From ee655819d44307d974fb27e1fa04d079a3810d63 Mon Sep 17 00:00:00 2001
From: quou <quou@disroot.org>
Date: Mon, 30 Sep 2024 22:13:31 +1000
Subject: enemy

---
 1bitjam.c                         |   1 +
 Makefile                          |  13 ++-
 config.h                          |   5 +
 deathzone.c                       |  23 +++++
 enemy.c                           | 207 ++++++++++++++++++++++++++++++++++++++
 intermediate/demon_fly_left.anm   |   2 +
 intermediate/demon_fly_right.anm  |   2 +
 intermediate/demon_idle_left.anm  |   5 +
 intermediate/demon_idle_right.anm |   5 +
 intermediate/demon_jump_left.anm  |   5 +
 intermediate/demon_jump_right.anm |   5 +
 intermediate/demon_walk_left.anm  |   5 +
 intermediate/demon_walk_right.anm |   5 +
 intermediate/npc.bmp              | Bin 0 -> 37002 bytes
 map.c                             |   3 +
 obj.h                             |  35 +++++++
 player.c                          |  10 +-
 world.c                           |  39 +++++++
 world.h                           |  24 ++++-
 19 files changed, 390 insertions(+), 4 deletions(-)
 create mode 100644 deathzone.c
 create mode 100644 enemy.c
 create mode 100644 intermediate/demon_fly_left.anm
 create mode 100644 intermediate/demon_fly_right.anm
 create mode 100644 intermediate/demon_idle_left.anm
 create mode 100644 intermediate/demon_idle_right.anm
 create mode 100644 intermediate/demon_jump_left.anm
 create mode 100644 intermediate/demon_jump_right.anm
 create mode 100644 intermediate/demon_walk_left.anm
 create mode 100644 intermediate/demon_walk_right.anm
 create mode 100644 intermediate/npc.bmp

diff --git a/1bitjam.c b/1bitjam.c
index 8c63aa5..4cbd93e 100644
--- a/1bitjam.c
+++ b/1bitjam.c
@@ -27,6 +27,7 @@ int entrypoint(int argc, const char** argv, Arena* m) {
 	world = arena_alloc(m, sizeof world);
 	init_world(world);
 	generate_floor(&world->map, 0);
+	inst_enemy(world, enemy_demon, 100 << fbits, 100 << fbits);
 	while (a->o) {
 		fps_begin(&f);
 		while (f.now >= f.next && a->o) {
diff --git a/Makefile b/Makefile
index 7be7f78..c0a7b45 100644
--- a/Makefile
+++ b/Makefile
@@ -46,6 +46,8 @@ sources = \
 	1bitjam.c \
 	animation.c \
 	asset.c \
+	deathzone.c \
+	enemy.c \
 	map.c \
 	maths.c \
 	memory.c \
@@ -59,11 +61,20 @@ sources = \
 
 image_sources = \
 	$(int_dir)/arms.bmp \
+	$(int_dir)/npc.bmp \
 	$(int_dir)/guy.bmp \
 	$(int_dir)/map.bmp \
 	$(int_dir)/mask.bmp \
 
 anim_sources = \
+	$(int_dir)/demon_fly_left.anm \
+	$(int_dir)/demon_fly_right.anm \
+	$(int_dir)/demon_idle_left.anm \
+	$(int_dir)/demon_idle_right.anm \
+	$(int_dir)/demon_jump_left.anm \
+	$(int_dir)/demon_jump_right.anm \
+	$(int_dir)/demon_walk_left.anm \
+	$(int_dir)/demon_walk_right.anm \
 	$(int_dir)/guy_fall_left.anm \
 	$(int_dir)/guy_fall_right.anm \
 	$(int_dir)/guy_idle_left.anm \
@@ -74,8 +85,8 @@ anim_sources = \
 	$(int_dir)/guy_run_right.anm \
 	$(int_dir)/guy_slash_left.anm \
 	$(int_dir)/guy_slash_right.anm \
-	$(int_dir)/slash_right.anm \
 	$(int_dir)/slash_left.anm \
+	$(int_dir)/slash_right.anm \
 
 objects    = $(sources:%.c=%.o)
 images     = $(image_sources:$(int_dir)/%.bmp=$(data_dir)/%.img)
diff --git a/config.h b/config.h
index 2fc4561..f2b0699 100644
--- a/config.h
+++ b/config.h
@@ -38,5 +38,10 @@
 #define player_shoot_cooldown 20
 #define player_attack_frames 10
 #define player_lunge_force (f1)
+#define player_slash_damage 1
+
+#define enemy_demon_move_force 32
+#define enemy_demon_attack_dist f1
+#define enemy_demon_jump_force (5 << fbits)
 
