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Adding back the gpu based particles pt1.
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@Relintai
Relintai committed Jul 16, 2024
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130 changes: 130 additions & 0 deletions doc/classes/Particles.xml
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<?xml version="1.0" encoding="UTF-8" ?>
<class name="Particles" inherits="GeometryInstance" version="3.6" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
<brief_description>
GPU-based 3D particle emitter.
</brief_description>
<description>
3D particle node used to create a variety of particle systems and effects. [Particles] features an emitter that generates some number of particles at a given rate.
Use the [code]process_material[/code] property to add a [ParticlesMaterial] to configure particle appearance and behavior. Alternatively, you can add a [ShaderMaterial] which will be applied to all particles.
[b]Note:[/b] [Particles] only work when using the GLES3 renderer. If using the GLES2 renderer, use [CPUParticles] instead. You can convert [Particles] to [CPUParticles] by selecting the node, clicking the [b]Particles[/b] menu at the top of the 3D editor viewport then choosing [b]Convert to CPUParticles[/b].
[b]Note:[/b] On macOS, [Particles] rendering is much slower than [CPUParticles] due to transform feedback being implemented on the CPU instead of the GPU. Consider using [CPUParticles] instead when targeting macOS.
[b]Note:[/b] After working on a Particles node, remember to update its [member visibility_aabb] by selecting it, clicking the [b]Particles[/b] menu at the top of the 3D editor viewport then choose [b]Generate Visibility AABB[/b]. Otherwise, particles may suddenly disappear depending on the camera position and angle.
</description>
<tutorials>
<link title="Controlling thousands of fish with Particles">$DOCS_URL/tutorials/performance/vertex_animation/controlling_thousands_of_fish.html</link>
<link title="Third Person Shooter Demo">https://godotengine.org/asset-library/asset/678</link>
</tutorials>
<methods>
<method name="capture_aabb" qualifiers="const">
<return type="AABB" />
<description>
Returns the axis-aligned bounding box that contains all the particles that are active in the current frame.
</description>
</method>
<method name="get_draw_pass_mesh" qualifiers="const">
<return type="Mesh" />
<argument index="0" name="pass" type="int" />
<description>
Returns the [Mesh] that is drawn at index [code]pass[/code].
</description>
</method>
<method name="restart">
<return type="void" />
<description>
Restarts the particle emission, clearing existing particles.
</description>
</method>
<method name="set_draw_pass_mesh">
<return type="void" />
<argument index="0" name="pass" type="int" />
<argument index="1" name="mesh" type="Mesh" />
<description>
Sets the [Mesh] that is drawn at index [code]pass[/code].
</description>
</method>
</methods>
<members>
<member name="amount" type="int" setter="set_amount" getter="get_amount" default="8">
The number of particles emitted in one emission cycle (corresponding to the [member lifetime]).
[b]Note:[/b] Changing [member amount] will reset the particle emission, therefore removing all particles that were already emitted before changing [member amount].
</member>
<member name="draw_order" type="int" setter="set_draw_order" getter="get_draw_order" enum="Particles.DrawOrder" default="0">
Particle draw order. Uses [enum DrawOrder] values.
</member>
<member name="draw_pass_1" type="Mesh" setter="set_draw_pass_mesh" getter="get_draw_pass_mesh">
[Mesh] that is drawn for the first draw pass.
</member>
<member name="draw_pass_2" type="Mesh" setter="set_draw_pass_mesh" getter="get_draw_pass_mesh">
[Mesh] that is drawn for the second draw pass.
</member>
<member name="draw_pass_3" type="Mesh" setter="set_draw_pass_mesh" getter="get_draw_pass_mesh">
[Mesh] that is drawn for the third draw pass.
</member>
<member name="draw_pass_4" type="Mesh" setter="set_draw_pass_mesh" getter="get_draw_pass_mesh">
[Mesh] that is drawn for the fourth draw pass.
</member>
<member name="draw_passes" type="int" setter="set_draw_passes" getter="get_draw_passes" default="1">
The number of draw passes when rendering particles.
</member>
<member name="emitting" type="bool" setter="set_emitting" getter="is_emitting" default="true">
If [code]true[/code], particles are being emitted.
</member>
<member name="explosiveness" type="float" setter="set_explosiveness_ratio" getter="get_explosiveness_ratio" default="0.0">
Time ratio between each emission. If [code]0[/code], particles are emitted continuously. If [code]1[/code], all particles are emitted simultaneously.
</member>
<member name="fixed_fps" type="int" setter="set_fixed_fps" getter="get_fixed_fps" default="0">
The particle system's frame rate is fixed to a value. For instance, changing the value to 2 will make the particles render at 2 frames per second. Note this does not slow down the simulation of the particle system itself.
</member>
<member name="fract_delta" type="bool" setter="set_fractional_delta" getter="get_fractional_delta" default="true">
If [code]true[/code], results in fractional delta calculation which has a smoother particles display effect.
