Moved MMLoader to autoload. Updated demo so it can be exported.

addons/material_maker/engine/gen_base.gd

@@ -40,11 +40,11 @@ var seed_value : int = 0
 const PORT_TYPE_NAMES : Array = [ "f", "rgb", "rgba", "sdf2d", "sdf3d" ]
 
 const PORT_TYPES : Dictionary = {
-	f     = { type="float", paramdefs="vec2 uv", params="uv", slot_type=0, color=Color(0.5, 0.5, 0.5) },
-	rgb   = { type="vec3", paramdefs="vec2 uv", params="uv", slot_type=0, color=Color(0.5, 0.5, 1.0) },
-	rgba  = { type="vec4", paramdefs="vec2 uv", params="uv", slot_type=0, color=Color(0.0, 0.5, 0.0, 0.5) },
-	sdf2d = { type="float", paramdefs="vec2 uv", params="uv", slot_type=1, color=Color(1.0, 0.5, 0.0) },
-	sdf3d = { type="float", paramdefs="vec3 p", params="p", slot_type=2, color=Color(1.0, 0.0, 0.0) },
+	f     = { label="Greyscale", type="float", paramdefs="vec2 uv", params="uv", slot_type=0, color=Color(0.5, 0.5, 0.5) },
+	rgb   = { label="Color", type="vec3", paramdefs="vec2 uv", params="uv", slot_type=0, color=Color(0.5, 0.5, 1.0) },
+	rgba  = { label="RGBA", type="vec4", paramdefs="vec2 uv", params="uv", slot_type=0, color=Color(0.0, 0.5, 0.0, 0.5) },
+	sdf2d = { label="SDF2D", type="float", paramdefs="vec2 uv", params="uv", slot_type=1, color=Color(1.0, 0.5, 0.0) },
+	sdf3d = { label="SDF3D", type="float", paramdefs="vec3 p", params="p", slot_type=2, color=Color(1.0, 0.0, 0.0) },
 	any = { slot_type=42, color=Color(1.0, 1.0, 1.0) }
 }
 
@@ -165,6 +165,75 @@ func get_input_shader(input_index : int) -> Dictionary:
 func get_shader(output_index : int, context) -> Dictionary:
 	return get_shader_code("UV", output_index, context)
 
