get particle trails to work

scenes/world_grab_demo/world_grab_demo.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=50 format=3 uid="uid://bmmpivq57eehv"]
+[gd_scene load_steps=52 format=3 uid="uid://bmmpivq57eehv"]
 
 [ext_resource type="PackedScene" uid="uid://qbmx03iibuuu" path="res://addons/godot-xr-tools/staging/scene_base.tscn" id="1_6211a"]
 [ext_resource type="PackedScene" uid="uid://b4kad2kuba1yn" path="res://addons/godot-xr-tools/hands/scenes/lowpoly/left_hand_low.tscn" id="2_dss28"]
@@ -20,70 +20,69 @@
 [ext_resource type="PackedScene" uid="uid://d3x7ha0qme5uv" path="res://scenes/world_grab_demo/objects/arena_cylinder.tscn" id="15_ghqx0"]
 [ext_resource type="PackedScene" uid="uid://v1ajdy8xxct3" path="res://scenes/world_grab_demo/objects/arena_wall.tscn" id="16_bar6p"]
 [ext_resource type="Script" path="res://addons/godot-xr-tools/objects/pickable.gd" id="20_bgctf"]
-[ext_resource type="Shader" path="res://scenes/world_grab_demo/particleemission.gdshader" id="21_fpx77"]
 [ext_resource type="PackedScene" uid="uid://c25yxb0vt53vc" path="res://addons/godot-xr-tools/objects/grab_points/grab_point_hand_left.tscn" id="21_v207o"]
 [ext_resource type="PackedScene" uid="uid://ctw7nbntd5pcj" path="res://addons/godot-xr-tools/objects/grab_points/grab_point_hand_right.tscn" id="22_0w02o"]
 [ext_resource type="Script" path="res://scenes/world_grab_demo/proxy_collision_detector.gd" id="25_6xc52"]
 
-[sub_resource type="AnimationNodeAnimation" id="AnimationNodeAnimation_bqnrj"]
+[sub_resource type="AnimationNodeAnimation" id="AnimationNodeAnimation_3vdkb"]
 animation = &"Grip"
 
-[sub_resource type="AnimationNodeAnimation" id="AnimationNodeAnimation_3t3os"]
+[sub_resource type="AnimationNodeAnimation" id="AnimationNodeAnimation_7kr0y"]
 animation = &"Grip"
 
-[sub_resource type="AnimationNodeBlend2" id="AnimationNodeBlend2_8b622"]
+[sub_resource type="AnimationNodeBlend2" id="AnimationNodeBlend2_4nm7q"]
 filter_enabled = true
 filters = ["Armature/Skeleton3D:Little_Distal_L", "Armature/Skeleton3D:Little_Intermediate_L", "Armature/Skeleton3D:Little_Metacarpal_L", "Armature/Skeleton3D:Little_Proximal_L", "Armature/Skeleton3D:Middle_Distal_L", "Armature/Skeleton3D:Middle_Intermediate_L", "Armature/Skeleton3D:Middle_Metacarpal_L", "Armature/Skeleton3D:Middle_Proximal_L", "Armature/Skeleton3D:Ring_Distal_L", "Armature/Skeleton3D:Ring_Intermediate_L", "Armature/Skeleton3D:Ring_Metacarpal_L", "Armature/Skeleton3D:Ring_Proximal_L", "Armature/Skeleton3D:Thumb_Distal_L", "Armature/Skeleton3D:Thumb_Metacarpal_L", "Armature/Skeleton3D:Thumb_Proximal_L", "Armature/Skeleton:Little_Distal_L", "Armature/Skeleton:Little_Intermediate_L", "Armature/Skeleton:Little_Proximal_L", "Armature/Skeleton:Middle_Distal_L", "Armature/Skeleton:Middle_Intermediate_L", "Armature/Skeleton:Middle_Proximal_L", "Armature/Skeleton:Ring_Distal_L", "Armature/Skeleton:Ring_Intermediate_L", "Armature/Skeleton:Ring_Proximal_L", "Armature/Skeleton:Thumb_Distal_L", "Armature/Skeleton:Thumb_Proximal_L"]
 