</member>
<member name="lifetime" type="float" setter="set_lifetime" getter="get_lifetime" default="1.0">
The amount of time each particle will exist (in seconds).
</member>
<member name="local_coords" type="bool" setter="set_use_local_coordinates" getter="get_use_local_coordinates" default="true">
If [code]true[/code], particles use the parent node's coordinate space. If [code]false[/code], they use global coordinates.
</member>
<member name="one_shot" type="bool" setter="set_one_shot" getter="get_one_shot" default="false">
If [code]true[/code], only [code]amount[/code] particles will be emitted.
</member>
<member name="preprocess" type="float" setter="set_pre_process_time" getter="get_pre_process_time" default="0.0">
Amount of time to preprocess the particles before animation starts. Lets you start the animation some time after particles have started emitting.
</member>
<member name="process_material" type="Material" setter="set_process_material" getter="get_process_material">
[Material] for processing particles. Can be a [ParticlesMaterial] or a [ShaderMaterial].
</member>
<member name="randomness" type="float" setter="set_randomness_ratio" getter="get_randomness_ratio" default="0.0">
Emission randomness ratio.
</member>
<member name="speed_scale" type="float" setter="set_speed_scale" getter="get_speed_scale" default="1.0">
Speed scaling ratio. A value of [code]0[/code] can be used to pause the particles.
</member>
<member name="visibility_aabb" type="AABB" setter="set_visibility_aabb" getter="get_visibility_aabb" default="AABB( -4, -4, -4, 8, 8, 8 )">
The [AABB] that determines the node's region which needs to be visible on screen for the particle system to be active.
Grow the box if particles suddenly appear/disappear when the node enters/exits the screen. The [AABB] can be grown via code or with the [b]Particles → Generate AABB[/b] editor tool.
[b]Note:[/b] If the [ParticlesMaterial] in use is configured to cast shadows, you may want to enlarge this AABB to ensure the shadow is updated when particles are off-screen.
</member>
</members>
<signals>
<signal name="finished">
<description>
Emitted when all active particles have finished processing. When [member one_shot] is disabled, particles will process continuously, so this is never emitted.
[b]Note:[/b] Due to the particles being computed on the GPU there might be a delay before the signal gets emitted.
</description>
</signal>
</signals>
<constants>
<constant name="DRAW_ORDER_INDEX" value="0" enum="DrawOrder">
Particles are drawn in the order emitted.
</constant>
<constant name="DRAW_ORDER_LIFETIME" value="1" enum="DrawOrder">
Particles are drawn in order of remaining lifetime.
</constant>
<constant name="DRAW_ORDER_VIEW_DEPTH" value="2" enum="DrawOrder">
Particles are drawn in order of depth.
</constant>
<constant name="MAX_DRAW_PASSES" value="4">
Maximum number of draw passes supported.
</constant>
</constants>
</class>
103 changes: 103 additions & 0 deletions doc/classes/Particles2D.xml
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<?xml version="1.0" encoding="UTF-8" ?>
<class name="Particles2D" inherits="Node2D" version="3.6" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
<brief_description>
GPU-based 2D particle emitter.
</brief_description>
<description>
2D particle node used to create a variety of particle systems and effects. [Particles2D] features an emitter that generates some number of particles at a given rate.
Use the [code]process_material[/code] property to add a [ParticlesMaterial] to configure particle appearance and behavior. Alternatively, you can add a [ShaderMaterial] which will be applied to all particles.
[b]Note:[/b] [Particles2D] only work when using the GLES3 renderer. If using the GLES2 renderer, use [CPUParticles2D] instead. You can convert [Particles2D] to [CPUParticles2D] by selecting the node, clicking the [b]Particles[/b] menu at the top of the 2D editor viewport then choosing [b]Convert to CPUParticles2D[/b].
[b]Note:[/b] On macOS, [Particles2D] rendering is much slower than [CPUParticles2D] due to transform feedback being implemented on the CPU instead of the GPU. Consider using [CPUParticles2D] instead when targeting macOS.
[b]Note:[/b] After working on a Particles node, remember to update its [member visibility_rect] by selecting it, clicking the [b]Particles[/b] menu at the top of the 2D editor viewport then choose [b]Generate Visibility Rect[/b]. Otherwise, particles may suddenly disappear depending on the camera position and angle.
[b]Note:[/b] Unlike [CPUParticles2D], [Particles2D] currently ignore the texture region defined in [AtlasTexture]s.
</description>
<tutorials>
<link title="Particle systems (2D)">$DOCS_URL/tutorials/2d/particle_systems_2d.html</link>
<link title="2D Particles Demo">https://godotengine.org/asset-library/asset/118</link>
<link title="2D Dodge The Creeps Demo (uses GPUParticles2D for the trail behind the player)">https://godotengine.org/asset-library/asset/515</link>
</tutorials>
<methods>
<method name="capture_rect" qualifiers="const">
<return type="Rect2" />
<description>
Returns a rectangle containing the positions of all existing particles.
