Emote Location

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Obsolete: tModLoader now has a native hook for changing the emote location along with the chat bubble location! Use ModNPC.EmoteBubblePosition(ref Vector2 position, ref SpriteEffects spriteEffects) or GlobalNPC.EmoteBubblePosition(NPC npc, ref Vector2 position, ref SpriteEffects spriteEffects)

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We can change the location that the emote will appear on our Town NPC. This may be desirable if your Town NPC is a different size than the standard player size. To do this, we need to use a Detour. This is an advanced technique, make sure you read about Detours here. tModLoader does not have a built in hook for this that we can override, so a detour is necessary.

public override void Load()
{
	// Here we load our other hook. Note: You can have only one Load() override in the same class.
	Terraria.GameContent.UI.On_EmoteBubble.GetPosition += EmoteBubble_Hook_GetPosition;
}

private delegate void orig_EmoteBubble_GetPosition(EmoteBubble self);

private static Vector2 EmoteBubble_Hook_GetPosition(Terraria.GameContent.UI.On_EmoteBubble.orig_GetPosition orig, EmoteBubble self, out SpriteEffects effect)
{
	// Only change for our Town NPC.
	if (self.anchor.type == WorldUIAnchor.AnchorType.Entity && self.anchor.entity is NPC npc && npc.type == ModContent.NPCType<TutorialTownNPC>())
	{
		// Flip the bubble to the opposite side of where it is normally.
		effect = ((self.anchor.entity.direction == -1) ? SpriteEffects.FlipHorizontally : SpriteEffects.None);

		// Move it to the front of the entity and move it out more.
		float distance = 2f; // The 0.75f multiplier in the original code moves it closer (bigger numbers move it away).

		return new Vector2(self.anchor.entity.Top.X, self.anchor.entity.VisualPosition.Y) + new Vector2((float)(self.anchor.entity.direction * self.anchor.entity.width), distance) - Main.screenPosition;
		
		// Original vanilla code:
		// effect = ((anchor.entity.direction != -1) ? SpriteEffects.FlipHorizontally : SpriteEffects.None);
		// return new Vector2(anchor.entity.Top.X, anchor.entity.VisualPosition.Y) + new Vector2((float)(-anchor.entity.direction * anchor.entity.width) * 0.75f, 2f) - Main.screenPosition;
	}

	// Do the original code if not our Town NPC.
	return orig(self, out effect);
}

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