-[sub_resource type="AnimationNodeAnimation" id="AnimationNodeAnimation_6iumx"]
+[sub_resource type="AnimationNodeAnimation" id="AnimationNodeAnimation_ovax6"]
 animation = &"Grip 5"
 
-[sub_resource type="AnimationNodeBlend2" id="AnimationNodeBlend2_s3sux"]
+[sub_resource type="AnimationNodeBlend2" id="AnimationNodeBlend2_pgpwm"]
 filter_enabled = true
 filters = ["Armature/Skeleton3D:Index_Distal_L", "Armature/Skeleton3D:Index_Intermediate_L", "Armature/Skeleton3D:Index_Metacarpal_L", "Armature/Skeleton3D:Index_Proximal_L", "Armature/Skeleton:Index_Distal_L", "Armature/Skeleton:Index_Intermediate_L", "Armature/Skeleton:Index_Proximal_L"]
 
-[sub_resource type="AnimationNodeBlendTree" id="AnimationNodeBlendTree_x7e1t"]
+[sub_resource type="AnimationNodeBlendTree" id="AnimationNodeBlendTree_jpbdj"]
 graph_offset = Vector2(-536, 11)
-nodes/ClosedHand1/node = SubResource("AnimationNodeAnimation_bqnrj")
+nodes/ClosedHand1/node = SubResource("AnimationNodeAnimation_3vdkb")
 nodes/ClosedHand1/position = Vector2(-600, 300)
-nodes/ClosedHand2/node = SubResource("AnimationNodeAnimation_3t3os")
+nodes/ClosedHand2/node = SubResource("AnimationNodeAnimation_7kr0y")
 nodes/ClosedHand2/position = Vector2(-360, 300)
-nodes/Grip/node = SubResource("AnimationNodeBlend2_8b622")
+nodes/Grip/node = SubResource("AnimationNodeBlend2_4nm7q")
 nodes/Grip/position = Vector2(0, 20)
-nodes/OpenHand/node = SubResource("AnimationNodeAnimation_6iumx")
+nodes/OpenHand/node = SubResource("AnimationNodeAnimation_ovax6")
 nodes/OpenHand/position = Vector2(-600, 100)
-nodes/Trigger/node = SubResource("AnimationNodeBlend2_s3sux")
+nodes/Trigger/node = SubResource("AnimationNodeBlend2_pgpwm")
 nodes/Trigger/position = Vector2(-360, 20)
 node_connections = [&"Grip", 0, &"Trigger", &"Grip", 1, &"ClosedHand2", &"Trigger", 0, &"OpenHand", &"Trigger", 1, &"ClosedHand1", &"output", 0, &"Grip"]
 
-[sub_resource type="AnimationNodeAnimation" id="AnimationNodeAnimation_27rpp"]
+[sub_resource type="AnimationNodeAnimation" id="AnimationNodeAnimation_l2u0t"]
 animation = &"Grip"
 
-[sub_resource type="AnimationNodeAnimation" id="AnimationNodeAnimation_v75qo"]
+[sub_resource type="AnimationNodeAnimation" id="AnimationNodeAnimation_1lcrd"]
 animation = &"Grip"
 
