added enemy spawns and movement

CMakeLists.txt

@@ -16,6 +16,7 @@ FetchContent_Declare(
 FetchContent_MakeAvailable(raylib)
 
 add_executable(isaac__ main.cpp
-        types.h)
+        types.h
+)
 target_link_libraries(${PROJECT_NAME} PUBLIC raylib)
 target_include_directories(${PROJECT_NAME} PUBLIC ${raylib_public_headers})

main.cpp

@@ -1,4 +1,6 @@
+#include <mutex>
 #include <print>
+#include <random>
 #include <raylib.h>
 #include <thread>
 
@@ -20,6 +22,12 @@ float tear_radius = 10.0f;
 double last_fired = 0;
 double fire_rate = .5;
 
+std::random_device dev;
+std::mt19937 rng(dev());
+
+std::mutex enemy_mutex;
+float enemy_max_speed = 5.0;
+float enemy_radius = 50.0;
 Enemy enemies[100] = {};
 
 Vector2 Player::center() const noexcept {
@@ -76,7 +84,34 @@ struct EnemySpawner {
                 const auto start = std::chrono::steady_clock::now();
 
                 if (!paused.load()) {
-                    std::print("Running at {}\n", start.time_since_epoch().count());
+                    std::lock_guard lock(enemy_mutex);
+                    const auto num = static_cast<float>(rng()) / static_cast<float>(std::mt19937::max());
+                    const auto dir = static_cast<float>(rng()) / static_cast<float>(std::mt19937::max());
+
+                    for (auto &[center, radius, moving, alive]: enemies) {
+                        if (alive) continue;
+                        alive = true;
+                        radius = enemy_radius;
+                        if (num < 0.25) {
+                            center = {.x = static_cast<float>(screen_width) / 2, .y = 0};
+                            moving = {.x = (dir - 1) * 2, .y = 1};
+                        } else if (0.25 <= num && num < 0.5) {
+                            center = {.x = static_cast<float>(screen_width) / 2, .y = static_cast<float>(screen_height)};
+                            moving = {.x = (dir - 1) * 2, .y = -1};
+                        } else if (0.5 <= num && num < 0.75) {
+                            center = {.x = 0, .y = static_cast<float>(screen_height) / 2};
+                            moving = {.x = 1, .y = (dir - 1) * 2};
+                        } else {
+                            center = {.x = static_cast<float>(screen_width), .y = static_cast<float>(screen_height) / 2};
+                            moving = {.x = -1, .y = (dir - 1) * 2};
+                        }
+
+                        const auto speed_ratio = static_cast<float>(rng()) / static_cast<float>(std::mt19937::max());
+                        const auto speed = speed_ratio * enemy_max_speed;
+                        moving = Vector2Scale(moving, speed);
+
+                        break;
+                    }
                 }
 
                 auto next = start + std::chrono::seconds(rate_secs);
@@ -140,7 +175,7 @@ int main() {
     InitWindow(800, 600, "Isaac++");
     SetTargetFPS(60);
 
-    EnemySpawner spawner{10};
+    EnemySpawner spawner{3};
     spawner.start();
     player.x = 10;
     player.y = 10;
@@ -184,10 +219,8 @@ int main() {
 
         update_tears();
 
-
         BeginDrawing();
         ClearBackground(RAYWHITE);
-        DrawText("Hello", 100, 100, 20, RED);
         DrawRectangleRec(player, BLUE);
 
         for (const auto wall: walls) {
@@ -196,7 +229,14 @@ int main() {
 
         for (const auto tear: tears) {
             if (tear.active) {
-                DrawCircle(static_cast<int>(tear.center.x), static_cast<int>(tear.center.y), tear_radius, SKYBLUE);
+                DrawCircleV(tear.center, tear_radius, SKYBLUE);
+            }
+        }
+
+        for (auto& enemy: enemies) {
+            if (enemy.alive) {
+                enemy.center = Vector2Add(enemy.center, enemy.moving);
+                DrawCircleV(enemy.center, enemy.radius, RED);
             }
         }