Camera.cpp

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#include "Camera.h"
#include "Game.h"

void Camera::follow(WorldObject* o, Point2D padding){
        mObject=o;
        mPadding=padding;
}

void Camera::stopFollow(){
        mObject=NULL;
}

void Camera::move(Point2D p){
        pos=p;
}

void Camera::updatePos(){
        if(mObject){
                Point2D position = mObject->getCenterPos();
                Point2D diff = position-pos;
                Point2D screen = Point2D(Game::game()->mScreen->w/2,Game::game()->mScreen->h/2);
                if(mPadding.x == 0 && mPadding.y == 0)
                        pos = mObject->getCenterPos()-screen;
                else if(diff.x > mPadding.x || diff.x < -mPadding.x || diff.y > mPadding.y || diff.y < -mPadding.y){
                }
        }
}

void Camera::zoom(double z){
        Size2D s = Game::game()->getScreenSize();
        Size2D scaled = s*z;
        Size2D diff = (scaled-s)/2;
        glMatrixMode( GL_PROJECTION );
        glLoadIdentity();

        glOrtho( -diff.w, s.w + diff.w, s.h + diff.h, -diff.h, -1, 1 );

        glMatrixMode( GL_MODELVIEW );
        glLoadIdentity();
        mZoom = z;
}


void Camera::zoomIn(double z){
        zoom(mZoom-z);
}

void Camera::zoomOut(double z){
        zoom(mZoom+z);
}