-[sub_resource type="AnimationNodeBlend2" id="AnimationNodeBlend2_7xn8u"]
+[sub_resource type="AnimationNodeBlend2" id="AnimationNodeBlend2_1v0hg"]
 filter_enabled = true
 filters = ["Armature/Skeleton3D:Little_Distal_R", "Armature/Skeleton3D:Little_Intermediate_R", "Armature/Skeleton3D:Little_Metacarpal_R", "Armature/Skeleton3D:Little_Proximal_R", "Armature/Skeleton3D:Middle_Distal_R", "Armature/Skeleton3D:Middle_Intermediate_R", "Armature/Skeleton3D:Middle_Metacarpal_R", "Armature/Skeleton3D:Middle_Proximal_R", "Armature/Skeleton3D:Ring_Distal_R", "Armature/Skeleton3D:Ring_Intermediate_R", "Armature/Skeleton3D:Ring_Metacarpal_R", "Armature/Skeleton3D:Ring_Proximal_R", "Armature/Skeleton3D:Thumb_Distal_R", "Armature/Skeleton3D:Thumb_Metacarpal_R", "Armature/Skeleton3D:Thumb_Proximal_R", "Armature/Skeleton:Little_Distal_R", "Armature/Skeleton:Little_Intermediate_R", "Armature/Skeleton:Little_Proximal_R", "Armature/Skeleton:Middle_Distal_R", "Armature/Skeleton:Middle_Intermediate_R", "Armature/Skeleton:Middle_Proximal_R", "Armature/Skeleton:Ring_Distal_R", "Armature/Skeleton:Ring_Intermediate_R", "Armature/Skeleton:Ring_Proximal_R", "Armature/Skeleton:Thumb_Distal_R", "Armature/Skeleton:Thumb_Proximal_R"]
 
-[sub_resource type="AnimationNodeAnimation" id="AnimationNodeAnimation_3x7no"]
+[sub_resource type="AnimationNodeAnimation" id="AnimationNodeAnimation_7nt6p"]
 animation = &"Grip 5"
 
-[sub_resource type="AnimationNodeBlend2" id="AnimationNodeBlend2_qbiuo"]
+[sub_resource type="AnimationNodeBlend2" id="AnimationNodeBlend2_6ca5g"]
 filter_enabled = true
 filters = ["Armature/Skeleton3D:Index_Distal_R", "Armature/Skeleton3D:Index_Intermediate_R", "Armature/Skeleton3D:Index_Metacarpal_R", "Armature/Skeleton3D:Index_Proximal_R", "Armature/Skeleton:Index_Distal_R", "Armature/Skeleton:Index_Intermediate_R", "Armature/Skeleton:Index_Proximal_R"]
 
-[sub_resource type="AnimationNodeBlendTree" id="AnimationNodeBlendTree_oefd4"]
+[sub_resource type="AnimationNodeBlendTree" id="AnimationNodeBlendTree_n54dk"]
 graph_offset = Vector2(-552.664, 107.301)
-nodes/ClosedHand1/node = SubResource("AnimationNodeAnimation_27rpp")
+nodes/ClosedHand1/node = SubResource("AnimationNodeAnimation_l2u0t")
 nodes/ClosedHand1/position = Vector2(-600, 300)
-nodes/ClosedHand2/node = SubResource("AnimationNodeAnimation_v75qo")
+nodes/ClosedHand2/node = SubResource("AnimationNodeAnimation_1lcrd")
 nodes/ClosedHand2/position = Vector2(-360, 300)
-nodes/Grip/node = SubResource("AnimationNodeBlend2_7xn8u")
+nodes/Grip/node = SubResource("AnimationNodeBlend2_1v0hg")
 nodes/Grip/position = Vector2(0, 40)
-nodes/OpenHand/node = SubResource("AnimationNodeAnimation_3x7no")
+nodes/OpenHand/node = SubResource("AnimationNodeAnimation_7nt6p")
 nodes/OpenHand/position = Vector2(-600, 100)
-nodes/Trigger/node = SubResource("AnimationNodeBlend2_qbiuo")
+nodes/Trigger/node = SubResource("AnimationNodeBlend2_6ca5g")
 nodes/Trigger/position = Vector2(-360, 40)
 node_connections = [&"Grip", 0, &"Trigger", &"Grip", 1, &"ClosedHand2", &"Trigger", 0, &"OpenHand", &"Trigger", 1, &"ClosedHand1", &"output", 0, &"Grip"]
 
