Emil_Shanaty/Cortex_Engine
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feat: ECS scene with 7 objects — torus knot + 6 rotating cubes

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- VulkanRenderer: mesh cache by entity ID, lazy buffer creation
- RenderWorld iterates entities with Transform+Mesh, draws each with
  per-entity model matrix via push constants
- Program.cs: creates scene with 1 torus knot (center, scale 1.5) +
  6 cubes at different positions, all rotating around Y at different speeds
- Camera at (0, 2, -8) looking at origin, FreeFly controls
- 0 validation errors, ~2100 FPS with 7 objects
This commit is contained in:
emil28092005
2026-06-18 17:00:14 +03:00
parent 398cc88ae2
commit a4914f28c5
2 changed files with 108 additions and 45 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/CortexEngine.App/Program.cs
+68 -2
View File
@@ -2,6 +2,7 @@ using System.Numerics;
using Engine.Core;
using Engine.Core.Components;
using Engine.Graphics;
using Engine.Graphics.Loaders;
using Engine.Graphics.Vulkan;
using Flecs.NET.Core;
@@ -11,7 +12,7 @@ class Program
{
static async Task Main(string[] args)
{
Console.WriteLine("Cortex Engine — Vulkan (pure P/Invoke)...");
Console.WriteLine("Cortex Engine — Vulkan ECS Scene (pure P/Invoke)...");
try
{
@@ -25,7 +26,7 @@ class Program
var cameraEntity = world.Entity("Camera")
.Set(new Camera(
new Vector3(0, 0, -6),
new Vector3(0, 2, -8),
new Vector3(0, 0, 0),
Vector3.UnitY,
MathF.PI / 4f,
@@ -36,11 +37,38 @@ class Program
var cameraController = new FreeFlyCameraController(cameraEntity);
Console.WriteLine("Camera: FreeFly (WASD + right-click mouse look, Q/E up/down, Shift boost)");
var torusKnot = LoadMesh("Content/torusknot.obj", new Vector3(0.8f, 0.6f, 0.3f));
var cube = LoadMesh("Content/cube.obj", new Vector3(0.5f, 0.7f, 0.9f));
world.Entity("TorusKnot")
.Set(new Transform(Vector3.Zero, Quaternion.Identity, new Vector3(1.5f)))
.Set(torusKnot);
var cubePositions = new Vector3[]
{
new(-4, 0, 0),
new(4, 0, 0),
new(0, -3, 0),
new(0, 3, 0),
new(-3, 2, 3),
new(3, -2, -3),
};
for (var i = 0; i < cubePositions.Length; i++)
{
world.Entity($"Cube{i}")
.Set(new Transform(cubePositions[i], Quaternion.Identity, new Vector3(1.5f)))
.Set(cube);
}
Console.WriteLine($"[Scene] 1 torus knot + {cubePositions.Length} cubes");
var lastWidth = window.Width;
var lastHeight = window.Height;
var frames = 0;
var lastFpsTime = 0.0;
var timing = new Timing();
var totalTime = 0.0f;
while (!window.ShouldClose)
{
@@ -60,6 +88,28 @@ class Program
cameraController.Update(input, (float)timing.DeltaTime);
totalTime += (float)timing.DeltaTime;
var angle = totalTime * 0.3f;
var torusEntity = world.Lookup("TorusKnot");
if ((ulong)torusEntity.Id != 0)
{
var t = torusEntity.Get<Transform>();
t.Rotation = Quaternion.CreateFromAxisAngle(Vector3.UnitY, angle);
torusEntity.Set(t);
}
for (var i = 0; i < cubePositions.Length; i++)
{
var cubeEntity = world.Lookup($"Cube{i}");
if ((ulong)cubeEntity.Id != 0)
{
var t = cubeEntity.Get<Transform>();
t.Rotation = Quaternion.CreateFromAxisAngle(Vector3.UnitY, angle * (1f + i * 0.2f));
cubeEntity.Set(t);
}
}
renderer.RenderWorld(world);
frames++;
@@ -81,4 +131,20 @@ class Program
await Task.CompletedTask;
}
static Mesh LoadMesh(string path, Vector3 color)
{
if (!File.Exists(path))
{
var altPath = Path.Combine(AppContext.BaseDirectory, path);
if (!File.Exists(altPath))
{
altPath = Path.Combine(AppContext.BaseDirectory, "Content", Path.GetFileName(path));
if (!File.Exists(altPath))
throw new FileNotFoundException($"Mesh file not found: {path}");
}
return ObjLoader.Load(altPath, color);
}
return ObjLoader.Load(path, color);
}
}
src/Engine.Graphics.Vulkan/VulkanRenderer.cs
+38 -41
View File
@@ -13,9 +13,8 @@ internal sealed unsafe class VulkanRenderer : IRenderer, Engine.Graphics.IScreen
private readonly VulkanSwapchain _swapchain;
private readonly VulkanPipeline _pipeline;
private readonly VulkanFrameResources _frameResources;
private readonly VulkanVertexBuffer _vertexBuffer;
private readonly VulkanIndexBuffer _indexBuffer;
private readonly uint _indexCount;
