【Godot4.2】Vector2向量插值的应用

求线段的等分点

extends Node2D

var pos:Vector2
var split_num:int
var p1 = Vector2(200,200)
var p2 = Vector2(100,100)

func _input(event: InputEvent) -> void:
	if event is InputEventMouseButton:
		if event.button_index == MOUSE_BUTTON_WHEEL_DOWN:
			split_num = clamp(split_num-1,0,10)
		if event.button_index == MOUSE_BUTTON_WHEEL_UP:
			split_num = clamp(split_num+1,0,10)
		queue_redraw()


func _draw() -> void:
	myCanvas.draw_vector(self,p1,p2)
	var points = line_splits(p1,p2,split_num)
	for p in points:
		myCanvas.draw_point(self,p)
	pass

# 返回线段的等分点(不包含起始和终止点)
func line_splits(p1:Vector2,p2:Vector2,num:int=2) ->PackedVector2Array:
	var arr:PackedVector2Array
	for i in range(1,num):
		arr.append(p1.lerp(p2,float(i)/float(num)))
	return arr

求反向平行线段之间的对角线

extends Node2D

var pos:Vector2
var split_num:int


func _input(event: InputEvent) -> void:
	if event is InputEventMouseButton:
		if event.button_index == MOUSE_BUTTON_WHEEL_DOWN:
			split_num = clamp(split_num-1,0,10)
		if event.button_index == MOUSE_BUTTON_WHEEL_UP:
			split_num = clamp(split_num+1,0,10)
		queue_redraw()


func _draw() -> void:
	var p1 = Vector2(200,200)
	var p2 = Vector2(200,400)
	var p3 = Vector2(500,200)
	var p4 = Vector2(500,400)
	
	myCanvas.draw_vector(self,p1,p2)
	myCanvas.draw_vector(self,p4,p3)
	var points = line_lerps(p1,p2,10)
	var points2 = line_lerps(p4,p3,10)
	for i in range(points.size()):
		myCanvas.draw_vector(self,points[i],points2[i])

# 返回线段的等分点(包含起始和终止点)
func line_lerps(p1:Vector2,p2:Vector2,num:int=2) ->PackedVector2Array:
	var arr:PackedVector2Array
	for i in range(0,num+1):
		arr.append(p1.lerp(p2,float(i)/float(num)))
	return arr

extends Node2D

var pos:Vector2
var split_num:int


func _input(event: InputEvent) -> void:
	if event is InputEventMouseMotion:
		pos = event.position
		queue_redraw()


func _draw() -> void:
	var p1 = Vector2(100,200)
	var p2 = Vector2(200,500)
	var p3 = Vector2(100,100)
	var p4 = pos
	
	myCanvas.draw_vector(self,p1,p2)
	myCanvas.draw_vector(self,p3,p4)
	
	var points = line_lerps(p1,p2,10)
	var points2 = line_lerps(p3,p4,10)
	for i in range(points.size()):
		myCanvas.draw_vector(self,points[i],points2[i])
	
	var points3 = line_lerps(p2,p4,10)
	var points4 = line_lerps(p1,p3,10)
	for i in range(points3.size()):
		myCanvas.draw_vector(self,points3[i],points4[i])
	
	pass

# 返回线段的等分点(不包含起始和终止点)
func line_splits(p1:Vector2,p2:Vector2,num:int=2) ->PackedVector2Array:
	var arr:PackedVector2Array
	for i in range(1,num):
		arr.append(p1.lerp(p2,float(i)/float(num)))
	return arr

# 返回线段的等分点(包含起始和终止点)
func line_lerps(p1:Vector2,p2:Vector2,num:int=2) ->PackedVector2Array:
	var arr:PackedVector2Array
	for i in range(0,num+1):
		arr.append(p1.lerp(p2,float(i)/float(num)))
	return arr