Added map fadeouts

Screen fadeouts and map fadeouts are now handled by the effect system.

1 files changed, 35 insertions, 0 deletions

@@ -0,0 +1,35 @@
+#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;
+}