 #endif
diff --git a/deathzone.c b/deathzone.c
new file mode 100644
index 0000000..cbc0215
--- /dev/null
+++ b/deathzone.c
@@ -0,0 +1,23 @@
+#include "obj.h"
+
+void init_deathzone(
+	Deathzone* d,
+	const Rect* r,
+	int vx,
+	int vy,
+	int hp,
+	int life,
+	int friendly
+) {
+	d->r = *r;
+	d->vx = vx;
+	d->vy = vy;
+	d->hp = hp;
+	d->life = life;
+	d->friendly = friendly;
+}
+
+int update_deathzone(Deathzone* d) {
+	d->life--;
+	return d->life <= 0;
+}
diff --git a/enemy.c b/enemy.c
new file mode 100644
index 0000000..bc0bbba
--- /dev/null
+++ b/enemy.c
@@ -0,0 +1,207 @@
+#include "animation.h"
+#include "asset.h"
+#include "config.h"
+#include "maths.h"
+#include "obj.h"
+#include "physics.h"
+#include "render.h"
+#include "world.h"
+
+enum {
+	enemy_state_patrol,
+	enemy_state_approach,
+	enemy_state_approach2,
+	enemy_state_attack
+};
+
+int get_enemy_hp(Enemy_Type t) {
+	switch (t) {
+		case enemy_demon:
+			return 3;
+	}
+	return 0;
+}
+
+void get_enemy_rect(Enemy_Type t, Rect* d) {
+	switch (t) {
+		case enemy_demon:
+			d->x = 2;
+			d->y = 2;
+			d->w = 12;
+			d->h = 14;
+			break;
+	}
+}
+
+void init_enemy(Enemy* e, Enemy_Type t, int x, int y) {
+	e->t = t;
+	e->x = x;
+	e->y = y;
+	e->vx = 0;
+	e->vy = 0;
+	e->hp = get_enemy_hp(t);
+	e->frame = 0;
+	e->anim = asset_id_demon_idle_left_anm;
+	e->face = face_left;
+	e->state = enemy_state_patrol;
+}
+
+void update_enemy_anim(Enemy* e) {
+	int done;
+	const Animation* anim = get_animation(e->anim);
+	done = update_anim(anim, &e->frame, &e->rect);
+	if (
+		done &&
+		e->t == enemy_demon &&
+		e->state == enemy_state_approach
+	) {
+		e->state = enemy_state_approach2;
+	}
+}
+
+void update_enemy_phys(Enemy* e, const Map* map) {
+	Rect r;
+	get_enemy_rect(e->t, &r);
+	r.x <<= fbits;
+	r.y <<= fbits;
+	r.w <<= fbits;
+	r.h <<= fbits;
+	update_body(
+		map,
+		&e->x,
+		&e->y,
+		&e->vx,
+		&e->vy,
+		&e->grounded,
+		&e->headbutted,
+		&e->on_ramp,
+		&r
+	);
+}
+
+void update_enemy_hurt(Enemy* e, const World* w) {
+	Rect a;
+	int i;
+	get_enemy_rect(e->t, &a);
+	a.x += e->x >> fbits;
+	a.y += e->y >> fbits;
+	for (i = 0; i < w->deathzone_count; i++) {
+		const Deathzone* dz = &w->deathzones[i];
+		if (rects_overlap(&a, &dz->r)) {
+			e->hp -= dz->hp;
+			e->vx -= dz->vx;
+			e->vy -= dz->vy;
+		}
+	}
+}
+
+int tile_at(const Map* m, int x, int y) {
+	return
+		x < 0 ||
+		y < 0 ||
+		x >= map_w ||
+		y >= map_h ||
+		m->collision[x + y * map_w] == 1;
+}
+
+void update_demon_move(Enemy* e, const World* w) {
+	int nanim = e->anim;
+	const Player* p = &w->player;
+	if (e->state == enemy_state_patrol) {
+		int dx = e->x - p->x;
+		int dy = e->y - p->y;
+		int dx2 = dx >> fbits;
+		int dy2 = dy >> fbits;
+		int dist = fxsqrt(dx * dx2 + dy * dy2) >> fbits;
+		if (e->grounded < 3) {
+			int tx, ty =
+				((e->y >> fbits) - (map_tile_size >> 1)) /
+				map_tile_size;
+			int ty2 = ty + 2;
+			if (e->face == face_left) {
+				tx = (
+					(e->x >> fbits) - (map_tile_size >> 1)) /
+					map_tile_size;
+			} else {
+				tx = (
+					(e->x >> fbits) + map_tile_size +
+					(map_tile_size >> 1)) /
+					map_tile_size;
+			}
+			if (
+				tile_at(&w->map, tx, ty) ||
+				(ty2 < map_h && !tile_at(&w->map, tx, ty2))
+			)
+				e->face = !e->face;
+			if (e->face == face_left) {
+				e->vx -= enemy_demon_move_force;
+			} else {
+				e->vx += enemy_demon_move_force;
+			}
+		}
+		if (dist < enemy_demon_attack_dist) {
+			e->state = enemy_state_approach;
+		}
+	} else if (e->state == enemy_state_approach) {
+		if (p->x < e->x)
+			e->face = face_left;
+		else
+			e->face = face_right;
+	} else if (e->state == enemy_state_approach2) {
+		if (e->grounded < 3) {
+			e->vx = (p->x - e->vx) / 100;
+			if (e->face == face_left)
+				e->vx = -e->vx;
+			e->vy = -enemy_demon_jump_force;
+			e->grounded = 100;
+			e->state = enemy_state_attack;
+		}
+	} else if (e->state == enemy_state_attack) {
