public void InitVulkan()
{
VkResult err;
err = CreateInstance(false);
if (err != VkResult.Success)
{
throw new InvalidOperationException("Could not create Vulkan instance. Error: " + err);
}
if (Settings.Validation)
{
}
// Physical Device
uint gpuCount = 0;
Util.CheckResult(vkEnumeratePhysicalDevices(Instance, &gpuCount, null));
Debug.Assert(gpuCount > 0);
// Enumerate devices
IntPtr *physicalDevices = stackalloc IntPtr[(int)gpuCount];
err = vkEnumeratePhysicalDevices(Instance, &gpuCount, (VkPhysicalDevice *)physicalDevices);
if (err != VkResult.Success)
{
throw new InvalidOperationException("Could not enumerate physical devices.");
}
// GPU selection
// Select physical Device to be used for the Vulkan example
// Defaults to the first Device unless specified by command line
uint selectedDevice = 0;
// TODO: Implement arg parsing, etc.
physicalDevice = ((VkPhysicalDevice *)physicalDevices)[selectedDevice];
// Store properties (including limits) and features of the phyiscal Device
// So examples can check against them and see if a feature is actually supported
VkPhysicalDeviceProperties deviceProperties;
vkGetPhysicalDeviceProperties(physicalDevice, &deviceProperties);
DeviceProperties = deviceProperties;
VkPhysicalDeviceFeatures deviceFeatures;
vkGetPhysicalDeviceFeatures(physicalDevice, &deviceFeatures);
DeviceFeatures = deviceFeatures;
// Gather physical Device memory properties
VkPhysicalDeviceMemoryProperties deviceMemoryProperties;
vkGetPhysicalDeviceMemoryProperties(physicalDevice, &deviceMemoryProperties);
DeviceMemoryProperties = deviceMemoryProperties;
// Derived examples can override this to set actual features (based on above readings) to enable for logical device creation
getEnabledFeatures();
// Vulkan Device creation
// This is handled by a separate class that gets a logical Device representation
// and encapsulates functions related to a Device
vulkanDevice = new vksVulkanDevice(physicalDevice);
VkResult res = vulkanDevice.CreateLogicalDevice(enabledFeatures, EnabledExtensions);
if (res != VkResult.Success)
{
throw new InvalidOperationException("Could not create Vulkan Device.");
}
device = vulkanDevice.LogicalDevice;
// Get a graphics queue from the Device
VkQueue queue;
vkGetDeviceQueue(device, vulkanDevice.QFIndices.Graphics, 0, &queue);
this.queue = queue;
// Find a suitable depth format
VkFormat depthFormat;
uint validDepthFormat = Tools.getSupportedDepthFormat(physicalDevice, &depthFormat);
Debug.Assert(validDepthFormat == True);
DepthFormat = depthFormat;
Swapchain.Connect(Instance, physicalDevice, device);
// Create synchronization objects
VkSemaphoreCreateInfo semaphoreCreateInfo = Initializers.semaphoreCreateInfo();
// Create a semaphore used to synchronize image presentation
// Ensures that the image is displayed before we start submitting new commands to the queu
Util.CheckResult(vkCreateSemaphore(device, &semaphoreCreateInfo, null, &GetSemaphoresPtr()->PresentComplete));
// Create a semaphore used to synchronize command submission
// Ensures that the image is not presented until all commands have been sumbitted and executed
Util.CheckResult(vkCreateSemaphore(device, &semaphoreCreateInfo, null, &GetSemaphoresPtr()->RenderComplete));
// Create a semaphore used to synchronize command submission
// Ensures that the image is not presented until all commands for the text overlay have been sumbitted and executed
// Will be inserted after the render complete semaphore if the text overlay is enabled
Util.CheckResult(vkCreateSemaphore(device, &semaphoreCreateInfo, null, &GetSemaphoresPtr()->TextOverlayComplete));
// Set up submit info structure
// Semaphores will stay the same during application lifetime
// Command buffer submission info is set by each example
submitInfo = Initializers.SubmitInfo();
submitInfo.pWaitDstStageMask = (VkPipelineStageFlags *)submitPipelineStages.Data;
submitInfo.waitSemaphoreCount = 1;
submitInfo.pWaitSemaphores = &GetSemaphoresPtr()->PresentComplete;
submitInfo.signalSemaphoreCount = 1;
submitInfo.pSignalSemaphores = &GetSemaphoresPtr()->RenderComplete;
}
/**
* Loads a 3D model from a file into Vulkan buffers
*
* @param device Pointer to the Vulkan device used to generated the vertex and index buffers on
* @param filename File to load (must be a model format supported by ASSIMP)
* @param layout Vertex layout components (position, normals, tangents, etc.)
