Fix spelling errors
This commit is contained in:
skyace65
parent
48555fcda4
commit
1692fc4b6d
Binary file not shown.
|
Before Width: | Height: | Size: 202 B After Width: | Height: | Size: 176 B |
Binary file not shown.
|
Before Width: | Height: | Size: 10 KiB After Width: | Height: | Size: 12 KiB |
Binary file not shown.
|
After Width: | Height: | Size: 9.2 KiB |
|
|
@ -22,9 +22,21 @@ Particles2D
|
|||
|
||||
Particle systems are added to the scene via the
|
||||
:ref:`Particles2D <class_Particles2D>`
|
||||
node. They are enabled by default and start emitting white points
|
||||
downwards (as affected by the gravity). This provides a reasonable
|
||||
starting point to start adapting it to our needs.
|
||||
node. However, after creating that node you will notice that only a white dot was created,
|
||||
and that there is a warning icon next to your Particles2D node in the inspector. This
|
||||
is because the node needs a ParticlesMaterial to function.
|
||||
|
||||
ParticlesMaterial
|
||||
~~~~~~~~~~~~~~~~~
|
||||
|
||||
To add a process material to your particles node, go to Process Material in
|
||||
your inspector panel. Click on the box next to material, and from the dropdown
|
||||
menu select New Particles Material.
|
||||
|
||||
.. image:: img/particles_material.png
|
||||
|
||||
Your Particles2D node should now be emitting
|
||||
white points downward.
|
||||
|
||||
.. image:: img/particles1.png
|
||||
|
||||
|
|
@ -37,129 +49,8 @@ the relevant texture property:
|
|||
|
||||
.. image:: img/particles2.png
|
||||
|
||||
Physics variables
|
||||
-----------------
|
||||
|
||||
Before taking a look at the global parameters for the particle system,
|
||||
let's first see what happens when the physics variables are tweaked.
|
||||
|
||||
Direction
|
||||
---------
|
||||
|
||||
This is the base angle at which particles emit. Default is 0 (down):
|
||||
|
||||
.. image:: img/paranim1.gif
|
||||
|
||||
Changing it will change the emissor direction, but gravity will still
|
||||
affect them:
|
||||
|
||||
.. image:: img/paranim2.gif
|
||||
|
||||
This parameter is useful because, by rotating the node, gravity will
|
||||
also be rotated. Changing direction keeps them separate.
|
||||
|
||||
Spread
|
||||
------
|
||||
|
||||
Spread is the angle at which particles will randomly be emitted.
|
||||
Increasing the spread will increase the angle. A spread of 180 will emit
|
||||
in all directions.
|
||||
|
||||
.. image:: img/paranim3.gif
|
||||
|
||||
Linear velocity
|
||||
---------------
|
||||
|
||||
Linear velocity is the speed at which particles will be emitted (in
|
||||
pixels/sec). Speed might later be modified by gravity or other
|
||||
accelerations (as described further below).
|
||||
|
||||
.. image:: img/paranim4.gif
|
||||
|
||||
Spin velocity
|
||||
-------------
|
||||
|
||||
Spin velocity is the speed at which particles turn around their center
|
||||
(in degrees/sec).
|
||||
|
||||
.. image:: img/paranim5.gif
|
||||
|
||||
Orbit velocity
|
||||
--------------
|
||||
|
||||
Orbit velocity is used to make particles turn around their center.
|
||||
|
||||
.. image:: img/paranim6.gif
|
||||
|
||||
Gravity direction & strength
|
||||
----------------------------
|
||||
|
||||
Gravity can be modified as in direction and strength. Gravity affects
|
||||
every particle currently alive.
|
||||
|
||||
.. image:: img/paranim7.gif
|
||||
|
||||
Radial acceleration
|
||||
-------------------
|
||||
|
||||
If this acceleration is positive, particles are accelerated away from
|
||||
the center. If negative, they are absorbed towards it.
|
||||
|
||||
.. image:: img/paranim8.gif
|
||||
|
||||
Tangential acceleration
|
||||
-----------------------
|
||||
|
||||
This acceleration will use the tangent vector to the center. Combining
|
||||
with radial acceleration can do nice effects.
|
||||
|
||||
.. image:: img/paranim9.gif
|
||||
|
||||
Damping
|
||||
-------
|
||||
|
||||
Damping applies friction to the particles, forcing them to stop. It is
|
||||
especially useful for sparks or explosions, which usually begin with a
|
||||
high linear velocity and then stop as they fade.
