Basic transform stuff

src/dawn/display/Transform.hpp

@@ -0,0 +1,69 @@
+// Copyright (c) 2022 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "dawnlibs.hpp"
+#include "util/flag.hpp"
+
+namespace Dawn {
+  class SceneItem;
+
+  class Transform : public std::enable_shared_from_this<Transform> {
+    private:
+      // Local (real) values
+      glm::vec3 localPosition;
+      glm::vec3 localScale;
+      glm::quat localRotation;
+
+      // Cached (non-real) values
+      glm::mat4 transformLocal;
+      glm::mat4 transformWorld;
+
+      glm::vec3 position;
+      glm::vec3 scale;
+      glm::quat rotation;
+
+      // Heirarchy
+      Transform *parent = nullptr;
+      std::vector<Transform *> children;
+
+      // Hidden methods
+      void updateLocalValuesFromLocalTransform();
+      void updateLocalTransformFromLocalValues();
+      void updateWorldTransformFromLocalTransform();
+      void updateLocalTransformFromWorldTransform();
+      void updateChildrenTransforms();
+
+    public:
+      SceneItem &item;
+
+      Transform(SceneItem &item);
+
+      void lookAt(glm::vec3 position, glm::vec3 look);
+      void lookAt(glm::vec3 position, glm::vec3 look, glm::vec3 up);
+
+      glm::vec3 getLocalPosition();
+      void setLocalPosition(glm::vec3 position);
+
+      glm::vec3 getLocalScale();
+      void setLocalScale(glm::vec3 scale);
+      
+      glm::quat getLocalRotation();
+      void setLocalRotation(glm::quat rotation);
+      
+
+      glm::mat4 getLocalTransform();
+      void setLocalTransform(glm::mat4 transform);
+
+      glm::mat4 getWorldTransform();
+      void setWorldTransform(glm::mat4 transform);
+      
+
+      void setParent(Transform *p);
+      Transform * getParent();
+
+      ~Transform();
+  };
+}