triangles/Triangle.cpp

/**
 *  Triangles
 *  Copyright (C) 2016 POSITIVE MENTAL ATTITUDE
 *
 *  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, version 3 of the License.
 *
 *  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/>.
 */

#include "Triangle.hpp"
#include <iostream>
#include <cmath>

Triangle::Triangle(): _texture(nullptr), _size(100.f)
{
	_vertices.setPrimitiveType(sf::Triangles);
	_vertices.resize(3);
	_vertices[0].color = sf::Color(255, 255, 255, 255);
	_vertices[1].color = sf::Color(255, 255, 255, 255);
	_vertices[2].color = sf::Color(255, 255, 255, 255);
	setPosition(500.f, 300.f);
	redraw();
}

float Triangle::getSize()
{
	return _size;
}

void Triangle::setSize(float size)
{
	_size = size;
	redraw();
}

void Triangle::vertexFit()
{
	if(_texture == nullptr)
		return;

	_vertices[0].texCoords = sf::Vector2f(_texture->getSize().x / 2, 0);
	_vertices[1].texCoords = sf::Vector2f(_texture->getSize().x, _texture->getSize().y);
	_vertices[2].texCoords = sf::Vector2f(0, _texture->getSize().y);
}

void Triangle::setTexture(sf::Texture& texture)
{
	_texture = &texture; 
	vertexFit();
}

void Triangle::setColor(sf::Color color)
{
	_vertices[0].color = color;
	_vertices[1].color = color;
	_vertices[2].color = color;
}

void Triangle::setColor(unsigned r, unsigned g, unsigned b, unsigned a)
{
	setColor(sf::Color(r, g, b, a));
}

void Triangle::redraw()
{
	double degree = 3.14159265358 / 180.;
	_vertices[0].position = sf::Vector2f(0, -_size);
	_vertices[1].position = sf::Vector2f(std::sin(135.f * degree) * _size, -std::cos(135.f * degree) * _size);
	_vertices[2].position = sf::Vector2f(std::sin(225.f * degree) * _size, -std::cos(225.f * degree) * _size);
} 

void Triangle::draw(sf::RenderTarget& target, sf::RenderStates states) const
{
	states.transform *= getTransform();

	if(_texture != nullptr)
		states.texture = (_texture);

	target.draw(_vertices, states);
}