* @param scale Load time scene scale
* @param copyQueue Queue used for the memory staging copy commands (must support transfer)
* @param (Optional) flags ASSIMP model loading flags
*/
public bool loadFromFile(string filename, vksVertexLayout layout, float scale, vksVulkanDevice device, VkQueue copyQueue, PostProcessSteps flags = DefaultPostProcessSteps)
{
vksModelCreateInfo modelCreateInfo = new vksModelCreateInfo(scale, 1.0f, 0.0f);
return(loadFromFile(filename, layout, &modelCreateInfo, device, copyQueue, flags));
}
/**
* Load a 2D texture including all mip levels
*
* @param filename File to load (supports .ktx and .dds)
* @param format Vulkan format of the image data stored in the file
* @param device Vulkan device to create the texture on
* @param copyQueue Queue used for the texture staging copy commands (must support transfer)
* @param (Optional) imageUsageFlags Usage flags for the texture's image (defaults to VK_IMAGE_USAGE_SAMPLED_BIT)
* @param (Optional) imageLayout Usage layout for the texture (defaults VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL)
* @param (Optional) forceLinear Force linear tiling (not advised, defaults to false)
*
*/
public void loadFromFile(
string filename,
VkFormat format,
vksVulkanDevice device,
VkQueue copyQueue,
VkImageUsageFlags imageUsageFlags = VkImageUsageFlags.Sampled,
VkImageLayout imageLayout = VkImageLayout.ShaderReadOnlyOptimal,
bool forceLinear = false)
{
KtxFile tex2D;
using (var fs = File.OpenRead(filename))
{
tex2D = KtxFile.Load(fs, false);
}
this.device = device;
width = tex2D.Header.PixelWidth;
height = tex2D.Header.PixelHeight;
if (height == 0)
{
height = width;
}
mipLevels = tex2D.Header.NumberOfMipmapLevels;
// Get device properites for the requested texture format
VkFormatProperties formatProperties;
vkGetPhysicalDeviceFormatProperties(device.PhysicalDevice, format, out formatProperties);
// Only use linear tiling if requested (and supported by the device)
// Support for linear tiling is mostly limited, so prefer to use
// optimal tiling instead
// On most implementations linear tiling will only support a very
// limited amount of formats and features (mip maps, cubemaps, arrays, etc.)
bool useStaging = !forceLinear;
VkMemoryAllocateInfo memAllocInfo = Initializers.memoryAllocateInfo();
VkMemoryRequirements memReqs;
// Use a separate command buffer for texture loading
VkCommandBuffer copyCmd = device.createCommandBuffer(VkCommandBufferLevel.Primary, true);
if (useStaging)
{
// Create a host-visible staging buffer that contains the raw image data
VkBuffer stagingBuffer;
VkDeviceMemory stagingMemory;
VkBufferCreateInfo bufferCreateInfo = Initializers.bufferCreateInfo();
bufferCreateInfo.size = tex2D.GetTotalSize();
// This buffer is used as a transfer source for the buffer copy
bufferCreateInfo.usage = VkBufferUsageFlags.TransferSrc;
bufferCreateInfo.sharingMode = VkSharingMode.Exclusive;
Util.CheckResult(vkCreateBuffer(device.LogicalDevice, &bufferCreateInfo, null, &stagingBuffer));
// Get memory requirements for the staging buffer (alignment, memory type bits)
vkGetBufferMemoryRequirements(device.LogicalDevice, stagingBuffer, &memReqs);
memAllocInfo.allocationSize = memReqs.size;
// Get memory type index for a host visible buffer
memAllocInfo.memoryTypeIndex = device.getMemoryType(memReqs.memoryTypeBits, VkMemoryPropertyFlags.HostVisible | VkMemoryPropertyFlags.HostCoherent);
Util.CheckResult(vkAllocateMemory(device.LogicalDevice, &memAllocInfo, null, &stagingMemory));
Util.CheckResult(vkBindBufferMemory(device.LogicalDevice, stagingBuffer, stagingMemory, 0));
// Copy texture data into staging buffer
byte *data;
