private unsafe void CreateDepthBuffer()
{
var depthInfo = new ImageCreateInfo
{
SType = StructureType.ImageCreateInfo,
ImageType = ImageType.ImageType2D,
Format = DepthFormat,
Extent = new Extent3D(this.SwapchainExtent.Width, this.SwapchainExtent.Height, 1),
MipLevels = 1,
ArrayLayers = 1,
Samples = SampleCountFlags.SampleCount1Bit,
InitialLayout = ImageLayout.Undefined,
Usage = ImageUsageFlags.ImageUsageDepthStencilAttachmentBit,
SharingMode = SharingMode.Exclusive
};
var depthViewInfo = new ImageViewCreateInfo
{
SType = StructureType.ImageViewCreateInfo,
Format = DepthFormat,
Components = new ComponentMapping(ComponentSwizzle.R, ComponentSwizzle.G, ComponentSwizzle.B, ComponentSwizzle.A),
SubresourceRange = new ImageSubresourceRange(aspectMask: ImageAspectFlags.ImageAspectDepthBit, levelCount: 1, layerCount: 1),
ViewType = ImageViewType.ImageViewType2D
};
var allocInfo = new AllocationCreateInfo(usage: MemoryUsage.GPU_Only);
var image = this.Allocator.CreateImage(depthInfo, allocInfo, out Allocation alloc);
depthViewInfo.Image = image;
ImageView view;
var res = VkApi.CreateImageView(this.Device, &depthViewInfo, null, &view);
if (res != Result.Success)
{
throw new Exception("Unable to create depth image view!");
}
this.DepthBuffer.Image = image;
this.DepthBuffer.View = view;
this.DepthBuffer.Allocation = alloc;
}
private unsafe void CreateUniformBuffer() //Simpler setup from the Vertex buffer because there is no staging or device copying
{
BufferCreateInfo bufferInfo = new BufferCreateInfo
{
SType = StructureType.BufferCreateInfo,
Size = this.UniformBufferSize,
Usage = BufferUsageFlags.BufferUsageUniformBufferBit,
SharingMode = SharingMode.Exclusive
};
// Allow this to be updated every frame
var allocInfo = new AllocationCreateInfo(
usage: MemoryUsage.CPU_To_GPU,
requiredFlags: MemoryPropertyFlags.MemoryPropertyHostVisibleBit);
// Binds buffer to allocation for you
var buffer = this.Allocator.CreateBuffer(in bufferInfo, in allocInfo, out var allocation);
// Camera/MVP Matrix calculation
Camera.LookAt(new Vector3(2f, 2f, -5f), new Vector3(0, 0, 0), new Vector3(0, 1, 0));
var radFov = MathF.PI / 180f * 45f;
var aspect = (float)this.SwapchainExtent.Width / this.SwapchainExtent.Height;
Camera.Perspective(radFov, aspect, 0.5f, 100f);
Camera.UpdateMVP();
allocation.Map();
Matrix4x4 *ptr = (Matrix4x4 *)allocation.MappedData;
ptr[0] = Camera.MVPMatrix; // Camera Matrix
ptr[1] = Matrix4x4.Identity; // Model Matrix
allocation.Unmap();
this.UniformBuffer = buffer;
this.UniformAllocation = allocation;
}
