Add 3D editor gizmo icons for Decal, LightmapProbe and FogVolume

- Tweak CPUParticles3D editor gizmo icon to use the same outline
  color as other gizmo icons. Make the internal icon easier to see
  by using an orange color instead of gray.

Co-authored-by: MewPurPur <[email protected]>

editor/icons/GizmoCPUParticles3D.svg

@@ -1 +1 @@
-<svg height="128" viewBox="0 0 128 128" width="128" xmlns="http://www.w3.org/2000/svg"><path d="M36.688 4a6.112 6.112 0 0 0-6.112 6.112v4.8h-9.6a6.112 6.112 0 0 0-6.112 6.112v9.6h-4.8a6.112 6.112 0 0 0-6.112 6.112v3.2a6.112 6.112 0 0 0 6.112 6.112h4.8v36h-4.8a6.112 6.112 0 0 0-6.112 6.112v3.2a6.112 6.112 0 0 0 6.112 6.112h4.8v9.6a6.112 6.112 0 0 0 6.112 6.112h9.6v4.8a6.112 6.112 0 0 0 6.112 6.112h3.2A6.112 6.112 0 0 0 46 117.984v-4.8h36v4.8a6.112 6.112 0 0 0 6.112 6.112h3.2a6.112 6.112 0 0 0 6.112-6.112v-4.8h9.6a6.112 6.112 0 0 0 6.112-6.112v-9.6h4.8a6.112 6.112 0 0 0 6.112-6.112v-3.2a6.112 6.112 0 0 0-6.112-6.112h-4.8v-36h4.8a6.112 6.112 0 0 0 6.112-6.112v-3.2a6.112 6.112 0 0 0-6.112-6.112h-4.8v-9.6a6.112 6.112 0 0 0-6.112-6.104h-9.6v-4.8a6.112 6.112 0 0 0-6.112-6.112h-3.2A6.112 6.112 0 0 0 82 10.12v4.8H46v-4.8a6.112 6.112 0 0 0-6.112-6.112z" fill="#f7f5cf" stroke="#b3b3b3" stroke-width="3"/><path d="M88 82a18 18 0 0 0 2.484-35.814 27 30 0 0 0-52.944 0 18 18 0 0 0 2.484 35.802zm-48 6a6 6 0 0 0 0 12 6 6 0 0 0 0-12zm48 0a6 6 0 0 0 0 12 6 6 0 0 0 0-12zm-24 6a6 6 0 0 0 0 12 6 6 0 0 0 0-12z" fill="#b3b3b3"/></svg>
+<svg height="128" viewBox="0 0 128 128" width="128" xmlns="http://www.w3.org/2000/svg"><path d="M36.688 4a6.112 6.112 0 0 0-6.112 6.112v4.8h-9.6a6.112 6.112 0 0 0-6.112 6.112v9.6h-4.8a6.112 6.112 0 0 0-6.112 6.112v3.2a6.112 6.112 0 0 0 6.112 6.112h4.8v36h-4.8a6.112 6.112 0 0 0-6.112 6.112v3.2a6.112 6.112 0 0 0 6.112 6.112h4.8v9.6a6.112 6.112 0 0 0 6.112 6.112h9.6v4.8a6.112 6.112 0 0 0 6.112 6.112h3.2A6.112 6.112 0 0 0 46 117.984v-4.8h36v4.8a6.112 6.112 0 0 0 6.112 6.112h3.2a6.112 6.112 0 0 0 6.112-6.112v-4.8h9.6a6.112 6.112 0 0 0 6.112-6.112v-9.6h4.8a6.112 6.112 0 0 0 6.112-6.112v-3.2a6.112 6.112 0 0 0-6.112-6.112h-4.8v-36h4.8a6.112 6.112 0 0 0 6.112-6.112v-3.2a6.112 6.112 0 0 0-6.112-6.112h-4.8v-9.6a6.112 6.112 0 0 0-6.112-6.104h-9.6v-4.8a6.112 6.112 0 0 0-6.112-6.112h-3.2A6.112 6.112 0 0 0 82 10.12v4.8H46v-4.8a6.112 6.112 0 0 0-6.112-6.112z" stroke="#000" stroke-width="8" stroke-opacity=".3"/><path d="M36.688 4a6.112 6.112 0 0 0-6.112 6.112v4.8h-9.6a6.112 6.112 0 0 0-6.112 6.112v9.6h-4.8a6.112 6.112 0 0 0-6.112 6.112v3.2a6.112 6.112 0 0 0 6.112 6.112h4.8v36h-4.8a6.112 6.112 0 0 0-6.112 6.112v3.2a6.112 6.112 0 0 0 6.112 6.112h4.8v9.6a6.112 6.112 0 0 0 6.112 6.112h9.6v4.8a6.112 6.112 0 0 0 6.112 6.112h3.2A6.112 6.112 0 0 0 46 117.984v-4.8h36v4.8a6.112 6.112 0 0 0 6.112 6.112h3.2a6.112 6.112 0 0 0 6.112-6.112v-4.8h9.6a6.112 6.112 0 0 0 6.112-6.112v-9.6h4.8a6.112 6.112 0 0 0 6.112-6.112v-3.2a6.112 6.112 0 0 0-6.112-6.112h-4.8v-36h4.8a6.112 6.112 0 0 0 6.112-6.112v-3.2a6.112 6.112 0 0 0-6.112-6.112h-4.8v-9.6a6.112 6.112 0 0 0-6.112-6.104h-9.6v-4.8a6.112 6.112 0 0 0-6.112-6.112h-3.2A6.112 6.112 0 0 0 82 10.12v4.8H46v-4.8a6.112 6.112 0 0 0-6.112-6.112z" fill="#f7f5cf"/><path d="M88 82a18 18 0 0 0 2.484-35.814 27 30 0 0 0-52.944 0 18 18 0 0 0 2.484 35.802zm-48 6a6 6 0 0 0 0 12 6 6 0 0 0 0-12zm48 0a6 6 0 0 0 0 12 6 6 0 0 0 0-12zm-24 6a6 6 0 0 0 0 12 6 6 0 0 0 0-12z" fill="#e1b44c"/></svg>

