Ik bone, whit example

[betotulkas]

change "batch_path 0" for th object for the thigh and batch_path18 for the shoe
add property lengthA what is the distance between thigh and knee
add property lengthB what is the distance between knee and shoe
for translation.y change return "vector3.x+aX"; by return vector3.y+aY;

Example:
ikwhitout CircleIntersec.zip

binding

aX = batch_path 0.transform.translation.x;
aY = batch_path 0.transform.translation.y;
bX = batch_path18.transform.translation.x;
bY = batch_path18.transform.translation.y;
value = $value;
varA = properties.lengthA;

calculate

var vA = new Vector2(aX,aY);
var vB = new Vector2(bX,bY);
var var0 = distancia2D(vA, vB);
var AI = angleTwoVertex2D(vA,vB);
var AB = teoremaDelCoseno(varA,varB,var0);
var MyAngle = AI - AB;
var vector3 = rotatePos(MyAngle,varB);
return vector3.x+aX;

definitions

var Vector2 = function(x, y) {
  this.x = x || 0;
  this.y = y || 0;
}
function rad2deg(radianes){
//radianes a grados sexagesimales 1 rad × 180/π = 57.296°
	return radianes * 57.296;
}
function Cos_degres(number){
	return Math.cos(deg2rad(number));
}
function Sin_degres(number){
	return Math.sin(deg2rad(number));
}
function deg2rad(number){
return number*(3.141593/180.00);
}
function matri2X2(aa,ab,ba,bb,var1,var2){
	return  new Vector2((aa*var1)+(ab*var2),(ba*var1)+(bb*var2));
}
function rotatePos(angle,pos_y){
	//0° y 360° son abajo
	var pos_x=0.00;
	return (matri2X2(Cos_degres(angle),(-1.00*(Sin_degres(angle))),Sin_degres(angle),Cos_degres(angle),pos_x,pos_y))}
function distancia2D(Vector_a,Vector_b){
	if (Vector_a.x-Vector_b.x==0){
		return Math.abs(Vector_a.y-Vector_b.y) ;
	}
	if (Vector_a.y-Vector_b.y==0){
		return Math.abs(Vector_a.x-Vector_b.x) ;
	}	
	return teoremaPitagoras_C(Math.abs(Vector_a.x-Vector_b.x),(Vector_a.y-Vector_b.y));
}
function teoremaPitagoras_C(a,b){
	return Math.sqrt (Math.pow(a,2.00)+Math.pow(b,2.00));
}
function teoremaDelCoseno(lado_a,lado_b,lado_c){
/* 	dado los tres lados, averiguar el angulo A (entre lado_b y lado_c)
	los numeros deben ser float o retornan "nan" si es int en division */
	var valor_1 = lado_a*lado_a;
	var valor_2 = lado_b*lado_b;
	var valor_3 = lado_c*lado_c;
	var valor_4 = valor_1-valor_2-valor_3;
	var valor_5 = -2.00*lado_b*lado_c;
	var valor_6 =  valor_4/valor_5;
	return rad2deg(Math.acos(valor_6));
}
function ArcoSeno_CO_HI(Vector2_a,Vector2_b){
	//Arcoseno, cateto opuesto sobre hipotenusa
	var cateto_adyacente =Vector2_a.y-Vector2_b.y   
	var cateto_opuesto = Vector2_a.x-Vector2_b.x
	var hipotenusa = teoremaPitagoras_C(cateto_adyacente,cateto_opuesto)
	return rad2deg(Math.asin(cateto_opuesto/hipotenusa))
}
function angleTwoVertex2D(Vector2_a,Vector2_b){
//devuelve el angulo entre 2 vectores, 0 y 360 es abajo	
	var cuadrante = ""
	if (Vector2_a.x > Vector2_b.x && Vector2_a.y > Vector2_b.y) {
	cuadrante = "A"}
	if (Vector2_a.x < Vector2_b.x && Vector2_a.y > Vector2_b.y){
		cuadrante = "B"
		}
	if (Vector2_a.x < Vector2_b.x && Vector2_a.y < Vector2_b.y) {
		cuadrante = "C"
		}
	if (Vector2_a.x > Vector2_b.x && Vector2_a.y < Vector2_b.y) {
		cuadrante = "D"
		}
	if( Vector2_a.x-Vector2_b.x== 0 || Vector2_a.y-Vector2_b.y==0){
		cuadrante = "E"
		}
	switch (cuadrante){
		case "A":
			return Math.abs(ArcoSeno_CO_HI(Vector2_a,Vector2_b)-90) +90;
			break;
		case "B":
			return Math.abs(ArcoSeno_CO_HI(Vector2_a,Vector2_b)) +180;
			break;
		case "C":
			return (ArcoSeno_CO_HI(Vector2_a,Vector2_b)-90) +450;
			break;
		case "D":
			return Math.abs(ArcoSeno_CO_HI(Vector2_a,Vector2_b)) ;
			break;
		case "E":
			return 0;
			break;
	}
	return ArcoSeno_CO_HI(Vector2_a,Vector2_b);
}