src/graphics/Camera.cpp

   1 /*
   2  * Camera.cpp
   3  *
   4  *  Created on: Sep 29, 2012
   5  *      Author: holy
   6  */
   7
   8 #include "Camera.h"
   9
  10 #include <cassert>
  11
  12 using geometry::Vector;
  13
  14 namespace graphics {
  15
  16 Camera::Camera(int width, int height, const Vector<float> *target)
  17 : target(target), halfWidth(width / 2), halfHeight(height / 2) {
  18
  19 }
  20
  21
  22 void Camera::SetTarget(const Vector<float> *t) {
  23         target = t;
  24 }
  25
  26
  27 Vector<int> Camera::CalculateOffset() const {
  28         if (target) {
  29                 return Vector<int>(
  30                                 (target->X() - halfWidth) * -1,
  31                                 (target->Y() - halfHeight) * -1);
  32         } else {
  33                 return Vector<int>();
  34         }
  35 }
  36
  37 }