removed the tool ENUM and fix of the hardness bug

- enum {PAINT, BLUR, FILL, SAMPLE, DISPLACE}
- _match_tool func

 * replaced with a function call.
---------
+ hardness now works on all blend modes.

addons/vpainter/vpainter.gd

@@ -16,8 +16,8 @@ var blend_mode = MIX
 enum {STANDART, INFLATE, MOVE, SMOOTH}
 var sculpt_mode = STANDART
 
-enum {PAINT, BLUR, FILL, SAMPLE, DISPLACE}
-var current_tool = PAINT
+var current_tool = "_paint_tool"
+
 
 var invert_brush = false
 
@@ -60,8 +60,7 @@ func forward_spatial_gui_input(camera, event) -> bool:
 	if raycast_hit:
 		return _user_input(event) #the returned value blocks or unblocks the default input from godot
 	else:
-		return true
-
+		return false
 
 func _user_input(event) -> bool:
 	if event is InputEventMouseButton and event.button_index == BUTTON_LEFT:
@@ -87,26 +86,16 @@ func _user_input(event) -> bool:
 
 func _process_drawing():
 	while process_drawing:
-		_match_tool()
+		call(current_tool)
 		yield(get_tree().create_timer(brush_spacing), "timeout")
 
-func _match_tool() -> void:
-	match current_tool:
-		PAINT:
-			_paint_tool()
-		BLUR:
-			_blur_tool()
-		FILL:
-			_fill_tool()
-		SAMPLE:
-			_sample_tool()
-		DISPLACE:
-			_displace_tool()
-
 func _display_brush() -> void:
-#	if raycast_hit:
+	if raycast_hit:
+		brush_cursor.visible = true
 		brush_cursor.translation = hit_position
 		brush_cursor.scale = Vector3.ONE * calculated_size
+	else:
+		brush_cursor.visible = false
 
 func _calculate_brush_pressure(event) -> void:
 	if event is InputEventMouseMotion:
@@ -155,13 +144,13 @@ func _paint_tool() -> void:
 					MIX:
 						data.set_vertex_color(i, data.get_vertex_color(i).linear_interpolate(paint_color, calculated_opacity * calculated_hardness))
 					ADD:
-						data.set_vertex_color(i, data.get_vertex_color(i).linear_interpolate(data.get_vertex_color(i) + paint_color, calculated_opacity))
+						data.set_vertex_color(i, data.get_vertex_color(i).linear_interpolate(data.get_vertex_color(i) + paint_color, calculated_opacity * calculated_hardness))
 					SUBTRACT:
-						data.set_vertex_color(i, data.get_vertex_color(i).linear_interpolate(data.get_vertex_color(i) - paint_color, calculated_opacity))
+						data.set_vertex_color(i, data.get_vertex_color(i).linear_interpolate(data.get_vertex_color(i) - paint_color, calculated_opacity * calculated_hardness))
 					MULTIPLY:
-						data.set_vertex_color(i, data.get_vertex_color(i).linear_interpolate(data.get_vertex_color(i) * paint_color, calculated_opacity))
+						data.set_vertex_color(i, data.get_vertex_color(i).linear_interpolate(data.get_vertex_color(i) * paint_color, calculated_opacity * calculated_hardness))
 					DIVIDE:
-						data.set_vertex_color(i, data.get_vertex_color(i).linear_interpolate(data.get_vertex_color(i) / paint_color, calculated_opacity))
+						data.set_vertex_color(i, data.get_vertex_color(i).linear_interpolate(data.get_vertex_color(i) / paint_color, calculated_opacity * calculated_hardness))
 
 		current_mesh.mesh.surface_remove(0)
 		data.commit_to_surface(current_mesh.mesh)

addons/vpainter/vpainter_ui.gd

@@ -168,8 +168,7 @@ func _set_size_pressure(value):
 
 func _set_paint_tool(value):
 	if value:
-		print("PAINT TOOL ACTICATED")
-		vpainter.current_tool = vpainter.PAINT
+		vpainter.current_tool = "_paint_tool"
 		pen_pressure_settings.visible = true
 		blend_modes.visible = true
 
@@ -181,8 +180,7 @@ func _set_paint_tool(value):
 
 func _set_sample_tool(value):
 	if value:
-		print("SAMPLE TOOL ACTICATED")
-		vpainter.current_tool = vpainter.SAMPLE
+		vpainter.current_tool = "_sample_tool"
 		pen_pressure_settings.visible = false
 		blend_modes.visible = false
 
@@ -194,8 +192,7 @@ func _set_sample_tool(value):
 
 func _set_blur_tool(value):
 	if value:
-		print("BLUR TOOL ACTICATED")
-		vpainter.current_tool = vpainter.BLUR
+		vpainter.current_tool = "_blur_tool"
 		pen_pressure_settings.visible = false
 		blend_modes.visible = false
 
@@ -207,8 +204,7 @@ func _set_blur_tool(value):
 
 func _set_displace_tool(value):
 	if value:
-		print("DISPLACE TOOL ACTICATED")
-		vpainter.current_tool = vpainter.DISPLACE
+		vpainter.current_tool = "_displace_tool"
 		pen_pressure_settings.visible = true
 		blend_modes.visible = false
 
@@ -221,8 +217,7 @@ func _set_displace_tool(value):
 
 func _set_fill_tool(value):
 	if value:
-		print("FILL TOOL ACTICATED")
-		vpainter.current_tool = vpainter.FILL
+		vpainter.current_tool = "_fill_tool"
 		pen_pressure_settings.visible = false
 		blend_modes.visible = true