private readonly Dictionary<ulong, (VulkanVertexBuffer vb, VulkanIndexBuffer ib, uint indexCount)> _meshCache = new();
private int _frameIndex;
private bool _disposed;
@@ -38,15 +37,6 @@ internal sealed unsafe class VulkanRenderer : IRenderer, Engine.Graphics.IScreen
_frameResources = new VulkanFrameResources(ctx.Device, ctx.GraphicsQueueFamilyIndex,
swapchain.ImageCount, ctx, _pipeline.DescriptorSetLayout);
var mesh = LoadMesh("Content/torusknot.obj");
_indexCount = (uint)mesh.Indices.Length;
_vertexBuffer = new VulkanVertexBuffer(ctx.Device, ctx.PhysicalDevice,
_frameResources.CommandPool, ctx.GraphicsQueue, ctx, mesh.Vertices);
_indexBuffer = new VulkanIndexBuffer(ctx.Device, _frameResources.CommandPool,
ctx.GraphicsQueue, ctx, mesh.Indices);
}
public void RenderWorld(World world)
@@ -71,10 +61,28 @@ internal sealed unsafe class VulkanRenderer : IRenderer, Engine.Graphics.IScreen
vp = Matrix4x4.CreateLookAt(new Vector3(0, 0, -6), Vector3.Zero, Vector3.UnitY) * proj;
}
Render(vp);
var drawCalls = new List<(VkBuffer vertexBuf, VkBuffer indexBuf, uint indexCount, Matrix4x4 model)>();
world.Each((Entity e, ref Transform t, ref Mesh m) =>
{
var eid = (ulong)e.Id;
if (!_meshCache.TryGetValue(eid, out var entry))
{
var vb = new VulkanVertexBuffer(_ctx.Device, _ctx.PhysicalDevice,
_frameResources.CommandPool, _ctx.GraphicsQueue, _ctx, m.Vertices);
var ib = new VulkanIndexBuffer(_ctx.Device, _frameResources.CommandPool,
_ctx.GraphicsQueue, _ctx, m.Indices);
entry = (vb, ib, (uint)m.Indices.Length);
_meshCache[eid] = entry;
}
private void Render(Matrix4x4 vp)
drawCalls.Add((entry.vb.Buffer, entry.ib.Buffer, entry.indexCount, t.GetMatrix()));
});
Render(vp, drawCalls);
}
private void Render(Matrix4x4 vp, List<(VkBuffer vertexBuf, VkBuffer indexBuf, uint indexCount, Matrix4x4 model)> drawCalls)
{
_frameResources.WaitFrame(_frameIndex);
@@ -86,7 +94,7 @@ internal sealed unsafe class VulkanRenderer : IRenderer, Engine.Graphics.IScreen
{
_swapchain.Recreate(_ctx.SurfaceExtent.Width == 0 ? 1280 : (int)_ctx.SurfaceExtent.Width,
_ctx.SurfaceExtent.Height == 0 ? 720 : (int)_ctx.SurfaceExtent.Height);
Render(vp);
Render(vp, drawCalls);
return;
}
@@ -185,17 +193,17 @@ internal sealed unsafe class VulkanRenderer : IRenderer, Engine.Graphics.IScreen
Vk.vkCmdBindDescriptorSets(cmd, VkPipelineBindPoint.Graphics, _pipeline.PipelineLayout,
0, 1, &descSet, 0, null);
var bufferHandle = _vertexBuffer.Buffer;
foreach (var dc in drawCalls)
{
var vertexBuf = dc.vertexBuf;
ulong offset = 0;
Vk.vkCmdBindVertexBuffers(cmd, 0, 1, &bufferHandle, &offset);
Vk.vkCmdBindVertexBuffers(cmd, 0, 1, &vertexBuf, &offset);
Vk.vkCmdBindIndexBuffer(cmd, dc.indexBuf, 0, 1);
Vk.vkCmdBindIndexBuffer(cmd, _indexBuffer.Buffer, 0, 1);
var angle = _totalTime * 0.2f;
var rot = Matrix4x4.CreateRotationY(angle);
var model = rot;
var model = dc.model;
Vk.vkCmdPushConstants(cmd, _pipeline.PipelineLayout, VkShaderStageFlags.Vertex, 0, 64, &model);
Vk.vkCmdDrawIndexed(cmd, _indexCount, 1, 0, 0, 0);
Vk.vkCmdDrawIndexed(cmd, dc.indexCount, 1, 0, 0, 0);
}
Vk.vkCmdEndRendering(cmd);
@@ -332,22 +340,6 @@ internal sealed unsafe class VulkanRenderer : IRenderer, Engine.Graphics.IScreen
Vk.vkCmdPipelineBarrier2(cmd, &depInfo);
}
private static Mesh LoadMesh(string path)
{
if (!File.Exists(path))
{
var altPath = Path.Combine(AppContext.BaseDirectory, path);
if (!File.Exists(altPath))
{
altPath = Path.Combine(AppContext.BaseDirectory, "Content", Path.GetFileName(path));
if (!File.Exists(altPath))
throw new FileNotFoundException($"Mesh file not found: {path}");
}
return ObjLoader.Load(altPath, new Vector3(0.8f, 0.6f, 0.3f));
}
return ObjLoader.Load(path, new Vector3(0.8f, 0.6f, 0.3f));
}
private static byte[] LoadShader(string path)
{
if (!File.Exists(path))
@@ -390,8 +382,13 @@ internal sealed unsafe class VulkanRenderer : IRenderer, Engine.Graphics.IScreen
Vk.vkDeviceWaitIdle(_ctx.Device);
_vertexBuffer?.Dispose();
_indexBuffer?.Dispose();
foreach (var (vb, ib, _) in _meshCache.Values)
{
vb.Dispose();
ib.Dispose();
}
_meshCache.Clear();
_frameResources?.Dispose();
_pipeline?.Dispose();
}