Cool text animation thingy

1 files changed, 40 insertions, 8 deletions

diff --git a/src/ui.c b/src/ui.c
index b8451e5..4035b44 100644
--- a/src/ui.c
+++ b/src/ui.c
@@ -18,7 +18,7 @@ void resizeInteractionChat(InteractionChat* chat, const Settings* settings)
 
 void initInteractionChat(InteractionChat* chat, const Settings* settings)
 {
-  memset(&chat->text, 0, INTERACTION_CHAT_MAX * sizeof(char));
+  clearInteractionChat(chat);
   chat->visible = false;
   chat->entityId = ENTITY_NONE;
 
@@ -37,17 +37,37 @@ void hideInteractionChat(InteractionChat* chat)
 
 void setInteractionChat(InteractionChat* chat, const char* text)
 {
-  strncpy(chat->text, text, INTERACTION_CHAT_MAX * sizeof(char) - 1);
+  strncpy(chat->text, text, INTERACTION_CHAT_MAX - 1);
+  chat->textSize = getStringLength(text, INTERACTION_CHAT_MAX);
+  chat->displayUpTo = 0;
+  chat->lastCharacterUpdate = GetTime();
 }
 
 void writeToInteractionChat(InteractionChat* chat, const char* text)
 {
-  strncat(chat->text, text, INTERACTION_CHAT_MAX * sizeof(char) - 1);
+  strncat(chat->text, text, INTERACTION_CHAT_MAX - 1);
+  chat->textSize += getStringLength(text, INTERACTION_CHAT_MAX);
+  chat->textSize %= INTERACTION_CHAT_MAX;
+  chat->lastCharacterUpdate = GetTime();
 }
 
 void clearInteractionChat(InteractionChat* chat)
 {
-  memset(&chat->text, 0, INTERACTION_CHAT_MAX * sizeof(char));
+  memset(&chat->text, 0, INTERACTION_CHAT_MAX);
+  memset(&chat->displayedText, 0, INTERACTION_CHAT_MAX);
+  chat->textSize = 0;
+  chat->displayUpTo = 0;
+}
+
+bool isInteractionChatAnimationDone(InteractionChat* chat)
+{
+  return chat->displayUpTo >= chat->textSize;
+}
+
+void endInteractionChatAnimation(InteractionChat* chat)
+{
+  chat->displayUpTo = chat->textSize;
+  strncpy(chat->displayedText, chat->text, chat->textSize);
 }
 
 void updateInteractionChat(InteractionChat* chat, Game* game)
@@ -72,6 +92,19 @@ void updateInteractionChat(InteractionChat* chat, Game* game)
   
   DrawRectangleLinesEx(chat->rect, lineThickness, BLACK);
 
+  // Do cool animation.
+  double currentTime = GetTime();
+  
+  if (chat->displayUpTo < chat->textSize &&
+      currentTime - chat->lastCharacterUpdate >=
+      game->settings.interactionChatAnimationSpeed)
+  {
+    chat->lastCharacterUpdate = currentTime;
+    chat->displayedText[chat->displayUpTo] = chat->text[chat->displayUpTo];
+    ++chat->displayUpTo;
+  }
+
+  // Draw text.
   if (chat->entityId != ENTITY_NONE)
   {
     DrawText(TextFormat("%s says:", getEntityName(chat->entityId)),
@@ -81,7 +114,7 @@ void updateInteractionChat(InteractionChat* chat, Game* game)
              WHITE);
   }
 
-  DrawText(chat->text,
+  DrawText(chat->displayedText,
            chat->rect.x + border,
            chat->rect.y + (border * 2.0) + fontSize,
            fontSize,
@@ -127,8 +160,7 @@ void setInteractionMenu(InteractionMenu* menu,
   
   for (int index = 0; index < itemCount; ++index)
   {
-    strncpy(menu->items[index], items[index],
-            INTERACTION_LABEL_MAX * sizeof(char) - 1);
+    strncpy(menu->items[index], items[index], INTERACTION_LABEL_MAX - 1);
   }
 }
 
@@ -136,7 +168,7 @@ void resetInteractionMenu(InteractionMenu* menu)
 {
   for (int index = 0; index < INTERACTION_MENU_MAX; ++index)
   {
-    memset(menu->items[index], 0, INTERACTION_LABEL_MAX * sizeof(char));
+    memset(menu->items[index], 0, INTERACTION_LABEL_MAX);
   }
 
   menu->itemCount = 0;