Particle　Anatomy粒子效果解析second　life--梦飞翔的地方

Particle Anatomy粒子效果解析second life

作者:梦翔儿日期:2007-6-19 23:19:00

Particle Anatomy - The llParticleSystem Function

粒子效果解析，llParticlesystem函数
-----------------------------------------------------

Each particle setting has a default value. If you send llParticleSystem() an EMPTY LIST, it will use
all the defaults. Incidentally, using ALL the default settings will turn a particle emitter off, like this:

default {
    state_entry() {
         llParticleSystem( [ ] );
    }
}

To override one setting you must specify the name of the setting and the new value for it: Like COLOR and RED.

如果忽略设置，你必须指定设置的名字和新的值，比如色彩或RED

....
llParticleSystem( [ PSYS_PART_START_COLOR, < 1.0, 0.0, 0.0 > ] );
...

If you want to override two settings it could look like this

如果两个参数设置，象这样：

...
llParticleSystem( [ PSYS_PART_START_COLOR, < 1.0, 0.0, 0.0 > ,
PSYS_PART_START_SCALE, < 2.5, 2.5, 0 > ] );
...

Each time you add something to the LIST, you do so as pairs of NAME and VALUE.

每次加列表，你必须成对出象，名字与值。

As you go through the lab you'll learn each of the setting NAMES as well as their default and legal VALUES.

在这个实验室中，你将会学到如何设置合理的名字与合法的值

Some names start with PSYS_SRC_ (mostly for emitter settings 放射性) others start with PSYS_PART_ (mostly for particle settings 粒子性).

Advanced Note:
In reality, each PSYS_ name is really just an integer number. 必须是整型。 If you were to include a line like: llOwnerSay( (string) PSYS_SRC_PATTERN ); You would get the integer number for that parameter. You don't NEED to use the PSYS_ constants if you don't want to.

如果不是必须，最好不要用PSYS_constants 。

For example, the below script is completely legal... but will be very difficult to debug or adjust later:]

下面例子尽管符合规则，但是很难通过debug，或有延迟

default {
    state_entry() {
          llParticleSystem( [ 7,5.500, 0,371, 1,<1.113,0.21,1.107>, 3,<0.52,0.61,0.49>, 5,<0.0,0.0,0.0>, 6,<5.500,5.500,0.0>, 9,8, 13,0.1, 8,<0.0,0.0,0.0>, 15,1, 16,0.0, 17,2.228, 18,2.228, 22,1.157, 23,1.157, 21,<0.0,0.0,0.0>, 19,0.0, 12,"", 2,0.80, 4,0.0 ] );
    }
}

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