From d8ba57f6d45b9467520377ffcc1f453154d77430 Mon Sep 17 00:00:00 2001
From: hachem <im@hachem.wtf>
Date: Thu, 21 Aug 2025 19:08:34 +0200
Subject: fix: proper scene loading

---
 src/engine/engine.cpp | 82 ++++++++++++++++++++++++++++++++++++++++++++++-----
 src/engine/engine.h   |  7 ++++-
 2 files changed, 81 insertions(+), 8 deletions(-)

(limited to 'src/engine')

diff --git a/src/engine/engine.cpp b/src/engine/engine.cpp
index 9577d1e..ef9b93d 100644
--- a/src/engine/engine.cpp
+++ b/src/engine/engine.cpp
@@ -5,6 +5,7 @@
 #include <GLFW/glfw3.h>
 
 #include "engine.h"
+#include "core/log.h"
 #include "rendering/vertex_buffer.h"
 #include "rendering/index_buffer.h"
 
@@ -13,14 +14,14 @@ namespace Donut
     Engine::Engine()
         : m_sag_a(glm::vec3(0.0f, 0.0f, 0.0f), 8.54e36f)
     {
-        GLFWwindow* window = static_cast<GLFWwindow*>(Application::get().get_window().get_native_window());
-        glfwGetFramebufferSize(window, &m_width, &m_height);
+        m_width = 1280;
+        m_height = 720;
         
         m_camera.set_camera_mode(CameraMode::Orbital);
-        m_camera.set_orbital_radius(6.34194e10);
-        m_camera.set_orbital_limits(1e10, 1e12);
+        m_camera.set_orbital_radius(1e11);
+        m_camera.set_orbital_limits(1e9, 1e13);
         m_camera.set_orbital_speed(0.01f);
-        m_camera.set_zoom_speed(25e9f);
+        m_camera.set_zoom_speed(1e10f);
         
         m_objects = 
         {
@@ -47,12 +48,17 @@ namespace Donut
 
     void Engine::update_window_dimensions()
     {
-        GLFWwindow* window = static_cast<GLFWwindow*>(Application::get().get_window().get_native_window());
+        update_compute_dimensions();
+    }
+    
+    void Engine::set_window_dimensions(int width, int height)
+    {
         int old_width = m_width;
         int old_height = m_height;
         int old_compute_height = m_compute_height;
         
-        glfwGetFramebufferSize(window, &m_width, &m_height);
+        m_width = width;
+        m_height = height;
         
         if (old_width         != m_width  || 
             old_height        != m_height || 
@@ -273,4 +279,66 @@ namespace Donut
         
         return { vertex_array, texture };
     }
+    
+    void Engine::load_objects_from_scene(const std::vector<Donut::Object>& objects)
+    {
+        m_objects.clear();
+        m_objects.push_back(
+        { 
+            glm::vec4(0.00f, 0.00f, 0.00f, m_sag_a.m_rs), 
+            glm::vec4(0, 0, 0, 1), 
+            static_cast<float>(m_sag_a.m_mass) 
+        });
+        
+        for (const auto& obj : objects)
+        {
+            ObjectData engine_obj;
+            
+            float scale_factor = 1e10f;
+            engine_obj.m_pos_radius = glm::vec4
+            (
+                obj.m_centre.x * scale_factor,
+                obj.m_centre.y * scale_factor,
+                obj.m_centre.z * scale_factor,
+                obj.m_radius * scale_factor
+            );
+            
+            engine_obj.m_color = glm::vec4(obj.m_material.m_color, 1.0f);
+            
+            float volume  = (4.0f / 3.0f) * 3.14159f * engine_obj.m_pos_radius.w * engine_obj.m_pos_radius.w * engine_obj.m_pos_radius.w;
+            float density = 1e12f;
+            engine_obj.m_mass     = volume * density;
+            engine_obj.m_velocity = glm::vec3(0.0f, 0.0f, 0.0f);
+            
+            m_objects.push_back(engine_obj);
+        }
+        
+        DONUT_INFO("Loaded {} objects from WorldBuilder scene (scaled up by {})", objects.size(), 1e10f);
+        print_object_info();
+    }
+    
+    void Engine::print_object_info() const
+    {
+        DONUT_INFO("=== Object Information ===");
+        DONUT_INFO("Total objects: {}", m_objects.size());
+        
+        for (size_t i = 0; i < m_objects.size(); ++i)
+        {
+            const auto& obj = m_objects[i];
+            DONUT_INFO("Object {}: Pos=({:.2e}, {:.2e}, {:.2e}), Radius={:.2e}, Mass={:.2e}, Color=({:.2f}, {:.2f}, {:.2f})", 
+                i,
+                obj.m_pos_radius.x, obj.m_pos_radius.y, obj.m_pos_radius.z,
+                obj.m_pos_radius.w,
+                obj.m_mass,
+                obj.m_color.x, obj.m_color.y, obj.m_color.z
+            );
+        }
+        DONUT_INFO("Camera position: ({:.2e}, {:.2e}, {:.2e})", 
+            m_camera.get_orbital_position().x,
+            m_camera.get_orbital_position().y,
+            m_camera.get_orbital_position().z
+        );
+        DONUT_INFO("Camera radius: {:.2e}", m_camera.get_orbital_radius());
+        DONUT_INFO("========================");
+    }
 }
diff --git a/src/engine/engine.h b/src/engine/engine.h
index 124fa39..b0e06f3 100644
--- a/src/engine/engine.h
+++ b/src/engine/engine.h
@@ -8,8 +8,9 @@
 #include <chrono>
 #include <cmath>
 
-#include "core/application.h"
 #include "core/camera.h"
+#include "object.h"
+
 #include "rendering/renderer.h"
 #include "rendering/shader.h"
 #include "rendering/vertex_array.h"
@@ -73,6 +74,7 @@ namespace Donut
         void render_scene();
         void update_physics(float delta_time);
         void update_window_dimensions();
+        void set_window_dimensions(int width, int height);
 
         int get_width()  const { return m_width;  }
         int get_height() const { return m_height; }
@@ -97,6 +99,9 @@ namespace Donut
         void  set_max_steps_moving(int steps) { m_max_steps_moving = steps; }
         void  set_max_steps_static(int steps) { m_max_steps_static = steps; }
         void  set_early_exit_distance(float distance) { m_early_exit_distance = distance; }
+        
+        void load_objects_from_scene(const std::vector<Donut::Object>& objects);
+        void print_object_info() const;
     private:
         Ref<Shader> create_compute_program(const char* path);
         std::pair<Ref<VertexArray>, Ref<Texture2D>> quad_vao();
-- 
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