first commit

addons/zylann.hterrain/tools/brush/settings_dialog/preview_scratchpad.gd

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+@tool
+extends Control
+
+const HT_PreviewPainter = preload("./preview_painter.gd")
+# TODO Can't preload because it causes the plugin to fail loading if assets aren't imported
+#const HT_DefaultBrushTexture = preload("../shapes/round2.exr")
+const HT_Brush = preload("../brush.gd")
+const HT_Logger = preload("../../../util/logger.gd")
+const HT_EditorUtil = preload("../../util/editor_util.gd")
+const HT_Util = preload("../../../util/util.gd")
+
+@onready var _texture_rect : TextureRect = $TextureRect
+@onready var _painter : HT_PreviewPainter = $Painter
+
+var _logger := HT_Logger.get_for(self)
+
+
+func _ready():
+	if HT_Util.is_in_edited_scene(self):
+		# If it runs in the edited scene,
+		# saving the scene would also save the ImageTexture in it...
+		return
+	reset_image()
+	# Default so it doesn't crash when painting and can be tested
+	var default_brush_texture = \
+		HT_EditorUtil.load_texture(HT_Brush.DEFAULT_BRUSH_TEXTURE_PATH, _logger)
+	_painter.get_brush().set_shapes([default_brush_texture])
+
+
+func reset_image():
+	var image = Image.create(_texture_rect.size.x, _texture_rect.size.y, false, Image.FORMAT_RGB8)
+	image.fill(Color(1,1,1))
+	
+	# TEST
+#	var fnl = FastNoiseLite.new()
+#	for y in image.get_height():
+#		for x in image.get_width():
+#			var g = 0.5 + 0.5 * fnl.get_noise_2d(x, y)
+#			image.set_pixel(x, y, Color(g, g, g, 1.0))
+	
+	var texture = ImageTexture.create_from_image(image)
+	_texture_rect.texture = texture
+	_painter.set_image_texture(image, texture)
+
+
+func get_painter() -> HT_PreviewPainter:
+	return _painter
+
+
+func _gui_input(event):
+	if event is InputEventMouseMotion:
+		if Input.is_mouse_button_pressed(MOUSE_BUTTON_LEFT):
+			_painter.paint_input(event.position, event.pressure)
+		queue_redraw()
+	
+	elif event is InputEventMouseButton:
+		if event.button_index == MOUSE_BUTTON_LEFT:
+			if event.pressed:
+				# TODO `pressure` is not available on button events
+				# So I have to assume zero... which means clicks do not paint anything?
+				_painter.paint_input(event.position, 0.0)
+			else:
+				_painter.get_brush().on_paint_end()
+
+
+func _draw():
+	var mpos = get_local_mouse_position()
+	var brush = _painter.get_brush()
+	draw_arc(mpos, 0.5 * brush.get_size(), -PI, PI, 32, Color(1, 0.2, 0.2), 2.0, true)
+