+func generate_preview_shader(src_code) -> String:
+	var code
+	code = "shader_type canvas_item;\n"
+	code += "render_mode blend_disabled;\n"
+	code += "uniform float preview_size = 64;\n"
+	var file = File.new()
+	file.open("res://addons/material_maker/common.shader", File.READ)
+	code += file.get_as_text()
+	code += "\n"
+	if src_code.has("textures"):
+		for t in src_code.textures.keys():
+			code += "uniform sampler2D "+t+";\n"
+	if src_code.has("globals"):
+		for g in src_code.globals:
+			code += g
+	var shader_code = src_code.defs
+	if src_code.has("rgba"):
+		shader_code += "\nvoid fragment() {\n"
+		shader_code += "vec2 uv = UV;\n"
+		shader_code += src_code.code
+		shader_code += "COLOR = "+src_code.rgba+";\n"
+		shader_code += "}\n"
+	elif src_code.has("sdf2d"):
+		shader_code += "\nvoid fragment() {\n"
+		shader_code += "vec2 uv = UV;\n"
+		shader_code += src_code.code
+		shader_code += "float d = "+src_code.sdf2d+";\n"
+		shader_code += "vec3 col = vec3(cos(d*min(256, preview_size)));\n"
+		shader_code += "col *= clamp(1.0-d*d, 0.0, 1.0);\n"
+		shader_code += "col *= vec3(1.0, vec2(step(-0.015, d)));\n"
+		shader_code += "col *= vec3(vec2(step(d, 0.015)), 1.0);\n"
+		shader_code += "COLOR = vec4(col, 1.0);\n"
+		shader_code += "}\n"
+	elif src_code.has("sdf3d"):
+		shader_code += "\nfloat calcdist(vec3 uv) {\n"
+		shader_code += src_code.code
+		shader_code += "return min("+src_code.sdf3d+", uv.z);\n"
+		shader_code += "}\n"
+		shader_code += "float raymarch(vec3 ro, vec3 rd) {\n"
+		shader_code += "float d=0.0;\n"
+		shader_code += "for (int i = 0; i < 50; i++) {\n"
+		shader_code += "vec3 p = ro + rd*d;\n"
+		shader_code += "float dstep = calcdist(p);\n"
+		shader_code += "d += dstep;\n"
+		shader_code += "if (dstep < 0.0001) break;\n"
+		shader_code += "}\n"
+		shader_code += "return d;\n"
+		shader_code += "}\n"
+		shader_code += "vec3 normal(vec3 p) {\n"
+		shader_code += "	float d = calcdist(p);\n"
+		shader_code += "    float e = .0001;\n"
+		shader_code += "    vec3 n = d - vec3(calcdist(p-vec3(e, 0.0, 0.0)), calcdist(p-vec3(0.0, e, 0.0)), calcdist(p-vec3(0.0, 0.0, e)));\n"
+		shader_code += "    return normalize(n);\n"
+		shader_code += "}\n"
+		shader_code += "\nvoid fragment() {\n"
+		shader_code += "vec2 uv = UV-vec2(0.5);\n"
+		shader_code += "vec3 p = vec3(uv, 2.0-raymarch(vec3(uv, 2.0), vec3(0.0, 0.0, -1.0)));\n"
+		shader_code += "vec3 n = normal(p);\n"
+		shader_code += "vec3 l = vec3(5.0, 5.0, 10.0);\n"
+		shader_code += "vec3 ld = normalize(l-p);\n"
+		shader_code += "float o = step(p.z, 0.001);\n"
+		shader_code += "float shadow = 1.0-0.75*step(raymarch(l, -ld), length(l-p)-0.01);\n"
+		shader_code += "float light = 0.3+0.7*dot(n, ld)*shadow;\n"
+		shader_code += "COLOR = vec4(vec3(0.8+0.2*o, 0.8+0.2*o, 1.0)*light, 1.0);\n"
+		shader_code += "}\n"
+	#print("GENERATED SHADER:\n"+shader_code)
+	code += shader_code
+	return code
+
 func render(output_index : int, size : int, preview : bool = false) -> Object:
 	var context : MMGenContext = MMGenContext.new()
 	var source = get_shader_code("uv", output_index, context)
@@ -174,7 +243,11 @@ func render(output_index : int, size : int, preview : bool = false) -> Object:
 		source = { defs="", code="", textures={}, rgba="vec4(0.0)" }
 	var shader : String
 	if preview:
-		shader = mm_renderer.generate_preview_shader(source)
+		var outputs = get_output_defs()
+		if outputs.size() > output_index:
+			var output = outputs[output_index]
+			print(output)
+		shader = generate_preview_shader(source)
 	else:
 		shader = mm_renderer.generate_shader(source)
 	var result = mm_renderer.render_shader(shader, source.textures, size)

addons/material_maker/engine/gen_graph.gd

@@ -332,4 +332,4 @@ func _deserialize(data : Dictionary) -> void:
 		label = data.label
 	var nodes = data.nodes if data.has("nodes") else []
 	var connections = data.connections if data.has("connections") else []
-	load("res://addons/material_maker/engine/loader.gd").add_to_gen_graph(self, nodes, connections)
+	mm_loader.add_to_gen_graph(self, nodes, connections)

addons/material_maker/engine/loader.gd

@@ -1,23 +1,25 @@
 tool
-extends Object
-class_name MMGenLoader
+extends Node
 
 const STD_GENDEF_PATH = "res://addons/material_maker/nodes"
 
-static func generator_name_from_path(path : String) -> String:
+func _ready():
+	print("loader ready!")
+
+func generator_name_from_path(path : String) -> String:
 	for p in [ STD_GENDEF_PATH, OS.get_executable_path().get_base_dir()+"/generators" ]:
 		print(p)
 	print(path.get_base_dir())
 	return path.get_basename().get_file()
 
-static func load_gen(filename: String) -> MMGenBase:
+func load_gen(filename: String) -> MMGenBase:
 	var file = File.new()
 	if file.open(filename, File.READ) == OK:
 		var data = parse_json(file.get_as_text())
 		return create_gen(data)
 	return null
 
-static func add_to_gen_graph(gen_graph, generators, connections) -> Dictionary:
+func add_to_gen_graph(gen_graph, generators, connections) -> Dictionary:
 	var rv = { generators=[], connections=[] }
 	var gennames = {}
 	for n in generators:
@@ -35,7 +37,7 @@ static func add_to_gen_graph(gen_graph, generators, connections) -> Dictionary:
 				rv.connections.append(c)
 	return rv
 
