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zhangjiahao
2026-08-05 16:28:04 +08:00
父节点 21298d6f39
当前提交 b4be8743de
共修改 10 个文件，包含 393 行新增和 50 行删除
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src/pingpong_ball.cpp
+79 -23
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@@ -11,12 +11,24 @@
using namespace godot;
// ═══════════════════════════════════════════════════════
// 视觉颜色常量 — 以后替换素材时删除本段
// ═══════════════════════════════════════════════════════
static const Color BALL_COLOR = Color(1.0f, 1.0f, 1.0f);
void PingPongBall::_bind_methods() {
// 属性
ClassDB::bind_method(D_METHOD("get_speed"), &PingPongBall::get_speed);
ClassDB::bind_method(D_METHOD("set_speed", "value"), &PingPongBall::set_speed);
ClassDB::add_property("PingPongBall", PropertyInfo(Variant::FLOAT, "speed"), "set_speed", "get_speed");
ClassDB::bind_method(D_METHOD("get_initial_speed"), &PingPongBall::get_initial_speed);
ClassDB::bind_method(D_METHOD("set_initial_speed", "value"), &PingPongBall::set_initial_speed);
ClassDB::add_property("PingPongBall", PropertyInfo(Variant::FLOAT, "initial_speed"), "set_initial_speed", "get_initial_speed");
ClassDB::bind_method(D_METHOD("get_active"), &PingPongBall::get_active);
ClassDB::bind_method(D_METHOD("set_active", "value"), &PingPongBall::set_active);
// 方法
ClassDB::bind_method(D_METHOD("reset"), &PingPongBall::reset);
@@ -25,7 +37,9 @@ void PingPongBall::_bind_methods() {
}
PingPongBall::PingPongBall() {
speed = 400.0f;
speed = 350.0f;
initial_speed = 350.0f;
is_active = false;
}
PingPongBall::~PingPongBall() {
@@ -35,78 +49,98 @@ void PingPongBall::_ready() {
reset();
}
// ═══════════════════════════════════════════════════════
// 视觉层 — 球体 + 拖尾（几何体占位）
// 替换方法：删除本方法 → 添加 Sprite2D 子节点
// ═══════════════════════════════════════════════════════
void PingPongBall::_draw() {
// 画一个白色圆形表示球
draw_circle(Vector2(0.0f, 0.0f), 12.0f, Color(1.0f, 1.0f, 1.0f));
// 拖尾：从旧到新画渐隐圆
int trail_count = (int)trail_positions.size();
for (int i = 0; i < trail_count; i++) {
float alpha = (float)(i + 1) / (float)BALL_TRAIL_LENGTH * 0.3f;
float radius = BALL_RADIUS * (0.5f + 0.5f * (float)(i + 1) / (float)BALL_TRAIL_LENGTH);
draw_circle(trail_positions[i], radius, Color(1.0f, 1.0f, 1.0f, alpha));
}
// 球本体
draw_circle(Vector2(0.0f, 0.0f), BALL_RADIUS, BALL_COLOR);
}
void PingPongBall::_physics_process(double delta) {
queue_redraw();
if (!is_active) {
return;
}
// 更新拖尾
trail_positions.push_back(get_position());
if ((int)trail_positions.size() > BALL_TRAIL_LENGTH) {
trail_positions.erase(trail_positions.begin());
}
Vector2 velocity = direction * speed * (float)delta;
Ref<KinematicCollision2D> collision = move_and_collide(velocity);
if (collision.is_valid()) {
// 计算反弹方向
Vector2 normal = collision->get_normal();
direction = direction.bounce(normal);
// 根据碰撞法线判断碰撞对象类型
// 法线主要水平 → 碰到球拍（左右反弹）
// 法线主要垂直 → 碰到上下墙（上下反弹）
// 如果法线接近水平且球已经接近左右边界 → 得分
Object *collider = collision->get_collider();
if (collider) {
Node *collider_node = Object::cast_to<Node>(collider);
if (collider_node) {
StringName node_name = collider_node->get_name();
// 判断是不是球拍（球拍名字包含 "Paddle"）
// 碰到球拍
if (node_name.find("Paddle") != -1) {
// 碰到球拍，微调角度（根据击中位置）
Node2D *collider_2d = Object::cast_to<Node2D>(collider_node);
if (collider_2d) {
// 根据击中位置微调角度
float hit_offset = (get_global_position().y - collider_2d->get_global_position().y) / 60.0f;
hit_offset = CLAMP(hit_offset, -1.0f, 1.0f);
direction.y += hit_offset * 0.5f;
direction = direction.normalized();
// 速度递增
speed *= BALL_SPEED_INCREMENT;
if (speed > BALL_MAX_SPEED) {
speed = BALL_MAX_SPEED;
}
}
}
}
}
// 确保方向始终有效
direction = direction.normalized();
}
// 检测是否出界（得分判定）
// 得分判定
Viewport *viewport = get_viewport();
if (viewport) {
Vector2 screen_size = viewport->get_visible_rect().size;
Vector2 pos = get_global_position();
if (pos.x < -50.0f) {
// 球从左边出界，右边得分
emit_signal("scored", 1);
reset();
} else if (pos.x > screen_size.x + 50.0f) {
// 球从右边出界，左边得分
emit_signal("scored", 0);
reset();
}
// Y 方向边界限制（防止飞出屏幕）
if (pos.y < 0.0f) {
set_global_position(Vector2(pos.x, 0.0f));
// Y 边界限制
if (pos.y < BALL_RADIUS) {
set_global_position(Vector2(pos.x, BALL_RADIUS));
direction.y = std::abs(direction.y);
} else if (pos.y > screen_size.y) {
set_global_position(Vector2(pos.x, screen_size.y));
} else if (pos.y > screen_size.y - BALL_RADIUS) {
set_global_position(Vector2(pos.x, screen_size.y - BALL_RADIUS));
direction.y = -std::abs(direction.y);
}
}
}
void PingPongBall::reset() {
// 回到屏幕中央
Viewport *viewport = get_viewport();
if (viewport) {
Vector2 screen_size = viewport->get_visible_rect().size;
@@ -115,18 +149,32 @@ void PingPongBall::reset() {
set_global_position(Vector2(640.0f, 360.0f));
}
// 随机方向（-45° 到 45° 之间，向左或向右随机）
float angle = (UtilityFunctions::randf() - 0.5f) * Math_PI / 2.0f; // -45° ~ 45°
// 重置速度
speed = initial_speed;
// 清空拖尾
trail_positions.clear();
// 随机方向
float angle = (UtilityFunctions::randf() - 0.5f) * Math_PI / 2.0f;
int side = (UtilityFunctions::randf() > 0.5f) ? 1 : -1;
direction = Vector2((float)side * std::cos(angle), std::sin(angle)).normalized();
// 确保水平分量足够（避免球过于垂直）
// 确保水平分量足够
if (std::abs(direction.x) < 0.3f) {
direction.x = (direction.x > 0 ? 1.0f : -1.0f) * 0.3f;
direction = direction.normalized();
}
}
void PingPongBall::set_active(bool p_active) {
is_active = p_active;
}
bool PingPongBall::get_active() const {
return is_active;
}
void PingPongBall::set_speed(float p_speed) {
speed = p_speed;
}
@@ -134,3 +182,11 @@ void PingPongBall::set_speed(float p_speed) {
float PingPongBall::get_speed() const {
return speed;
}
void PingPongBall::set_initial_speed(float p_speed) {
initial_speed = p_speed;
}
float PingPongBall::get_initial_speed() const {
return initial_speed;
}