From 5d1eccacac46a4396a19862284b9739340381e06 Mon Sep 17 00:00:00 2001
From: Nick Fisher <nick.fisher@avinium.com>
Date: Wed, 14 Feb 2024 10:49:12 +0800
Subject: [PATCH] add StandardComponents for collision

---
 ios/include/components/StandardComponents.h | 64 +++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 ios/include/components/StandardComponents.h

diff --git a/ios/include/components/StandardComponents.h b/ios/include/components/StandardComponents.h
new file mode 100644
index 00000000..bd5e3f20
--- /dev/null
+++ b/ios/include/components/StandardComponents.h
@@ -0,0 +1,64 @@
+#ifndef _STANDARD_COMPONENTS_H
+#define _STANDARD_COMPONENTS_H
+
+#include "utils/Entity.h"
+#include "utils/EntityInstance.h"
+#include "utils/SingleInstanceComponentManager.h"
+#include "filament/TransformManager.h"
+#include "gltfio/FilamentAsset.h"
+#include "gltfio/FilamentInstance.h"
+
+namespace polyvox
+{
+
+class FloatComponentManager : public utils::SingleInstanceComponentManager<float, float, float, float> {
+
+    static constexpr size_t DIRECTION = 0;
+    static constexpr size_t POSITION = 1;
+    static constexpr size_t MAX = 2;
+    static constexpr size_t SPEED = 2;
+    
+    // void update() { 
+    //     const auto* entities = getEntities();
+    //     for(int i = 0; i < getComponentCount(); i++) {
+    //         // const auto instance = getInstance();
+    //         // elementAt<POSITION> 
+    //         // const auto component = get
+    //         // const auto entity = entities[i];
+            
+    //     }
+    // }
+};
+
+class CollisionComponentManager : public utils::SingleInstanceComponentManager<filament::gltfio::FilamentInstance*> {
+
+    static constexpr size_t INSTANCE = 0;
+
+    const filament::TransformManager& _transformManager;
+    public:
+        CollisionComponentManager(const filament::TransformManager& transformManager) : _transformManager(transformManager) {}
+    
+        bool collides(filament::Aabb sourceBox) { 
+            auto sourceCorners = sourceBox.getCorners();
+            const auto& entities = getEntities();
+            for(auto it = begin(); it < end(); it++) {
+                auto entity = entities[it];
+                
+                auto targetInstance = elementAt<INSTANCE>(it);    
+                auto targetXformInstance = _transformManager.getInstance(entity);
+                auto targetXform = _transformManager.getWorldTransform(targetXformInstance);
+                auto targetBox = targetInstance->getBoundingBox().transform(targetXform);
+                for(int i = 0; i < 8; i++) {
+                    if(targetBox.contains(sourceCorners.vertices[i]) < 0) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+};
+
+
+}
+
+#endif
\ No newline at end of file