# Curve that passes through three points

how to draw a curve according to three given points?

for example
`curve (10,10, 20,50, 80,75)`

this function would draw a curve that passes through those 3 coordinates

try curveVertex

`````` beginShape();
curveVertex(x1,y1); // or define x0,y0
curveVertex(x1,y1);
curveVertex(x2,y2);
curveVertex(x3,y3);
curveVertex(x3,y3); // or define x4,y4
endShape();
``````

used like in

``````float r = 5.0;

void setup() {
size(400, 400);
}

void draw() {
background(200,100,0);
stroke(0,200,200); fill(0,200,200);
float x0 =  50;  float y0 = 250; ellipse(x0,y0,r,r);
float x1 =  50;  float y1 = 250; ellipse(x1,y1,r,r);
float x2 = 150;  float y2 = 150; ellipse(x2,y2,r,r);
float x3 = 250;  float y3 = 250; ellipse(x3,y3,r,r);
float x4 = 250;  float y4 = 250; ellipse(x4,y4,r,r);

my_3_point_curve(x1,y1,x2,y2,x3,y3);
}

void my_3_point_curve(float x1,float y1,float x2,float y2,float x3,float y3) {
stroke(200,200,0); noFill();
beginShape();
curveVertex(x1,y1); //  curveVertex(x0,y0);
curveVertex(x1,y1);
curveVertex(x2,y2);
curveVertex(x3,y3);
curveVertex(x3,y3); //  curveVertex(x4,y4);
endShape();

}
``````

play with the P4 for understanding here