1 files changed, 226 insertions, 0 deletions
diff --git a/src/tests/test_3d_render.cc b/src/tests/test_3d_render.cc
new file mode 100644
index 0000000..41bffe6
--- /dev/null
+++ b/src/tests/test_3d_render.cc
@@ -0,0 +1,226 @@
+// This file is part of the 64k demo project.
+// Standalone "mini-demo" for testing the 3D renderer.
+
+#include "3d/camera.h"
+#include "3d/object.h"
+#include "3d/renderer.h"
+#include "3d/scene.h"
+#include "platform.h"
+#include <iostream>
+#include <vector>
+#include <cmath>
+#include <cstring>
+
+#if defined(DEMO_CROSS_COMPILE_WIN32)
+#include <webgpu/webgpu.h>
+#else
+#include <webgpu.h>
+#endif
+
+// Global State
+static Renderer3D g_renderer;
+static Scene g_scene;
+static Camera g_camera;
+static WGPUDevice g_device = nullptr;
+static WGPUQueue g_queue = nullptr;
+static WGPUSurface g_surface = nullptr;
+static WGPUAdapter g_adapter = nullptr;
+static WGPUTextureFormat g_format = WGPUTextureFormat_Undefined;
+static int g_width = 1280;
+static int g_height = 720;
+
+// Reimplementing basic WebGPU init here
+void init_wgpu() {
+  WGPUInstance instance = wgpuCreateInstance(nullptr);
+  if (!instance) {
+      std::cerr << "Failed to create WGPU instance." << std::endl;
+      exit(1);
+  }
+  
+  g_surface = platform_create_wgpu_surface(instance);
+  if (!g_surface) {
+      std::cerr << "Failed to create WGPU surface." << std::endl;
+      exit(1);
+  }
+
+  WGPURequestAdapterOptions adapter_opts = {};
+  adapter_opts.compatibleSurface = g_surface;
+  adapter_opts.powerPreference = WGPUPowerPreference_HighPerformance;
+
+#if defined(DEMO_CROSS_COMPILE_WIN32)
+  auto on_adapter = [](WGPURequestAdapterStatus status, WGPUAdapter adapter,
+                       const char* message, void* userdata) {
+      if (status == WGPURequestAdapterStatus_Success) {
+          *(WGPUAdapter*)userdata = adapter;
+      } else {
+          std::cerr << "Adapter Error: " << (message ? message : "null") << std::endl;
+      }
+  };
+  wgpuInstanceRequestAdapter(instance, &adapter_opts, on_adapter, &g_adapter);
+#else
+  auto on_adapter = [](WGPURequestAdapterStatus status, WGPUAdapter adapter,
+                       WGPUStringView message, void* userdata, void* user2) {
+      if (status == WGPURequestAdapterStatus_Success) {
+          *(WGPUAdapter*)userdata = adapter;
+      } else {
+          std::cerr << "Adapter Error: " << (message.data ? message.data : "null") << std::endl;
+      }
+  };
+  WGPURequestAdapterCallbackInfo adapter_cb = {};
+  adapter_cb.mode = WGPUCallbackMode_WaitAnyOnly;
+  adapter_cb.callback = on_adapter;
+  adapter_cb.userdata1 = &g_adapter;
+  wgpuInstanceRequestAdapter(instance, &adapter_opts, adapter_cb);
+#endif
+
+  // Spin wait for adapter
+#if !defined(DEMO_CROSS_COMPILE_WIN32)
+  while (!g_adapter) {
+      wgpuInstanceProcessEvents(instance);
+  }
+#endif
+  
+  if (!g_adapter) {
+      std::cerr << "Failed to get adapter." << std::endl;
+      exit(1);
+  }
+
+  WGPUDeviceDescriptor device_desc = {};
+  
+#if defined(DEMO_CROSS_COMPILE_WIN32)
+  auto on_device = [](WGPURequestDeviceStatus status, WGPUDevice device,
+                      const char* message, void* userdata) {
+      if (status == WGPURequestDeviceStatus_Success) {
+          *(WGPUDevice*)userdata = device;
+      }
+  };
+  wgpuAdapterRequestDevice(g_adapter, &device_desc, on_device, &g_device);
+#else
+  auto on_device = [](WGPURequestDeviceStatus status, WGPUDevice device,
+                      WGPUStringView message, void* userdata, void* user2) {
+      if (status == WGPURequestDeviceStatus_Success) {
+          *(WGPUDevice*)userdata = device;
+      }
+  };
+  WGPURequestDeviceCallbackInfo device_cb = {};
+  device_cb.mode = WGPUCallbackMode_WaitAnyOnly;
