#include "ExampleGenerator.h"

#include <cmath>
#include <utility>

#include <raylib.h>

#include "Bullets.h"


ExampleGenerator::ExampleGenerator(ConstantVelocityBullet::Vector& bullets) :
    m_bullets {bullets},
    m_delay {0},
    m_interval {0.2f},
    m_cone {0.3f},
    m_speed {120},
    m_shift {10},
    m_segments {3},
    m_origin {400, 20}
{
}


void
ExampleGenerator::update(const float dt)
{
    m_delay += dt;
    if (m_delay > m_interval) {
        m_delay -= m_interval;
        for (float i = 0; i <= m_segments; ++i) {
            const float angle = ((1 - m_cone) / 2 + m_cone * i / m_segments) * M_PI;
            const float cos = std::cos(angle);
            const float sin = std::sin(angle);
            ConstantVelocityBullet bullet;
            bullet.color = RED;
            bullet.radius = 4;
            bullet.velocity.x = cos * m_speed;
            bullet.velocity.y = sin * m_speed;
            bullet.position.x = m_origin.x + cos * m_shift;
            bullet.position.y = m_origin.y + sin * m_shift;
            m_bullets.push_back(std::move(bullet));
        }
        m_segments += 3;
        if (m_segments > 20)
            m_segments = 3;
    }
}