Camera.cpp

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#include "Application.hpp"

Camera::Camera(Application* app)
    : m_app(app)
    , m_cameraSideWayActive(false)
{
    m_transformation.limitRotationX(glm::degrees(-85.0f), glm::degrees(+85.0f));
    m_mouseBorder = 50;
}

void Camera::update(double time, double timeDelta)
{
    auto& wnd = m_app->getWindow();

    const float move_speed = 20.0f;
    const float rot_speed = 0.5f;

    {
        auto lookV = m_transformation.getLookVector();
        auto sideV = m_transformation.getSideVector();

        auto move_delta = sideV * (float)(wnd.keyDown(GLFW_KEY_D) - wnd.keyDown(GLFW_KEY_A)) +
                          lookV * (float)(wnd.keyDown(GLFW_KEY_S) - wnd.keyDown(GLFW_KEY_W));

        // Auto-movment if cursor is in border-area
        if (m_cameraSideWayActive)
        {
            if (wnd.getCursor().x < m_mouseBorder)                  move_delta = move_delta - (sideV); // left
            if (wnd.getCursor().x > wnd.getSize().x - m_mouseBorder)    move_delta = move_delta + (sideV); // right     
            if (wnd.getCursor().y < m_mouseBorder)                  move_delta = move_delta - (lookV); // down
            if (wnd.getCursor().y > wnd.getSize().y - m_mouseBorder)    move_delta = move_delta + (lookV); // up
        }

        if ( move_delta.x != 0 || move_delta.y != 0 || move_delta.z != 0 )
            m_transformation.move( move_delta * move_speed * (float)timeDelta );
    }

    if (wnd.mouseDown(GLFW_MOUSE_BUTTON_RIGHT))
    {   
        auto rot_delta = vec3(glm::radians(-wnd.getCursorDelta().y),
                                      -glm::radians(wnd.getCursorDelta().x),
                                       0);
        if ( rot_delta.x != 0 || rot_delta.y != 0 || rot_delta.z != 0 )
            m_transformation.rotate( rot_delta * rot_speed );
    }

    m_hasViewChanged = m_transformation.needsRecalc();
}
void Camera::onKeyStateChanged(int key, bool pressed)
{
    if (!pressed)
    {
        if (key == GLFW_KEY_SCROLL_LOCK)
            m_app->getCamera().sideWayActive(!m_app->getCamera().sideWayActive());
    }
}