由浅入深学习Flash制作高射炮游戏_Flash教程

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通过这个蝴蝶在花丛中翻飞的实例我们可以学习Flash图层、引导线运动、帧与补间动画等技术。主要使用工具：箭头工具(选择工具)、任意变形工具、铅笔工具。请大

　　主要是利用Flash Actionscript一步一步学习Flash高射炮简单游戏的制作过程，最终效果只是一个简单的演示，假如你有爱好可以继续深入学习！

　　开篇前，先把所有的演示动画的源程序提供给大家：

　　点击这里下载本教程中所有演示动画的源文件(解压密码：www.mb5u.com)

　　第一步：首先简单的制作一个鼠标动画，绘制一个鼠标的图，自己定。然后选择第一帧输入下面代码：

Mouse.hide();
attachMovie("crosshair", "crosshair", 1);
crosshair.onEnterFrame = function() {
this._x = _xmouse;
this._y = _ymouse;
};

　　效果如下：

　　第二步：绘制一个坦克，分成两部分，如下面：

　　把下面的命名实例名为tank

　　代码如下：

Mouse.hide();
attachMovie("crosshair", "crosshair", 1);
attachMovie("tank", "tank", 2, {_x:230, _y:350});
crosshair.onEnterFrame = function() {
this._x = _xmouse;
this._y = _ymouse;
};
tank.onEnterFrame = function() {
mousex = _xmouse-this._x;
mousey = (_ymouse-this._y)*-1;
angle = Math.atan(mousey/mousex)/(Math.PI/180);
if (mousex<0) {
angle = 180;
}
if (mousex>=0 && mousey<0) {
angle = 360;
}
this.cannon._rotation = angle*-1;
};

　　效果（无角度限制）：

　　第三步：我这里设置转动的一定的角度。

Mouse.hide();
attachMovie("crosshair", "crosshair", 1);
attachMovie("tank", "tank", 2, {_x:230, _y:350});
crosshair.onEnterFrame = function() {
this._x = _xmouse;
this._y = _ymouse;
};
tank.onEnterFrame = function() {
mousex = _xmouse-this._x;
mousey = (_ymouse-this._y)*-1;
angle = Math.atan(mousey/mousex)/(Math.PI/180);
if (mousex<0) {
angle = 180;
}
if (mousex>=0 && mousey<0) {
angle = 360;
}
if (angle>160) {
angle = 160;
}
if (angle<20) {
angle = 20;
}
this.cannon._rotation = angle*-1;
};

　　效果如下：

　　然后是计算开火的目标：

Mouse.hide();
attachMovie("crosshair", "crosshair", 1);
attachMovie("tank", "tank", 2, {_x:230, _y:350});
crosshair.onEnterFrame = function() {
this._x = _xmouse;
this._y = _ymouse;
};
tank.onEnterFrame = function() {
mousex = _xmouse-this._x;
mousey = (_ymouse-this._y)*-1;
angle = Math.atan(mousey/mousex)/(Math.PI/180);
if (mousex<0) {
angle = 180;
}
if (mousex>=0 && mousey<0) {
angle = 360;
}
if (angle>160) {
angle = 160;
}
if (angle<20) {
angle = 20;
}
firepower = Math.sqrt(mousex*mousex mousey*mousey);
if (firepower>200) {
firepower = 200;
}
this.cannon._rotation = angle*-1;
};