+		if (e->grounded < 3) {
+			e->state = enemy_state_patrol;
+		}
+	}
+	switch (e->face) {
+		case face_left:
+			nanim =
+				e->state == enemy_state_patrol?
+					asset_id_demon_walk_left_anm:
+				e->state == enemy_state_approach?
+					asset_id_demon_jump_left_anm:
+				asset_id_demon_idle_left_anm;
+			break;
+		case face_right:
+			nanim =
+				e->state == enemy_state_patrol?
+					asset_id_demon_walk_right_anm:
+				e->state == enemy_state_approach?
+					asset_id_demon_jump_right_anm:
+				asset_id_demon_idle_right_anm;
+			break;
+	}
+	if (nanim != e->anim) {
+		e->frame = 0;
+		e->anim = nanim;
+	}
+}
+
+void update_enemy_move(Enemy* e, const World* w) {
+	switch (e->t) {
+		case enemy_demon:
+			update_demon_move(e, w);
+			break;
+	}
+}
+
+int update_enemy(Enemy* e, World* w) {
+	update_enemy_anim(e);
+	update_enemy_hurt(e, w);
+	update_enemy_move(e, w);
+	update_enemy_phys(e, &w->map);
+	return e->hp <= 0;
+}
+
+void ren_enemy(const Enemy* e, struct Renderer* r) {
+	const Bitmap* b = get_bitmap(asset_id_npc_img);
+	ren_map(r, e->x >> fbits, e->y >> fbits, &e->rect, b);
+}
diff --git a/intermediate/demon_fly_left.anm b/intermediate/demon_fly_left.anm
new file mode 100644
index 0000000..686a35f
--- /dev/null
+++ b/intermediate/demon_fly_left.anm
@@ -0,0 +1,2 @@
+1
+{ 64, 64, 16, 16 }
diff --git a/intermediate/demon_fly_right.anm b/intermediate/demon_fly_right.anm
new file mode 100644
index 0000000..8a62ff3
--- /dev/null
+++ b/intermediate/demon_fly_right.anm
@@ -0,0 +1,2 @@
+1
+{ 64, 80, 16, 16 }
diff --git a/intermediate/demon_idle_left.anm b/intermediate/demon_idle_left.anm
new file mode 100644
index 0000000..0a4ac8d
--- /dev/null
+++ b/intermediate/demon_idle_left.anm
@@ -0,0 +1,5 @@
+15
+{ 0,  0, 16, 16 }
+{ 16, 0, 16, 16 }
+{ 32, 0, 16, 16 }
+{ 48, 0, 16, 16 }
diff --git a/intermediate/demon_idle_right.anm b/intermediate/demon_idle_right.anm
new file mode 100644
index 0000000..a8edeb0
--- /dev/null
+++ b/intermediate/demon_idle_right.anm
@@ -0,0 +1,5 @@
+15
+{ 0,  16, 16, 16 }
+{ 16, 16, 16, 16 }
+{ 32, 16, 16, 16 }
+{ 48, 16, 16, 16 }
diff --git a/intermediate/demon_jump_left.anm b/intermediate/demon_jump_left.anm
new file mode 100644
index 0000000..da710dd
--- /dev/null
+++ b/intermediate/demon_jump_left.anm
@@ -0,0 +1,5 @@
+7
+{ 0,  64, 16, 16 }
+{ 16, 64, 16, 16 }
+{ 32, 64, 16, 16 }
+{ 48, 64, 16, 16 }
diff --git a/intermediate/demon_jump_right.anm b/intermediate/demon_jump_right.anm
new file mode 100644
index 0000000..bb01bbd
--- /dev/null
+++ b/intermediate/demon_jump_right.anm
@@ -0,0 +1,5 @@
+7
+{ 0,  80, 16, 16 }
+{ 16, 80, 16, 16 }
+{ 32, 80, 16, 16 }
+{ 48, 80, 16, 16 }
diff --git a/intermediate/demon_walk_left.anm b/intermediate/demon_walk_left.anm
new file mode 100644
index 0000000..8a86a59
--- /dev/null
+++ b/intermediate/demon_walk_left.anm
@@ -0,0 +1,5 @@
+15
+{ 0,  32, 16, 16 }
+{ 16, 32, 16, 16 }
+{ 32, 32, 16, 16 }
+{ 16, 32, 16, 16 }
diff --git a/intermediate/demon_walk_right.anm b/intermediate/demon_walk_right.anm
new file mode 100644
index 0000000..5312b7a
--- /dev/null
+++ b/intermediate/demon_walk_right.anm
@@ -0,0 +1,5 @@
+15
+{ 0,  48, 16, 16 }
+{ 16, 48, 16, 16 }
+{ 32, 48, 16, 16 }
+{ 16, 48, 16, 16 }
diff --git a/intermediate/npc.bmp b/intermediate/npc.bmp
new file mode 100644
index 0000000..9a961a7
Binary files /dev/null and b/intermediate/npc.bmp differ
diff --git a/map.c b/map.c
index 855f636..c2d9e0d 100644
--- a/map.c
+++ b/map.c
@@ -34,6 +34,9 @@ void generate_floor(Map* m, int seed) {
 	set(2, 11);
 	set(3, 11);
 	set(4, 11);
+	set(6, 11);
+	set(7, 11);
+	set(8, 11);
 	set(19, 13);
 	set(19, 12);
 	set(19, 11);
diff --git a/obj.h b/obj.h
index 57172f5..8824a2d 100644
--- a/obj.h
+++ b/obj.h
@@ -43,4 +43,39 @@ void init_particle(Particle* p, int x, int y, int anim, int bmp);
 int update_particle(Particle* p);
 void ren_particle(const Particle* p, struct Renderer* r);
 
