src/gl/gridprogram.h

/*
 *  LDForge: LDraw parts authoring CAD
 *  Copyright (C) 2020 Teemu Piippo
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#pragma once
#include "common.h"

class GridProgram : public QObject, protected QOpenGLFunctions
{
	Q_OBJECT
public:
	GridProgram(QObject* parent = nullptr);
	GridProgram(const GridProgram&) = delete;
	GridProgram(GridProgram&&) = delete;
	~GridProgram() = default;
	void initialize();
	void setViewMatrix(const glm::mat4& newViewMatrix);
	void setProjectionMatrix(const glm::mat4& newProjectionMatrix);
	void setModelMatrix(const glm::mat4& newModelMatrix);
	void setGridMatrix(const glm::mat4& newGridMatrix);
	void setGridColor(const QColor& newGridColor);
	void operator=(GridProgram) = delete;
	void draw();
	void teardown();
private:
	void setMatrix(const char* name, const glm::mat4& matrix);
	void checkForGLErrors();
	bool isInitialized = false;
	QOpenGLBuffer buffer;
	QOpenGLShader vertexShader;
	QOpenGLShader fragmentShader;
	std::optional<gl::ShaderProgram> program{std::nullopt};
	glm::vec4 gridColor = {1.0f, 1.0f, 1.0f, 0.75f};
	QOpenGLVertexArrayObject vertexArrayObject;
};