+  device_cb.callback = on_device;
+  device_cb.userdata1 = &g_device;
+  wgpuAdapterRequestDevice(g_adapter, &device_desc, device_cb);
+#endif
+  
+#if !defined(DEMO_CROSS_COMPILE_WIN32)
+  // Poll until device is ready (WaitAny is unimplemented in current wgpu-native build)
+  while (!g_device) {
+      wgpuInstanceProcessEvents(instance);
+  }
+#endif
+
+  if (!g_device) {
+      std::cerr << "Failed to get device." << std::endl;
+      exit(1);
+  }
+  
+  g_queue = wgpuDeviceGetQueue(g_device);
+
+  WGPUSurfaceCapabilities caps = {};
+  wgpuSurfaceGetCapabilities(g_surface, g_adapter, &caps);
+  g_format = caps.formats[0];
+
+  WGPUSurfaceConfiguration config = {};
+  config.device = g_device;
+  config.format = g_format;
+  config.usage = WGPUTextureUsage_RenderAttachment;
+  config.width = g_width;
+  config.height = g_height;
+  config.presentMode = WGPUPresentMode_Fifo;
+  config.alphaMode = WGPUCompositeAlphaMode_Opaque;
+  wgpuSurfaceConfigure(g_surface, &config);
+}
+
+void setup_scene() {
+  g_scene.clear();
+  // Center Red Cube
+  Object3D center;
+  center.position = vec3(0, 0, 0);
+  center.color = vec4(1, 0, 0, 1);
+  g_scene.add_object(center);
+
+  // Orbiting Green Cubes
+  for (int i = 0; i < 8; ++i) {
+    Object3D obj;
+    float angle = (i / 8.0f) * 6.28318f;
+    obj.position = vec3(std::cos(angle) * 4.0f, 0, std::sin(angle) * 4.0f);
+    obj.scale = vec3(0.5f, 0.5f, 0.5f);
+    obj.color = vec4(0, 1, 0, 1);
+    g_scene.add_object(obj);
+  }
+}
+
+int main() {
+  platform_init_window(false);
+  
+  init_wgpu();
+  
+  g_renderer.init(g_device, g_queue, g_format);
+  g_renderer.resize(g_width, g_height);
+  
+  setup_scene();
+  
+  g_camera.position = vec3(0, 5, 10);
+  g_camera.target = vec3(0, 0, 0);
+  
+  float time = 0.0f;
+  while (!platform_should_close()) {
+    platform_poll();
+    
+    time += 0.016f; // Approx 60fps
+    
+    // Animate Objects
+    for (size_t i = 1; i < g_scene.objects.size(); ++i) {
+        g_scene.objects[i].rotation = quat::from_axis(vec3(0, 1, 0), time * 2.0f + i);
+        g_scene.objects[i].position.y = std::sin(time * 3.0f + i) * 1.5f;
+    }
+    
+    // Animate Camera Height and Radius
+    float cam_radius = 10.0f + std::sin(time * 0.3f) * 4.0f;
+    float cam_height = 5.0f + std::cos(time * 0.4f) * 3.0f;
+    g_camera.set_look_at(
+        vec3(std::sin(time * 0.5f) * cam_radius, cam_height, std::cos(time * 0.5f) * cam_radius),
+        vec3(0, 0, 0),
+        vec3(0, 1, 0)
+    );
+    
+    // Render Frame
+    WGPUSurfaceTexture surface_tex;
+    wgpuSurfaceGetCurrentTexture(g_surface, &surface_tex);
+    
+    if (surface_tex.status == WGPUSurfaceGetCurrentTextureStatus_SuccessOptimal) {
+        WGPUTextureViewDescriptor view_desc = {};
+        view_desc.format = g_format;
+        view_desc.dimension = WGPUTextureViewDimension_2D;
+        view_desc.baseMipLevel = 0;
+        view_desc.mipLevelCount = 1;
+        view_desc.baseArrayLayer = 0;
+        view_desc.arrayLayerCount = 1;
+        view_desc.aspect = WGPUTextureAspect_All;
+        WGPUTextureView view = wgpuTextureCreateView(surface_tex.texture, &view_desc);
+        
+        g_renderer.render(g_scene, g_camera, time, view);
+        
+        wgpuTextureViewRelease(view);
+        wgpuSurfacePresent(g_surface);
+        wgpuTextureRelease(surface_tex.texture);
+    }
+    
+#if !defined(DEMO_CROSS_COMPILE_WIN32)
+    // Poll events for wgpu-native to ensure callbacks fire and frame presents?
+    // We don't have easy access to instance here unless we store it globally.
+    // Let's just assume Present handles enough synchronization for this demo.
+#endif
+  }
+  
+  g_renderer.shutdown();
+  platform_shutdown();
+  return 0;
+}