Improved SpatialMaterial support

Now the material node is aimed at Godot's SpatialMaterial. Textures are generated and passed to the SpatialMaterial (and not generated as shaders anymore).
Rendering textures requires a Timer (to wait for the viewport to be rendered). There has to be a better solution...
Added a couple more examples.

addons/procedural_material/graph_edit.gd

@@ -56,3 +56,41 @@ func generate_shader(node, shader_type = 0):
 	#print("GENERATED SHADER:\n"+shader_code)
 	code += shader_code
 	return code
+
+func setup_material(shader_material, textures, shader_code):
+	for k in textures.keys():
+		shader_material.set_shader_param(k+"_tex", textures[k])
+	shader_material.shader.code = shader_code
+
+
+func export_texture(node, filename, size = 256):
+	if node != null:
+		$SaveViewport.size = Vector2(size, size)
+		$SaveViewport/ColorRect.rect_position = Vector2(0, 0)
+		$SaveViewport/ColorRect.rect_size = Vector2(size, size)
+		setup_material($SaveViewport/ColorRect.material, node.get_textures(), generate_shader(node))
+		$SaveViewport.render_target_update_mode = Viewport.UPDATE_ONCE
+		$SaveViewport.update_worlds()
+		$SaveViewport/Timer.start()
+		yield($SaveViewport/Timer, "timeout")
+		var viewport_texture = $SaveViewport.get_texture()
+		var viewport_image = viewport_texture.get_data()
+		viewport_image.save_png("res://generated_image.png")
+
+func precalculate_texture(node, size, object, method, args):
+	if node == null:
+		return null
+	$SaveViewport.size = Vector2(size, size)
+	$SaveViewport/ColorRect.rect_position = Vector2(0, 0)
+	$SaveViewport/ColorRect.rect_size = Vector2(size, size)
+	setup_material($SaveViewport/ColorRect.material, node.get_textures(), generate_shader(node))
+	$SaveViewport.render_target_update_mode = Viewport.UPDATE_ONCE
+	$SaveViewport.update_worlds()
+	$SaveViewport/Timer.start()
+	yield($SaveViewport/Timer, "timeout")
+	var viewport_texture = $SaveViewport.get_texture()
+	var texture = ImageTexture.new()
+	texture.create_from_image(viewport_texture.get_data())
+	args.append(texture)
+	object.callv(method, args)
+

addons/procedural_material/nodes/material.gd

@@ -1,9 +1,18 @@
 tool
 extends "res://addons/procedural_material/node_base.gd"
 
+var texture_albedo     = null
+var texture_metallic   = null
+var texture_roughness  = null
+var texture_emission   = null
+var texture_normal_map = null
+var texture_depth_map  = null
+
+var render_queue = []   # render queue for generated textures
+var material_list = []  # materials to be updatedwith generated textures
+
 func _ready():
-	set_slot(0, true, 0, Color(0.5, 0.5, 1), false, 0, Color(0.5, 0.5, 1))
-	set_slot(1, true, 0, Color(0.5, 0.5, 1), false, 0, Color(0.5, 0.5, 1))
+	pass
 
 func _get_shader_code(uv):
 	var rv = { defs="", code="", f="0.0" }
@@ -21,3 +30,53 @@ func _get_shader_code(uv):
 