[b]Note:[/b] When using threaded rendering this method synchronizes the rendering thread. Calling it often may have a negative impact on performance.
</description>
</method>
<method name="restart">
<return type="void" />
<description>
Restarts all the existing particles.
</description>
</method>
</methods>
<members>
<member name="amount" type="int" setter="set_amount" getter="get_amount" default="8">
The number of particles emitted in one emission cycle (corresponding to the [member lifetime]).
[b]Note:[/b] Changing [member amount] will reset the particle emission, therefore removing all particles that were already emitted before changing [member amount].
</member>
<member name="draw_order" type="int" setter="set_draw_order" getter="get_draw_order" enum="Particles2D.DrawOrder" default="0">
Particle draw order. Uses [enum DrawOrder] values.
</member>
<member name="emitting" type="bool" setter="set_emitting" getter="is_emitting" default="true">
If [code]true[/code], particles are being emitted.
</member>
<member name="explosiveness" type="float" setter="set_explosiveness_ratio" getter="get_explosiveness_ratio" default="0.0">
How rapidly particles in an emission cycle are emitted. If greater than [code]0[/code], there will be a gap in emissions before the next cycle begins.
</member>
<member name="fixed_fps" type="int" setter="set_fixed_fps" getter="get_fixed_fps" default="0">
The particle system's frame rate is fixed to a value. For instance, changing the value to 2 will make the particles render at 2 frames per second. Note this does not slow down the simulation of the particle system itself.
</member>
<member name="fract_delta" type="bool" setter="set_fractional_delta" getter="get_fractional_delta" default="true">
If [code]true[/code], results in fractional delta calculation which has a smoother particles display effect.
</member>
<member name="lifetime" type="float" setter="set_lifetime" getter="get_lifetime" default="1.0">
The amount of time each particle will exist (in seconds).
</member>
<member name="local_coords" type="bool" setter="set_use_local_coordinates" getter="get_use_local_coordinates" default="true">
If [code]true[/code], particles use the parent node's coordinate space. If [code]false[/code], they use global coordinates.
</member>
<member name="normal_map" type="Texture" setter="set_normal_map" getter="get_normal_map">
Normal map to be used for the [member texture] property.
[b]Note:[/b] Godot expects the normal map to use X+, Y-, and Z+ coordinates. See [url=http://wiki.polycount.com/wiki/Normal_Map_Technical_Details#Common_Swizzle_Coordinates]this page[/url] for a comparison of normal map coordinates expected by popular engines.
</member>
<member name="one_shot" type="bool" setter="set_one_shot" getter="get_one_shot" default="false">
If [code]true[/code], only one emission cycle occurs. If set [code]true[/code] during a cycle, emission will stop at the cycle's end.
</member>
<member name="preprocess" type="float" setter="set_pre_process_time" getter="get_pre_process_time" default="0.0">
Particle system starts as if it had already run for this many seconds.
</member>
<member name="process_material" type="Material" setter="set_process_material" getter="get_process_material">
[Material] for processing particles. Can be a [ParticlesMaterial] or a [ShaderMaterial].
</member>
<member name="randomness" type="float" setter="set_randomness_ratio" getter="get_randomness_ratio" default="0.0">
Emission lifetime randomness ratio.
</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>
<member name="texture" type="Texture" setter="set_texture" getter="get_texture">
Particle texture. If [code]null[/code], particles will be squares.
</member>
<member name="visibility_rect" type="Rect2" setter="set_visibility_rect" getter="get_visibility_rect" default="Rect2( -100, -100, 200, 200 )">
The [Rect2] that determines the node's region which needs to be visible on screen for the particle system to be active.
Grow the rect if particles suddenly appear/disappear when the node enters/exits the screen. The [Rect2] can be grown via code or with the [b]Particles → Generate Visibility Rect[/b] editor tool.
</member>
</members>
<signals>
<signal name="finished">
<description>
Emitted when all active particles have finished processing. When [member one_shot] is disabled, particles will process continuously, so this is never emitted.
[b]Note:[/b] Due to the particles being computed on the GPU there might be a delay before the signal gets emitted.
</description>
</signal>
</signals>
<constants>
<constant name="DRAW_ORDER_INDEX" value="0" enum="DrawOrder">
Particles are drawn in the order emitted.
</constant>
<constant name="DRAW_ORDER_LIFETIME" value="1" enum="DrawOrder">
Particles are drawn in order of remaining lifetime.
</constant>
</constants>
</class>
36 changes: 36 additions & 0 deletions drivers/dummy/rasterizer_dummy.h
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Expand Up @@ -553,6 +553,42 @@ class RasterizerStorageDummy : public RasterizerStorage {
void instance_add_dependency(RID p_base, RasterizerScene::InstanceBase *p_instance) {}
void instance_remove_dependency(RID p_base, RasterizerScene::InstanceBase *p_instance) {}

