curvePoint() / Reference / Processing.org

Name

curvePoint()

Description

Evaluates the curve at point t for points a, b, c, d. The parameter t may range from 0 (the start of the curve) and 1 (the end of the curve). a and d are the control points, and b and c are points on the curve. As seen in the example above, this can be used once with the x coordinates and a second time with the y coordinates to get the location of a curve at t.

Examples

```
size(400,400);

noFill();
curve(20, 104, 20, 104, 292, 96, 292, 244);
curve(20, 104, 292, 96, 292, 244, 60, 260);

fill(255);
ellipseMode(CENTER);
int steps = 6;
for (int i = 0; i <= steps; i++) {
  float t = i / float(steps);
  float x = curvePoint(20, 20, 292, 292, t);
  float y = curvePoint(104, 104, 96, 244, t);
  ellipse(x, y, 10, 10);
  x = curvePoint(20, 292, 292, 60, t);
  y = curvePoint(104, 96, 244, 260, t);
  ellipse(x, y, 10, 10);
}
```