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fix: Vulkan projection matrix — Y-flip + depth [0,1] remap

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- Negate proj.M22 for Vulkan Y-down coordinate system
- Remap depth from OpenGL [-1,1] to Vulkan [0,1]: M33*0.5+0.5, M43*0.5+0.5
- FOV 45°, camera z=-5, cubes at x=±2
- 0 validation errors
This commit is contained in:
emil28092005
2026-06-18 13:25:59 +03:00
parent ce3dc8c41b
commit a801e7fb16
1 changed files with 7 additions and 4 deletions
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src/Engine.Graphics.Vulkan/VulkanRenderer.cs
+7 -4
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@@ -191,11 +191,11 @@ internal sealed unsafe class VulkanRenderer : IRenderer, Engine.Graphics.IScreen
var angle = _totalTime * 0.2f; var angle = _totalTime * 0.2f;
var rot = Matrix4x4.CreateRotationY(angle); var rot = Matrix4x4.CreateRotationY(angle);
var model1 = Matrix4x4.CreateTranslation(-3f, 0, 0) * rot; var model1 = Matrix4x4.CreateTranslation(-2f, 0, 0) * rot;
Vk.vkCmdPushConstants(cmd, _pipeline.PipelineLayout, VkShaderStageFlags.Vertex, 0, 64, &model1); Vk.vkCmdPushConstants(cmd, _pipeline.PipelineLayout, VkShaderStageFlags.Vertex, 0, 64, &model1);
Vk.vkCmdDrawIndexed(cmd, _indexCount, 1, 0, 0, 0); Vk.vkCmdDrawIndexed(cmd, _indexCount, 1, 0, 0, 0);
var model2 = Matrix4x4.CreateTranslation(3f, 0, 0) * rot; var model2 = Matrix4x4.CreateTranslation(2f, 0, 0) * rot;
Vk.vkCmdPushConstants(cmd, _pipeline.PipelineLayout, VkShaderStageFlags.Vertex, 0, 64, &model2); Vk.vkCmdPushConstants(cmd, _pipeline.PipelineLayout, VkShaderStageFlags.Vertex, 0, 64, &model2);
Vk.vkCmdDrawIndexed(cmd, _indexCount, 1, 0, 0, 0); Vk.vkCmdDrawIndexed(cmd, _indexCount, 1, 0, 0, 0);
@@ -271,8 +271,11 @@ internal sealed unsafe class VulkanRenderer : IRenderer, Engine.Graphics.IScreen
private Matrix4x4 ComputeViewProjection() private Matrix4x4 ComputeViewProjection()
{ {
var aspect = (float)_swapchain.Extent.Width / (float)_swapchain.Extent.Height; var aspect = (float)_swapchain.Extent.Width / (float)_swapchain.Extent.Height;
var proj = Matrix4x4.CreatePerspectiveFieldOfView(MathF.PI * 0.4f, aspect, 0.1f, 100f); var proj = Matrix4x4.CreatePerspectiveFieldOfView(MathF.PI / 4f, aspect, 0.1f, 100f);
var view = Matrix4x4.CreateLookAt(new Vector3(0, 0, -10), Vector3.Zero, Vector3.UnitY); proj.M22 *= -1;
proj.M33 = proj.M33 * 0.5f + 0.5f;
proj.M43 = proj.M43 * 0.5f + 0.5f;
var view = Matrix4x4.CreateLookAt(new Vector3(0, 0, -5), Vector3.Zero, Vector3.UnitY);
return view * proj; return view * proj;
} }