/* PARTICLES */

RID particles_create() { return RID(); }

void particles_set_emitting(RID p_particles, bool p_emitting) {}
void particles_set_amount(RID p_particles, int p_amount) {}
void particles_set_lifetime(RID p_particles, float p_lifetime) {}
void particles_set_one_shot(RID p_particles, bool p_one_shot) {}
void particles_set_pre_process_time(RID p_particles, float p_time) {}
void particles_set_explosiveness_ratio(RID p_particles, float p_ratio) {}
void particles_set_randomness_ratio(RID p_particles, float p_ratio) {}
void particles_set_custom_aabb(RID p_particles, const AABB &p_aabb) {}
void particles_set_speed_scale(RID p_particles, float p_scale) {}
void particles_set_use_local_coordinates(RID p_particles, bool p_enable) {}
void particles_set_process_material(RID p_particles, RID p_material) {}
void particles_set_fixed_fps(RID p_particles, int p_fps) {}
void particles_set_fractional_delta(RID p_particles, bool p_enable) {}
void particles_restart(RID p_particles) {}

void particles_set_draw_order(RID p_particles, VS::ParticlesDrawOrder p_order) {}

void particles_set_draw_passes(RID p_particles, int p_count) {}
void particles_set_draw_pass_mesh(RID p_particles, int p_pass, RID p_mesh) {}

void particles_request_process(RID p_particles) {}
AABB particles_get_current_aabb(RID p_particles) { return AABB(); }
AABB particles_get_aabb(RID p_particles) const { return AABB(); }

void particles_set_emission_transform(RID p_particles, const Transform &p_transform) {}

bool particles_get_emitting(RID p_particles) { return false; }
int particles_get_draw_passes(RID p_particles) const { return 0; }
RID particles_get_draw_pass_mesh(RID p_particles, int p_pass) const { return RID(); }

virtual bool particles_is_inactive(RID p_particles) const { return false; }

/* LIGHTMAP CAPTURE */
struct Instantiable : public RID_Data {
SelfList<RasterizerScene::InstanceBase>::List instance_list;
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4 changes: 4 additions & 0 deletions drivers/gles2/rasterizer_canvas_gles2.cpp
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Expand Up @@ -1159,6 +1159,10 @@ void RasterizerCanvasGLES2::render_batches(Item *p_current_clip, bool &r_reclip,
state.uniforms.extra_matrix = transform->xform;
state.canvas_shader.set_uniform(CanvasShaderGLES2::EXTRA_MATRIX, state.uniforms.extra_matrix);
} break;

case Item::Command::TYPE_PARTICLES: {
} break;

case Item::Command::TYPE_CLIP_IGNORE: {
Item::CommandClipIgnore *ci = static_cast<Item::CommandClipIgnore *>(command);
if (p_current_clip) {
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