一、游戏的分析(之前没有接触过小游戏，制作的思维还停留在大型ARPG游戏大家共同协作的想法里，但是小游戏讲究小而全，大部分时间是一个人独立开发，所以需要迫使自己养成看到小游戏先拆分细化的思想)

二、一些必要的参数

台阶参数

1: 设置分辨率: 720x1280

2: 台阶的原点:

3: 配置好4个中心点,如果跳到就到4个中心点，否则就失败;

4: 编写代码获得中心点的位置，来初始化Player;

5: 斜率: 0.5560472, 与平行四边形相当;

6: 块开始的世界坐标的位置: (180， 350)

参数

1: 监听事件,开启蓄积能量, 2秒缩放到0.5;

2: 0.5秒内，scale变形到1;

3: 0.5秒内, 旋转一周;

4: 0.5秒内,跳跃到目的地;

5: 能量蓄积: 加速度: power: 600, 初始化: 150;

this.speed += dt * this.power;

this.jumpDistance += this.speed * dt;

6:带上拖尾:

MotionStreak组件: 配置好图片;(引擎bug，父节点移动，带有拖尾的子节点显示效果就会有问题，待解决)

7: ancher_offset: 100

8: 生成地图: 200, 400的距离随机

9: 地图滚动参数: y, 随着玩家滚动, x 取最左值和最右值(180, 580);

10：开始位置(180， 350)

三、实现的步骤

1 调整好player，具有旋转和压缩两个动画

2 实现跳跃，前置条件是有东西可跳，所以要先制作两个块

3 制作块，设置块的原点，中心点，前后左右点(主要是做跳跃检测，使用小色块)，currBlock nextBlock

4 开始写game_scene.js脚本

绑定player和block

固定第一个block(坐标转换)

添加第二个block (add_block方法)

5 调整第一个块和player的位置

6 实现player的跳跃方法player_jump，以及block的检测方法is_jump_on_block

7 实现地图滚动方法move_map

8 完善游戏代码

四、代码

game_scene.js

//game_scene.js

cc.Class({

extends: cc.Component,

properties: {

// foo: {

// // ATTRIBUTES:

// default: null, // The default value will be used only when the component attaching

// // to a node for the first time

// type: cc.SpriteFrame, // optional, default is typeof default

// serializable: true, // optional, default is true

// },

// bar: {

// get () {

// return this._bar;

// },

// set (value) {

// this._bar = value;

// }

// },

player: {

type: cc.Node,

default: null

},

block_prefabs: {

type: cc.Prefab,

default: []

},

block_root: {

default: null,

type: cc.Node

},

left_org: cc.v2(0, 0),

map_root: {

default: null,

type: cc.Node

},

y_radio: 0.5560472,

checkout: {

type: cc.Node,

default: null

}

},

// LIFE-CYCLE CALLBACKS:

// onLoad () {},

start() {

this.block_list = [];

this.cur_block = cc.instantiate(this.block_prefabs[Math.floor(Math.random() * this.block_prefabs.length)]);

this.block_root.addChild(this.cur_block);

// 将第一个块的位置设置为初始位置

this.cur_block.setPosition(this.block_root.convertToNodeSpaceAR(this.left_org));

var w_pos = this.cur_block.getChildByName('mid').convertToWorldSpaceAR(cc.v2(0, 0));

this.player.setPosition(this.map_root.convertToNodeSpaceAR(w_pos));

this.next_block = this.cur_block;

this.player_comp = this.player.getComponent("player");

this.block_zOrder = -1;

this.add_block();

},

add_block: function() {

this.cur_block = this.next_block;

this.next_block = cc.instantiate(this.block_prefabs[Math.floor(Math.random() * this.block_prefabs.length)]);

this.block_root.addChild(this.next_block);

this.next_block.zIndex = this.block_zOrder;

this.block_zOrder--;

var x_distance = 200 + Math.random() * 200;

var y_distance = x_distance * this.y_radio;

var next_pos = this.cur_block.getPosition();

next_pos.x += x_distance * this.player_comp.direction;

next_pos.y += y_distance;

this.next_block.setPosition(next_pos);

this.player_comp.set_next_block(this.next_block.getComponent("block"));

// 删除block

this.block_list.push(this.next_block);

if (this.block_list.length >= 5) {

for (var i = 0; i < 2; i++) {

var block = this.block_list.shift();

block.destroy();

}

}

},

// 地图滚动

move_map(offset_x, offset_y) {

var m1 = cc.moveBy(0.5, offset_x, offset_y);

var end_func = cc.callFunc(function() {

this.add_block();

}.bind(this));

var seq = cc.sequence([m1, end_func]);

this.map_root.runAction(seq);

},

on_checkout_game: function() {

this.checkout.active = true;

},

on_game_again: function() {

cc.director.loadScene("game_scene");

},

// update (dt) {},

});

player.js

// player.js

var game_scene = require("game_scene");

cc.Class({

extends: cc.Component,

properties: {

// foo: {

// // ATTRIBUTES:

// default: null, // The default value will be used only when the component attaching