 func _get_state_variables():
 	return [ ]
+
+func update_materials(ml):
+	material_list = ml
+	render_queue = [
+		{ port= 0, texture= "albedo" },
+		{ port= 1, texture= "metallic" },
+		{ port= 2, texture= "roughness" },
+		{ port= 3, texture= "emission" },
+		{ port= 4, texture= "normal_map" },
+		{ port= 5, texture= "depth_map" }
+	]
+	process_render_queue()
+
+func process_render_queue():
+	while !render_queue.empty():
+		var job = render_queue.pop_front()
+		var source = get_source(job.port)
+		if source != null:
+			get_parent().precalculate_texture(source, 1024, self, "store_texture", [ job.texture ])
+			return
+		else:
+			set("texture_"+job.texture, null)
+	do_update_materials()
+
+func store_texture(texture_name, texture):
+	set("texture_"+texture_name, texture)
+	process_render_queue()
+
+func do_update_materials():
+	for m in material_list:
+		if m is SpatialMaterial:
+			m.albedo_texture = texture_albedo
+			m.metallic_texture = texture_metallic
+			m.roughness_texture = texture_roughness
+			if texture_emission != null:
+				m.emission_enabled = true
+				m.emission_texture = texture_emission
+			else:
+				m.emission_enabled = false
+			if texture_normal_map != null:
+				m.normal_enabled = true
+				m.normal_texture = texture_normal_map
+			else:
+				m.normal_enabled = false
+			if texture_depth_map != null:
+				m.depth_enabled = true
+				m.depth_texture = texture_depth_map
+			else:
+				m.depth_enabled = false
+

addons/procedural_material/nodes/material.tscn

@@ -39,8 +39,32 @@ slot/1/left_color = Color( 0.5, 0.5, 1, 1 )
 slot/1/right_enabled = false
 slot/1/right_type = 0
 slot/1/right_color = Color( 0.5, 0.5, 1, 1 )
+slot/2/left_enabled = true
+slot/2/left_type = 0
+slot/2/left_color = Color( 0.498039, 0.498039, 1, 1 )
+slot/2/right_enabled = false
+slot/2/right_type = 0
+slot/2/right_color = Color( 0.498039, 0.498039, 1, 1 )
+slot/3/left_enabled = true
+slot/3/left_type = 0
+slot/3/left_color = Color( 0.498039, 0.498039, 1, 1 )
+slot/3/right_enabled = false
+slot/3/right_type = 0
+slot/3/right_color = Color( 0.498039, 0.498039, 1, 1 )
+slot/4/left_enabled = true
+slot/4/left_type = 0
+slot/4/left_color = Color( 0.498039, 0.498039, 1, 1 )
+slot/4/right_enabled = false
+slot/4/right_type = 0
+slot/4/right_color = Color( 0.498039, 0.498039, 1, 1 )
+slot/5/left_enabled = true
+slot/5/left_type = 0
+slot/5/left_color = Color( 0.498039, 0.498039, 1, 1 )
+slot/5/right_enabled = false
+slot/5/right_type = 0
+slot/5/right_color = Color( 0.498039, 0.498039, 1, 1 )
 script = ExtResource( 1 )
-_sections_unfolded = [ "Theme" ]
+_sections_unfolded = [ "Theme", "slot", "slot/2", "slot/3", "slot/4", "slot/5" ]
 
 [node name="Label1" type="Label" parent="." index="0"]
 
@@ -79,9 +103,93 @@ mouse_filter = 2
 mouse_default_cursor_shape = 0
 size_flags_horizontal = 1
 size_flags_vertical = 4
+text = "Metallic"
+percent_visible = 1.0
+lines_skipped = 0
+max_lines_visible = -1
+
+[node name="Label3" type="Label" parent="." index="2"]
+
+anchor_left = 0.0
+anchor_top = 0.0
+anchor_right = 0.0
+anchor_bottom = 0.0
+margin_left = 16.0
+margin_top = 53.0
+margin_right = 95.0
+margin_bottom = 67.0
+rect_pivot_offset = Vector2( 0, 0 )
+rect_clip_content = false
+mouse_filter = 2
+mouse_default_cursor_shape = 0
+size_flags_horizontal = 1
+size_flags_vertical = 4
+text = "Roughness"
+percent_visible = 1.0
+lines_skipped = 0
+max_lines_visible = -1
+
+[node name="Label4" type="Label" parent="." index="3"]
+
+anchor_left = 0.0
+anchor_top = 0.0
+anchor_right = 0.0
+anchor_bottom = 0.0
+margin_left = 16.0
+margin_top = 68.0
+margin_right = 95.0
+margin_bottom = 82.0
+rect_pivot_offset = Vector2( 0, 0 )
+rect_clip_content = false
+mouse_filter = 2
+mouse_default_cursor_shape = 0
+size_flags_horizontal = 1
+size_flags_vertical = 4
+text = "Emission"
+percent_visible = 1.0
+lines_skipped = 0
+max_lines_visible = -1
+
+[node name="Label5" type="Label" parent="." index="4"]
+
+anchor_left = 0.0
+anchor_top = 0.0
+anchor_right = 0.0
+anchor_bottom = 0.0
+margin_left = 16.0
+margin_top = 83.0
+margin_right = 95.0
+margin_bottom = 97.0
+rect_pivot_offset = Vector2( 0, 0 )
+rect_clip_content = false
+mouse_filter = 2
+mouse_default_cursor_shape = 0
+size_flags_horizontal = 1
+size_flags_vertical = 4
 text = "Normal map"
 percent_visible = 1.0
 lines_skipped = 0
 max_lines_visible = -1
 