|
||||
|
||||
.. image:: img/paranim10.gif
|
||||
|
||||
Initial angle
|
||||
-------------
|
||||
|
||||
Determines the initial angle of the particle (in degress). This parameter
|
||||
is mostly useful randomized.
|
||||
|
||||
.. image:: img/paranim11.gif
|
||||
|
||||
Initial & final size
|
||||
--------------------
|
||||
|
||||
Determines the initial and final scales of the particle.
|
||||
|
||||
.. image:: img/paranim12.gif
|
||||
|
||||
Color phases
|
||||
------------
|
||||
|
||||
Particles can use up to 4 color phases. Each color phase can include
|
||||
transparency.
|
||||
|
||||
Phases must provide an offset value from 0 to 1, and always in
|
||||
ascending order. For example, a color will begin at offset 0 and end
|
||||
in offset 1, but 4 colors might use different offsets, such as 0, 0.2,
|
||||
0.8 and 1.0 for the different phases:
|
||||
|
||||
.. image:: img/particlecolorphases.png
|
||||
|
||||
Will result in:
|
||||
|
||||
.. image:: img/paranim13.gif
|
||||
|
||||
Global parameters
|
||||
-----------------
|
||||
|
||||
These parameters affect the behavior of the entire system.
|
||||
Time Parameters
|
||||
===============
|
||||
|
||||
Lifetime
|
||||
--------
|
||||
|
|
@ -175,15 +66,11 @@ Lifetime: 4.0
|
|||
|
||||
.. image:: img/paranim15.gif
|
||||
|
||||
Timescale
|
||||
---------
|
||||
One Shot
|
||||
--------
|
||||
|
||||
It happens often that the effect achieved is perfect, except too fast or
|
||||
too slow. Timescale helps adjust the overall speed.
|
||||
|
||||
Timescale everything 2x:
|
||||
|
||||
.. image:: img/paranim16.gif
|
||||
When enabled, a Particles2D node will emit all of it's particles once
|
||||
and then never again.
|
||||
|
||||
Preprocess
|
||||
----------
|
||||
|
|
@ -194,45 +81,12 @@ a torch, mist, etc begin emitting the moment you enter. Preprocess is
|
|||
used to let the system process a given amount of seconds before it is
|
||||
actually shown the first time.
|
||||
|
||||
Emit timeout
|
||||
------------
|
||||
|
||||
This variable will switch emission off after given amount of seconds
|
||||
being on. When zero, it is disabled.
|
||||
|
||||
Offset
|
||||
------
|
||||
|
||||
Allows to move the emission center away from the center
|
||||
|
||||
Half extents
|
||||
------------
|
||||
|
||||
Makes the center (by default 1 pixel) wider, to the size in pixels
|
||||
desired. Particles will emit randomly inside this area.
|
||||
|
||||
.. image:: img/paranim17.gif
|
||||
|
||||
It is also possible to set an emission mask by using this value. Check
|
||||
the "Particles" menu on the 2D scene editor viewport and select your
|
||||
favorite texture. Opaque pixels will be used as potential emission
|
||||
location, while transparent ones will be ignored:
|
||||
|
||||
.. image:: img/paranim19.gif
|
||||
|
||||
Local space
|
||||
Speed Scale
|
||||
-----------
|
||||
|
||||
By default this option is on, and it means that the space that particles
|
||||
are emitted to is contained within the node. If the node is moved, all
|
||||
particles are moved with it:
|
||||
|
||||
.. image:: img/paranim20.gif
|
||||
|
||||
If disabled, particles will emit to global space, meaning that if the
|
||||
node is moved, the emissor is moved too:
|
||||
|
||||
.. image:: img/paranim21.gif
|
||||
The speed scale has a default value of 1, and is used to adjust the
|
||||
speed of a particle system. Lowering the value will make the particles
|
||||
slower, increaseing the value will make the particles much faster.
|
||||
|
||||
Explosiveness
|
||||
-------------
|
||||
|
|
@ -258,3 +112,164 @@ All physics parameters can be randomized. Random variables go from 0 to
|
|||
::
|
||||
|
||||
initial_value = param_value + param_value*randomness
|
||||
|
||||
Fixed FPS
|
||||
---------
|
||||
|
||||
This setting can be used to set the particle system to render at a fixed
|
||||
FPS. For instance, changing the FPS to 2 will make the particles render
|
||||
every 2 frames a second, however it will not slow down.
|
||||
|
||||
Fract Delta
|
||||
-----------
|
||||
|
||||
This can be used to turn Fract Delta on or off.
