完成玩家组件与状态机

src/game/component/state/idle_state.cpp

@@ -0,0 +1,50 @@
+#include "idle_state.h"
+#include "fall_state.h"
+#include "jump_state.h"
+#include "walk_state.h"
+#include "../player_component.h"
+#include "../../../engine/core/context.h"
+#include "../../../engine/input/input_manager.h"
+#include "../../../engine/component/physics_component.h"
+#include <spdlog/spdlog.h>
+
+namespace game::component::state {
+
+void IdleState::enter() {
+
+}
+
+void IdleState::exit() {
+
+}
+
+std::unique_ptr<PlayerState> IdleState::handleInput(engine::core::Context& context)
+{
+    auto input_manager = context.getInputManager();
+    // 如果按下了左右移动键，则切换到 WalkState
+    if (input_manager.isActionDown("move_left") || input_manager.isActionDown("move_right")) {
+        return std::make_unique<WalkState>(player_component_);
+    }
+
+    // 如果按下“jump”则切换到 JumpState
+    if (input_manager.isActionPressed("jump")) {
+        return std::make_unique<JumpState>(player_component_);
+    }
+    return nullptr;
+}
+
+std::unique_ptr<PlayerState> IdleState::update(float, engine::core::Context&)
+{
+    // 应用摩擦力(水平方向)
+    auto physics_component = player_component_->getPhysicsComponent();
+    auto friction_factor = player_component_->getFrictionFactor();
+    physics_component->velocity_.x *= friction_factor;
+
+    // 如果下方没有碰撞，则切换到 FallState
+    if (!physics_component->hasCollidedBelow()) {
+        return std::make_unique<FallState>(player_component_);
+    }
+    return nullptr;
+}
+
+} // namespace game::component::state