Add circle spawn demo project

See goostengine/goost#28.

2d/spawn/circle_spawn.gd

@@ -0,0 +1,59 @@
+extends Node2D
+
+enum Type {
+	CIRCLE,
+	RING,
+}
+export(Type) var type = Type.CIRCLE setget set_type
+export var count := 500 setget set_count
+export var min_radius := 0.0 setget set_min_radius
+export var max_radius := 0.0 setget set_max_radius
+
+
+func set_type(p_type):
+	type = p_type
+	call_deferred("spawn")
+
+
+func set_count(p_count):
+	count = p_count
+	call_deferred("spawn")
+
+
+func set_min_radius(p_min_radius):
+	min_radius = p_min_radius
+	call_deferred("spawn")
+
+
+func set_max_radius(p_max_radius):
+	max_radius = p_max_radius
+	call_deferred("spawn")
+
+
+func _ready():
+	randomize()
+	if max_radius <= 0.0:
+		# Fit screen size.
+		max_radius = get_viewport().size.y / 2
+		# Make sure sprites are not clipped by viewport.
+		max_radius -= preload("res://icon.png").get_size().length()
+	if min_radius <= 0.0:
+		min_radius = max_radius / 2
+	spawn()
+
+
+func spawn():
+	for child in get_children():
+		if child is Sprite:
+			child.queue_free()
+	for i in count:
+		var goost = preload("res://goost.tscn").instance()
+		add_child(goost)
+		# Spawn a sprite at random position within a circle radius.
+		var point = Vector2()
+		match type:
+			Type.CIRCLE:
+				point = GoostGeometry2D.rand_point_in_circle(max_radius)
+			Type.RING:
+				point = GoostGeometry2D.rand_point_in_ring(min_radius, max_radius)
+		goost.global_position = point

2d/spawn/circle_spawn.tscn

@@ -0,0 +1,12 @@
+[gd_scene load_steps=2 format=2]
+
+[ext_resource path="res://circle_spawn.gd" type="Script" id=1]
+
+[node name="circle_spawn" type="Node2D"]
+script = ExtResource( 1 )
+
+[node name="camera" type="Camera2D" parent="."]
+current = true
+__meta__ = {
+"_editor_description_": "Displays sprites centered."
+}

2d/spawn/goost.tscn

@@ -0,0 +1,6 @@
+[gd_scene load_steps=2 format=2]
+
+[ext_resource path="res://icon.png" type="Texture" id=1]
+
+[node name="goost" type="Sprite"]
+texture = ExtResource( 1 )

2d/spawn/icon.png.import

@@ -0,0 +1,34 @@
+[remap]
+
+importer="texture"
+type="StreamTexture"
+path="res://.import/icon.png-487276ed1e3a0c39cad0279d744ee560.stex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://icon.png"
+dest_files=[ "res://.import/icon.png-487276ed1e3a0c39cad0279d744ee560.stex" ]
+
+[params]
+
+compress/mode=0
+compress/lossy_quality=0.7
+compress/hdr_mode=0
+compress/bptc_ldr=0
+compress/normal_map=0
+flags/repeat=0
+flags/filter=true
+flags/mipmaps=false
+flags/anisotropic=false
+flags/srgb=2
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/HDR_as_SRGB=false
+process/invert_color=false
+stream=false
+size_limit=0
+detect_3d=true
+svg/scale=1.0

2d/spawn/project.godot

@@ -0,0 +1,17 @@
+; Engine configuration file.
+; It's best edited using the editor UI and not directly,
+; since the parameters that go here are not all obvious.
+;
+; Format:
+;   [section] ; section goes between []
+;   param=value ; assign values to parameters
+
+config_version=4
+
+[application]
+
+config/name="Goost Spawn"
+run/main_scene="res://circle_spawn.tscn"
+boot_splash/image="res://icon.png"
+boot_splash/fullsize=false
+config/icon="res://icon.png"