+[node name="Label6" type="Label" parent="." index="5"]
+
+anchor_left = 0.0
+anchor_top = 0.0
+anchor_right = 0.0
+anchor_bottom = 0.0
+margin_left = 16.0
+margin_top = 98.0
+margin_right = 95.0
+margin_bottom = 112.0
+rect_pivot_offset = Vector2( 0, 0 )
+rect_clip_content = false
+mouse_filter = 2
+mouse_default_cursor_shape = 0
+size_flags_horizontal = 1
+size_flags_vertical = 4
+text = "Depth map"
+percent_visible = 1.0
+lines_skipped = 0
+max_lines_visible = -1
+
 

addons/procedural_material/nodes/transform.tscn

@@ -5,7 +5,7 @@
 [sub_resource type="Theme" id=1]
 
 
-[node name="Transform" type="GraphNode" index="0"]
+[node name="Transform" type="GraphNode"]
 
 anchor_left = 0.0
 anchor_top = 0.0

addons/procedural_material/nodes/warp.tscn

@@ -5,7 +5,7 @@
 [sub_resource type="Theme" id=1]
 
 
-[node name="Warp" type="GraphNode" index="0"]
+[node name="Warp" type="GraphNode"]
 
 anchor_left = 0.0
 anchor_top = 0.0
@@ -120,6 +120,4 @@ _sections_unfolded = [ "Caret", "Placeholder" ]
 
 [connection signal="close_request" from="." to="." method="queue_free"]
 
-[connection signal="text_changed" from="amount" to="." method="_on_Rotate_text_changed"]
-
 

addons/procedural_material/pm_editor.gd

@@ -5,7 +5,6 @@ var popup_menu = null
 var popup_position = Vector2(0, 0)
 var selected_node = null
 
-var preview_material = null
 var texture_preview_material = null
 
 const MENU = [
@@ -28,7 +27,6 @@ const MENU = [
 
 func _ready():
 	# Duplicate the material we'll modify and store the shaders
-	preview_material = $Preview/Preview.preview_material
 	$Preview/Preview/SelectedPreview.material = $Preview/Preview/SelectedPreview.material.duplicate(true)
 	texture_preview_material = $Preview/Preview/SelectedPreview.material
 	$GraphEdit.add_valid_connection_type(0, 0)
@@ -137,34 +135,16 @@ func save_file(filename):
 		file.store_string(to_json(data))
 		file.close()
 
-func export_texture():
-	var size = 256
-	$SaveViewport.size = Vector2(size, size)
-	$SaveViewport/ColorRect.rect_position = Vector2(0, 0)
-	$SaveViewport/ColorRect.rect_size = Vector2(size, size)
-	setup_material($SaveViewport/ColorRect.material, selected_node.get_textures(), $GraphEdit.generate_shader(selected_node))
-	$SaveViewport.render_target_update_mode = Viewport.UPDATE_ONCE
-	#$SaveViewport/ColorRect.update()
-	$SaveViewport.update_worlds()
-	$SaveViewport/Timer.start()
-	yield($SaveViewport/Timer, "timeout")
-	var viewport_texture = $SaveViewport.get_texture()
-	var viewport_image = viewport_texture.get_data()
-	viewport_image.save_png("res://generated_image.png")
-
-func setup_material(shader_material, textures, shader_code):
-	for k in textures.keys():
-		#print("Setting param "+k+" to "+str(textures[k]))
-		shader_material.set_shader_param(k+"_tex", textures[k])
-	shader_material.shader.code = shader_code
+func export_texture(size = 256):
+	$GraphEdit.export_texture(selected_node, "res://generated_image.png", size)
 