+typedef enum {
+	enemy_demon
+} Enemy_Type;
+
+typedef struct {
+	Enemy_Type t;
+	int x, y, vx, vy;
+	int hp, frame, anim;
+	int grounded, headbutted, on_ramp;
+	int state;
+	Face face;
+	Rect rect;
+} Enemy;
+
+void init_enemy(Enemy* e, Enemy_Type t, int x, int y);
+int update_enemy(Enemy* e, struct World* w);
+void ren_enemy(const Enemy* e, struct Renderer* r);
+
+typedef struct {
+	Rect r;
+	int vx, vy;
+	int hp, life, friendly;
+} Deathzone;
+
+void init_deathzone(
+	Deathzone* d,
+	const Rect* r,
+	int vx,
+	int vy,
+	int hp,
+	int life,
+	int friendly
+);
+int update_deathzone(Deathzone* d);
+
 #endif
diff --git a/player.c b/player.c
index 67a4817..e965c66 100644
--- a/player.c
+++ b/player.c
@@ -94,18 +94,26 @@ void update_player_move(Player* p, const App* a, World* w) {
 		play_sound(500);
 	}
 	if (p->cooldown <= 0 && btn_just_pressed(a, btn_shoot)) {
-		int sx, sy;
+		int sx, sy, vx;
 		int anim;
+		Rect dz;
 		if (p->face == face_left) {
 			anim = asset_id_slash_left_anm;
 			sx = (p->x >> fbits) - 45;
 			sy = (p->y >> fbits);
+			vx = f1 * 3;
 		} else {
 			anim = asset_id_slash_right_anm;
 			sx = (p->x >> fbits) + 16;
 			sy = (p->y >> fbits);
+			vx = -f1 * 3;
 		}
+		dz.x = sx;
+		dz.y = sy;
+		dz.w = 45;
+		dz.h = 17;
 		inst_particle(w, sx, sy, anim, asset_id_arms_img);
+		inst_deathzone(w, &dz, vx, 0, player_slash_damage, 1, 1);
 		p->cooldown = 10;
 		p->slashing = get_animation(asset_id_guy_slash_left_anm)->fc;
 	}
diff --git a/world.c b/world.c
index e7777fd..aba9bfb 100644
--- a/world.c
+++ b/world.c
@@ -3,6 +3,8 @@
 
