/*
 * Copyright 2017 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef C_ARCORE_HELLOE_AR_POINT_CLOUD_RENDERER_H_
#define C_ARCORE_HELLOE_AR_POINT_CLOUD_RENDERER_H_

#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <cstdlib>
#include <vector>

#include "arcore_c_api.h"
#include "glm.h"

namespace hello_ar {

    class PointCloudRenderer {
    public:
        // Default constructor of PointCloudRenderer.
        PointCloudRenderer() = default;

        // Default deconstructor of PointCloudRenderer.
        ~PointCloudRenderer() = default;

        // Initialize the GL content, needs to be called on GL thread.
        void InitializeGlContent();

        // Render the AR point cloud.
        //
        // @param mvp_matrix, the model view projection matrix of point cloud.
        // @param ar_session, the session that is used to query point cloud points
        //     from ar_point_cloud.
        // @param ar_point_cloud, point cloud data to for rendering.
        void Draw(glm::mat4 mvp_matrix, ArSession *ar_session,
                  ArPointCloud *ar_point_cloud) const;

    private:
        GLuint shader_program_;
        GLint attribute_vertices_;
        GLint uniform_mvp_mat_;
    };
}  // namespace hello_ar

#endif  // C_ARCORE_HELLOE_AR_POINT_CLOUD_RENDERER_H_