Util.CheckResult(vkMapMemory(device.LogicalDevice, stagingMemory, 0, memReqs.size, 0, (void **)&data));
byte[] pixelData = tex2D.GetAllTextureData();
fixed(byte *pixelDataPtr = &pixelData[0])
{
Unsafe.CopyBlock(data, pixelDataPtr, (uint)pixelData.Length);
}
vkUnmapMemory(device.LogicalDevice, stagingMemory);
// Setup buffer copy regions for each mip level
NativeList <VkBufferImageCopy> bufferCopyRegions = new NativeList <VkBufferImageCopy>();
uint offset = 0;
for (uint i = 0; i < mipLevels; i++)
{
VkBufferImageCopy bufferCopyRegion = new VkBufferImageCopy();
bufferCopyRegion.imageSubresource.aspectMask = VkImageAspectFlags.Color;
bufferCopyRegion.imageSubresource.mipLevel = i;
bufferCopyRegion.imageSubresource.baseArrayLayer = 0;
bufferCopyRegion.imageSubresource.layerCount = 1;
bufferCopyRegion.imageExtent.width = tex2D.Faces[0].Mipmaps[i].Width;
bufferCopyRegion.imageExtent.height = tex2D.Faces[0].Mipmaps[i].Height;
bufferCopyRegion.imageExtent.depth = 1;
bufferCopyRegion.bufferOffset = offset;
bufferCopyRegions.Add(bufferCopyRegion);
offset += tex2D.Faces[0].Mipmaps[i].SizeInBytes;
}
// Create optimal tiled target image
VkImageCreateInfo imageCreateInfo = Initializers.imageCreateInfo();
imageCreateInfo.imageType = VkImageType._2d;
imageCreateInfo.format = format;
imageCreateInfo.mipLevels = mipLevels;
imageCreateInfo.arrayLayers = 1;
imageCreateInfo.samples = VkSampleCountFlags._1;
imageCreateInfo.tiling = VkImageTiling.Optimal;
imageCreateInfo.sharingMode = VkSharingMode.Exclusive;
imageCreateInfo.initialLayout = VkImageLayout.Undefined;
imageCreateInfo.extent = new VkExtent3D {
width = width, height = height, depth = 1
};
imageCreateInfo.usage = imageUsageFlags;
// Ensure that the TRANSFER_DST bit is set for staging
if ((imageCreateInfo.usage & VkImageUsageFlags.TransferDst) == 0)
{
imageCreateInfo.usage |= VkImageUsageFlags.TransferDst;
}
Util.CheckResult(vkCreateImage(device.LogicalDevice, &imageCreateInfo, null, out image));
vkGetImageMemoryRequirements(device.LogicalDevice, image, &memReqs);
memAllocInfo.allocationSize = memReqs.size;
memAllocInfo.memoryTypeIndex = device.getMemoryType(memReqs.memoryTypeBits, VkMemoryPropertyFlags.DeviceLocal);
Util.CheckResult(vkAllocateMemory(device.LogicalDevice, &memAllocInfo, null, out deviceMemory));
Util.CheckResult(vkBindImageMemory(device.LogicalDevice, image, deviceMemory, 0));
VkImageSubresourceRange subresourceRange = new VkImageSubresourceRange();
subresourceRange.aspectMask = VkImageAspectFlags.Color;
subresourceRange.baseMipLevel = 0;
subresourceRange.levelCount = mipLevels;
subresourceRange.layerCount = 1;
// Image barrier for optimal image (target)
// Optimal image will be used as destination for the copy
Tools.setImageLayout(
copyCmd,
image,
VkImageAspectFlags.Color,
VkImageLayout.Undefined,
VkImageLayout.TransferDstOptimal,
subresourceRange);
// Copy mip levels from staging buffer
vkCmdCopyBufferToImage(
copyCmd,
stagingBuffer,
image,
VkImageLayout.TransferDstOptimal,
bufferCopyRegions.Count,
bufferCopyRegions.Data);
// Change texture image layout to shader read after all mip levels have been copied
this.imageLayout = imageLayout;
Tools.setImageLayout(
copyCmd,
image,
VkImageAspectFlags.Color,
VkImageLayout.TransferDstOptimal,
imageLayout,
subresourceRange);
device.flushCommandBuffer(copyCmd, copyQueue);
// Clean up staging resources
vkFreeMemory(device.LogicalDevice, stagingMemory, null);
vkDestroyBuffer(device.LogicalDevice, stagingBuffer, null);
}
else
{
throw new NotImplementedException();
/*
* // Prefer using optimal tiling, as linear tiling
* // may support only a small set of features
* // depending on implementation (e.g. no mip maps, only one layer, etc.)