editor/icons/GizmoDecal.svg

@@ -0,0 +1 @@
+<svg height="128" viewBox="0 0 128 128" width="128" xmlns="http://www.w3.org/2000/svg"><circle cx="64" cy="64" fill="none" stroke="#000" stroke-width="8" stroke-opacity=".3" r="48"/><path d="M111.313 55.934a48 48 0 1 0-71.28 49.528z" fill="#f7f5cf"/><path d="M111.313 55.934a48 48 0 0 0-71.28 49.528z" fill="#e1b44c"/><path d="M40.033 105.462a48 48 0 0 0 71.28-49.528z" fill="#f7f5cf" fill-opacity=".4"/></svg>

editor/icons/GizmoFogVolume.svg

@@ -0,0 +1 @@
+<svg height="128" viewBox="0 0 128 128" width="128" xmlns="http://www.w3.org/2000/svg"><path d="M20 68S8 68 8 56s16-12 16-12 0-32 28-32 28 24 28 24 10.08-16 24-8 4 24 4 24 12 0 12 8-8 8-8 8zm16 8a4 4 0 0 0 0 8h64a4 4 0 0 0 0-8zm-8 16a4 4 0 0 0 0 8h40a4 4 0 0 0 0-8zm56 0a4 4 0 0 0 0 8h20a4 4 0 0 0 0-8zm-40 16a4 4 0 0 0 0 8h40a4 4 0 0 0 0-8z" stroke="#000" stroke-width="8" stroke-opacity=".3"/><path d="M20 68S8 68 8 56s16-12 16-12 0-32 28-32 28 24 28 24 10.08-16 24-8 4 24 4 24 12 0 12 8-8 8-8 8zm16 8a4 4 0 0 0 0 8h64a4 4 0 0 0 0-8zm-8 16a4 4 0 0 0 0 8h40a4 4 0 0 0 0-8zm56 0a4 4 0 0 0 0 8h20a4 4 0 0 0 0-8zm-40 16a4 4 0 0 0 0 8h40a4 4 0 0 0 0-8z" fill="#f7f5cf"/></svg>

editor/icons/GizmoLightmapProbe.svg

@@ -0,0 +1 @@
+<svg height="128" viewBox="0 0 128 128" width="128" xmlns="http://www.w3.org/2000/svg"><path d="M8 72h24V56H8zm16.4 20.28 11.32 11.312L47.032 92.28 35.72 80.968zm0-56.56 11.32 11.312L47.032 35.72 35.72 24.4zM40 64a24 24 0 0 0 48 0 24 24 0 0 0-48 0zm24 56A56 56 0 0 0 64 8v18.672a37.328 37.328 0 0 1 0 74.656z" stroke="#000" stroke-width="8" stroke-opacity=".3"/><path d="M8 72h24V56H8zm16.4 20.28 11.32 11.312L47.032 92.28 35.72 80.968zm0-56.56 11.32 11.312L47.032 35.72 35.72 24.4zM40 64a24 24 0 0 0 48 0 24 24 0 0 0-48 0zm24 56A56 56 0 0 0 64 8v18.672a37.328 37.328 0 0 1 0 74.656z" fill="#f7f5cf"/></svg>

editor/plugins/gizmos/decal_gizmo_plugin.cpp

@@ -30,7 +30,9 @@
 
 #include "decal_gizmo_plugin.h"
 
