/***********************************************************************************************************************
 *
 * Copyright (c) 2010 - 2025 by Tech Soft 3D, Inc.
 * The information contained herein is confidential and proprietary to Tech Soft 3D, Inc., and considered a trade secret
 * as defined under civil and criminal statutes. Tech Soft 3D shall pursue its civil and criminal remedies in the event
 * of unauthorized use or misappropriation of its trade secrets. Use of this information by anyone other than authorized
 * employees of Tech Soft 3D, Inc. is granted only under a written non-disclosure agreement, expressly prescribing the
 * scope and manner of such use.
 *
 ***********************************************************************************************************************/

#include "mesh.h"

#include <algorithm>

#include <glm/mat4x4.hpp>

Mesh::Mesh(const utils::geometry::BufferData& data,
	const glm::mat4& plnt,
	const utils::properties::style::Graphics& style_)
{
	placement = plnt;
	style = style_;
	indice_count = static_cast<int>(data.indices.size() );
	box = data.mesh_box.transform(plnt);
	vao.Bind();
	VBO vbo(data.vertices);
	EBO ebo(data.indices);
	vao.LinkAttrib(vbo, 0, 3, GL_FLOAT, sizeof(utils::geometry::Vertex), (GLvoid*) 0);
	vao.LinkAttrib(vbo, 1, 3, GL_FLOAT, sizeof(utils::geometry::Vertex), (GLvoid*) ( 3 * sizeof(float) ));
	vao.Unbind();
	vbo.Unbind();
	ebo.Unbind();
}

void Mesh::draw()
{
	if (indice_count == 0)
		return;

	vao.Bind();

	// Draw the actual mesh
	glDrawElements(GL_TRIANGLES, indice_count, GL_UNSIGNED_INT, 0);
	vao.Unbind();
}

void Mesh::sort_by_style(std::vector<Mesh>& models)
{
	auto  by_style = [] (const Mesh& m1, const Mesh& m2) {
		return m1.style.id < m2.style.id;
	};
	std::sort(models.begin(), models.end(), by_style);
}