@@ -97,39 +96,52 @@ colors = PackedColorArray(0.764539, 0.208898, 0.642811, 1, 1, 1, 3, 1)
 gradient = SubResource("Gradient_ns6ft")
 use_hdr = true
 
+[sub_resource type="Curve" id="Curve_gunvg"]
+_data = [Vector2(0, 1), 0.0, 0.0, 0, 0, Vector2(0.905229, 0.968574), 0.0, 0.0, 0, 0, Vector2(1, 0), 0.0, 0.0, 0, 0]
+point_count = 3
+
+[sub_resource type="CurveTexture" id="CurveTexture_kjesk"]
+curve = SubResource("Curve_gunvg")
+
 [sub_resource type="ParticleProcessMaterial" id="ParticleProcessMaterial_2xajy"]
 resource_local_to_scene = true
 emission_shape = 3
 emission_box_extents = Vector3(0.1, 0.1, 0.1)
-spread = 32.23
+spread = 0.0
 initial_velocity_min = 1.0
 initial_velocity_max = 1.0
 gravity = Vector3(0, 0, 0)
+damping_min = 0.03
+damping_max = 0.03
+scale_max = 1.3
+scale_curve = SubResource("CurveTexture_kjesk")
+color = Color(0.407056, 0.407056, 0.407056, 1)
 color_ramp = SubResource("GradientTexture1D_s10f1")
-turbulence_enabled = true
+hue_variation_min = -0.1
+hue_variation_max = 0.1
 turbulence_influence_min = 0.001
 turbulence_influence_max = 0.001
 
-[sub_resource type="ShaderMaterial" id="ShaderMaterial_av6ib"]
+[sub_resource type="Curve" id="Curve_u2ul3"]
-render_priority = 0
+_data = [Vector2(0, 0), 0.0, 0.0, 0, 0, Vector2(0.149718, 0.977694), 0.0, 0.0, 0, 0, Vector2(1, 0), 0.0, 0.0, 0, 0]
-shader = ExtResource("21_fpx77")
+point_count = 3
-shader_parameter/albedo = Color(1, 1, 1, 1)
-shader_parameter/point_size = null
-shader_parameter/roughness = 1.0
-shader_parameter/metallic_texture_channel = null
-shader_parameter/specular = null
-shader_parameter/metallic = null
-shader_parameter/emission = Color(0.813308, 0.000389282, 0.784183, 1)
-shader_parameter/emission_energy = 11.71
-shader_parameter/uv1_scale = null
-shader_parameter/uv1_offset = null
-shader_parameter/uv2_scale = null
-shader_parameter/uv2_offset = null
 
-[sub_resource type="QuadMesh" id="QuadMesh_avrt1"]
+[sub_resource type="StandardMaterial3D" id="StandardMaterial3D_f3np2"]
-resource_local_to_scene = true
+shading_mode = 2
-material = SubResource("ShaderMaterial_av6ib")
+vertex_color_use_as_albedo = true
-size = Vector2(0.01, 0.01)
+vertex_color_is_srgb = true
+emission_enabled = true
+emission = Color(1, 1, 3, 1)
+disable_receive_shadows = true
+use_particle_trails = true
+
+[sub_resource type="TubeTrailMesh" id="TubeTrailMesh_ij0c8"]
+material = SubResource("StandardMaterial3D_f3np2")
+radius = 0.002
+radial_steps = 4
+cap_top = false
+cap_bottom = false
+curve = SubResource("Curve_u2ul3")
 
 [sub_resource type="SphereShape3D" id="SphereShape3D_0m1dj"]
 radius = 0.1
@@ -193,7 +205,7 @@ bone_idx = 9
 
 [node name="AnimationTree" parent="XROrigin3D/LeftHand/LeftHand" index="1"]
 root_node = NodePath("../Hand_Nails_low_L")
-tree_root = SubResource("AnimationNodeBlendTree_x7e1t")
+tree_root = SubResource("AnimationNodeBlendTree_jpbdj")
 