// // to a node for the first time

// type: cc.SpriteFrame, // optional, default is typeof default

// serializable: true, // optional, default is true

// },

// bar: {

// get () {

// return this._bar;

// },

// set (value) {

// this._bar = value;

// }

// },

init_speed: 150,

a_power: 600,

y_radio: 0.5560472,

game_manager: {

type: game_scene,

default: null

},

},

// LIFE-CYCLE CALLBACKS:

onLoad() {

this.next_block = null;

this.direction = 1;

},

start() {

this.rot_node = this.node.getChildByName("rotate");

this.anima_node = this.rot_node.getChildByName("anima");

this.is_power_mode = false;

this.speed = 0;

this.x_distance = 0;

this.anima_node.on(cc.Node.EventType.TOUCH_START, function(e) {

this.is_power_mode = true;

this.x_distance = 0;

this.speed = this.init_speed;

this.anima_node.stopAllActions();

this.anima_node.runAction(cc.scaleTo(2, 1, 0.5));

}.bind(this), this);

this.anima_node.on(cc.Node.EventType.TOUCH_END, function(e) {

this.is_power_mode = false;

this.anima_node.stopAllActions();

this.anima_node.runAction(cc.scaleTo(0.5, 1, 1));

this.player_jump();

}.bind(this), this);

this.anima_node.on(cc.Node.EventType.TOUCH_CANCEL, function(e) {

this.is_power_mode = false;

this.anima_node.stopAllActions();

this.anima_node.runAction(cc.scaleTo(0.5, 1, 1));

this.player_jump();

}.bind(this), this);

},

update(dt) {

if (this.is_power_mode) {

this.speed += (this.a_power * dt);

this.x_distance += this.speed * dt;

}

},

player_jump: function() {

var x_distance = this.x_distance * this.direction;

var y_distance = this.x_distance * this.y_radio;

var target_pos = this.node.getPosition();

target_pos.x += x_distance;

target_pos.y += y_distance;

// 跳跃时候旋转

this.rot_node.runAction(cc.rotateBy(0.5, -360 * this.direction));

var w_pos = this.node.parent.convertToWorldSpaceAR(target_pos);

var is_game_over = false;

if (this.next_block.is_jump_on_block(w_pos, this.direction)) {

target_pos = this.node.parent.convertToNodeSpaceAR(w_pos);

} else {

is_game_over = true;

}

var j = cc.jumpTo(0.5, target_pos, 200, 1);

this.direction = (Math.random() < 0.5) ? -1 : 1;

var end_func = cc.callFunc(function() {

if (is_game_over) {

this.game_manager.on_checkout_game();

} else {

if (this.direction === -1) {

this.game_manager.move_map(580 - w_pos.x, -y_distance);

} else {

this.game_manager.move_map(180 - w_pos.x, -y_distance);

}

}

}.bind(this));

var seq = cc.sequence(j, end_func);

this.node.runAction(seq);

},

set_next_block(block) {

this.next_block = block;

},

});

block.js

// block.js

cc.Class({

extends: cc.Component,

properties: {

// foo: {

// // ATTRIBUTES:

// default: null, // The default value will be used only when the component attaching

// // to a node for the first time

// type: cc.SpriteFrame, // optional, default is typeof default

// serializable: true, // optional, default is true

// },

// bar: {

// get () {

// return this._bar;

// },

// set (value) {

// this._bar = value;

// }

// },

},

start() {

this.mid = this.node.getChildByName("mid");

this.up = this.node.getChildByName("up");

this.down = this.node.getChildByName("down");

this.left = this.node.getChildByName("left");

this.right = this.node.getChildByName("right");

},

// dir 1右跳 -1左跳

is_jump_on_block(w_dst_pos, direction) {

var mid_pos = this.mid.convertToWorldSpaceAR(cc.v2(0, 0));

var dir = w_dst_pos.sub(mid_pos);

var min_len = dir.mag();

var min_pos = mid_pos;

if (direction === 1) {

var up_pos = this.up.convertToWorldSpaceAR(cc.v2(0, 0));

dir = w_dst_pos.sub(up_pos);

var len = dir.mag();

if (min_len > len) {

min_len = len;

min_pos = up_pos;

}

var down_pos = this.down.convertToWorldSpaceAR(cc.v2(0, 0));

dir = w_dst_pos.sub(down_pos);

var len = dir.mag();

if (min_len > len) {

min_len = len;

min_pos = down_pos;

}

} else {

var left_pos = this.left.convertToWorldSpaceAR(cc.v2(0, 0));

dir = w_dst_pos.sub(left_pos);

var len = dir.mag();

if (min_len > len) {

min_len = len;

min_pos = left_pos;

}

var right_pos = this.right.convertToWorldSpaceAR(cc.v2(0, 0));

dir = w_dst_pos.sub(right_pos);

var len = dir.mag();

if (min_len > len) {

min_len = len;

min_pos = right_pos;

}

}

// 找到跳跃位置距离参考点最近的那个点以及位置

dir = w_dst_pos.sub(min_pos);

if (dir.mag() < 100) {

w_dst_pos.x = min_pos.x;

w_dst_pos.y = min_pos.y;

return true;

}

return false;

},

});

作者：orxx

来源：博客园

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