gameobject under the hood) to the scene to receive events
SetCamera(bc); //Sets the Camera as the "active" camera that the scene will be rendered from.
//Image size in bytes(Width * Height * ChannelCount)
int imageSize = 512 * 512 * 4;
//Creating a Kernel Database that will load all the Kernels contained in the asset directory
KernelDatabase db = new KernelDatabase(CLAPI.MainThread, "assets/test_kernel/", DataVectorTypes.Uchar1);
//We try to get the kernel_red from the file assets/test_kernel/red.cl
db.TryGetClKernel("kernel_red", out CLKernel redKernel);
//Creating a MemoryBuffer with size of the image.
//We are using the CLAPI instance of the main thread and specify that we`d like to read/write from the buffer
MemoryBuffer imageBuffer = CLAPI.CreateEmpty <byte>(CLAPI.MainThread, imageSize, MemoryFlag.ReadWrite,
"CLMemoryBufferForBox");
//With plain OpenCL you would need to Set the Arguments/Buffers by their argument index/types/size/yada yads,
//thanks to the CL abstraction for the engine, we can just specify the argument name how we do in OpenGL Shaders(But Faster).
redKernel.SetBuffer("imageData", imageBuffer);
//Set Arg has the capabilities to automatically cast the value that is passed to the right type,
//however this is not really fast and can be avoided by specifying the correct type directly.
redKernel.SetArg("strength", 0.5f); //We directly pass a float, no casting required
//When We pass something as byte(uchar in cl), we need to cast it.
//If we dont the Engine OpenCL Wrapper will automatically convert the integer into a byte, but it will apply rescaling
// This takes over automatic type conversion from float(opengl) to byte(System.Bitmap/opencl)
// Calculation when not passed: (4 / Int32.MaxSize) * byte.MaxValue.
redKernel.SetArg("channelCount", (byte)4);
//This Line runs the kernel.
CLAPI.Run(CLAPI.MainThread, redKernel, imageSize);
//After the kernel ran, we can read the buffer we have passed to the kernel and Convert it into a OpenGL Texture.
Texture tex = TextureLoader.BytesToTexture(CLAPI.ReadBuffer <byte>(CLAPI.MainThread, imageBuffer, imageSize),
512, 512, "BoxTexture");
GameObject box = new GameObject(-Vector3.UnitZ * 4, "Box"); //Creating a new Empty GameObject
LitMeshRendererComponent lmr = new LitMeshRendererComponent( //Creating a Renderer Component
DefaultFilepaths.DefaultLitShader, //The OpenGL Shader used(Unlit and Lit shaders are provided)
Prefabs.Cube, //The Mesh that is going to be used by the MeshRenderer
tex, //Diffuse Texture to put on the mesh
1); //Render Mask (UI = 1 << 30)
box.AddComponent(lmr); //Attaching the Renderer to the GameObject
box.AddComponent(new RotateSelfComponent()); //Adding a component that rotates the Object on the Y-Axis
Add(box); //Adding the Object to the Scene.
}
/// <summary>
/// Returns the currently active buffer
/// </summary>
/// <returns>The active buffer read from the gpu and placed in cpu memory</returns>
public T[] GetResult <T>() where T : struct
{
return(CLAPI.ReadBuffer <T>(_currentBuffer.Buffer, (int)_currentBuffer.Buffer.Size));
}
public static void UpdateTexture(this Texture tex, CLAPI instance, MemoryBuffer buffer, int width, int height)
{
TextureLoader.Update(tex, CLAPI.ReadBuffer <byte>(instance, buffer, (int)buffer.Size), width, height);
}