 func generate_shader():
-	setup_material(preview_material, $GraphEdit/Material.get_textures(), $GraphEdit.generate_shader($GraphEdit/Material, 1))
+	$GraphEdit/Material.update_materials($Preview/Preview.get_materials())
 	if selected_node != null:
-		setup_material(texture_preview_material, selected_node.get_textures(), $GraphEdit.generate_shader(selected_node))
+		$GraphEdit.setup_material(texture_preview_material, selected_node.get_textures(), $GraphEdit.generate_shader(selected_node))
 
 func _on_GraphEdit_node_selected(node):
-	if selected_node != node:
+	if selected_node != node && node is GraphNode:
 		selected_node = node
-		setup_material(texture_preview_material, selected_node.get_textures(), $GraphEdit.generate_shader(selected_node))
+		$GraphEdit.setup_material(texture_preview_material, selected_node.get_textures(), $GraphEdit.generate_shader(selected_node))
 

addons/procedural_material/preview.gd

@@ -1,7 +1,6 @@
 tool
 extends ViewportContainer
 
-var preview_material = null
 var preview_maximized = false
 
 const ENVIRONMENTS = [
@@ -9,11 +8,9 @@ const ENVIRONMENTS = [
 ]
 
 func _ready():
-	preview_material = ShaderMaterial.new()
-	preview_material.shader = Shader.new()
-	preview_material.shader.set_code("shader_type spatial;\nvoid fragment() {\n  ALBEDO=vec3(0.5);\n}\n")
-	$MaterialPreview/Objects/Cube.set_surface_material(0, preview_material)
-	$MaterialPreview/Objects/Cylinder.set_surface_material(0, preview_material)
+	var m = $MaterialPreview/Objects/Cube.get_surface_material(0).duplicate()
+	$MaterialPreview/Objects/Cube.set_surface_material(0, m)
+	$MaterialPreview/Objects/Cylinder.set_surface_material(0, m)
 	$ObjectRotate.play("rotate")
 	_on_Environment_item_selected($Environment.selected)
 
@@ -32,3 +29,6 @@ func _on_Model_item_selected(id):
 	var model = $Model.get_item_text(id)
 	for c in $MaterialPreview/Objects.get_children():
 		c.visible = (c.get_name() == model)
+
+func get_materials():
+	return [ $MaterialPreview/Objects/Cube.get_surface_material(0) ]

