Basic hit detection

src/dawn/scene/components/physics/2d/Collider2D.cpp

@@ -4,9 +4,64 @@
 // https://opensource.org/licenses/MIT
 
 #include "Collider2D.hpp"
+#include "BoxCollider.hpp"
 
 using namespace Dawn;
 
 Collider2D::Collider2D(SceneItem *i) : SceneItemComponent(i) {
   
+}
+
+bool_t Collider2D::getCollidingResult(
+  glm::vec2 movement,
+  Collider2D *other,
+  glm::vec2 &normal,
+  float_t &entryTime,
+  float_t &exitTime,
+  glm::vec2 &entryPoint,
+  glm::vec2 &exitPoint
+) {
+  assertNotNull(other);
+  assertTrue(movement.x != 0 || movement.y != 0);
+
+  auto localPos = this->transform->getLocalPosition();
+  glm::vec2 myPos(localPos.x, localPos.z);
+
+
+  // Check what THIS is
+  switch(this->getColliderType()) {
+    case COLLIDER2D_TYPE_BOX: {
+      auto box1 = dynamic_cast<BoxCollider*>(this);
+      assertNotNull(box1);
+
+      // Box VS ?
+      switch(other->getColliderType()) {
+        case COLLIDER2D_TYPE_BOX: {
+          auto box2 = dynamic_cast<BoxCollider*>(other);
+          assertNotNull(box2);
+          auto localPos2 = box2->transform->getLocalPosition();
+          glm::vec2 otherPos(localPos2.x, localPos2.z);
+
+          return boxCheckCollision(
+            myPos, box1->min, box1->max,
+            otherPos, box2->min, box2->max,
+            movement,
+            normal, entryTime, exitTime, entryPoint, exitPoint
+          );
+        }
+        
+        default: {
+          assertUnreachable();
+        }
+      }
+      break;
+    }
+
+    default: {
+      assertUnreachable();
+    }
+  }
+  
+  assertUnreachable();
+  return false;
 }