-static func create_gen(data) -> MMGenBase:
+func create_gen(data) -> MMGenBase:
 	var guess = [
 		{ keyword="connections", type=MMGenGraph },
 		{ keyword="nodes", type=MMGenGraph },
@@ -88,7 +90,7 @@ static func create_gen(data) -> MMGenBase:
 		generator.deserialize(data)
 	return generator
 
-static func get_generator_list() -> Array:
+func get_generator_list() -> Array:
 	var rv = []
 	var dir : Directory = Directory.new()
 	for p in [ STD_GENDEF_PATH, OS.get_executable_path().get_base_dir()+"/generators" ]:

addons/material_maker/engine/renderer.gd

@@ -38,75 +38,6 @@ static func generate_shader(src_code) -> String:
 	code += shader_code
 	return code
 
-static func generate_preview_shader(src_code) -> String:
-	var code
-	code = "shader_type canvas_item;\n"
-	code += "render_mode blend_disabled;\n"
-	code += "uniform float preview_size = 64;\n"
-	var file = File.new()
-	file.open("res://addons/material_maker/common.shader", File.READ)
-	code += file.get_as_text()
-	code += "\n"
-	if src_code.has("textures"):
-		for t in src_code.textures.keys():
-			code += "uniform sampler2D "+t+";\n"
-	if src_code.has("globals"):
-		for g in src_code.globals:
-			code += g
-	var shader_code = src_code.defs
-	if src_code.has("rgba"):
-		shader_code += "\nvoid fragment() {\n"
-		shader_code += "vec2 uv = UV;\n"
-		shader_code += src_code.code
-		shader_code += "COLOR = "+src_code.rgba+";\n"
-		shader_code += "}\n"
-	elif src_code.has("sdf2d"):
-		shader_code += "\nvoid fragment() {\n"
-		shader_code += "vec2 uv = UV;\n"
-		shader_code += src_code.code
-		shader_code += "float d = "+src_code.sdf2d+";\n"
-		shader_code += "vec3 col = vec3(cos(d*min(256, preview_size)));\n"
-		shader_code += "col *= clamp(1.0-d*d, 0.0, 1.0);\n"
-		shader_code += "col *= vec3(1.0, vec2(step(-0.015, d)));\n"
-		shader_code += "col *= vec3(vec2(step(d, 0.015)), 1.0);\n"
-		shader_code += "COLOR = vec4(col, 1.0);\n"
-		shader_code += "}\n"
-	elif src_code.has("sdf3d"):
-		shader_code += "\nfloat calcdist(vec3 uv) {\n"
-		shader_code += src_code.code
-		shader_code += "return min("+src_code.sdf3d+", uv.z);\n"
-		shader_code += "}\n"
-		shader_code += "float raymarch(vec3 ro, vec3 rd) {\n"
-		shader_code += "float d=0.0;\n"
-		shader_code += "for (int i = 0; i < 50; i++) {\n"
-		shader_code += "vec3 p = ro + rd*d;\n"
-		shader_code += "float dstep = calcdist(p);\n"
-		shader_code += "d += dstep;\n"
-		shader_code += "if (dstep < 0.0001) break;\n"
-		shader_code += "}\n"
-		shader_code += "return d;\n"
-		shader_code += "}\n"
-		shader_code += "vec3 normal(vec3 p) {\n"
-		shader_code += "	float d = calcdist(p);\n"
-		shader_code += "    float e = .0001;\n"
-		shader_code += "    vec3 n = d - vec3(calcdist(p-vec3(e, 0.0, 0.0)), calcdist(p-vec3(0.0, e, 0.0)), calcdist(p-vec3(0.0, 0.0, e)));\n"
-		shader_code += "    return normalize(n);\n"
-		shader_code += "}\n"
-		shader_code += "\nvoid fragment() {\n"
-		shader_code += "vec2 uv = UV-vec2(0.5);\n"
-		shader_code += "vec3 p = vec3(uv, 2.0-raymarch(vec3(uv, 2.0), vec3(0.0, 0.0, -1.0)));\n"
-		shader_code += "vec3 n = normal(p);\n"
-		shader_code += "vec3 l = vec3(5.0, 5.0, 10.0);\n"
-		shader_code += "vec3 ld = normalize(l-p);\n"
-		shader_code += "float o = step(p.z, 0.001);\n"
-		shader_code += "float shadow = 1.0-0.75*step(raymarch(l, -ld), length(l-p)-0.01);\n"
-		shader_code += "float light = 0.3+0.7*dot(n, ld)*shadow;\n"
-		shader_code += "COLOR = vec4(vec3(0.8+0.2*o, 0.8+0.2*o, 1.0)*light, 1.0);\n"
-		shader_code += "}\n"
-	#print("GENERATED SHADER:\n"+shader_code)
-	code += shader_code
-	return code
-
 static func generate_combined_shader(red_code, green_code, blue_code) -> String:
 	var code
 	code = "shader_type canvas_item;\n"

