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 , flags(0) {
  20         runner.SetFrameShift(1);
  21 }
  22
  23
  24 void Entity::SetOrientation(Orientation o) {
  25         orientation = o;
  26         UpdateVelocity();
  27         runner.SetColOffset(orientation);
  28 }
  29
  30 void Entity::SetSpeed(float s) {
  31         speed = s;
  32         UpdateVelocity();
  33 }
  34
  35 void Entity::StartAnimation(app::Application &ctrl) {
  36         runner.Start(ctrl);
  37 }
  38
  39 void Entity::StartAnimation(app::State &ctrl) {
  40         runner.Start(ctrl);
  41 }
  42
  43 void Entity::StopAnimation() {
  44         runner.Stop();
  45 }
  46
  47 void Entity::AddFollower(Entity *f) {
  48         if (follower) {
  49                 follower->AddFollower(f);
  50         } else {
  51                 follower = f;
  52         }
  53 }
  54
  55 void Entity::RemoveFollower(Entity *f) {
  56         if (follower == f) {
  57                 follower = follower->follower;
  58         } else if (follower) {
  59                 follower->RemoveFollower(f);
  60         }
  61 }
  62
  63 void Entity::SetAnimation(const graphics::Animation *a) {
  64         animation = a;
  65         runner.ChangeAnimation(animation);
  66 }
  67
  68
  69 void Entity::UpdateVelocity() {
  70         if (speed == 0.0f) {
  71                 velocity = Vector<float>();
  72                 return;
  73         }
  74         switch (orientation) {
  75                 case ORIENTATION_NORTH:
  76                         velocity = Vector<float>(0.0f, -speed);
  77                         break;
  78                 case ORIENTATION_EAST:
  79                         velocity = Vector<float>(speed, 0.0f);
  80                         break;
  81                 case ORIENTATION_SOUTH:
  82                         velocity = Vector<float>(0.0f, speed);
  83                         break;
  84                 case ORIENTATION_WEST:
  85                         velocity = Vector<float>(-speed, 0.0f);
  86                         break;
  87         }
  88 }
  89
  90
  91 bool Entity::TileLock(const geometry::Vector<int> &tileSize) const {
  92         // TODO: change position to point to the top-left corner of a tile
  93         Vector<int> tilePosition(position);
  94         return (tilePosition.X() % tileSize.X() == 0) && (tilePosition.Y() % tileSize.Y() == 0);
  95 }
  96
  97
  98 void Entity::Update(float deltaT) {
  99         position += velocity * deltaT;
 100 }
 101
 102
 103 void Entity::Render(SDL_Surface *dest, const Vector<int> &offset) const {
 104         // TODO: configurable sprite offsets
 105         if (runner.Running()) {
 106                 runner.Draw(dest, offset + position + spriteOffset);
 107         } else {
 108                 animation->GetSprite()->Draw(dest, offset + position + spriteOffset, orientation);
 109         }
 110 }
 111
 112 }