gemstone

entity/gem/Hue.shader

@@ -0,0 +1,39 @@
+shader_type canvas_item;
+render_mode unshaded;
+
+uniform float Shift_Hue;
+
+void fragment() {
+// Input:3
+	vec3 input_color;
+	vec4 texture_color = texture(TEXTURE, UV);
+	input_color = texture_color.rgb;
+
+// VectorFunc:2
+	vec3 color_hsv;
+	{
+		vec3 c = input_color;
+		vec4 K = vec4(0.0, -1.0 / 3.0, 2.0 / 3.0, -1.0);
+		vec4 p = mix(vec4(c.bg, K.wz), vec4(c.gb, K.xy), step(c.b, c.g));
+		vec4 q = mix(vec4(p.xyw, c.r), vec4(c.r, p.yzx), step(p.x, c.r));
+		float d = q.x - min(q.w, q.y);
+		float e = 1.0e-10;
+		color_hsv=vec3(abs(q.z + (q.w - q.y) / (6.0 * d + e)), d / (q.x + e), q.x);
+	}
+
+	color_hsv.x = mod((color_hsv.x + Shift_Hue), 1.0f);
+
+// VectorFunc:5
+	vec3 color_rgb;
+	{
+		vec3 c = color_hsv;
+		vec4 K = vec4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);
+		vec3 p = abs(fract(c.xxx + K.xyz) * 6.0 - K.www);
+		color_rgb=c.z * mix(K.xxx, clamp(p - K.xxx, 0.0, 1.0), c.y);
+	}
+
+// Output:0
+	texture_color = vec4(color_rgb.rgb,texture_color.a);
+	COLOR.rgba = texture_color;
+
+}

entity/gem/gemstone.gd

@@ -0,0 +1,15 @@
+extends RigidBody2D
+
+
+# Called when the node enters the scene tree for the first time.
+func _ready():
+	$CollisionShape2D/Sprite.set_material($CollisionShape2D/Sprite.get_material().duplicate(true))
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta):
+	var rand_hue = float(randi() % 3)/2.0/3.2
+	#$CollisionShape2D/Sprite.material.set_shader_param("Shift_Hue", rand_hue)
+	#print($CollisionShape2D/Sprite.modulate)
+	#CollisionShape2D/Sprite.modulate = Color.from_ok_hsl(0.5,0,0.9)
+

entity/gem/gemstone.tscn

@@ -1,7 +1,9 @@
-[gd_scene load_steps=6 format=3 uid="uid://6pp1pebasum3"]
+[gd_scene load_steps=9 format=3 uid="uid://6pp1pebasum3"]
 
 [ext_resource type="PhysicsMaterial" uid="uid://c6kn1an85lccr" path="res://entity/coin_physics_material.tres" id="1_1d567"]
+[ext_resource type="Script" path="res://entity/gem/gemstone.gd" id="2_4sf3r"]
 [ext_resource type="Texture2D" uid="uid://b21bsbo5f0ed7" path="res://entity/gem/gemstone.png" id="2_gmg5g"]
+[ext_resource type="Shader" path="res://entity/gem/gemstone.gdshader" id="3_v0fk6"]
 [ext_resource type="PackedScene" uid="uid://bk1vvq5rug01m" path="res://collector/collectible.tscn" id="4_01x0a"]
 [ext_resource type="PackedScene" uid="uid://ujpra0s1kpqi" path="res://value/valuable.tscn" id="5_wdbjk"]
 
@@ -9,6 +11,10 @@
 radius = 4.0
 height = 10.0
 
+[sub_resource type="ShaderMaterial" id="ShaderMaterial_sakte"]
+shader = ExtResource("3_v0fk6")
+shader_parameter/Shift_Hue = null
+
 [node name="Gemstone" type="RigidBody2D"]
 collision_layer = 5
 collision_mask = 7
@@ -18,6 +24,7 @@ physics_material_override = ExtResource("1_1d567")
 continuous_cd = 1
 linear_damp = 0.1
 angular_damp = 0.1
+script = ExtResource("2_4sf3r")
 
 [node name="CollisionShape2D" type="CollisionShape2D" parent="."]
 scale = Vector2(2, 2)
@@ -25,6 +32,7 @@ shape = SubResource("CapsuleShape2D_130vq")
 
 [node name="Sprite" type="Sprite2D" parent="CollisionShape2D"]
 texture_filter = 1
+material = SubResource("ShaderMaterial_sakte")
 texture = ExtResource("2_gmg5g")
 