 void init_world(World* w) {
 	w->particle_count = 0;
+	w->enemy_count = 0;
+	w->deathzone_count = 0;
 	init_player(&w->player);
 }
 
@@ -20,12 +22,47 @@ Particle* inst_particle(
 	return p;
 }
 
+Enemy* inst_enemy(
+	World* w,
+	Enemy_Type t,
+	int x,
+	int y
+) {
+	Enemy* e;
+	assert(w->enemy_count < max_enemies);
+	e = &w->enemies[w->enemy_count++];
+	init_enemy(e, t, x, y);
+	return e;
+}
+
+Deathzone* inst_deathzone(
+	World* w,
+	const Rect* r,
+	int vx,
+	int vy,
+	int hp,
+	int life,
+	int friendly
+) {
+	Deathzone* d;
+	assert(w->deathzone_count < max_deathzones);
+	d = &w->deathzones[w->deathzone_count++];
+	init_deathzone(d, r, vx, vy, hp, life, friendly);
+	return d;
+}
+
 void update_world(World* w, const App* a) {
 	int i;
 	update_player(&w->player, w, a, &w->map);
 	for (i = w->particle_count - 1; i >= 0; i--)
 		if (update_particle(&w->particles[i]))
 			w->particles[i] = w->particles[--w->particle_count];
+	for (i = w->enemy_count - 1; i >= 0; i--)
+		if (update_enemy(&w->enemies[i], w))
+			w->enemies[i] = w->enemies[--w->enemy_count];
+	for (i = w->deathzone_count - 1; i >= 0; i--)
+		if (update_deathzone(&w->deathzones[i]))
+			w->deathzones[i] = w->deathzones[--w->deathzone_count];
 }
 
 void ren_world(const World* w, struct Renderer* r) {
@@ -34,4 +71,6 @@ void ren_world(const World* w, struct Renderer* r) {
 	render_map(&w->map, r);
 	for (i = 0; i < w->particle_count; i++)
 		ren_particle(&w->particles[i], r);
+	for (i = 0; i < w->enemy_count; i++)
+		ren_enemy(&w->enemies[i], r);
 }
diff --git a/world.h b/world.h
index bd3df31..14e2447 100644
--- a/world.h
+++ b/world.h
@@ -5,12 +5,17 @@
 #include "obj.h"
 
 #define max_particles 32
+#define max_enemies 16
+#define max_deathzones 16
 
 struct Renderer;
 
 typedef struct World {
 	Particle particles[max_particles];
-	int particle_count;
+	Enemy enemies[max_enemies];
+	Deathzone deathzones[max_deathzones];
+	int particle_count, enemy_count;
+	int deathzone_count;
 	Player player;
 	Map map;
 } World;
@@ -23,7 +28,22 @@ Particle* inst_particle(
 	int anim,
 	int bmp
 );
-void update_world(World* w, const App* a);
+Enemy* inst_enemy(
+	World* w,
+	Enemy_Type t,
+	int x,
+	int y
+);
+Deathzone* inst_deathzone(
+	World* w,
+	const Rect* r,
+	int vx,
+	int vy,
+	int hp,
+	int life,
+	int friendly
+);
+void update_world(World* w, const struct App* a);
 void ren_world(const World* w, struct Renderer* r);
 
 #endif
-- 
cgit v1.2.3-54-g00ecf