src/graphics/Animation.cpp

   1 #include "Animation.h"
   2
   3 #include "Sprite.h"
   4 #include "../app/Application.h"
   5 #include "../app/State.h"
   6 #include "../loader/Interpreter.h"
   7 #include "../loader/TypeDescription.h"
   8
   9 #include <cassert>
  10
  11 using loader::FieldDescription;
  12 using loader::Interpreter;
  13 using loader::TypeDescription;
  14
  15 namespace graphics {
  16
  17 void Animation::CreateTypeDescription() {
  18         TypeDescription &td(TypeDescription::Create(TYPE_ID, "Animation"));
  19         td.SetDescription("Abstract base type for animations.");
  20         td.SetSize(sizeof(Animation));
  21 }
  22
  23 void Animation::AddFields(TypeDescription &td, const Animation &a, std::ptrdiff_t offset) {
  24         td.AddField("sprite", FieldDescription(((char *)&a.sprite) - ((char *)&a) - offset, Sprite::TYPE_ID).SetReferenced().SetDescription("the sprite used for cutting out frames"));
  25         td.AddField("frametime", FieldDescription(((char *)&a.frameTime) - ((char *)&a) - offset, Interpreter::NUMBER_ID).SetDescription("duration of a frame in miliseconds"));
  26         td.AddField("repeat", FieldDescription(((char *)&a.repeat) - ((char *)&a) - offset, Interpreter::BOOLEAN_ID).SetDescription("whether the animation should start over at the beginning after reaching the last frame"));
  27 }
  28
  29
  30 void AnimationRunner::Start(app::State &ctrl) {
  31         assert(animation);
  32         timer = ctrl.GraphicsTimers().StartInterval(animation->FrameTime());
  33 }
  34
  35 void AnimationRunner::Start(app::Application &ctrl) {
  36         assert(animation);
  37         timer = ctrl.GlobalTimers().StartInterval(animation->FrameTime());
  38 }
  39
  40 void AnimationRunner::Stop() {
  41         timer = app::Timer<Uint32>();
  42 }
  43
  44 bool AnimationRunner::Started() const {
  45         return timer.Started();
  46 }
  47
  48 bool AnimationRunner::Running() const {
  49         return animation
  50                         && timer.Running()
  51                         && (animation->Repeat()
  52                                         || timer.Iteration() < animation->NumFrames());
  53 }
  54
  55 bool AnimationRunner::Finished() const {
  56         return Started() && !Running();
  57 }
  58
  59 bool AnimationRunner::JustFinished() const {
  60         return animation
  61                         && timer.JustHit()
  62                         && timer.Iteration() == animation->NumFrames();
  63 }
  64
  65
  66 void AnimationRunner::Draw(SDL_Surface *dest, geometry::Vector<int> position) const {
  67         GetSprite()->Draw(dest,
  68                         position + animation->Offset(Frame()),
  69                         animation->Col(Frame()) + ColOffset(),
  70                         animation->Row(Frame()) + RowOffset());
  71 }
  72
  73 void AnimationRunner::DrawTopRight(SDL_Surface *dest, geometry::Vector<int> position) const {
  74         geometry::Vector<int> offset(-GetSprite()->Width(), 0);
  75         Draw(dest, position + offset);
  76 }
  77
  78 void AnimationRunner::DrawCenter(SDL_Surface *dest, geometry::Vector<int> position) const {
  79         Draw(dest, position - (GetSprite()->Size() / 2));
  80 }
  81
  82 void AnimationRunner::DrawCenterBottom(SDL_Surface *dest, geometry::Vector<int> position) const {
  83         geometry::Vector<int> offset(-GetSprite()->Width() / 2, -GetSprite()->Height());
  84         Draw(dest, position + offset);
  85 }
  86
  87 int AnimationRunner::Frame() const {
  88         return Running()
  89                         ? ((timer.Iteration() + frameShift) % animation->NumFrames())
  90                         : 0;
  91 }
  92
  93
  94 }