*
* // Check if this support is supported for linear tiling
* Debug.Assert((formatProperties.linearTilingFeatures & VkFormatFeatureFlags.SampledImage) != 0);
*
* VkImage mappableImage;
* VkDeviceMemory mappableMemory;
*
* VkImageCreateInfo imageCreateInfo = Initializers.imageCreateInfo();
* imageCreateInfo.imageType = VkImageType._2d;
* imageCreateInfo.format = format;
* imageCreateInfo.extent = new VkExtent3D { width = width, height = height, depth = 1 };
* imageCreateInfo.mipLevels = 1;
* imageCreateInfo.arrayLayers = 1;
* imageCreateInfo.samples = VkSampleCountFlags._1;
* imageCreateInfo.tiling = VkImageTiling.Linear;
* imageCreateInfo.usage = imageUsageFlags;
* imageCreateInfo.sharingMode = VkSharingMode.Exclusive;
* imageCreateInfo.initialLayout = VkImageLayout.Undefined;
*
* // Load mip map level 0 to linear tiling image
* Util.CheckResult(vkCreateImage(device.LogicalDevice, &imageCreateInfo, null, &mappableImage));
*
* // Get memory requirements for this image
* // like size and alignment
* vkGetImageMemoryRequirements(device.LogicalDevice, mappableImage, &memReqs);
* // Set memory allocation size to required memory size
* memAllocInfo.allocationSize = memReqs.size;
*
* // Get memory type that can be mapped to host memory
* memAllocInfo.memoryTypeIndex = device.GetMemoryType(memReqs.memoryTypeBits, VkMemoryPropertyFlags.HostVisible | VkMemoryPropertyFlags.HostCoherent);
*
* // Allocate host memory
* Util.CheckResult(vkAllocateMemory(device.LogicalDevice, &memAllocInfo, null, &mappableMemory));
*
* // Bind allocated image for use
* Util.CheckResult(vkBindImageMemory(device.LogicalDevice, mappableImage, mappableMemory, 0));
*
* // Get sub resource layout
* // Mip map count, array layer, etc.
* VkImageSubresource subRes = new VkImageSubresource();
* subRes.aspectMask = VkImageAspectFlags.Color;
* subRes.mipLevel = 0;
*
* VkSubresourceLayout subResLayout;
* void* data;
*
* // Get sub resources layout
* // Includes row pitch, size offsets, etc.
* vkGetImageSubresourceLayout(device.LogicalDevice, mappableImage, &subRes, &subResLayout);
*
* // Map image memory
* Util.CheckResult(vkMapMemory(device.LogicalDevice, mappableMemory, 0, memReqs.size, 0, &data));
*
* // Copy image data into memory
* memcpy(data, tex2D[subRes.mipLevel].data(), tex2D[subRes.mipLevel].size());
*
* vkUnmapMemory(device.LogicalDevice, mappableMemory);
*
* // Linear tiled images don't need to be staged
* // and can be directly used as textures
* image = mappableImage;
* deviceMemory = mappableMemory;
* imageLayout = imageLayout;
*
* // Setup image memory barrier
* vks::tools::setImageLayout(copyCmd, image, VkImageAspectFlags.Color, VkImageLayout.Undefined, imageLayout);
*
* device.flushCommandBuffer(copyCmd, copyQueue);
*/
}
// Create a defaultsampler
VkSamplerCreateInfo samplerCreateInfo = VkSamplerCreateInfo.New();
samplerCreateInfo.magFilter = VkFilter.Linear;
samplerCreateInfo.minFilter = VkFilter.Linear;
samplerCreateInfo.mipmapMode = VkSamplerMipmapMode.Linear;
samplerCreateInfo.addressModeU = VkSamplerAddressMode.Repeat;
samplerCreateInfo.addressModeV = VkSamplerAddressMode.Repeat;
samplerCreateInfo.addressModeW = VkSamplerAddressMode.Repeat;
samplerCreateInfo.mipLodBias = 0.0f;
samplerCreateInfo.compareOp = VkCompareOp.Never;
samplerCreateInfo.minLod = 0.0f;
// Max level-of-detail should match mip level count
samplerCreateInfo.maxLod = (useStaging) ? (float)mipLevels : 0.0f;
// Enable anisotropic filtering
samplerCreateInfo.maxAnisotropy = 8;
samplerCreateInfo.anisotropyEnable = True;
samplerCreateInfo.borderColor = VkBorderColor.FloatOpaqueWhite;
Util.CheckResult(vkCreateSampler(device.LogicalDevice, &samplerCreateInfo, null, out sampler));
// Create image view
// Textures are not directly accessed by the shaders and
// are abstracted by image views containing additional
// information and sub resource ranges
VkImageViewCreateInfo viewCreateInfo = VkImageViewCreateInfo.New();
viewCreateInfo.viewType = VkImageViewType._2d;
viewCreateInfo.format = format;
viewCreateInfo.components = new VkComponentMapping {
r = VkComponentSwizzle.R, g = VkComponentSwizzle.G, b = VkComponentSwizzle.B, a = VkComponentSwizzle.A
};
viewCreateInfo.subresourceRange = new VkImageSubresourceRange {
aspectMask = VkImageAspectFlags.Color, baseMipLevel = 0, levelCount = 1, baseArrayLayer = 0, layerCount = 1
};
// Linear tiling usually won't support mip maps
// Only set mip map count if optimal tiling is used
viewCreateInfo.subresourceRange.levelCount = (useStaging) ? mipLevels : 1;
viewCreateInfo.image = image;
Util.CheckResult(vkCreateImageView(device.LogicalDevice, &viewCreateInfo, null, out view));
// Update descriptor image info member that can be used for setting up descriptor sets
updateDescriptor();
}
/**
* Loads a 3D model from a file into Vulkan buffers
*
* @param device Pointer to the Vulkan device used to generated the vertex and index buffers on
* @param filename File to load (must be a model format supported by ASSIMP)
* @param layout Vertex layout components (position, normals, tangents, etc.)