+#include "editor/editor_node.h"
 #include "editor/editor_settings.h"
+#include "editor/editor_string_names.h"
 #include "editor/editor_undo_redo_manager.h"
 #include "editor/plugins/node_3d_editor_plugin.h"
 #include "scene/3d/decal.h"
@@ -38,6 +40,8 @@
 DecalGizmoPlugin::DecalGizmoPlugin() {
 	Color gizmo_color = EDITOR_DEF("editors/3d_gizmos/gizmo_colors/decal", Color(0.6, 0.5, 1.0));
 
+	create_icon_material("decal_icon", EditorNode::get_singleton()->get_editor_theme()->get_icon(SNAME("GizmoDecal"), EditorStringName(EditorIcons)));
+
 	create_material("decal_material", gizmo_color);
 
 	create_handle_material("handles");
@@ -162,7 +166,9 @@ void DecalGizmoPlugin::redraw(EditorNode3DGizmo *p_gizmo) {
 	}
 
 	Ref<Material> material = get_material("decal_material", p_gizmo);
+	const Ref<Material> icon = get_material("decal_icon", p_gizmo);
 
 	p_gizmo->add_lines(lines, material);
+	p_gizmo->add_unscaled_billboard(icon, 0.05);
 	p_gizmo->add_handles(handles, get_material("handles"));
 }

editor/plugins/gizmos/fog_volume_gizmo_plugin.cpp

@@ -30,7 +30,9 @@
 
 #include "fog_volume_gizmo_plugin.h"
 
+#include "editor/editor_node.h"
 #include "editor/editor_settings.h"
+#include "editor/editor_string_names.h"
 #include "editor/editor_undo_redo_manager.h"
 #include "editor/plugins/node_3d_editor_plugin.h"
 #include "scene/3d/fog_volume.h"
@@ -41,6 +43,8 @@ FogVolumeGizmoPlugin::FogVolumeGizmoPlugin() {
 	gizmo_color.a = 0.15;
 	create_material("shape_material_internal", gizmo_color);
 
+	create_icon_material("fog_volume_icon", EditorNode::get_singleton()->get_editor_theme()->get_icon(SNAME("GizmoFogVolume"), EditorStringName(EditorIcons)));
+
 	create_handle_material("handles");
 }
 
@@ -143,6 +147,8 @@ void FogVolumeGizmoPlugin::redraw(EditorNode3DGizmo *p_gizmo) {
 
 		p_gizmo->add_lines(lines, material);
 		p_gizmo->add_collision_segments(lines);
+		const Ref<Material> icon = get_material("fog_volume_icon", p_gizmo);
+		p_gizmo->add_unscaled_billboard(icon, 0.05);
 		p_gizmo->add_handles(handles, handles_material);
 	}
 }

editor/plugins/gizmos/lightmap_probe_gizmo_plugin.cpp

@@ -30,11 +30,15 @@
 
 #include "lightmap_probe_gizmo_plugin.h"
 
+#include "editor/editor_node.h"
 #include "editor/editor_settings.h"
+#include "editor/editor_string_names.h"
 #include "editor/plugins/node_3d_editor_plugin.h"
 #include "scene/3d/lightmap_probe.h"
 
 LightmapProbeGizmoPlugin::LightmapProbeGizmoPlugin() {
+	create_icon_material("lightmap_probe_icon", EditorNode::get_singleton()->get_editor_theme()->get_icon(SNAME("GizmoLightmapProbe"), EditorStringName(EditorIcons)));
+
 	Color gizmo_color = EDITOR_DEF("editors/3d_gizmos/gizmo_colors/lightprobe_lines", Color(0.5, 0.6, 1));
 
 	gizmo_color.a = 0.3;
@@ -111,5 +115,8 @@ void LightmapProbeGizmoPlugin::redraw(EditorNode3DGizmo *p_gizmo) {
 		}
 	}
 
+	const Ref<Material> icon = get_material("lightmap_probe_icon", p_gizmo);
+
 	p_gizmo->add_lines(lines, material_lines);
+	p_gizmo->add_unscaled_billboard(icon, 0.05);
 }