From 3c56ba6253de8f4bca750b61d08a22c5588b8ca5 Mon Sep 17 00:00:00 2001
From: realtradam <github@tradam.dev>
Date: Sat, 27 May 2023 14:58:54 -0400
Subject: added enemy self collision

---
 src/enemies.c | 71 ++++++++++++++++++++++++++++++++++++++++++++++++++++++-----
 src/enemies.h | 23 +++++++++++++++++++
 2 files changed, 89 insertions(+), 5 deletions(-)

(limited to 'src')

diff --git a/src/enemies.c b/src/enemies.c
index cd6c11c..e7de8c3 100644
--- a/src/enemies.c
+++ b/src/enemies.c
@@ -1,6 +1,6 @@
 #include "enemies.h"
 #include "bullet.h"
-#include <math.h>
+#include "cglm/vec2.h"
 
 static rodeo_collision_2d_world_t collision_enemies_world;
 static rodeo_texture_2d_t enemy_texture;
@@ -27,7 +27,16 @@ spawn_enemy(float x, float y)
 {
 	rodeo_collision_2d_world_item_t enemy_collision = (rodeo_collision_2d_world_item_t){.x = x, .y = y, .width = 26, .height = 38};
 	world_id id = rodeo_collision_2d_world_item_create(&collision_enemies_world, enemy_collision)->id;
-	return cvec_enemy_t_push(&enemies, (enemy_t){.hp = 100.0, .id = id});
+	return cvec_enemy_t_push(
+		&enemies,
+		(enemy_t){
+			.hp = 100.0,
+			.move_speed = 1.0f,
+			.behavior = enemy_ai_follow,
+			.firerate = 1.0f,
+			.weapon = enemy_weapon_basic,
+			.id = id
+		});
 }
 
 void
@@ -56,8 +65,37 @@ draw_enemies(void)
 }
 
 void
-move_enemies(void)
+enemy_overlap_resolver(
+	rodeo_collision_2d_world_item_t *a,
+	rodeo_collision_2d_world_item_t *b
+)
 {
+	enemy_t *enemy_a = get_enemy_by_id(a->id);
+	enemy_t *enemy_b = get_enemy_by_id(b->id);
+	vec2 direction;
+	glm_vec2_sub(
+		(vec2){b->x, b->y},
+		(vec2){a->x, a->y},
+		direction
+	);
+	glm_vec2_normalize(direction);
+	vec2 enemy_a_direction;
+	vec2 enemy_b_direction;
+
+	glm_vec2_scale(direction, -enemy_a->move_speed, enemy_a_direction);
+	glm_vec2_scale(direction, enemy_b->move_speed, enemy_b_direction);
+
+	a->dx += enemy_a_direction[0];
+	a->dy += enemy_a_direction[1];
+	b->dx += enemy_b_direction[0];
+	b->dy += enemy_b_direction[1];
+}
+
+void
+move_enemies(void)
+{	
+  
+   rodeo_collision_2d_world_compare_self(get_enemies_world(), enemy_overlap_resolver);
 	c_foreach(i, cvec_enemy_t, enemies) {
 		rodeo_collision_2d_world_item_t *enemy = rodeo_collision_2d_world_item_get_by_id(i.ref->id);
 		enemy->x += enemy->dx;
@@ -128,6 +166,7 @@ group_follow_target(rodeo_collision_2d_world_item_t *target)
 {
 	c_foreach(i, cvec_enemy_t, enemies) {
 		rodeo_collision_2d_world_item_t *enemy = rodeo_collision_2d_world_item_get_by_id(i.ref->id);
+		/*
 		float direction[2] = {
 			target->x - enemy->x,
 			target->y - enemy->y
@@ -138,7 +177,29 @@ group_follow_target(rodeo_collision_2d_world_item_t *target)
 
 		enemy->dx = direction[0];
 		enemy->dy = direction[1];
+		*/
+		vec2 source = {
+			enemy->x,
+			enemy->y
+		};
+		vec2 dest = {
+			target->x,
+			target->y
+		};
+		vec2 direction;
+		glm_vec2_sub(dest, source, direction);
+		glm_vec2_normalize(direction);
+		vec2 result;
+		glm_vec2_scale(direction, get_enemy_by_id(enemy->id)->move_speed, result);
+
+		rodeo_log(
+			rodeo_logLevel_info,
+			"%f, %f\n",
+			result[0],
+			result[1]
+		);
+
+		enemy->dx = result[0];
+		enemy->dy = result[1];
 	}
-	
-	
 }
diff --git a/src/enemies.h b/src/enemies.h
index d8e3c8f..bbf2405 100644
--- a/src/enemies.h
+++ b/src/enemies.h
@@ -2,11 +2,34 @@
 #include "rodeo/collision.h"
 #include "rodeo.h"
 
+typedef
+enum
+{
+	enemy_ai_nothing,
+	enemy_ai_follow,
+	//enemy_ai_runaway,
+}
+enemy_ai_behavior;
+
+typedef
+enum
+{
+	enemy_weapon_basic,
+	//enemy_weapon_fourplus,
+	//enemy_weapon_fourcross,
+}
+enemy_weapon_type;
+
 typedef
 struct
 {
     float hp;
     world_id id;
+	enemy_ai_behavior behavior;
+	float move_speed;
+	enemy_weapon_type weapon;
+	float firerate;
+
 } enemy_t;
 
 #define i_val enemy_t
-- 
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