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Implemented tools around particles seed randomization.

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The purpose of this code is to expose the necessary
functions for users and engine devs to develop tooling
for properly timing and seeking inside particles.

Co-authored-by: Hugo Locurcio <hugo.locurcio@hugo.pro>
Co-authored-by: A Thousand Ships <96648715+AThousandShips@users.noreply.github.com>
Co-authored-by: Tomasz Chabora <kobewi4e@gmail.com>
Co-authored-by: Rémi Verschelde <rverschelde@gmail.com>
This commit is contained in:
QbieShay
2024-05-18 18:13:57 +02:00
committed by Qbieshay
parent bdf625bd54
commit e9eb0b6082
27 changed files with 653 additions and 108 deletions
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16
doc/classes/CPUParticles2D.xml
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@ -46,10 +46,20 @@
Returns the enabled state of the given particle flag (see [enum ParticleFlags] for options).
</description>
</method>
<method name="request_particles_process">
<return type="void" />
<param index="0" name="process_time" type="float" />
<description>
Requests the particles to process for extra process time during a single frame.
Useful for particle playback, if used in combination with [member use_fixed_seed] or by calling [method restart] with parameter [code]keep_seed[/code] set to [code]true[/code].
</description>
</method>
<method name="restart">
<return type="void" />
<param index="0" name="keep_seed" type="bool" default="false" />
<description>
Restarts the particle emitter.
If [param keep_seed] is [code]true[/code], the current random seed will be preserved. Useful for seeking and playback.
</description>
</method>
<method name="set_param_curve">
@ -263,6 +273,9 @@
Each particle's vertical scale will vary along this [Curve]. Should be a unit [Curve].
[member split_scale] must be enabled.
</member>
<member name="seed" type="int" setter="set_seed" getter="get_seed" default="0">
Sets the random seed used by the particle system. Only effective if [member use_fixed_seed] is [code]true[/code].
</member>
<member name="speed_scale" type="float" setter="set_speed_scale" getter="get_speed_scale" default="1.0">
Particle system's running speed scaling ratio. A value of [code]0[/code] can be used to pause the particles.
</member>
@ -284,6 +297,9 @@
<member name="texture" type="Texture2D" setter="set_texture" getter="get_texture">
Particle texture. If [code]null[/code], particles will be squares.
</member>
<member name="use_fixed_seed" type="bool" setter="set_use_fixed_seed" getter="get_use_fixed_seed" default="false">
If [code]true[/code], particles will use the same seed for every simulation using the seed defined in [member seed]. This is useful for situations where the visual outcome should be consistent across replays, for example when using Movie Maker mode.
</member>
</members>
<signals>
<signal name="finished">