torch_power = 100;
torch_step = 100;
torch_angle = 60;
torch_angle_step = 20;
walk_speed = 3;
radius = 8;
_root.attachMovie("ground", "ground", _root.getNextHighestDepth());
_root.attachMovie("environment", "environment", _root.getNextHighestDepth());
_root.attachMovie("player", "player", _root.getNextHighestDepth(), {_x:250, _y:200});
_root.createEmptyMovieClip("light", _root.getNextHighestDepth());
player.onEnterFrame = function() {
if (Key.isDown(Key.LEFT)) {
this._x -= walk_speed;
}
if (Key.isDown(Key.RIGHT)) {
this._x += walk_speed;
}
if (Key.isDown(Key.UP)) {
this._y -= walk_speed;
}
if (Key.isDown(Key.DOWN)) {
this._y += walk_speed;
}
while (_root.environment.hitTest(this._x, this._y+radius, true)) {
this._y--;
}
while (_root.environment.hitTest(this._x, this._y-radius, true)) {
this._y++;
}
while (_root.environment.hitTest(this._x-radius, this._y, true)) {
this._x++;
}
while (_root.environment.hitTest(this._x+radius, this._y, true)) {
this._x--;
}
dist_x = this._x-_root._xmouse;
dist_y = this._y-_root._ymouse;
angle = -Math.atan2(dist_x, dist_y);
this._rotation = angle/(Math.PI/180);
light.clear();
light.lineStyle(1, 0xffffff);
light.moveTo(this._x, this._y);
for (x=0; x<=torch_angle; x += (torch_angle/torch_angle_step)) {
ray_angle = angle/(Math.PI/180)-90-(torch_angle/2)+x;
ray_angle = ray_angle*(Math.PI/180);
for (y=1; y<=torch_step; y++) {
if (environment.hitTest(this._x+(torch_power/torch_step*y)*Math.cos(ray_angle), this._y+(torch_power/torch_step*y)*Math.sin(ray_angle), true)) {
break;
}
}
light.lineTo(this._x+(torch_power/torch_step*y)*Math.cos(ray_angle), this._y+(torch_power/torch_step*y)*Math.sin(ray_angle));
}
light.lineTo(this._x, this._y);
};
效果如下。
我们再继续修改代码。
torch_power = 100;
torch_step = 100;
torch_angle = 60;
torch_angle_step = 20;
walk_speed = 3;
radius = 8;
_root.attachMovie("ground", "ground", _root.getNextHighestDepth());
_root.attachMovie("environment", "environment", _root.getNextHighestDepth());
_root.attachMovie("player", "player", _root.getNextHighestDepth(), {_x:250, _y:200});
_root.createEmptyMovieClip("light", _root.getNextHighestDepth());
player.onEnterFrame = function() {
if (Key.isDown(Key.LEFT)) {
this._x -= walk_speed;
}
if (Key.isDown(Key.RIGHT)) {
this._x += walk_speed;
}
if (Key.isDown(Key.UP)) {
this._y -= walk_speed;
}
if (Key.isDown(Key.DOWN)) {
this._y += walk_speed;
}
while (_root.environment.hitTest(this._x, this._y+radius, true)) {
this._y--;
}
while (_root.environment.hitTest(this._x, this._y-radius, true)) {
this._y++;
}
while (_root.environment.hitTest(this._x-radius, this._y, true)) {
this._x++;
}
while (_root.environment.hitTest(this._x+radius, this._y, true)) {
this._x--;
}
dist_x = this._x-_root._xmouse;
dist_y = this._y-_root._ymouse;
angle = -Math.atan2(dist_x, dist_y);
this._rotation = angle/(Math.PI/180);
light.clear();
light.beginFill(0xffffff, 100);
light.lineStyle(1, 0xffffff);
light.moveTo(this._x, this._y);
for (x=0; x<=torch_angle; x += (torch_angle/torch_angle_step)) {
ray_angle = angle/(Math.PI/180)-90-(torch_angle/2)+x;
ray_angle = ray_angle*(Math.PI/180);
for (y=1; y<=torch_step; y++) {
if (environment.hitTest(this._x+(torch_power/torch_step*y)*Math.cos(ray_angle), this._y+(torch_power/torch_step*y)*Math.sin(ray_angle), true)) {
break;
}
}
light.lineTo(this._x+(torch_power/torch_step*y)*Math.cos(ray_angle), this._y+(torch_power/torch_step*y)*Math.sin(ray_angle));
}
light.lineTo(this._x, this._y);
light.endFill();
ground.setMask(light);
};
效果如下。
好了！今天先讲到这里。最后给大家提供上面所有演示的源文件。点击这里下载Fla源文件
