Emil_Shanaty/Cortex_Engine
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feat: push constants + UBO descriptor sets — rotating triangle with VP matrix

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- Push constants: rotation angle (float) sent to vertex shader via vkCmdPushConstants
- UBO + descriptor sets: VP matrix (mat4) in uniform buffer, bound via VkDescriptorSet
- New Vulkan functions: vkCreateDescriptorSetLayout, vkCreateDescriptorPool,
  vkAllocateDescriptorSets, vkUpdateDescriptorSets, vkCmdBindDescriptorSets,
  vkCmdPushConstants
- New structs: VkPushConstantRange, VkDescriptorSetLayoutBinding,
  VkDescriptorSetLayoutCreateInfo, VkDescriptorPoolCreateInfo,
  VkDescriptorPoolSize, VkDescriptorSetAllocateInfo, VkWriteDescriptorSet,
  VkDescriptorBufferInfo
- Per-frame UBO buffers (HOST_VISIBLE|HOST_COHERENT, 64 bytes each)
- Perspective projection + look-at camera (static, no ECS yet)
- Cleaned up debug logging in VulkanContext
- Zero validation errors
This commit is contained in:
emil28092005
2026-06-18 01:59:41 +03:00
parent 2e0970e769
commit 4f3810010a
9 changed files with 328 additions and 16 deletions
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src/Engine.Graphics.Vulkan/VulkanRenderer.cs
+23 -1
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@@ -18,6 +18,7 @@ internal sealed unsafe class VulkanRenderer : IRenderer, Engine.Graphics.IScreen
private bool _disposed;
private bool _screenshotRequested;
private string? _screenshotPath;
private float _totalTime;
public bool IsScreenshotRequested => _screenshotRequested;
public IScreenshotProvider ScreenshotProvider => this;
@@ -32,7 +33,8 @@ internal sealed unsafe class VulkanRenderer : IRenderer, Engine.Graphics.IScreen
_pipeline = new VulkanPipeline(ctx.Device, swapchain.Format, vertSpv, fragSpv);
_frameResources = new VulkanFrameResources(ctx.Device, ctx.GraphicsQueueFamilyIndex, swapchain.ImageCount);
_frameResources = new VulkanFrameResources(ctx.Device, ctx.GraphicsQueueFamilyIndex,
swapchain.ImageCount, ctx, _pipeline.DescriptorSetLayout);
var vertices = new Vertex[]
{
@@ -69,6 +71,11 @@ internal sealed unsafe class VulkanRenderer : IRenderer, Engine.Graphics.IScreen
if (acquireResult != VkResult.Success)
throw new InvalidOperationException($"vkAcquireNextImageKHR failed: {acquireResult}");
_totalTime += 0.016f;
var vp = ComputeViewProjection();
_frameResources.UpdateUbo(_frameIndex, &vp, VulkanFrameResources.UboSize);
var cmd = _frameResources.CommandBuffers[_frameIndex];
Vk.vkResetCommandBuffer(cmd, 0);
@@ -132,10 +139,17 @@ internal sealed unsafe class VulkanRenderer : IRenderer, Engine.Graphics.IScreen
};
Vk.vkCmdSetScissor(cmd, 0, 1, &scissor);
var descSet = _frameResources.DescriptorSets[_frameIndex];
Vk.vkCmdBindDescriptorSets(cmd, VkPipelineBindPoint.Graphics, _pipeline.PipelineLayout,
0, 1, &descSet, 0, null);
var bufferHandle = _vertexBuffer.Buffer;
ulong offset = 0;
Vk.vkCmdBindVertexBuffers(cmd, 0, 1, &bufferHandle, &offset);
var angle = _totalTime;
Vk.vkCmdPushConstants(cmd, _pipeline.PipelineLayout, VkShaderStageFlags.Vertex, 0, 4, &angle);
Vk.vkCmdDraw(cmd, 3, 1, 0, 0);
Vk.vkCmdEndRendering(cmd);
@@ -207,6 +221,14 @@ internal sealed unsafe class VulkanRenderer : IRenderer, Engine.Graphics.IScreen
_frameIndex = (_frameIndex + 1) % VulkanFrameResources.MaxFramesInFlight;
}
private Matrix4x4 ComputeViewProjection()
{
var aspect = (float)_swapchain.Extent.Width / (float)_swapchain.Extent.Height;
var proj = Matrix4x4.CreatePerspectiveFieldOfView(MathF.PI / 4f, aspect, 0.1f, 100f);
var view = Matrix4x4.CreateLookAt(new Vector3(0, 0, -2), Vector3.Zero, Vector3.UnitY);
return view * proj;
}
private static void TransitionImageLayout(VkCommandBuffer cmd, VkImage image,
VkImageLayout oldLayout, VkImageLayout newLayout,
ulong srcStage, ulong srcAccess,