Spread loot to surrounding spaces

Instead of grouping loot into a sack it will now be "dropped" randomly
to surrounding spaces around the monster. To facilitate this sprite
interpolation has been added to the engine. Sprites can be interpolated
for position, dimension and rotation.

Introduces loot.c/loot.h which handle loot placement and drops. All
dropped items now interpolate to their destination. Documentation for
position functions has been updated and the function artifact_update has
been introduced.

Sound effects have been added to most item drops.

Adds debug.c for easier manual testing utilities.

Author: LiquidityC

assets/Sounds/FX/coin2.wav

@@ -1,6 +1,10 @@
 file(GLOB SOURCE_FILES CONFIGURE_DEPENDS *.c)
 target_sources(${PROJECT_NAME} PRIVATE ${SOURCE_FILES})
 
+if (DEBUG_BUILD)
+	target_sources(${PROJECT_NAME} PRIVATE debug/debug.c)
+endif ()
+
 if (STEAM)
 	target_sources(${PROJECT_NAME} PRIVATE steam/steamworks_api_wrapper.c)
 endif ()

assets/Sounds/FX/coin3.wav

@@ -198,7 +198,7 @@ artifact_create_random(Player *p, Uint8 level)
 void
 artifact_add_price(Artifact *a, unsigned int price)
 {
-	
+
 	Sprite *sprite = sprite_util_create_text_sprite("GUI/SDS_8x8.ttf",
 							8,
 							C_YELLOW,
@@ -310,6 +310,16 @@ artifact_copy(const Artifact *a)
 	return new;
 }
 
+void
+artifact_update(Artifact *a, UpdateData *ud)
+{
+	sprite_update(a->sprite, ud);
+	if (a->priceSprite)
+		a->priceSprite->pos = a->sprite->pos;
+	if (a->levelSprite)
+		a->levelSprite->pos = a->sprite->pos;
+}
+
 void
 artifact_render(Artifact *a, Camera *cam)
 {
@@ -319,11 +329,9 @@ artifact_render(Artifact *a, Camera *cam)
 	pos.y += 4;
 	particle_engine_sparkle(pos, DIM(24, 24), C_PURPLE, false);
 	if (a->priceSprite) {
-		a->priceSprite->pos = a->sprite->pos;
 		sprite_render(a->priceSprite, cam);
 	}
 	if (a->levelSprite) {
-		a->levelSprite->pos = a->sprite->pos;
 		sprite_render(a->levelSprite, cam);
 	}
 }

assets/Sounds/FX/flesh_drop1.wav

@@ -68,6 +68,9 @@ artifact_create(MagicalEffect);
 Artifact *
 artifact_copy(const Artifact*);
 
+void
+artifact_update(Artifact*, struct UpdateData*);
+
 void
 artifact_render(Artifact*, Camera*);
 

assets/Sounds/FX/flesh_drop2.wav

@@ -32,7 +32,7 @@ item_create(void)
 	item->collected = false;
 	item->openable = false;
 	item->opened = false;
-	m_strcpy(item->label, 50, "");
+	memset(item->label, '\0', 50);
 	item->price = 0.0;
 	item->value = 0.0;
 	item->items = NULL;
@@ -41,13 +41,16 @@ item_create(void)
 }
 
 void
-item_update(Item *item)
+item_update(Item *item, UpdateData *ud)
 {
+	sprite_update(item->sprite, ud);
+
 	LinkedList *subsprites = item->subsprites;
 	while (subsprites != NULL) {
 		Sprite *sprite = subsprites->data;
 		sprite->pos = item->sprite->pos;
 		sprite->pos.x += 15 - sprite->dim.width / 2;
+		sprite_update(sprite, ud);
 		subsprites = subsprites->next;
 	}
 }