　　开火的制作：

Mouse.hide();
attachMovie("crosshair", "crosshair", 1);
attachMovie("tank", "tank", 2, {_x:230, _y:350});
crosshair.onEnterFrame = function() {
this._x = _xmouse;
this._y = _ymouse;
};
tank.onEnterFrame = function() {
mousex = _xmouse-this._x;
mousey = (_ymouse-this._y)*-1;
angle = Math.atan(mousey/mousex)/(Math.PI/180);
if (mousex<0) {
angle = 180;
}
if (mousex>=0 && mousey<0) {
angle = 360;
}
if (angle>160) {
angle = 160;
}
if (angle<20) {
angle = 20;
}
firepower = Math.sqrt(mousex*mousex mousey*mousey);
if (firepower>200) {
firepower = 200;
}
this.cannon._rotation = angle*-1;
};
function onMouseDown() {
angle = tank.cannon._rotation-1
start_ball_x = tank._x 48*Math.cos(angle*Math.PI/180);
start_ball_y = tank._y 48*Math.sin(angle*Math.PI/180);
attachMovie("cannonball", "cannonball", 3, {_x:start_ball_x, _y:start_ball_y});
}

　　效果如下：

　　开火出来炮弹：

Mouse.hide();
attachMovie("crosshair", "crosshair", 1);
attachMovie("tank", "tank", 2, {_x:230, _y:350});
crosshair.onEnterFrame = function() {
this._x = _xmouse;
this._y = _ymouse;
};
tank.onEnterFrame = function() {
mousex = _xmouse-this._x;
mousey = (_ymouse-this._y)*-1;
angle = Math.atan(mousey/mousex)/(Math.PI/180);
if (mousex<0) {
angle = 180;
}
if (mousex>=0 && mousey<0) {
angle = 360;
}
if (angle>160) {
angle = 160;
}
if (angle<20) {
angle = 20;
}
firepower = Math.sqrt(mousex*mousex mousey*mousey);
if (firepower>200) {
firepower = 200;
}
this.cannon._rotation = angle*-1;
};
function onMouseDown() {
angle = tank.cannon._rotation-1;
start_ball_x = tank._x 48*Math.cos(angle*Math.PI/180);
start_ball_y = tank._y 48*Math.sin(angle*Math.PI/180);
cannonball_fired = attachMovie("cannonball", "cannonball_" _root.getNextHighestDepth(), _root.getNextHighestDepth(), {_x:start_ball_x, _y:start_ball_y});
cannonball_fired.dirx = Math.cos(angle*Math.PI/180)*firepower;
cannonball_fired.diry = Math.sin(angle*Math.PI/180)*firepower;
cannonball_fired.onEnterFrame = function() {
this._x = this.dirx/50;
this._y = this.diry/50;
};
}

　　效果如下：

　　最后再加以具体的限制一下炮弹：

Mouse.hide();
gravity = 2;
attachMovie("crosshair", "crosshair", 1);
attachMovie("tank", "tank", 2, {_x:230, _y:350});
crosshair.onEnterFrame = function() {
this._x = _xmouse;
this._y = _ymouse;
};
tank.onEnterFrame = function() {
mousex = _xmouse-this._x;
mousey = (_ymouse-this._y)*-1;
angle = Math.atan(mousey/mousex)/(Math.PI/180);
if (mousex<0) {
angle = 180;
}
if (mousex>=0 && mousey<0) {
angle = 360;
}
if (angle>160) {
angle = 160;
}
if (angle<20) {
angle = 20;
}
firepower = Math.sqrt(mousex*mousex mousey*mousey);
if (firepower>200) {
firepower = 200;
}
this.cannon._rotation = angle*-1;
};
function onMouseDown() {
angle = tank.cannon._rotation-1;
start_ball_x = tank._x 48*Math.cos(angle*Math.PI/180);
start_ball_y = tank._y 48*Math.sin(angle*Math.PI/180);
cannonball_fired = attachMovie("cannonball", "cannonball_" _root.getNextHighestDepth(), _root.getNextHighestDepth(), {_x:start_ball_x, _y:start_ball_y});
cannonball_fired.dirx = Math.cos(angle*Math.PI/180)*firepower;
cannonball_fired.diry = Math.sin(angle*Math.PI/180)*firepower;
cannonball_fired.onEnterFrame = function() {
this.diry = gravity;
this._x = this.dirx/50;
this._y = this.diry/50;
};
}

　　效果如下：

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