Add level transitions

app_file.c

@@ -68,7 +68,7 @@ static void _app_LevelCommand(App *app, char *cmd) {
 		c = TOKEN_DOUBLE;
 		d = TOKEN_DOUBLE;
 
-		Entity *e = entity_Create(app->entity, NULL);
+		Entity *e = entity_Create(app->entity, cmd);
 		ADD_COMPONENT(e, hitbox);
 		e->hitbox->box   = box2(a, b, c, d);
 		e->hitbox->fixed = true;
@@ -80,7 +80,7 @@ static void _app_LevelCommand(App *app, char *cmd) {
 		a = TOKEN_DOUBLE;
 		b = TOKEN_DOUBLE;
 
-		Entity *e = entity_Create(app->entity, NULL);
+		Entity *e = entity_Create(app->entity, cmd);
 		ADD_COMPONENT(e, player);
 		e->player->hazardRespawn = vec2(a, b);
 		ADD_COMPONENT(e, position);
@@ -101,7 +101,7 @@ static void _app_LevelCommand(App *app, char *cmd) {
 		e = TOKEN_DOUBLE;
 		f = TOKEN_DOUBLE;
 
-		Entity *en = entity_Create(app->entity, NULL);
+		Entity *en = entity_Create(app->entity, cmd);
 		misc_InstantiateHazardRespawn(app, en, box2(a, b, c, d), vec2(e, f));
 		entity_Commit(app->entity, en);
 	}
@@ -113,7 +113,7 @@ static void _app_LevelCommand(App *app, char *cmd) {
 		c = TOKEN_DOUBLE;
 		d = TOKEN_DOUBLE;
 
-		Entity *e = entity_Create(app->entity, NULL);
+		Entity *e = entity_Create(app->entity, cmd);
 		misc_InstantiateHazard(app, e, box2(a, b, c, d));
 		entity_Commit(app->entity, e);
 	}
@@ -125,7 +125,7 @@ static void _app_LevelCommand(App *app, char *cmd) {
 		c = TOKEN_DOUBLE;
 		d = TOKEN_DOUBLE;
 
-		Entity *e      = entity_Create(app->entity, NULL);
+		Entity *e      = entity_Create(app->entity, cmd);
 		char   *bundle = TOKEN;
 		if (bundle != NULL)
 			e->render = render_NewComponent(app, bundle);
@@ -147,9 +147,17 @@ static void _app_LevelCommand(App *app, char *cmd) {
 	}
 
 	CMD("LEVEL_TRANSITION") {
-		// TODO
+		double a, b, c, d;
-		// Entity *e = entity_Create(app->entity, NULL);
+		a                = TOKEN_DOUBLE;
-		// entity_Commit(app->entity, e);
+		b                = TOKEN_DOUBLE;
+		c                = TOKEN_DOUBLE;
+		d                = TOKEN_DOUBLE;
+		char *next_level = TOKEN;
+		if (next_level) {
+			Entity *e = entity_Create(app->entity, cmd);
+			misc_InstantiateChangeLevel(app, e, box2(a, b, c, d), next_level);
+			entity_Commit(app->entity, e);
+		}
 	}
 
 	CMD("CUTOFF") {
@@ -166,6 +174,7 @@ void _app_SwitchLevel(App *app) {
 		WARN("called when switch_level is NULL", 0);
 		return;
 	}
+	INFO("Switching level to %s", app->switch_level);
 
 	FILE *f = fopen(app->switch_level, "r");
 	if (!f) {

app_render.cpp

@@ -56,6 +56,8 @@ void app_Render(App *app) {
 			}
 			if (e->misc->trigger_flags & misc_Hazard)
 				setlinecolor(RGB(255, 0, 0));
+			if (e->misc->change_level)
+				setlinecolor(RGB(255, 255, 0));
 			Box2 box;
 			if (e->position)
 				box = camera_TransformBox2(app->camera, box2_Offset(e->misc->trigger, e->position->position));

entity.c

@@ -4,6 +4,7 @@
 #include "camera.h"
 #include "mapper_misc.h"
 #include "physics.h"
+#include "render_component.h"
 #include "util/assert.h"
 #include "util/tree.h"
 #include "util/vector.h"
@@ -98,6 +99,7 @@ static inline void _entity_Delete(System_Entity *sys, uintptr_t id) {
 	player_DeleteEntity(sys->super->player, e->id);
 	camera_DeleteEntity(sys->super->camera, e->id);
 