* @param createInfo MeshCreateInfo structure for load time settings like scale, center, etc.
* @param copyQueue Queue used for the memory staging copy commands (must support transfer)
* @param (Optional) flags ASSIMP model loading flags
*/
//public bool loadFromFile(string filename, vksVertexLayout layout, vksModelCreateInfo* createInfo, vksVulkanDevice device, VkQueue copyQueue, int flags)
//{
// this.device = device.LogicalDevice;
// ObjFile objFile;
// using (var fs = File.OpenRead(filename))
// {
// objFile = new ObjParser().Parse(fs);
// }
// string mtlFilename = Path.ChangeExtension(filename, "mtl");
// MtlFile mtlFile;
// using (var fs = File.OpenRead(mtlFilename))
// {
// mtlFile = new MtlParser().Parse(fs);
// }
// if (objFile != null)
// {
// parts.Clear();
// parts.Resize((uint)objFile.MeshGroups.Length);
// Vector3 scale = new Vector3(1.0f);
// Vector2 uvscale = new Vector2(1.0f);
// Vector3 center = new Vector3(0.0f);
// if (createInfo != null)
// {
// scale = createInfo->Scale;
// uvscale = createInfo->UVScale;
// center = createInfo->Center;
// }
// NativeList<float> vertexBuffer = new NativeList<float>();
// NativeList<uint> indexBuffer = new NativeList<uint>();
// vertexCount = 0;
// indexCount = 0;
// // Load meshes
// parts.Count = (uint)objFile.MeshGroups.Length;
// for (uint i = 0; i < objFile.MeshGroups.Length; i++)
// {
// ConstructedMeshInfo mesh = objFile.GetMesh(objFile.MeshGroups[i]);
// parts[i] = new ModelPart();
// parts[i].vertexBase = vertexCount;
// parts[i].indexBase = indexCount;
// vertexCount += (uint)mesh.Vertices.Length;
// var material = mtlFile.Definitions[objFile.MeshGroups[i].Material];
// Vector3 pColor = material.DiffuseReflectivity;
// Vector3 Zero3D = Vector3.Zero;
// for (uint j = 0; j < mesh.Vertices.Length; j++)
// {
// VertexPositionNormalTexture vertex = mesh.Vertices[j];
// Vector3* pPos = &vertex.Position;
// Vector3* pNormal = &vertex.Normal;
// Vector2* pTexCoord = &vertex.TextureCoordinates;
// Vector3* pTangent = &Zero3D;
// Vector3* pBiTangent = &Zero3D;
// /*
// const aiVector3D* pPos = &(paiMesh->mVertices[j]);
// const aiVector3D* pNormal = &(paiMesh->mNormals[j]);
// const aiVector3D* pTexCoord = (paiMesh->HasTextureCoords(0)) ? &(paiMesh->mTextureCoords[0][j]) : &Zero3D;
// const aiVector3D* pTangent = (paiMesh->HasTangentsAndBitangents()) ? &(paiMesh->mTangents[j]) : &Zero3D;
// const aiVector3D* pBiTangent = (paiMesh->HasTangentsAndBitangents()) ? &(paiMesh->mBitangents[j]) : &Zero3D;
// */
// foreach (var component in layout.Components)
// {
// switch (component)
// {
// case VertexComponent.VERTEX_COMPONENT_POSITION:
// vertexBuffer.Add(pPos.X * scale.X + center.X);
// vertexBuffer.Add(-pPos.Y * scale.Y + center.Y);
// vertexBuffer.Add(pPos.Z * scale.Z + center.Z);
// break;
// case VertexComponent.VERTEX_COMPONENT_NORMAL:
// vertexBuffer.Add(pNormal.X);
// vertexBuffer.Add(-pNormal.Y);
// vertexBuffer.Add(pNormal.Z);
// break;
// case VertexComponent.VERTEX_COMPONENT_UV:
// vertexBuffer.Add(pTexCoord.X * uvscale.X);
// vertexBuffer.Add(pTexCoord.Y * uvscale.Y);
// break;
// case VertexComponent.VERTEX_COMPONENT_COLOR:
