charcoal/CharcoalBuiltin/PoseableBatch.h

#pragma once

#include <charcoal/Batch.h>
#include <charcoal/Renderable.h>
#include <charcoal/Poseable.h>
#include "BuiltinBatch.h"

namespace charcoal
{
	namespace builtin
	{
		// Note: If anything is changed in this file, it must also be changed in Poseable2DBatch
		template <typename VertexType, typename IndexType, typename RenderableT = RenderableT<VertexType, IndexType> >
		class PoseableBatch : public builtin::Batch<VertexType, IndexType, 1, RenderableT>
		{
		public:
			PoseableBatch(
				RenderableT* renderable,
				int element_count
			) : PoseableBatch(renderable, element_count, element_count)
			{}

			PoseableBatch(
				RenderableT* renderable,
				int element_count,
				int element_render_count
			) : builtin::Batch<VertexType, IndexType, 1, RenderableT>(renderable, element_render_count), m_pose_elements(element_count)
			{}

			virtual ~PoseableBatch() {}

			Poseable& get_pose(int index) { return m_pose_elements[index]; }
			const Poseable& get_pose(int index) const { return m_pose_elements[index]; }

		protected:
			void setup_element_buffers()
			{
				glBindBuffer(GL_ARRAY_BUFFER, charcoal::Batch<VertexType, IndexType, 1, RenderableT>::m_element_buffers[0]);
				glBufferData(GL_ARRAY_BUFFER, m_pose_elements.size() * sizeof(Poseable), NULL, GL_STREAM_DRAW);
			}

			void update_element_buffers()
			{
				// TODO: There are probably better ways to do this. Should check with the old engine to see what I did there.
				glBindBuffer(GL_ARRAY_BUFFER, charcoal::Batch<VertexType, IndexType, 1, RenderableT>::m_element_buffers[0]);
				glBufferData(GL_ARRAY_BUFFER, m_pose_elements.size() * sizeof(Poseable), NULL, GL_STREAM_DRAW);
				glBufferSubData(GL_ARRAY_BUFFER, 0, m_pose_elements.size() * sizeof(Poseable), m_pose_elements.data());
			}

			std::vector<Poseable> m_pose_elements;
		};
	}
}