 [node name="Collectible" parent="." instance=ExtResource("4_01x0a")]

random/Hue.shader

@@ -0,0 +1,39 @@
+shader_type canvas_item;
+render_mode unshaded;
+
+uniform float Shift_Hue;
+
+void fragment() {
+// Input:3
+	vec3 input_color;
+	vec4 texture_color = texture(TEXTURE, UV);
+	input_color = texture_color.rgb;
+
+// VectorFunc:2
+	vec3 color_hsv;
+	{
+		vec3 c = input_color;
+		vec4 K = vec4(0.0, -1.0 / 3.0, 2.0 / 3.0, -1.0);
+		vec4 p = mix(vec4(c.bg, K.wz), vec4(c.gb, K.xy), step(c.b, c.g));
+		vec4 q = mix(vec4(p.xyw, c.r), vec4(c.r, p.yzx), step(p.x, c.r));
+		float d = q.x - min(q.w, q.y);
+		float e = 1.0e-10;
+		color_hsv=vec3(abs(q.z + (q.w - q.y) / (6.0 * d + e)), d / (q.x + e), q.x);
+	}
+
+	color_hsv.x = mod((color_hsv.x + Shift_Hue), 1.0f);
+
+// VectorFunc:5
+	vec3 color_rgb;
+	{
+		vec3 c = color_hsv;
+		vec4 K = vec4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);
+		vec3 p = abs(fract(c.xxx + K.xyz) * 6.0 - K.www);
+		color_rgb=c.z * mix(K.xxx, clamp(p - K.xxx, 0.0, 1.0), c.y);
+	}
+
+// Output:0
+	texture_color = vec4(color_rgb.rgb,texture_color.a);
+	COLOR.rgba = texture_color;
+
+}

spawner/Node.gd

@@ -0,0 +1,3 @@
+extends Node
+class_name GemRandomizer
+static var rng : RandomNumberGenerator = RandomNumberGenerator.new()

spawner/gemstone_spawner.gd

@@ -0,0 +1,66 @@
+extends Area2D
+class_name GemstoneSpawner
+
+## A node which spawns things!
+
+## The scene to spawn.
+@export var scene: PackedScene
+
+## The node to add new scenes to.
+@export var target: Node
+
+## Count of how many items should be spawned when possible.
+var buffer: int = 0
+
+## Maximum amount of items whose spawn can be buffered.
+@export var buffer_cap: int
+
+## Rect in which scenes can be spawned randomly in.
+@export var spawn_rect: Rect2
+
+## Minimum rotation degrees that an object can spawn with.
+@export_range(0, 360) var spawn_rotation_degrees_min: float
+
+## Maximum rotation degrees that an object can spawn with.
+@export_range(0, 360) var spawn_rotation_degrees_max: float
+
+## Maximum amount of bodies overlapping the spawner's area before the spawner stops spawning.
+@export_range(0, 16, 1, "or_greater") var overlapping_body_count_limit: int
+
+
+signal spawned(what: Node2D)
+
+func gem_roll():
+	return Randomizer.rng.randi_range(0,360)
+
+func spawn():
+	buffer += 1
+	if buffer > buffer_cap:
+		buffer = buffer_cap
+
+func _select_spawn_position() -> Vector2:
+	return Vector2(
+		Randomizer.rng.randf_range(spawn_rect.position.x, spawn_rect.end.x), 
+		Randomizer.rng.randf_range(spawn_rect.position.y, spawn_rect.end.y),
+	)
+
+func _select_spawn_rotation() -> float:
+	return Randomizer.rng.randf_range(
+		spawn_rotation_degrees_min, 
+		spawn_rotation_degrees_max
+	)
+
+func _do_spawn():
+	if len(get_overlapping_bodies()) > overlapping_body_count_limit:
+		return
+	var instantiated = scene.instantiate()
+	instantiated.
+	instantiated.global_position = global_position + _select_spawn_position()
+	instantiated.rotation_degrees = _select_spawn_rotation()
+	target.add_child(instantiated)
+	spawned.emit()
+	buffer -= 1
+
+func _physics_process(_delta):
+	if buffer > 0:
+		_do_spawn()

spawner/gemstone_spawner.tscn

@@ -0,0 +1,20 @@
+[gd_scene load_steps=5 format=3 uid="uid://cqbqoc8ftxfos"]
+
+[ext_resource type="Script" path="res://spawner/gemstone_spawner.gd" id="1_fk8ci"]
+[ext_resource type="PackedScene" uid="uid://c67lfbk4gf1ga" path="res://spawner/spawner.tscn" id="2_2di81"]
+[ext_resource type="PackedScene" uid="uid://6pp1pebasum3" path="res://entity/gem/gemstone.tscn" id="3_goofg"]
+[ext_resource type="Script" path="res://spawner/Node.gd" id="3_ra5b3"]
+
+[node name="GemstoneSpawner" type="Node2D"]
+script = ExtResource("1_fk8ci")
+buffer_cap = null
+spawn_rect = null
+spawn_rotation_degrees_min = null
+spawn_rotation_degrees_max = null
+overlapping_body_count_limit = null
+
+[node name="Spawner" parent="." instance=ExtResource("2_2di81")]
+scene = ExtResource("3_goofg")
+
+[node name="GemRandomizer" type="Node" parent="."]
+script = ExtResource("3_ra5b3")