examples/bricks.ptex

@@ -1 +1 @@
-{"connections":[{"from":"Bricks","from_port":0,"to":"Warp","to_port":0},{"from":"Perlin","from_port":0,"to":"Warp","to_port":1},{"from":"Warp","from_port":0,"to":"NormalMap","to_port":0},{"from":"Perlin2","from_port":0,"to":"colorize_0","to_port":0},{"from":"Perlin2","from_port":0,"to":"colorize_1","to_port":0},{"from":"Warp","from_port":0,"to":"colorize_2","to_port":0},{"from":"colorize_2","from_port":0,"to":"blend_0","to_port":2},{"from":"blend_0","from_port":0,"to":"transform_0","to_port":0},{"from":"transform_0","from_port":0,"to":"Material","to_port":0},{"from":"NormalMap","from_port":0,"to":"transform_1","to_port":0},{"from":"transform_1","from_port":0,"to":"Material","to_port":1},{"from":"colorize_1","from_port":0,"to":"blend_0","to_port":0},{"from":"colorize_0","from_port":0,"to":"blend_0","to_port":1}],"nodes":[{"iterations":7,"name":"Perlin2","node_position":{"x":258,"y":-32},"persistence":0.5,"scale_x":8,"scale_y":8,"type":"perlin"},{"bevel":0.6,"columns":6,"mortar":0.05,"name":"Bricks","node_position":{"x":260,"y":132},"row_offset":0.5,"rows":12,"type":"bricks"},{"amount":0.5,"name":"NormalMap","node_position":{"x":694,"y":297},"type":"normal_map"},{"iterations":6,"name":"Perlin","node_position":{"x":255,"y":322},"persistence":0.5,"scale_x":4,"scale_y":4,"type":"perlin"},{"amount":0.1,"name":"Warp","node_position":{"x":504,"y":199.75},"type":"warp"},{"gradient":[{"b":0,"g":0,"pos":0,"r":0},{"b":1,"g":1,"pos":0.090909,"r":1}],"name":"colorize_2","node_position":{"x":639.943665,"y":152},"type":"colorize"},{"name":"transform_1","node_position":{"x":944.779785,"y":262.75},"rotate":0,"scale":1,"type":"transform"},{"name":"Material","node_position":{"x":1165,"y":171},"type":"material"},{"gradient":[{"b":0,"g":0,"pos":0,"r":0},{"b":1,"g":1,"pos":1,"r":1}],"name":"colorize_0","node_position":{"x":560.943665,"y":50},"type":"colorize"},{"gradient":[{"b":0.002889,"g":0.102424,"pos":0,"r":0.184896},{"b":0,"g":0.19869,"pos":0.327273,"r":0.669271},{"b":0.019368,"g":0.060224,"pos":0.681818,"r":0.309896},{"b":0,"g":0.180135,"pos":1,"r":0.606771}],"name":"colorize_1","node_position":{"x":562.943665,"y":-65},"type":"colorize"},{"name":"transform_0","node_position":{"x":938.779785,"y":129.75},"rotate":0,"scale":1,"type":"transform"},{"amount":0.5,"blend_type":0,"name":"blend_0","node_position":{"x":820.943726,"y":-33},"type":"blend"}]}
+{"connections":[{"from":"Bricks","from_port":0,"to":"Warp","to_port":0},{"from":"Perlin","from_port":0,"to":"Warp","to_port":1},{"from":"Perlin2","from_port":0,"to":"colorize_0","to_port":0},{"from":"Perlin2","from_port":0,"to":"colorize_1","to_port":0},{"from":"Warp","from_port":0,"to":"colorize_2","to_port":0},{"from":"colorize_2","from_port":0,"to":"blend_0","to_port":2},{"from":"colorize_1","from_port":0,"to":"blend_0","to_port":0},{"from":"colorize_0","from_port":0,"to":"blend_0","to_port":1},{"from":"Warp","from_port":0,"to":"normal_map_0","to_port":0},{"from":"normal_map_0","from_port":0,"to":"Material","to_port":1},{"from":"Warp","from_port":0,"to":"colorize_3","to_port":0},{"from":"blend_0","from_port":0,"to":"Material","to_port":0},{"from":"colorize_3","from_port":0,"to":"Material","to_port":2}],"nodes":[{"iterations":7,"name":"Perlin2","node_position":{"x":258,"y":-32},"persistence":0.5,"scale_x":8,"scale_y":8,"type":"perlin"},{"bevel":0.2,"columns":3,"mortar":0.05,"name":"Bricks","node_position":{"x":260,"y":132},"row_offset":0.5,"rows":6,"type":"bricks"},{"iterations":6,"name":"Perlin","node_position":{"x":255,"y":322},"persistence":0.5,"scale_x":4,"scale_y":4,"type":"perlin"},{"amount":0.1,"name":"Warp","node_position":{"x":504,"y":199.75},"type":"warp"},{"gradient":[{"b":0,"g":0,"pos":0,"r":0},{"b":1,"g":1,"pos":0.072727,"r":1}],"name":"colorize_2","node_position":{"x":639.943665,"y":152},"type":"colorize"},{"gradient":[{"b":0,"g":0,"pos":0,"r":0},{"b":1,"g":1,"pos":1,"r":1}],"name":"colorize_0","node_position":{"x":560.943665,"y":50},"type":"colorize"},{"gradient":[{"b":0.002889,"g":0.102424,"pos":0,"r":0.184896},{"b":0,"g":0.19869,"pos":0.327273,"r":0.669271},{"b":0.019368,"g":0.060224,"pos":0.663636,"r":0.309896},{"b":0,"g":0.180135,"pos":1,"r":0.606771}],"name":"colorize_1","node_position":{"x":562.943665,"y":-65},"type":"colorize"},{"amount":0.5,"blend_type":0,"name":"blend_0","node_position":{"x":820.943726,"y":-33},"type":"blend"},{"name":"Material","node_position":{"x":1024,"y":204},"type":"material"},{"gradient":[{"b":0.273438,"g":0.273438,"pos":0,"r":0.273438},{"b":0,"g":0,"pos":1,"r":0}],"name":"colorize_3","node_position":{"x":688,"y":355},"type":"colorize"},{"amount":0.5,"name":"normal_map_0","node_position":{"x":721,"y":244},"type":"normal_map"}]}

