1 files changed, 22 insertions, 0 deletions
diff --git a/src/effects/moving_ellipse_effect.cc b/src/effects/moving_ellipse_effect.cc
new file mode 100644
index 0000000..f595de9
--- /dev/null
+++ b/src/effects/moving_ellipse_effect.cc
@@ -0,0 +1,22 @@
+// This file is part of the 64k demo project.
+// It implements the MovingEllipseEffect.
+
+#include "gpu/demo_effects.h"
+#include "gpu/post_process_helper.h"
+#include "gpu/gpu.h"
+
+// --- MovingEllipseEffect ---
+MovingEllipseEffect::MovingEllipseEffect(const GpuContext& ctx) : Effect(ctx) {
+  // uniforms_ is initialized by Effect base class
+  ResourceBinding bindings[] = {{uniforms_.get(), WGPUBufferBindingType_Uniform}};
+  pass_ = gpu_create_render_pass(ctx_.device, ctx_.format, ellipse_shader_wgsl,
+                                 bindings, 1);
+  pass_.vertex_count = 3;
+}
+void MovingEllipseEffect::render(WGPURenderPassEncoder pass,
+                                 const CommonPostProcessUniforms& uniforms) {
+  uniforms_.update(ctx_.queue, uniforms);
+  wgpuRenderPassEncoderSetPipeline(pass, pass_.pipeline);
+  wgpuRenderPassEncoderSetBindGroup(pass, 0, pass_.bind_group, 0, nullptr);
+  wgpuRenderPassEncoderDraw(pass, 3, 1, 0, 0);
+}