addons/material_maker/import_plugin/ptex_spatial_material.gd

@@ -13,8 +13,7 @@ func set_ptex(s : String) -> void :
 	call_deferred("update_texture")
 
 func update_texture() -> void:
-	var loader = MMGenLoader.new()
-	var mm_graph = loader.create_gen(parse_json(ptex))
+	var mm_graph = mm_loader.create_gen(parse_json(ptex))
 	if mm_graph == null:
 		return
 	var mm_material : MMGenMaterial = mm_graph.get_node("Material")

addons/material_maker/plugin.gd

@@ -13,7 +13,7 @@ func _exit_tree() -> void:
 		importer = null
 
 func generate_material(ptex_filename: String) -> Material:
-	var generator = MMGenLoader.load_gen(ptex_filename)
+	var generator = mm_loader.load_gen(ptex_filename)
 	add_child(generator)
 	if generator.has_node("Material"):
 		var gen_material = generator.get_node("Material")

demo/demo.tscn

@@ -1,13 +1,16 @@
-[gd_scene load_steps=8 format=2]
+[gd_scene load_steps=10 format=2]
 
-[ext_resource path="res://material_maker/examples/skulls.ptex" type="Material" id=1]
+[ext_resource path="res://material_maker/examples/bricks.ptex" type="Material" id=1]
 [ext_resource path="res://material_maker/preview/panoramas/studio_sky.tres" type="Environment" id=2]
+[ext_resource path="res://demo/object.tscn" type="PackedScene" id=3]
+[ext_resource path="res://material_maker/examples/marble.ptex" type="Material" id=4]
+[ext_resource path="res://material_maker/examples/medieval_wall.ptex" type="Material" id=5]
+[ext_resource path="res://material_maker/examples/floor1.ptex" type="Material" id=6]
+[ext_resource path="res://material_maker/examples/beehive.ptex" type="Material" id=7]
 
-[sub_resource type="SphereMesh" id=1]
-
-[sub_resource type="Animation" id=2]
+[sub_resource type="Animation" id=1]
 resource_name = "rotate"
-length = 10.0
+length = 5.0
 loop = true
 tracks/0/type = "value"
 tracks/0/path = NodePath("CamPivot:rotation_degrees")
@@ -16,68 +19,66 @@ tracks/0/loop_wrap = true
 tracks/0/imported = false
 tracks/0/enabled = true
 tracks/0/keys = {
-"times": PoolRealArray( 0, 10 ),
+"times": PoolRealArray( 0, 5 ),
 "transitions": PoolRealArray( 1, 1 ),
 "update": 0,
 "values": [ Vector3( 0, 0, 0 ), Vector3( 0, 360, 0 ) ]
 }
 
