src/map/Entity.cpp

   1 /*
   2  * Entity.cpp
   3  *
   4  *  Created on: Sep 29, 2012
   5  *      Author: holy
   6  */
   7
   8 #include "Entity.h"
   9
  10 using geometry::Vector;
  11
  12 namespace map {
  13
  14 Entity::Entity()
  15 : follower(0)
  16 , animation(0)
  17 , orientation(ORIENTATION_NORTH)
  18 , speed(0) {
  19         runner.SetFrameShift(1);
  20 }
  21
  22
  23 void Entity::SetOrientation(Orientation o) {
  24         orientation = o;
  25         UpdateVelocity();
  26         runner.SetColOffset(orientation);
  27 }
  28
  29 void Entity::SetSpeed(float s) {
  30         speed = s;
  31         UpdateVelocity();
  32 }
  33
  34 void Entity::StartAnimation(app::Application &ctrl) {
  35         runner.Start(ctrl);
  36 }
  37
  38 void Entity::StartAnimation(app::State &ctrl) {
  39         runner.Start(ctrl);
  40 }
  41
  42 void Entity::StopAnimation() {
  43         runner.Stop();
  44 }
  45
  46 void Entity::AddFollower(Entity *f) {
  47         if (follower) {
  48                 follower->AddFollower(f);
  49         } else {
  50                 follower = f;
  51         }
  52 }
  53
  54 void Entity::RemoveFollower(Entity *f) {
  55         if (follower == f) {
  56                 follower = follower->follower;
  57         } else if (follower) {
  58                 follower->RemoveFollower(f);
  59         }
  60 }
  61
  62 void Entity::SetAnimation(const graphics::Animation *a) {
  63         animation = a;
  64         runner.ChangeAnimation(animation);
  65 }
  66
  67
  68 void Entity::UpdateVelocity() {
  69         if (speed == 0.0f) {
  70                 velocity = Vector<float>();
  71                 return;
  72         }
  73         switch (orientation) {
  74                 case ORIENTATION_NORTH:
  75                         velocity = Vector<float>(0.0f, -speed);
  76                         break;
  77                 case ORIENTATION_EAST:
  78                         velocity = Vector<float>(speed, 0.0f);
  79                         break;
  80                 case ORIENTATION_SOUTH:
  81                         velocity = Vector<float>(0.0f, speed);
  82                         break;
  83                 case ORIENTATION_WEST:
  84                         velocity = Vector<float>(-speed, 0.0f);
  85                         break;
  86         }
  87 }
  88
  89
  90 bool Entity::TileLock(const geometry::Vector<int> &tileSize) const {
  91         // TODO: change position to point to the top-left corner of a tile
  92         Vector<int> tilePosition(position);
  93         return (tilePosition.X() % tileSize.X() == 0) && (tilePosition.Y() % tileSize.Y() == 0);
  94 }
  95
  96
  97 void Entity::Update(float deltaT) {
  98         position += velocity * deltaT;
  99 }
 100
 101
 102 void Entity::Render(SDL_Surface *dest, const Vector<int> &offset) const {
 103         // TODO: configurable sprite offsets
 104         if (runner.Running()) {
 105                 runner.Draw(dest, offset + position + spriteOffset);
 106         } else {
 107                 animation->GetSprite()->Draw(dest, offset + position + spriteOffset, orientation);
 108         }
 109 }
 110
 111 }