Remove animation loop from ParticlesMaterial + improvements to CPUParticles2D

Remove animation loop from ParticlesMaterial and move it to
SpatialMaterial for 3D particles and Particles2D for the 2D case.

Added animation to CPUParticles2D as well as the "Convert to
CPUParticles2D" to the PAarticles2D menu.

2 files changed, 24 insertions, 1 deletions

diff --git a/editor/plugins/particles_2d_editor_plugin.cpp b/editor/plugins/particles_2d_editor_plugin.cpp
index 5dcbca2ed6..ab94258c44 100644
--- a/editor/plugins/particles_2d_editor_plugin.cpp
+++ b/editor/plugins/particles_2d_editor_plugin.cpp
@@ -32,6 +32,7 @@
 
 #include "canvas_item_editor_plugin.h"
 #include "core/io/image_loader.h"
+#include "scene/2d/cpu_particles_2d.h"
 #include "scene/gui/separator.h"
 #include "scene/resources/particles_material.h"
 
@@ -82,6 +83,25 @@ void Particles2DEditorPlugin::_menu_callback(int p_idx) {
 
 			emission_mask->popup_centered_minsize();
 		} break;
+		case MENU_OPTION_CONVERT_TO_CPU_PARTICLES: {
+
+			UndoRedo *undo_redo = EditorNode::get_singleton()->get_undo_redo();
+
+			CPUParticles2D *cpu_particles = memnew(CPUParticles2D);
+			cpu_particles->convert_from_particles(particles);
+			cpu_particles->set_name(particles->get_name());
+			cpu_particles->set_transform(particles->get_transform());
+			cpu_particles->set_visible(particles->is_visible());
+			cpu_particles->set_pause_mode(particles->get_pause_mode());
+
+			undo_redo->create_action("Replace Particles by CPUParticles");
+			undo_redo->add_do_method(particles, "replace_by", cpu_particles);
+			undo_redo->add_undo_method(cpu_particles, "replace_by", particles);
+			undo_redo->add_do_reference(cpu_particles);
+			undo_redo->add_undo_reference(particles);
+			undo_redo->commit_action();
+
+		} break;
 	}
 }
 
@@ -355,6 +375,8 @@ Particles2DEditorPlugin::Particles2DEditorPlugin(EditorNode *p_node) {
 	menu->get_popup()->add_separator();
 	menu->get_popup()->add_item(TTR("Load Emission Mask"), MENU_LOAD_EMISSION_MASK);
 	//	menu->get_popup()->add_item(TTR("Clear Emission Mask"), MENU_CLEAR_EMISSION_MASK);
+	menu->get_popup()->add_separator();
+	menu->get_popup()->add_item(TTR("Convert to CPUParticles"), MENU_OPTION_CONVERT_TO_CPU_PARTICLES);
 	menu->set_text(TTR("Particles"));
 	toolbar->add_child(menu);
 
diff --git a/editor/plugins/particles_2d_editor_plugin.h b/editor/plugins/particles_2d_editor_plugin.h
index 71ca8ef499..eaa96d84e9 100644
--- a/editor/plugins/particles_2d_editor_plugin.h
+++ b/editor/plugins/particles_2d_editor_plugin.h
@@ -46,7 +46,8 @@ class Particles2DEditorPlugin : public EditorPlugin {
 
 		MENU_GENERATE_VISIBILITY_RECT,
 		MENU_LOAD_EMISSION_MASK,
-		MENU_CLEAR_EMISSION_MASK
+		MENU_CLEAR_EMISSION_MASK,
+		MENU_OPTION_CONVERT_TO_CPU_PARTICLES
 	};
 
 	enum EmissionMode {