[add]: unified interface

1 files changed, 7 insertions, 0 deletions

diff --git a/src/engine/engine.h b/src/engine/engine.h
index c7d02b5..fef8b57 100644
--- a/src/engine/engine.h
+++ b/src/engine/engine.h
@@ -12,6 +12,7 @@
 #include "object.h"
 
 #include "rendering/renderer.h"
+#include "rendering/renderer_backend.h"
 #include "rendering/shader.h"
 #include "rendering/vertex_array.h"
 #include "rendering/texture.h"
@@ -131,6 +132,10 @@ namespace Donut
 
         auto set_hdri_environment(Ref<CubemapTexture> hdri) -> void { m_hdri_environment = hdri; }
         auto get_hdri_environment() const -> Ref<CubemapTexture> { return m_hdri_environment; }
+
+        // Shared live black-hole/disk parameters (drives the geodesic UBOs so the
+        // GL path renders identically to Vulkan). The OpenGL backend mutates this.
+        auto black_hole_params() -> BlackHoleParams& { return m_bh; }
     private:
         auto create_compute_program(const char* path) -> Ref<Shader>;
         std::pair<Ref<VertexArray>, Ref<Texture2D>> QuadVAO();
@@ -175,6 +180,8 @@ namespace Donut
         int   m_max_steps_static    = 30000;
         float m_early_exit_distance = 5.0e11f;
 
+        BlackHoleParams m_bh;   // shared UI-tunable disk/camera params (GL geodesic driver)
+
         float m_disk_thickness = 0.1f;
         float m_disk_density   = 0.1f;
         float m_rotation_speed = 1.0f;