split composite model in template and instance

[blank.git] / src / model / CompositeInstance.hpp

diff --git a/src/model/CompositeInstance.hpp b/src/model/CompositeInstance.hpp
new file mode 100644 (file)
index 0000000..7d48b76
--- /dev/null
+++ b/src/model/CompositeInstance.hpp
@@ -0,0 +1,55 @@
+#ifndef BLANK_MODEL_COMPOSITEINSTANCE_HPP_
+#define BLANK_MODEL_COMPOSITEINSTANCE_HPP_
+
+#include <vector>
+#include <glm/glm.hpp>
+#include <glm/gtc/quaternion.hpp>
+
+
+namespace blank {
+
+class CompositeModel;
+class DirectionalLighting;
+
+// TODO: this doesn't have to be a tree, actually
+//       linearizing might be a good opportunity to optimize
+class CompositeInstance {
+
+       friend class CompositeModel;
+
+public:
+       CompositeInstance();
+
+       operator bool() const noexcept { return part_model; }
+
+       const glm::vec3 &Position() const noexcept { return position; }
+       void Position(const glm::vec3 &p) noexcept { position = p; }
+
+       const glm::quat &Orientation() const noexcept { return orientation; }
+       void Orientation(const glm::quat &o) noexcept { orientation = o; }
+
+       glm::mat4 LocalTransform() const noexcept;
+       glm::mat4 GlobalTransform() const noexcept;
+
+       void Render(const glm::mat4 &, DirectionalLighting &) const;
+
+private:
+       CompositeInstance &AddPart();
+       bool HasParent() const noexcept { return parent; }
+       CompositeInstance &Parent() const noexcept { return *parent; }
+       bool IsRoot() const noexcept { return !HasParent(); }
+
+private:
+       const CompositeModel *part_model;
+       CompositeInstance *parent;
+
+       glm::vec3 position;
+       glm::quat orientation;
+
+       std::vector<CompositeInstance> parts;
+
+};
+
+}
+
+#endif