-[sub_resource type="SpatialMaterial" id=4]
-flags_unshaded = true
-flags_do_not_receive_shadows = true
-
-[sub_resource type="SphereMesh" id=5]
-material = SubResource( 4 )
-radius = 0.1
-height = 0.2
-
-[sub_resource type="Animation" id=3]
-resource_name = "rotate"
-length = 5.0
+[sub_resource type="Animation" id=2]
+resource_name = "move"
+length = 50.0
 loop = true
 tracks/0/type = "value"
-tracks/0/path = NodePath("LightPivot:rotation_degrees")
+tracks/0/path = NodePath("CamPivot:translation")
 tracks/0/interp = 1
 tracks/0/loop_wrap = true
 tracks/0/imported = false
 tracks/0/enabled = true
 tracks/0/keys = {
-"times": PoolRealArray( 0, 5 ),
-"transitions": PoolRealArray( 1, 1 ),
+"times": PoolRealArray( 0, 4, 5, 9, 10, 14, 15, 19, 20, 24, 25, 29, 30, 34, 35, 39, 40, 44, 45, 49 ),
+"transitions": PoolRealArray( 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 ),
 "update": 0,
-"values": [ Vector3( 0, 0, 0 ), Vector3( 360, 0, 0 ) ]
+"values": [ Vector3( 0, 0, 0 ), Vector3( 0, 0, 0 ), Vector3( 0, 0, -5 ), Vector3( 0, 0, -5 ), Vector3( 0, 0, -10 ), Vector3( 0, 0, -10 ), Vector3( 0, 0, -15 ), Vector3( 0, 0, -15 ), Vector3( 0, 0, -20 ), Vector3( 0, 0, -20 ), Vector3( 0, 0, -25 ), Vector3( 0, 0, -25 ), Vector3( 0, 0, -20 ), Vector3( 0, 0, -20 ), Vector3( 0, 0, -15 ), Vector3( 0, 0, -15 ), Vector3( 0, 0, -10 ), Vector3( 0, 0, -10 ), Vector3( 0, 0, -5 ), Vector3( 0, 0, -5 ) ]
 }
 
 [node name="Spatial" type="Spatial"]
 
-[node name="MeshInstance" type="MeshInstance" parent="."]
-mesh = SubResource( 1 )
-material/0 = ExtResource( 1 )
-
 [node name="CamPivot" type="Spatial" parent="."]
-transform = Transform( 0.982287, 0, 0.187381, 0, 1, 0, -0.187381, 0, 0.982287, 0, 0, 0 )
+transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, -5 )
 
 [node name="Camera" type="Camera" parent="CamPivot"]
 transform = Transform( 0.999487, 0.0319038, 0.00268748, -0.0319038, 0.985399, 0.167245, 0.00268751, -0.167245, 0.985912, 0.28563, 0.826821, 2.79088 )
 
 [node name="CamRotate" type="AnimationPlayer" parent="."]
 autoplay = "rotate"
-anims/rotate = SubResource( 2 )
+anims/rotate = SubResource( 1 )
 
-[node name="LightPivot" type="Spatial" parent="."]
-transform = Transform( 1, 0, 0, 0, 0.929776, -0.368125, 0, 0.368125, 0.929776, 0, 0, 0 )
+[node name="CamMove" type="AnimationPlayer" parent="."]
+autoplay = "move"
+anims/move = SubResource( 2 )
 
-[node name="OmniLight" type="OmniLight" parent="LightPivot"]
-transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0.0746527, 1.74306, 0 )
+[node name="Skulls" parent="." instance=ExtResource( 3 )]
 
-[node name="MeshInstance" type="MeshInstance" parent="LightPivot/OmniLight"]
-cast_shadow = 0
-mesh = SubResource( 5 )
-material/0 = null
+[node name="Bricks" parent="." instance=ExtResource( 3 )]
+transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, -5 )
+material/0 = ExtResource( 1 )
 
-[node name="LightRotate" type="AnimationPlayer" parent="."]
-autoplay = "rotate"
-anims/rotate = SubResource( 3 )
+[node name="Floor" parent="." instance=ExtResource( 3 )]
+transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, -10 )
+material/0 = ExtResource( 6 )
+
+[node name="Marble" parent="." instance=ExtResource( 3 )]
+transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, -15 )
+material/0 = ExtResource( 4 )
+
+[node name="MedievalWall" parent="." instance=ExtResource( 3 )]
+transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, -20 )
+material/0 = ExtResource( 5 )
+
+[node name="BeeHive" parent="." instance=ExtResource( 3 )]
+transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, -25 )
+material/0 = ExtResource( 7 )
 