// vertexBuffer.Add(pColor.X);
// vertexBuffer.Add(pColor.Y);
// vertexBuffer.Add(pColor.Z);
// break;
// case VertexComponent.VERTEX_COMPONENT_TANGENT:
// vertexBuffer.Add(pTangent.X);
// vertexBuffer.Add(pTangent.Y);
// vertexBuffer.Add(pTangent.Z);
// break;
// case VertexComponent.VERTEX_COMPONENT_BITANGENT:
// vertexBuffer.Add(pBiTangent.X);
// vertexBuffer.Add(pBiTangent.Y);
// vertexBuffer.Add(pBiTangent.Z);
// break;
// // Dummy components for padding
// case VertexComponent.VERTEX_COMPONENT_DUMMY_FLOAT:
// vertexBuffer.Add(0.0f);
// break;
// case VertexComponent.VERTEX_COMPONENT_DUMMY_VEC4:
// vertexBuffer.Add(0.0f);
// vertexBuffer.Add(0.0f);
// vertexBuffer.Add(0.0f);
// vertexBuffer.Add(0.0f);
// break;
// };
// }
// dim.Max.X = Math.Max(pPos.X, dim.Max.X);
// dim.Max.Y = Math.Max(pPos.Y, dim.Max.Y);
// dim.Max.Z = Math.Max(pPos.Z, dim.Max.Z);
// dim.Min.X = Math.Min(pPos.X, dim.Min.X);
// dim.Min.Y = Math.Min(pPos.Y, dim.Min.Y);
// dim.Min.Z = Math.Min(pPos.Z, dim.Min.Z);
// }
// dim.Size = dim.Max - dim.Min;
// parts[i].vertexCount = (uint)mesh.Vertices.Length;
// uint indexBase = indexBuffer.Count;
// foreach (var index in mesh.Indices)
// {
// indexBuffer.Add(index);
// }
// indexCount += (uint)mesh.Indices.Length;
// parts[i].indexCount += (uint)mesh.Indices.Length;
// /*
// for (uint j = 0; j < paiMesh->mNumFaces; j++)
// {
// const aiFace&Face = paiMesh->mFaces[j];
// if (Face.mNumIndices != 3)
// continue;
// indexBuffer.Add(indexBase + Face.mIndices[0]);
// indexBuffer.Add(indexBase + Face.mIndices[1]);
// indexBuffer.Add(indexBase + Face.mIndices[2]);
// parts[i].indexCount += 3;
// indexCount += 3;
// }
// */
// }
// uint vBufferSize = vertexBuffer.Count * sizeof(float);
// uint iBufferSize = indexBuffer.Count * sizeof(uint);
// // Use staging buffer to move vertex and index buffer to device local memory
// // Create staging buffers
// vksBuffer vertexStaging = new vksBuffer();
// vksBuffer indexStaging = new vksBuffer();
// // Vertex buffer
// Util.CheckResult(device.createBuffer(
// VkBufferUsageFlags.TransferSrc,
// VkMemoryPropertyFlags.HostVisible,
// vertexStaging,
// vBufferSize,
// vertexBuffer.Data.ToPointer()));
// // Index buffer
// Util.CheckResult(device.createBuffer(
// VkBufferUsageFlags.TransferSrc,
// VkMemoryPropertyFlags.HostVisible,
// indexStaging,
// iBufferSize,
// indexBuffer.Data.ToPointer()));
// // Create device local target buffers
// // Vertex buffer
// Util.CheckResult(device.createBuffer(
// VkBufferUsageFlags.VertexBuffer | VkBufferUsageFlags.TransferDst,
// VkMemoryPropertyFlags.DeviceLocal,
// vertices,
// vBufferSize));
// // Index buffer
// Util.CheckResult(device.createBuffer(
// VkBufferUsageFlags.IndexBuffer | VkBufferUsageFlags.TransferDst,
// VkMemoryPropertyFlags.DeviceLocal,
// indices,
// iBufferSize));
// // Copy from staging buffers
// VkCommandBuffer copyCmd = device.createCommandBuffer(VkCommandBufferLevel.Primary, true);
// VkBufferCopy copyRegion = new VkBufferCopy();
// copyRegion.size = vertices.size;
// vkCmdCopyBuffer(copyCmd, vertexStaging.buffer, vertices.buffer, 1, ©Region);
// copyRegion.size = indices.size;
