#include "cameranode.h"
#include <glm/ext.hpp>

CameraNode::CameraNode(glm::vec3 position, float yFov, float near, float far) :
    m_hasMoved(true),
    m_hasResized(false),
    m_eye(position),
    m_target(0, 0, 1),
    m_yFov(yFov),
    m_near(near),
    m_far(far)
{

}

void CameraNode::setPosition(glm::vec3 position)
{
    m_hasMoved = true;
    m_eye = position;
}

void CameraNode::setTarget(glm::vec3 target)
{
    m_hasMoved = true;
    m_target = target;
}

void CameraNode::update()
{
    if(m_hasMoved)
        m_view = glm::lookAt(m_eye, m_target, glm::vec3(0, 1, 0));
    if(m_hasResized)
        m_projection = glm::perspective(m_yFov, m_ratio, m_near, m_far);
}

glm::mat4 CameraNode::getProjectionMatrix()
{
    return m_projection;
}

glm::mat4 CameraNode::getViewMatrix()
{
    return m_view;
}

void CameraNode::resize(int width, int height)
{
    m_hasResized = false;
    m_ratio = ((float)width)/((float)height);
}