 [node name="WorldEnvironment" type="WorldEnvironment" parent="."]
 environment = ExtResource( 2 )

demo/object.tscn

@@ -0,0 +1,49 @@
+[gd_scene load_steps=6 format=2]
+
+[ext_resource path="res://material_maker/examples/skulls.ptex" type="Material" id=1]
+
+[sub_resource type="SphereMesh" id=1]
+
+[sub_resource type="SpatialMaterial" id=2]
+flags_unshaded = true
+flags_do_not_receive_shadows = true
+
+[sub_resource type="SphereMesh" id=3]
+material = SubResource( 2 )
+radius = 0.1
+height = 0.2
+
+[sub_resource type="Animation" id=4]
+length = 5.0
+loop = true
+tracks/0/type = "value"
+tracks/0/path = NodePath("LightPivot:rotation_degrees")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/keys = {
+"times": PoolRealArray( 0, 5 ),
+"transitions": PoolRealArray( 1, 1 ),
+"update": 0,
+"values": [ Vector3( 0, 0, 0 ), Vector3( 360, 0, 0 ) ]
+}
+
+[node name="MeshInstance" type="MeshInstance"]
+mesh = SubResource( 1 )
+material/0 = ExtResource( 1 )
+
+[node name="LightPivot" type="Spatial" parent="."]
+transform = Transform( 1, 0, 0, 0, 0.929776, -0.368125, 0, 0.368125, 0.929776, 0, 0, 0 )
+
+[node name="OmniLight" type="OmniLight" parent="LightPivot"]
+transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0.0746527, 1.74306, 0 )
+
+[node name="MeshInstance" type="MeshInstance" parent="LightPivot/OmniLight"]
+cast_shadow = 0
+mesh = SubResource( 3 )
+material/0 = null
+
+[node name="LightRotate" type="AnimationPlayer" parent="."]
+autoplay = "rotate"
+anims/rotate = SubResource( 4 )

material_maker/examples/beehive.ptex.import

@@ -12,4 +12,4 @@ dest_files=[ "res://.import/beehive.ptex-51715262d81c1a144e9a7e141a45db7f.tres"
 [params]
 
 render=false
-scale=1.0
+scale=3.0

material_maker/examples/bricks.ptex.import

@@ -12,4 +12,4 @@ dest_files=[ "res://.import/bricks.ptex-8a4a409b5b41c018677a6156ef3f93e5.tres" ]
 [params]
 
 render=false
-scale=1.0
+scale=3.0

material_maker/examples/floor1.ptex.import

@@ -12,4 +12,4 @@ dest_files=[ "res://.import/floor1.ptex-fb54baf7242d73ad5e0d97d70fc2ffe8.tres" ]
 [params]
 
 render=false
-scale=1.0
+scale=3.0

material_maker/examples/marble.ptex.import

@@ -12,4 +12,4 @@ dest_files=[ "res://.import/marble.ptex-0b7e8ced36657d462bfe938e53d1f73b.tres" ]
 [params]
 
 render=false
-scale=1.0
+scale=3.0

material_maker/examples/medieval_wall.ptex.import

@@ -12,4 +12,4 @@ dest_files=[ "res://.import/medieval_wall.ptex-28369316aeb5d9dfca15a3cfe9753817.
 [params]
 
 render=false
-scale=1.0
+scale=3.0

material_maker/graph_edit.gd

@@ -169,8 +169,7 @@ func update_graph(generators, connections) -> Array:
 
 func new_material() -> void:
 	clear_material()
-	var loader = MMGenLoader.new()
-	top_generator = loader.create_gen({nodes=[{name="Material", type="material","parameters":{"size":11}}], connections=[]})
+	top_generator = mm_loader.create_gen({nodes=[{name="Material", type="material","parameters":{"size":11}}], connections=[]})
 	if top_generator != null:
 		add_child(top_generator)
 		move_child(top_generator, 0)
@@ -194,7 +193,7 @@ func create_nodes(data, position : Vector2 = Vector2(0, 0)) -> Array:
 	if data.has("type"):
 		data = { nodes=[data], connections=[] }
 	if typeof(data.nodes) == TYPE_ARRAY and typeof(data.connections) == TYPE_ARRAY:
-		var new_stuff = MMGenLoader.add_to_gen_graph(generator, data.nodes, data.connections)
+		var new_stuff = mm_loader.add_to_gen_graph(generator, data.nodes, data.connections)
 		for g in new_stuff.generators:
 			g.position += position
 		return update_graph(new_stuff.generators, new_stuff.connections)
@@ -205,7 +204,7 @@ func create_gen_from_type(gen_name) -> void:
 
 func load_file(filename) -> void:
 	clear_material()
-	top_generator = MMGenLoader.load_gen(filename)
+	top_generator = mm_loader.load_gen(filename)
 	if top_generator != null:
 		add_child(top_generator)
 		move_child(top_generator, 0)

