# phaser place on ellipse

## Phaser Place on Ellipse

If you are trying to place your Phaser game object on an elliptical path, then you may want to consider using the following formula:

```
x = centerX + Math.cos(angle) * a;
y = centerY + Math.sin(angle) * b;
```

### Explanation:

`centerX`

and`centerY`

represent the center of your ellipse.`a`

and`b`

represent the length of the semi-major and semi-minor axis of your ellipse respectively.`angle`

represents the angle at which you want to place your object on the ellipse.- The
`Math.cos`

and`Math.sin`

functions are used to calculate the x and y coordinates of your object respectively.

### Example:

Suppose you want to place an image of a spaceship on an elliptical path centered at (300, 300) with a semi-major axis of 200 and a semi-minor axis of 150. To make the spaceship move along the elliptical path, you will need to update its position inside the game loop.

```
// define initial angle
let angle = 0;
function update() {
// update angle
angle += 0.01;
// calculate new position
let x = 300 + Math.cos(angle) * 200;
let y = 300 + Math.sin(angle) * 150;
// set new position
spaceship.x = x;
spaceship.y = y;
}
```

This code will make the spaceship move along the elliptical path with a constant angular velocity of 0.01 radians per frame.