Spread loot to surrounding spaces (#101)

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.

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

@@ -0,0 +1,66 @@
+/*
+ * BreakHack - A dungeone crawler RPG
+ * Copyright (C) 2025  Linus Probert <linus.probert@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "debug.h"
+#include "../sprite.h"
+#include "../texturecache.h"
+
+static Sprite *sprite = NULL;
+
+void
+debug_update(UpdateData *ud)
+{
+	/* Kill a monster when clicked */
+	if (input_mousebutton_is_pressed(ud->input, MBUTTON_LEFT)) {
+		Position mpos = POS(ud->input->mouseX, ud->input->mouseY);
+
+		Position mat_pos = position_to_matrix_coords(&mpos);
+		Monster *monster = ud->matrix->spaces[mat_pos.x][mat_pos.y].monster;
+		if (monster) {
+			monster->stats.hp = 0;
+		} else {
+			if (sprite) {
+				sprite_destroy(sprite);
+			}
+			sprite = sprite_create();
+			sprite->textures[0] = texturecache_add("Items/Amulet.png");
+			sprite->clip = CLIP16(0, 0);
+			sprite->dim = DIM(4, 4);
+			sprite->pos = mpos;
+
+			Destination dest = {
+				.pos = POS(mpos.x + 64, mpos.y + 64),
+				.dim = DIM(32, 32),
+				.angle = 0.0f,
+				.time_ms = 400,
+			};
+
+			sprite_interpolate_to(sprite, &dest);
+		}
+	}
+
+	if (sprite) {
+		sprite_update(sprite, ud);
+	}
+}
+
+void
+debug_render(Camera *cam)
+{
+	if (sprite)
+		sprite_render(sprite, cam);
+}