// vkCmdCopyBuffer(copyCmd, indexStaging.buffer, indices.buffer, 1, ©Region);
// device.flushCommandBuffer(copyCmd, copyQueue);
// // Destroy staging resources
// vkDestroyBuffer(device.LogicalDevice, vertexStaging.buffer, null);
// vkFreeMemory(device.LogicalDevice, vertexStaging.memory, null);
// vkDestroyBuffer(device.LogicalDevice, indexStaging.buffer, null);
// vkFreeMemory(device.LogicalDevice, indexStaging.memory, null);
// return true;
// }
// else
// {
// Console.WriteLine("Error loading file.");
// return false;
// }
//}
/**
* Loads a 3D model from a file into Vulkan buffers
*
* @param device Pointer to the Vulkan device used to generated the vertex and index buffers on
* @param filename File to load (must be a model format supported by ASSIMP)
* @param layout Vertex layout components (position, normals, tangents, etc.)
* @param createInfo MeshCreateInfo structure for load time settings like scale, center, etc.
* @param copyQueue Queue used for the memory staging copy commands (must support transfer)
* @param (Optional) flags ASSIMP model loading flags
*/
bool loadFromFile(string filename, vksVertexLayout layout, vksModelCreateInfo *createInfo, vksVulkanDevice device, VkQueue copyQueue, PostProcessSteps flags = DefaultPostProcessSteps)
{
this.device = device.LogicalDevice;
// Load file
var assimpContext = new AssimpContext();
var pScene = assimpContext.ImportFile(filename, flags);
parts.Clear();
parts.Count = (uint)pScene.Meshes.Count;
Vector3 scale = new Vector3(1.0f);
Vector2 uvscale = new Vector2(1.0f);
Vector3 center = new Vector3(0.0f);
if (createInfo != null)
{
scale = createInfo->Scale;
uvscale = createInfo->UVScale;
center = createInfo->Center;
}
NativeList <float> vertexBuffer = new NativeList <float>();
NativeList <uint> indexBuffer = new NativeList <uint>();
vertexCount = 0;
indexCount = 0;
// Load meshes
for (int i = 0; i < pScene.Meshes.Count; i++)
{
var paiMesh = pScene.Meshes[i];
parts[i] = new ModelPart();
parts[i].vertexBase = vertexCount;
parts[i].indexBase = indexCount;
vertexCount += (uint)paiMesh.VertexCount;
var pColor = pScene.Materials[paiMesh.MaterialIndex].ColorDiffuse;
Vector3D Zero3D = new Vector3D(0.0f, 0.0f, 0.0f);
for (int j = 0; j < paiMesh.VertexCount; j++)
{
Vector3D pPos = paiMesh.Vertices[j];
Vector3D pNormal = paiMesh.Normals[j];
Vector3D pTexCoord = paiMesh.HasTextureCoords(0) ? paiMesh.TextureCoordinateChannels[0][j] : Zero3D;
Vector3D pTangent = paiMesh.HasTangentBasis ? paiMesh.Tangents[j] : Zero3D;
Vector3D pBiTangent = paiMesh.HasTangentBasis ? paiMesh.BiTangents[j] : Zero3D;
foreach (var component in layout.Components)
{
switch (component)
{
case VertexComponent.VERTEX_COMPONENT_POSITION:
vertexBuffer.Add(pPos.X * scale.X + center.X);
vertexBuffer.Add(-pPos.Y * scale.Y + center.Y);
vertexBuffer.Add(pPos.Z * scale.Z + center.Z);
break;
case VertexComponent.VERTEX_COMPONENT_NORMAL:
vertexBuffer.Add(pNormal.X);
vertexBuffer.Add(-pNormal.Y);
vertexBuffer.Add(pNormal.Z);
break;
case VertexComponent.VERTEX_COMPONENT_UV:
vertexBuffer.Add(pTexCoord.X * uvscale.X);
vertexBuffer.Add(pTexCoord.Y * uvscale.Y);
break;
case VertexComponent.VERTEX_COMPONENT_COLOR:
vertexBuffer.Add(pColor.R);