 [node name="FunctionPickup" parent="XROrigin3D/LeftHand" index="1" instance=ExtResource("3_gbd4b")]
 
@@ -232,7 +244,7 @@ bone_idx = 9
 
 [node name="AnimationTree" parent="XROrigin3D/RightHand/RightHand" index="1"]
 root_node = NodePath("../Hand_Nails_low_R")
-tree_root = SubResource("AnimationNodeBlendTree_oefd4")
+tree_root = SubResource("AnimationNodeBlendTree_n54dk")
 
 [node name="FunctionPickup" parent="XROrigin3D/RightHand" index="1" instance=ExtResource("3_gbd4b")]
 
@@ -347,17 +359,20 @@ transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, -6)
 title = ExtResource("10_phcsg")
 
 [node name="GPUParticles3D" type="GPUParticles3D" parent="." index="5"]
-transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, -2.45237, 5, 0)
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, -2.45466, 4.99148, -1.22583)
-amount = 20000
+amount = 1000
 lifetime = 10.0
 preprocess = 5.0
 randomness = 0.18
-visibility_aabb = AABB(-400, -400, -400, 400, 400, 400)
+visibility_aabb = AABB(-200, -200, -200, 400, 400, 400)
+transform_align = 2
+trail_enabled = true
+trail_lifetime = 0.5
 process_material = SubResource("ParticleProcessMaterial_2xajy")
-draw_pass_1 = SubResource("QuadMesh_avrt1")
+draw_pass_1 = SubResource("TubeTrailMesh_ij0c8")
 
 [node name="XRToolsPickable" type="RigidBody3D" parent="." index="6"]
-transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.09547, 0.0904029)
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, -3.62977, 4.43671, 2.79928)
 collision_layer = 4
 collision_mask = 7
 gravity_scale = 0.0
@@ -370,9 +385,8 @@ second_hand_grab = 1
 shape = SubResource("SphereShape3D_0m1dj")
 
 [node name="GPUParticlesAttractorSphere3D" type="GPUParticlesAttractorSphere3D" parent="XRToolsPickable" index="1"]
-strength = 5.41
+strength = 8.77
-attenuation = 1e-05
+attenuation = 0.476839
-radius = 43.42
 
 [node name="GrabPointHandLeft" parent="XRToolsPickable" index="2" instance=ExtResource("21_v207o")]
 
@@ -409,6 +423,26 @@ mesh = SubResource("CapsuleMesh_tq84j")
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 1.86311, 3.12102, 2.64291)
 mesh = SubResource("CapsuleMesh_tq84j")
 
+[node name="GPUParticlesAttractorSphere3D" type="GPUParticlesAttractorSphere3D" parent="." index="12"]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, -0.738619, 5.16399, -1.42534)
+visible = false
+strength = 4.54
+attenuation = 3.05175e-05
+directionality = 1.0
+
+[node name="GPUParticlesAttractorBox3D" type="GPUParticlesAttractorBox3D" parent="." index="13"]
+transform = Transform3D(-0.375399, 0, -0.926863, 0, 1, 0, 0.926863, 0, -0.375399, -4.37762, 5.08607, 0.745364)
+strength = 6.9
+attenuation = 8.57421
+directionality = 1.0
+
+[node name="GPUParticlesAttractorBox3D2" type="GPUParticlesAttractorBox3D" parent="." index="14"]
+transform = Transform3D(0.283513, 0, -0.958968, 0, 1, 0, 0.958968, 0, 0.283513, 0.731089, 5.39206, -2.86171)
+strength = -18.85
+attenuation = 0.801942
+directionality = 1.0
+size = Vector3(5, 5, 5)
+
 [editable path="XROrigin3D/LeftHand/LeftHand"]
 [editable path="XROrigin3D/LeftHand/LeftHand/Hand_Nails_low_L"]
 [editable path="XROrigin3D/RightHand/RightHand"]