|
||||
|
||||
Drawing Parameters
|
||||
==================
|
||||
|
||||
Visability Rect
|
||||
---------------
|
||||
|
||||
The W and H values control width and height of the visability rectnagle
|
||||
respectively. The X and Y values control the position of the Upper left
|
||||
corner of the visability rectangle relative to the particle emitter.
|
||||
|
||||
Local Coords
|
||||
------------
|
||||
|
||||
By default this option is on, and it means that the space that particles
|
||||
are emitted to is contained within the node. If the node is moved, all
|
||||
particles are moved with it:
|
||||
|
||||
.. image:: img/paranim20.gif
|
||||
|
||||
If disabled, particles will emit to global space, meaning that if the
|
||||
node is moved, the emissor is moved too:
|
||||
|
||||
.. image:: img/paranim21.gif
|
||||
|
||||
Draw Order
|
||||
----------
|
||||
|
||||
The particle draw order can be set to index or lifetime.
|
||||
|
||||
ParticlesMaterial settings
|
||||
==========================
|
||||
|
||||
Direction
|
||||
---------
|
||||
|
||||
This is the base angle at which particles emit. Default is 0 (down):
|
||||
|
||||
.. image:: img/paranim1.gif
|
||||
|
||||
Changing it will change the emissor direction, but gravity will still
|
||||
affect them:
|
||||
|
||||
.. image:: img/paranim2.gif
|
||||
|
||||
This parameter is useful because, by rotating the node, gravity will
|
||||
also be rotated. Changing direction keeps them separate.
|
||||
|
||||
Spread
|
||||
------
|
||||
|
||||
Spread is the angle at which particles will randomly be emitted.
|
||||
Increasing the spread will increase the angle. A spread of 180 will emit
|
||||
in all directions.
|
||||
|
||||
.. image:: img/paranim3.gif
|
||||
|
||||
Gravity
|
||||
-------
|
||||
|
||||
The gravity applied to every particle.
|
||||
|
||||
.. image:: img/paranim7.gif
|
||||
|
||||
Initial Velocity
|
||||
----------------
|
||||
|
||||
Linear velocity is the speed at which particles will be emitted (in
|
||||
pixels/sec). Speed might later be modified by gravity or other
|
||||
accelerations (as described further below).
|
||||
|
||||
.. image:: img/paranim4.gif
|
||||
|
||||
Angular Velocity
|
||||
----------------
|
||||
|
||||
Angular velocity is the inital angular velocity applied to particles.
|
||||
|
||||
Spin Velocity
|
||||
-------------
|
||||
|
||||
Spin velocity is the speed at which particles turn around their center
|
||||
(in degrees/sec).
|
||||
|
||||
.. image:: img/paranim5.gif
|
||||
|
||||
Orbit Velocity
|
||||
--------------
|
||||
|
||||
Orbit velocity is used to make particles turn around their center.
|
||||
|
||||
.. image:: img/paranim6.gif
|
||||
|
||||
Linear Acceleration
|
||||
-------------------
|
||||
|
||||
The linear acceleration applied to each particle.
|
||||
|
||||
Radial Acceleration
|
||||
-------------------
|
||||
|
||||
If this acceleration is positive, particles are accelerated away from
|
||||
the center. If negative, they are absorbed towards it.
|
||||
|
||||
.. image:: img/paranim8.gif
|
||||
|
||||
Tangential Acceleration
|
||||
-----------------------
|
||||
|
||||
This acceleration will use the tangent vector to the center. Combining
|
||||
with radial acceleration can do nice effects.
|
||||
|
||||
.. image:: img/paranim9.gif
|
||||
|
||||
Damping
|
||||
-------
|
||||
|
||||
Damping applies friction to the particles, forcing them to stop. It is
|
||||
especially useful for sparks or explosions, which usually begin with a
|
||||
high linear velocity and then stop as they fade.
|
||||
|
||||
.. image:: img/paranim10.gif
|
||||
|
||||
Angle
|
||||
-----
|
||||
|
||||
Determines the initial angle of the particle (in degress). This parameter
|
||||
is mostly useful randomized.
|
||||
|
||||
.. image:: img/paranim11.gif
|
||||
|
||||
Scale
|
||||
-----
|
||||
|
||||
Determines the initial scale of the particles.
|
||||
|
||||
.. image:: img/paranim12.gif
|
||||
|
||||
Color
|
||||
-----
|
||||
|
||||
Used to change the color of the particles being emitted.
|
||||
|
||||
Hue variation
|
||||
-------------
|
||||
|
||||
The variation value sets the inital hue variation applied to each
|
||||
particle. The Variation rand value controls the hue variation
|
||||
randomness ratio.
|
||||
Loading…
Reference in New Issue