Emil_Shanaty/Cortex_Engine
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feat: ImGui shadow parameters panel with clipboard copy

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- Push constant block expanded: 160B → 176B (added vec4 shadowParams)
- shadowParams: x=bias, y=sampleRadius, z=farPlane, w=unused
- Fragment shader: bias and sampleRadius now read from push constants
  (dynamic, adjustable at runtime)
- Shadow.frag: uses pc.shadowParams.z for farPlane (dynamic)
- Slope-dependent bias: bias + bias*2*(1-NdotL) — adaptive
- VulkanRenderer: public ShadowBias, ShadowSampleRadius, ShadowFarPlane properties
- Program.cs: ImGui 'Shadow Parameters' panel with sliders:
  - Light Intensity (0-100), Range (5-100), RGB color
  - Shadow Bias (0.001-0.5), Sample Radius (0.001-0.1), Far Plane (10-120)
  - 'Copy Parameters to Clipboard' button — outputs all values as text
- 227 tests, all pass
This commit is contained in:
emil28092005
2026-06-18 21:48:38 +03:00
parent 8918126c58
commit 29a58d204b
13 changed files with 92 additions and 17 deletions
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src/Engine.Graphics.Vulkan/VulkanRenderer.cs
+14 -6
View File
@@ -7,7 +7,7 @@ using System.Runtime.InteropServices;
namespace Engine.Graphics.Vulkan;
internal sealed unsafe class VulkanRenderer : IRenderer, Engine.Graphics.IScreenshotProvider
public sealed unsafe class VulkanRenderer : IRenderer, Engine.Graphics.IScreenshotProvider
{
private readonly VulkanContext _ctx;
private readonly VulkanSwapchain _swapchain;
@@ -24,10 +24,14 @@ internal sealed unsafe class VulkanRenderer : IRenderer, Engine.Graphics.IScreen
private string? _screenshotPath;
private float _totalTime;
public float ShadowBias { get; set; } = 0.08f;
public float ShadowSampleRadius { get; set; } = 0.015f;
public float ShadowFarPlane { get; set; } = 60.0f;
public bool IsScreenshotRequested => _screenshotRequested;
public IScreenshotProvider ScreenshotProvider => this;
public VulkanRenderer(VulkanContext ctx, VulkanSwapchain swapchain)
internal VulkanRenderer(VulkanContext ctx, VulkanSwapchain swapchain)
{
_ctx = ctx;
_swapchain = swapchain;
@@ -266,7 +270,7 @@ internal sealed unsafe class VulkanRenderer : IRenderer, Engine.Graphics.IScreen
Vk.vkCmdBindVertexBuffers(cmd, 0, 1, &vertexBuf, &offset);
Vk.vkCmdBindIndexBuffer(cmd, dc.indexBuf, 0, 1);
var pcData = stackalloc byte[160];
var pcData = stackalloc byte[176];
var modelCopy = dc.model;
System.Buffer.MemoryCopy(&modelCopy, pcData, 64, 64);
var lpCopy = lightPos;
@@ -275,8 +279,10 @@ internal sealed unsafe class VulkanRenderer : IRenderer, Engine.Graphics.IScreen
System.Buffer.MemoryCopy(&lcCopy, pcData + 80, 16, 16);
var lvpCopy = faceViewProj;
System.Buffer.MemoryCopy(&lvpCopy, pcData + 96, 64, 64);
var sp = new Vector4(ShadowBias, ShadowSampleRadius, ShadowFarPlane, 0);
System.Buffer.MemoryCopy(&sp, pcData + 160, 16, 16);
Vk.vkCmdPushConstants(cmd, _shadowMap.PipelineLayout, VkShaderStageFlags.Vertex | VkShaderStageFlags.Fragment, 0, 160, pcData);
Vk.vkCmdPushConstants(cmd, _shadowMap.PipelineLayout, VkShaderStageFlags.Vertex | VkShaderStageFlags.Fragment, 0, 176, pcData);
Vk.vkCmdDrawIndexed(cmd, dc.indexCount, 1, 0, 0, 0);
}
@@ -376,7 +382,7 @@ internal sealed unsafe class VulkanRenderer : IRenderer, Engine.Graphics.IScreen
Vk.vkCmdBindIndexBuffer(cmd, dc.indexBuf, 0, 1);
// Pack all push constants: model(64) + lightPos(16) + lightColor(16) + lightViewProj(64) = 160
var pcData = stackalloc byte[160];
var pcData = stackalloc byte[176];
var modelCopy = dc.model;
System.Buffer.MemoryCopy(&modelCopy, pcData, 64, 64);
var lpCopy = lightPos;
@@ -385,8 +391,10 @@ internal sealed unsafe class VulkanRenderer : IRenderer, Engine.Graphics.IScreen
System.Buffer.MemoryCopy(&lcCopy, pcData + 80, 16, 16);
var lvpCopy = lightViewProj;
System.Buffer.MemoryCopy(&lvpCopy, pcData + 96, 64, 64);
var sp = new Vector4(ShadowBias, ShadowSampleRadius, ShadowFarPlane, 0);
System.Buffer.MemoryCopy(&sp, pcData + 160, 16, 16);
Vk.vkCmdPushConstants(cmd, _pipeline.PipelineLayout, VkShaderStageFlags.Vertex | VkShaderStageFlags.Fragment, 0, 160, pcData);
Vk.vkCmdPushConstants(cmd, _pipeline.PipelineLayout, VkShaderStageFlags.Vertex | VkShaderStageFlags.Fragment, 0, 176, pcData);
Vk.vkCmdDrawIndexed(cmd, dc.indexCount, 1, 0, 0, 0);
}