src/effect_system.cpp


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#include "effect_system.h"

void EffectSystem::tick(double dt) {
  if (screenFade_ != screenFadeDest_) {
    screenFadeThus_ += dt;
    if (screenFadeThus_ >= screenFadeLength_) {
      screenFadeThus_ = screenFadeLength_;
    }

    screenFade_ = (screenFadeDest_ - screenFadeStart_) / screenFadeLength_ * screenFadeThus_ + screenFadeStart_;
  }

  if (mapFade_ != mapFadeDest_) {
    mapFadeThus_ += dt;
    if (mapFadeThus_ >= mapFadeLength_) {
      mapFadeThus_ = mapFadeLength_;
    }

    mapFade_ = (mapFadeDest_ - mapFadeStart_) / mapFadeLength_ * mapFadeThus_ + mapFadeStart_;
  }
}

void EffectSystem::fadeScreen(int length, double amount) {
  screenFadeStart_ = screenFade_;
  screenFadeDest_ = amount;
  screenFadeLength_ = length;
  screenFadeThus_ = 0;
}

void EffectSystem::fadeMap(int length, double amount) {
  mapFadeStart_ = mapFade_;
  mapFadeDest_ = amount;
  mapFadeLength_ = length;
  mapFadeThus_ = 0;
}