/*
 * RenderContext.cpp
 *
 *  Created on: Nov 30, 2016
 *      Author: tibi
 */
#include <base/Camera.h>
#include <base/GameObject.h>
#include <base/RenderContext.h>
#include <base/Transform.h>

namespace farmlands {
namespace base {

float RenderContext::xToWorld(float x)
{
	float cellW = viewport.pixelsPerUnitX * m_camera->scale;
	return (x - viewport.width / 2) / cellW + m_cameraTransform->x;
}

float RenderContext::yToWorld(float y)
{
	float cellH = viewport.pixelsPerUnitY * m_camera->scale;
	return (y - viewport.height / 2) / cellH + m_cameraTransform->y;
}

float RenderContext::xToScreen(float x)
{
	float cellW = viewport.pixelsPerUnitX * m_camera->scale;
	return (x - m_cameraTransform->x) * cellW + viewport.width / 2;
}

float RenderContext::yToScreen(float y)
{
	float cellH = viewport.pixelsPerUnitY * m_camera->scale;
	return (y - m_cameraTransform->y) * cellH + viewport.height / 2;
}

void RenderContext::setCamera(GameObject* camera)
{
	m_cameraObj = camera;
	m_cameraTransform = camera->component<Transform>();
	m_camera = camera->component<Camera>();
}

}
}