lot of opengl draw work to get image on screen

src/scene/AABB.h

@@ -1,5 +1,6 @@
 #pragma once
-#include <glm/vec3.hpp>
+#include <array>
+#include <glm/glm.hpp>
 #include <utility>
 
 struct AABB
@@ -21,17 +22,32 @@ struct AABB
         max.y = std::max(max.y, pos.y);
         max.z = std::max(max.z, pos.z);
     }
+    void transform(glm::mat4 transform)
+    {
+        std::array<glm::vec3, 8> corners;
+        corners[0] = glm::vec3(min.x, min.y, min.z);
+        corners[1] = glm::vec3(min.x, min.y, max.z);
+        corners[2] = glm::vec3(min.x, max.y, min.z);
+        corners[3] = glm::vec3(min.x, max.y, max.z);
+        corners[4] = glm::vec3(max.x, min.y, min.z);
+        corners[5] = glm::vec3(max.x, min.y, max.z);
+        corners[6] = glm::vec3(max.x, max.y, min.z);
+        corners[7] = glm::vec3(max.x, max.y, max.z);
+        min = glm::vec3(std::numeric_limits<float>::max());
+        max = glm::vec3(std::numeric_limits<float>::lowest());
+        for (int i = 0; i < 8; ++i)
+        {
+            glm::vec4 transformed = transform * glm::vec4(corners[i].x, corners[i].y, corners[i].z, 1.0f);
+            min = glm::vec3(std::min(min.x, transformed.x), std::min(min.y, transformed.y), std::min(min.z, transformed.z));
+            max = glm::vec3(std::max(max.x, transformed.x), std::max(max.y, transformed.y), std::max(max.z, transformed.z));
+        }
+    }
     static AABB combine(AABB lhs, AABB rhs)
     {
-        AABB result;
-
-        result.min.x = std::min(lhs.min.x, rhs.min.x);
-        result.min.y = std::min(lhs.min.y, rhs.min.y);
-        result.min.z = std::min(lhs.min.z, rhs.min.z);
-
-        result.max.x = std::max(lhs.max.x, rhs.max.x);
-        result.max.y = std::max(lhs.max.y, rhs.max.y);
-        result.max.z = std::max(lhs.max.z, rhs.max.z);
+        AABB result = {
+            .min = glm::vec3(std::min(lhs.min.x, rhs.min.x), std::min(lhs.min.y, rhs.min.y), std::min(lhs.min.z, rhs.min.z)),
+            .max = glm::vec3(std::max(lhs.max.x, rhs.max.x), std::max(lhs.max.y, rhs.max.y), std::max(lhs.max.z, rhs.max.z)),
+        };
 
         return result;
     }