vertexBuffer.Add(pColor.G);
vertexBuffer.Add(pColor.B);
break;
case VertexComponent.VERTEX_COMPONENT_TANGENT:
vertexBuffer.Add(pTangent.X);
vertexBuffer.Add(pTangent.Y);
vertexBuffer.Add(pTangent.Z);
break;
case VertexComponent.VERTEX_COMPONENT_BITANGENT:
vertexBuffer.Add(pBiTangent.X);
vertexBuffer.Add(pBiTangent.Y);
vertexBuffer.Add(pBiTangent.Z);
break;
// Dummy components for padding
case VertexComponent.VERTEX_COMPONENT_DUMMY_FLOAT:
vertexBuffer.Add(0.0f);
break;
case VertexComponent.VERTEX_COMPONENT_DUMMY_VEC4:
vertexBuffer.Add(0.0f);
vertexBuffer.Add(0.0f);
vertexBuffer.Add(0.0f);
vertexBuffer.Add(0.0f);
break;
}
;
}
dim.Max.X = (float)Math.Max(pPos.X, dim.Max.X);
dim.Max.Y = (float)Math.Max(pPos.Y, dim.Max.Y);
dim.Max.Z = (float)Math.Max(pPos.Z, dim.Max.Z);
dim.Min.X = (float)Math.Min(pPos.X, dim.Min.X);
dim.Min.Y = (float)Math.Min(pPos.Y, dim.Min.Y);
dim.Min.Z = (float)Math.Min(pPos.Z, dim.Min.Z);
}
dim.Size = dim.Max - dim.Min;
parts[i].vertexCount = (uint)paiMesh.VertexCount;
uint indexBase = indexBuffer.Count;
for (uint j = 0; j < paiMesh.FaceCount; j++)
{
var Face = paiMesh.Faces[(int)j];
if (Face.IndexCount != 3)
{
continue;
}
indexBuffer.Add(indexBase + (uint)Face.Indices[0]);
indexBuffer.Add(indexBase + (uint)Face.Indices[1]);
indexBuffer.Add(indexBase + (uint)Face.Indices[2]);
parts[i].indexCount += 3;
indexCount += 3;
}
}
uint vBufferSize = (vertexBuffer.Count) * sizeof(float);
uint iBufferSize = (indexBuffer.Count) * sizeof(uint);
// Use staging buffer to move vertex and index buffer to device local memory
// Create staging buffers
vksBuffer vertexStaging = new vksBuffer();
vksBuffer indexStaging = new vksBuffer();
// Vertex buffer
Util.CheckResult(device.createBuffer(
VkBufferUsageFlags.TransferSrc,
VkMemoryPropertyFlags.HostVisible,
vertexStaging,
vBufferSize,
vertexBuffer.Data.ToPointer()));
// Index buffer
Util.CheckResult(device.createBuffer(
VkBufferUsageFlags.TransferSrc,
VkMemoryPropertyFlags.HostVisible,
indexStaging,
iBufferSize,
indexBuffer.Data.ToPointer()));
// Create device local target buffers
// Vertex buffer
Util.CheckResult(device.createBuffer(
VkBufferUsageFlags.VertexBuffer | VkBufferUsageFlags.TransferDst,
VkMemoryPropertyFlags.DeviceLocal,
vertices,
vBufferSize));
// Index buffer
Util.CheckResult(device.createBuffer(
VkBufferUsageFlags.IndexBuffer | VkBufferUsageFlags.TransferDst,
VkMemoryPropertyFlags.DeviceLocal,
indices,
iBufferSize));
// Copy from staging buffers
VkCommandBuffer copyCmd = device.createCommandBuffer(VkCommandBufferLevel.Primary, true);
VkBufferCopy copyRegion = new VkBufferCopy();
copyRegion.size = vertices.size;
vkCmdCopyBuffer(copyCmd, vertexStaging.buffer, vertices.buffer, 1, ©Region);
copyRegion.size = indices.size;
vkCmdCopyBuffer(copyCmd, indexStaging.buffer, indices.buffer, 1, ©Region);
device.flushCommandBuffer(copyCmd, copyQueue);
// Destroy staging resources
vkDestroyBuffer(device.LogicalDevice, vertexStaging.buffer, null);
vkFreeMemory(device.LogicalDevice, vertexStaging.memory, null);
vkDestroyBuffer(device.LogicalDevice, indexStaging.buffer, null);
vkFreeMemory(device.LogicalDevice, indexStaging.memory, null);
return(true);
}
