SpaceExpansion/Control/Camera.cpp

//
// Created by jovian on 18/08/17.
//

#include "Camera.h"

Camera::Camera() : m_pos(0.0f, 0.0f), m_cursorPos(0.0f, 0.0f), m_zoom(100.0f), m_press(false), m_infoWanted(false) {}

Camera::~Camera() {}

void Camera::refresh(Input *input) {
    // Change position
    if (input->isMouseMoving() && input->getMouseKey(MOUSE_RIGHT)) {
        b2Vec2 move;
        move.x = (float) input->getXRel() / m_zoom;
        move.y = (float) input->getYRel() / m_zoom;

        m_pos -= move;
    }

    // Zoom
    if (input->getMouseKey(MOUSE_ANNEX_A))
        m_zoom += 1.0f;

    if (input->getMouseKey(MOUSE_ANNEX_B))
        m_zoom -= 1.0f;

    if (input->getMouseKey(MOUSE_MIDDLE))
        m_zoom = 100.0f;

    // Compute cursor position
    m_cursorPos.x = m_pos.x + (float) input->getXFromCenter() / m_zoom;
    m_cursorPos.y = m_pos.y + (float) input->getYFromCenter() / m_zoom;

    // Info wanted
    if (m_press != input->getMouseKey(MOUSE_LEFT)) {
        if (!m_press)
            m_infoWanted = !m_infoWanted;

        m_press = input->getMouseKey(MOUSE_LEFT);
    }
}

bool Camera::getInfoWanted() const {
    return m_infoWanted;
}

const b2Vec2 &Camera::getPos() const {
    return m_pos;
}

float Camera::getZoom() const {
    return m_zoom;
}

const b2Vec2 &Camera::getCursorPos() const {
    return m_cursorPos;
}