Fixes for issue #4 and #5

addons/vizpath/resources/viz_head.gd

@@ -24,6 +24,23 @@ class_name VizHead
 		length_factor = l
 		emit_changed()
 
+## The get_offset function will be called to shift the end of the last 
+## segment to accomodate the head mesh
+##
+## This class can be overridden to provide a custom head to the path
+## by defining a resource that has an apply method with the following
+## definition:
+##
+## The [code]left[/code] and [code]right[/code] positions at the end of the path, where the 
+## V texture coordinate is 0.0 for [code]left[/code] and 1.0 for [code]right[/code].  
+## The [code]normal[/code] and the [code]direction[/code] define the position of the face and the 
+## direction that the path is going.
+func get_offset(left : Vector3, right : Vector3, normal : Vector3, direction : Vector3) -> float:
+	var segment := right - left
+	var segment_len := segment.length()
+	var arrow_point_len := segment_len * length_factor
+	return arrow_point_len
+
 ## The apply function will be called when the path 
 ## mesh is created.
 ##

addons/vizpath/resources/viz_tail.gd

@@ -16,6 +16,20 @@ class_name VizTail
 		num_segs = s
 		emit_changed()
 
+## The get_offset function will be called to shift the beginning of the first
+## segment to accomodate the tail mesh
+##
+## This class can be overridden to provide a custom head to the path
+## by defining a resource that has an apply method with the following
+## definition:
+##
+## The [code]left[/code] and [code]right[/code] positions at the start of the path, where the 
+## V texture coordinate is 0.0 for [code]left[/code] and 1.0 for [code]right[/code].  
+## The [code]normal[/code] and the [code]direction[/code] define the position of the face and the 
+## direction that the path is going.
+func get_offset(left : Vector3, right : Vector3, normal : Vector3, direction : Vector3) -> float:
+	return 0.0
+
 ## The apply function will be called when the path 
 ## mesh is created.
 ##

addons/vizpath/utilities/viz_simple_leg.gd

@@ -8,9 +8,6 @@ var _width : float
 var _bend_lip : float
 var _bend : VizBend
 
-var tri_mat : Material = load("res://example/common/materials/white.tres")
-var bend_mat : Material = load("res://example/common/materials/red.tres")
-
 const MIN_SEGMENT_LENGTH=0.01
 const EPSILON=0.00001
 

addons/vizpath/visualized_path.gd

@@ -107,6 +107,11 @@ signal changed_layout
 		path_tail.changed.connect(_rebuild)
 		_rebuild()
 
+@export var suppress_warnings := false :
+	set(s):
+		suppress_warnings = s
+		_rebuild()
+
 var _mesh_instance : MeshInstance3D
 var _errors : Array[String]
 
@@ -121,7 +126,9 @@ func _ready():
 	_rebuild()
 
 func _get_configuration_warnings():
-	return PackedStringArray(_errors)
+	if not suppress_warnings:
+		return PackedStringArray(_errors)
+	return PackedStringArray()
 
 func get_errors() -> Array[String]:
 	return _errors
@@ -149,15 +156,17 @@ func _rebuild():
 		if segments[idx-1].is_invalid():
 			_errors.push_back(segments[idx-1].get_error())
 			break
+		if idx == 1:
+			u = _add_tail(segments[idx-1], u)
 		u = segments[idx-1].update_mesh(_mesh_instance, u, bend_segs, bend_sharpness, path_mat)
 		u = midpoint.update_mesh(_mesh_instance, u, num_curve_segs, path_mat)
 	if _errors.size() == 0:
 		if segments[segments.size()-1].is_invalid():
 			_errors.push_back(segments[segments.size()-1].get_error())
 		else:
-			u = segments[segments.size()-1].update_mesh(_mesh_instance, u, bend_segs, bend_sharpness, path_mat)
+			if segments.size() == 1:
+				u = _add_tail(segments[0], u)
 			_add_head(segments[segments.size()-1], u)
-			_add_tail(segments[0], 0.0)
 	update_configuration_warnings()
 	changed_layout.emit()
 
@@ -169,14 +178,23 @@ func _add_head(head : VizSegment, u : float):
 		var right := end + binormal * path_width / 2.0
 		var normal := head.get_end().normal
 		var direction := head.get_end_ray()
-		path_head.apply(_mesh_instance, u, left, right, normal, direction, path_mat)
-
-func _add_tail(tail : VizSegment, u : float):
+		var offset := path_head.get_offset(left, right, normal, direction)
+		head.adjust_end(offset)
+		u = head.update_mesh(_mesh_instance, u, bend_segs, bend_sharpness, path_mat)
+		path_head.apply(_mesh_instance, u, left - direction * offset, right - direction * offset, normal, direction, path_mat)
+	else:
+		head.update_mesh(_mesh_instance, u, bend_segs, bend_sharpness, path_mat)
+
+func _add_tail(tail : VizSegment, u : float) -> float:
 	if path_tail != null:
 		var begin := tail.get_begin().point
 		var binormal := tail.get_begin_binormal()
 		var left := begin - binormal * path_width / 2.0
 		var right := begin + binormal * path_width / 2.0
 		var normal := tail.get_begin().normal
 		var direction := tail.get_begin_ray()
-		path_tail.apply(_mesh_instance, u, left, right, normal, direction, path_mat)
+		var offset := path_tail.get_offset(left, right, normal, direction)
+		tail.adjust_begin(offset)
+		path_tail.apply(_mesh_instance, u, left - direction * offset, right - direction * offset, normal, direction, path_mat)
+		return u + offset
+	return u

example/vizpath/two_bend/two_bend.tscn

@@ -3,8 +3,8 @@
 [ext_resource type="Script" path="res://addons/vizpath/visualized_path.gd" id="1_3gjiw"]
 [ext_resource type="Script" path="res://example/two_bend/two_bend.gd" id="1_avpar"]
 [ext_resource type="Script" path="res://addons/vizpath/resources/spot.gd" id="2_xhjfb"]
-[ext_resource type="Material" uid="uid://bb6vecpbvsco2" path="res://example/common/materials/green.tres" id="4_dnqvd"]
-[ext_resource type="Material" uid="uid://c4qytbc7juuoa" path="res://example/common/materials/move.tres" id="5_cr2c7"]
+[ext_resource type="Material" uid="uid://bb6vecpbvsco2" path="res://example/vizpath/common/materials/green.tres" id="4_dnqvd"]
+[ext_resource type="Material" uid="uid://c4qytbc7juuoa" path="res://example/vizpath/common/materials/move.tres" id="5_cr2c7"]
 
 [sub_resource type="Resource" id="Resource_m5l7s"]
 script = ExtResource("2_xhjfb")