merge branch 'curve-smoothing'

4 files changed, 121 insertions, 1 deletions

diff --git a/Assets/road.png b/Assets/road.png
new file mode 100644
index 0000000..5acc2e9
--- /dev/null
+++ b/Assets/road.png
diff --git a/Assets/road.png.import b/Assets/road.png.import
new file mode 100644
index 0000000..59a81a8
--- /dev/null
+++ b/Assets/road.png.import
@@ -0,0 +1,34 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://bcn7tgs6a4fm7"
+path="res://.godot/imported/road.png-c3c47e2cc8c90beae2ad5c8a3bb2c3ca.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://Assets/road.png"
+dest_files=["res://.godot/imported/road.png-c3c47e2cc8c90beae2ad5c8a3bb2c3ca.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1
diff --git a/Scripts/Road.gd b/Scripts/Road.gd
new file mode 100644
index 0000000..4b19c70
--- /dev/null
+++ b/Scripts/Road.gd
@@ -0,0 +1,82 @@
+extends Line2D
+
+var epsilon = 2
+
+@onready var leftBorder = $LeftBorder
+@onready var rightBorder = $RightBorder
+
+# Called when the node enters the scene tree for the first time.
+func _ready():
+	pass # Replace with function body.
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta):
+	pass
+
+func simplify():
+	points = simplify_rec(points, epsilon)
+
+func simplify_rec(pointArray: PackedVector2Array, epsilon: float):
+	var dmax = 0
+	var index = -1
+	if pointArray.size() < 3:
+		return pointArray
+	var end = pointArray.size() - 1
+	for i in range(1, end-1):
+		var d = find_perpendicular_distance(pointArray[i], pointArray[0], pointArray[end])
+		if d > dmax:
+			index = i
+			dmax = d
+	
+	if dmax > epsilon:
+		var recResults1 = simplify_rec(pointArray.slice(0, index), epsilon)
+		var recResults2 = simplify_rec(pointArray.slice(index, end), epsilon)
+		recResults1.append_array(recResults2)
+		return recResults1
+	else:
+		return [pointArray[0], pointArray[end]]
+
+func find_perpendicular_distance(p: Vector2, p1: Vector2, p2: Vector2):
+	var result
+	var slope
+	var intercept
+	if p1.x == p2.x:
+		result = p.x - p1.x
+	else:
+		slope = (p2.y - p1.y) / (p2.x - p1.x)
+		intercept = p1.y - (slope * p1.x)
+		result = abs(slope * p.x - p.y + intercept) / sqrt(pow(slope, 2) + 1)
+	
+	return result
+
+func get_bisector(left_side: bool, p2: Vector2, p1: Vector2 = p2, p3: Vector2 = p2):
+	var v1 = (p2 - p1).normalized()
+	var v2 = (p2 - p3).normalized()
+	var normal
+	if v1 == -v2:
+		normal = v2.rotated(-PI/2)
+	else:
+		normal = (v1 + v2).normalized()
+		if v2.rotated(-PI/2).dot(v1) < 0:
+			normal = -normal
+	
+	if left_side:
+		normal = -normal
+	return normal
+
+
+func draw_borders():
+	for pointIndex in range(0, points.size() - 1):
+		var normal
+		if pointIndex == 0:
+			continue
+		elif pointIndex == points.size() -1:
+			continue
+			#normal = Vector2.ZERO
+		else:
+			normal = get_bisector(true, points[pointIndex], points[pointIndex-1], points[pointIndex+1])
+		
+		var point = points[pointIndex] + (normal*50)
+		leftBorder.add_point(point)
+		point = points[pointIndex] - (normal*50)
+		rightBorder.add_point(point)
diff --git a/Scripts/drawing.gd b/Scripts/drawing.gd
index 832c42d..6b94f6e 100644
--- a/Scripts/drawing.gd
+++ b/Scripts/drawing.gd
@@ -2,7 +2,7 @@ extends Node
 
 var drawing = false
 
-@onready var line: Line2D = $TrackLine
+@onready var line = $Road
 @onready var path: Path2D = $TrackPath
 
 func _ready():
@@ -16,6 +16,10 @@ func start_drawing():
 
 func _end_drawing():
 	drawing = false
+	line.simplify()
+	line.draw_borders()
+	for point in line.points:
+		path.curve.add_point(point)
 	owner.set_driving(true)