+
 	_entity_FreeMembers(e);
 
 	tree_Delete(sys->entities, node);

level1.txt

@@ -0,0 +1,4 @@
+CUTOFF 600
+HITBOX 60 350 1134 65
+TEXTBOX 541 191 178 166 info_plate_small_1 Work\sin\sProgress!!
+PLAYER 565 350

mapper_misc.c

@@ -18,6 +18,8 @@ void misc_DeleteComponent(Component_Misc *misc) {
 		}
 		if (misc->respawn_pos)
 			free(misc->respawn_pos);
+		if (misc->change_level)
+			free(misc->change_level);
 		free(misc);
 	}
 }
@@ -96,6 +98,22 @@ void misc_thinker_ToLive(App *app, Entity *e, Duration deltaTime) {
 	}
 }
 
+void misc_thinker_ChangeLevel(App *app, Entity *e, Duration deltaTime) {
+	if (!e->misc || !e->misc->change_level) {
+		WARN("called on an entity without misc or misc.change_level", 0);
+		e->thinker = NULL;
+		return;
+	}
+	if (app->player->player == NULL) // No player
+		return;
+	Component_Player *p         = app->player->player;
+	Box2              playerbox = physics_HitboxAbsolute(p->super->hitbox);
+
+	Box2 worldbox = ABSOLUTE_BOX(e, e->misc->trigger);
+	if (box2_Intersects(worldbox, playerbox, NULL))
+		app_QueueLoadLevel(app, e->misc->change_level);
+}
+
 
 // Utility functions for creating misc entities
 void misc_InstantiateTextbox(App *app, Entity *e, const char *text, Box2 trigger_box, float offset) {
@@ -140,3 +158,11 @@ void misc_InstantiateToLive(App *app, Entity *e, Duration duration, TimePoint si
 
 	e->thinker = &misc_thinker_ToLive;
 }
+
+void misc_InstantiateChangeLevel(App *app, Entity *e, Box2 trigger_box, const char *next_level) {
+	ASSERT(e->misc == NULL && "Instantiate must be called with e.misc not set");
+	e->misc               = zero_malloc(sizeof(Component_Misc));
+	e->misc->trigger      = trigger_box;
+	e->misc->change_level = copy_malloc(next_level);
+	e->thinker            = &misc_thinker_ChangeLevel;
+}

mapper_misc.h

@@ -40,6 +40,10 @@ void misc_thinker_Hazard(App *app, Entity *e, Duration deltaTime);
 // Kills itself after some time
 void misc_thinker_ToLive(App *app, Entity *e, Duration deltaTime);
 
+// Thinker for level transition
+void misc_thinker_ChangeLevel(App *app, Entity *e, Duration deltaTime);
+
+
 typedef enum {
 	misc_Hazard = 1 << 0, // Hazard, harms the player on contact
 } misc_TriggerFlags;
@@ -51,7 +55,8 @@ typedef struct {
 	Box2              trigger; // Relative to Position if exists; absolute otherwise
 	misc_TriggerFlags trigger_flags;
 	misc_Textbox     *textbox;
-	Vec2             *respawn_pos; // Set hazard respawn trigger
+	Vec2             *respawn_pos;  // Set hazard respawn trigger
+	char             *change_level; // Change level
 
 	TimePoint tolive; // Deletes itself after this time if it is not 0
 } Component_Misc;
@@ -80,6 +85,11 @@ void misc_InstantiateHazard(App *app, Entity *e, Box2 trigger_box);
 void misc_InstantiateToLive(App *app, Entity *e, Duration duration, TimePoint since);
 
 
+// Inserts components for change level
+// Creates misc & the thinker.
+void misc_InstantiateChangeLevel(App *app, Entity *e, Box2 trigger_box, const char *next_level);
+
+
 static inline Box2 misc_TextboxUpright(double width, double height) {
 	Box2 b = {
 		.lefttop = {

types.h

@@ -14,7 +14,8 @@ extern "C" {
 #define SCREEN_WIDTH  1600
 #define SCREEN_HEIGHT 900
 
-#define WARN(fmt, ...) fprintf(stderr, "[WARN][%s] " fmt "\n", __func__, __VA_ARGS__)
+#define WARN(fmt, ...) fprintf(stderr, "[WARN][%s] " fmt "\n", __func__, ##__VA_ARGS__)
+#define INFO(fmt, ...) fprintf(stderr, "[%s] " fmt "\n", __func__, ##__VA_ARGS__)
 
 
 static inline void *zero_malloc(size_t size) {