material_maker/main_window.gd

@@ -195,7 +195,7 @@ func add_recent(path) -> void:
 	f.close()
 
 func create_menu_create(menu) -> void:
-	var gens = MMGenLoader.get_generator_list()
+	var gens = mm_loader.get_generator_list()
 	menu.clear()
 	for i in gens.size():
 		menu.add_item(gens[i], i)
@@ -205,7 +205,7 @@ func create_menu_create(menu) -> void:
 func _on_Create_id_pressed(id) -> void:
 	var graph_edit : MMGraphEdit = get_current_graph_edit()
 	if graph_edit != null:
-		var gens = MMGenLoader.get_generator_list()
+		var gens = mm_loader.get_generator_list()
 		graph_edit.create_gen_from_type(gens[id])
 
 func menu_about_to_show(name, menu) -> void:

material_maker/nodes/debug.gd

@@ -1,6 +1,6 @@
 extends MMGraphNodeBase
 
-static func generate_shader(src_code) -> String:
+static func generate_debug_shader(src_code) -> String:
 	var code
 	code = ""
 	var file = File.new()
@@ -32,4 +32,4 @@ func _on_Button_pressed() -> void:
 		var source = src.generator.get_shader_code("UV", src.output_index, context)
 		var popup = preload("res://material_maker/nodes/debug/debug_popup.tscn").instance()
 		get_parent().add_child(popup)
-		popup.show_code(generate_shader(source))
+		popup.show_code(generate_debug_shader(source))

material_maker/nodes/generic.gd

@@ -320,9 +320,9 @@ func do_load_generator(file_name : String) -> void:
 			new_generator.set_shader_model(parse_json(file.get_as_text()))
 			file.close()
 	else:
-		new_generator = MMGenLoader.load_gen(file_name)
+		new_generator = mm_loader.load_gen(file_name)
 	if new_generator != null:
-		var gen_name = MMGenLoader.generator_name_from_path(file_name)
+		var gen_name = mm_loader.generator_name_from_path(file_name)
 		if gen_name != "":
 			new_generator.model = gen_name
 		var parent_generator = generator.get_parent()

project.godot

@@ -64,11 +64,6 @@ _global_script_classes=[ {
 "language": "GDScript",
 "path": "res://addons/material_maker/engine/gen_image.gd"
 }, {
-"base": "Object",
-"class": "MMGenLoader",
-"language": "GDScript",
-"path": "res://addons/material_maker/engine/loader.gd"
-}, {
 "base": "MMGenBase",
 "class": "MMGenMaterial",
 "language": "GDScript",
@@ -156,7 +151,6 @@ _global_script_class_icons={
 "MMGenGraph": "",
 "MMGenIOs": "",
 "MMGenImage": "",
-"MMGenLoader": "",
 "MMGenMaterial": "",
 "MMGenRemote": "",
 "MMGenRenderer": "",
@@ -178,7 +172,7 @@ _global_script_class_icons={
 
 config/name="Material Maker"
 config/description="An open source, extensible procedural material generation tool"
-run/main_scene="res://material_maker/main_window.tscn"
+run/main_scene="res://start.tscn"
 config/use_custom_user_dir=true
 config/custom_user_dir_name="material_maker"
 boot_splash/image="res://rodz_labs_logo.png"
@@ -189,6 +183,7 @@ config/release="0.8"
 
 [autoload]
 
+mm_loader="*res://addons/material_maker/engine/loader.gd"
 mm_renderer="*res://addons/material_maker/engine/renderer.tscn"
 
 [debug]

start.gd

@@ -0,0 +1,11 @@
+extends Control
+
+func _ready():
+	print("Loading...")
+	call_deferred("change_scene")
+
+func change_scene():
+	if Directory.new().file_exists("res://material_maker/main_window.tscn"):
+		get_tree().change_scene("res://material_maker/main_window.tscn")
+	else:
+		get_tree().change_scene("res://demo/demo.tscn")

start.tscn

@@ -0,0 +1,11 @@
+[gd_scene load_steps=2 format=2]
+
+[ext_resource path="res://start.gd" type="Script" id=1]
+
+[node name="Start" type="Control"]
+anchor_right = 1.0
+anchor_bottom = 1.0
+script = ExtResource( 1 )
+__meta__ = {
+"_edit_use_anchors_": false
+}