examples/lava.ptex

@@ -0,0 +1 @@
+{"connections":[{"from":"perlin_0","from_port":0,"to":"blend_0","to_port":0},{"from":"blend_0","from_port":0,"to":"colorize_0","to_port":0},{"from":"colorize_0","from_port":0,"to":"Material","to_port":0},{"from":"perlin_0","from_port":0,"to":"warp_0","to_port":1},{"from":"voronoi_0","from_port":0,"to":"warp_0","to_port":0},{"from":"warp_0","from_port":0,"to":"blend_0","to_port":1},{"from":"warp_0","from_port":0,"to":"colorize_1","to_port":0},{"from":"warp_0","from_port":0,"to":"Material","to_port":1},{"from":"warp_0","from_port":0,"to":"colorize_2","to_port":0},{"from":"colorize_2","from_port":0,"to":"Material","to_port":2},{"from":"warp_0","from_port":0,"to":"normal_map_0","to_port":0},{"from":"normal_map_0","from_port":0,"to":"Material","to_port":4},{"from":"colorize_1","from_port":0,"to":"Material","to_port":3}],"nodes":[{"name":"Material","node_position":{"x":956,"y":271},"type":"material"},{"iterations":8,"name":"perlin_0","node_position":{"x":-63,"y":-34},"persistence":0.75,"scale_x":4,"scale_y":4,"type":"perlin"},{"intensity":0.55,"name":"voronoi_0","node_position":{"x":-2,"y":204},"scale_x":6,"scale_y":6,"type":"voronoi"},{"amount":0.3,"name":"warp_0","node_position":{"x":242,"y":23},"type":"warp"},{"gradient":[{"b":0.032597,"g":0.032597,"pos":0.072727,"r":0.032597},{"b":0.111979,"g":0.111979,"pos":0.3,"r":0.111979},{"b":0.029781,"g":0.029781,"pos":0.518182,"r":0.029781},{"b":0.069093,"g":0.069093,"pos":0.818182,"r":0.069093},{"b":0,"g":0,"pos":1,"r":0}],"name":"colorize_0","node_position":{"x":666,"y":27},"type":"colorize"},{"gradient":[{"b":1,"g":1,"pos":0.290909,"r":1},{"b":0,"g":0,"pos":0.8,"r":0}],"name":"colorize_2","node_position":{"x":535,"y":123.5},"type":"colorize"},{"gradient":[{"b":0,"g":0.765625,"pos":0,"r":1},{"b":0,"g":0,"pos":0.181818,"r":1},{"b":0,"g":0,"pos":0.245455,"r":0}],"name":"colorize_1","node_position":{"x":479,"y":215},"type":"colorize"},{"amount":0.9,"name":"normal_map_0","node_position":{"x":501,"y":314.5},"type":"normal_map"},{"amount":0.45,"blend_type":1,"name":"blend_0","node_position":{"x":433,"y":-87},"type":"blend"}]}

examples/wood_with_blood.ptex

@@ -0,0 +1 @@
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