To change the radius of a drawn ellipse in p5.js, you can specify the horizontal and vertical radius of the ellipse when using the ellipse() function. The first two parameters of the ellipse() function represent the x and y coordinates of the center of the ellipse, while the third and fourth parameters represent the horizontal and vertical radii of the ellipse. By adjusting the values of these parameters, you can change the size of the ellipse by changing the radius along the x-axis and y-axis.

## How to change the radius of a drawn ellipse in p5.js?

In p5.js, you can change the radius of a drawn ellipse by adjusting the values of the `ellipse()`

function parameters. The `ellipse()`

function requires four parameters: the x-coordinate of the center of the ellipse, the y-coordinate of the center of the ellipse, the width of the ellipse, and the height of the ellipse.

To change the radius of the ellipse, you can change the width and height parameters of the `ellipse()`

function. For example, to make the ellipse wider, you can increase the width parameter, and to make it taller, you can increase the height parameter.

Here's an example of how to draw an ellipse with a radius of 50 pixels:

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function setup() { createCanvas(400, 400); } function draw() { background(220); // Draw an ellipse with a radius of 50 pixels ellipse(200, 200, 100, 100); } |

In this example, the `ellipse()`

function draws an ellipse with a center at (200, 200) and a width and height of 100 pixels, resulting in an ellipse with a radius of 50 pixels. You can adjust the width and height parameters to change the radius of the ellipse.

## How can I dynamically change the radius of an ellipse based on mouse position in p5.js?

You can achieve this by updating the `ellipse`

function parameters inside the `draw`

function based on the mouse position. Here is an example code snippet that demonstrates how to dynamically change the radius of an ellipse based on the mouse position in p5.js:

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function setup() { createCanvas(400, 400); } function draw() { background(220); // Calculate the distance between the mouse position and the center of the canvas let distance = dist(mouseX, mouseY, width / 2, height / 2); // Map the distance to a radius value let radius = map(distance, 0, width / 2, 0, 200); // Draw the ellipse with the dynamically changing radius ellipse(width / 2, height / 2, radius * 2, radius * 2); } |

In this code, the `dist`

function is used to calculate the distance between the mouse position and the center of the canvas. The `map`

function is then used to map this distance to a radius value that changes based on the mouse position. Finally, the `ellipse`

function is called with the dynamically changing radius to draw the ellipse on the canvas.

## What is the method to adjust the size of an ellipse separately in p5.js?

To adjust the size of an ellipse separately in p5.js, you can use the `ellipse()`

function and specify different values for the width and height parameters. Here's an example code snippet that demonstrates how to adjust the size of an ellipse separately:

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function setup() { createCanvas(400, 400); } function draw() { background(220); // Draw an ellipse with a width of 100 and a height of 50 ellipse(200, 200, 100, 50); // Draw another ellipse with a width of 50 and a height of 100 ellipse(200, 300, 50, 100); } |

In this example, the `ellipse()`

function is used to draw two ellipses at different locations on the canvas with different width and height values. You can adjust the size of the ellipses by changing the values passed to the `ellipse()`

function for the width and height parameters.

## How do I set the radius of an ellipse in p5.js?

In p5.js, you can create an ellipse using the `ellipse()`

function and specify the radius by passing the desired width and height as parameters. The width parameter will correspond to the radius in the horizontal direction, while the height parameter will correspond to the radius in the vertical direction.

Here is an example code snippet that demonstrates how to create an ellipse with a specific radius:

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function setup() { createCanvas(400, 400); let radiusX = 100; // radius in the horizontal direction let radiusY = 50; // radius in the vertical direction ellipse(width/2, height/2, radiusX * 2, radiusY * 2); } |

In the above example, the `ellipse()`

function is called with the center coordinates at `width/2, height/2`

and the width and height parameters set to `radiusX * 2`

and `radiusY * 2`

, respectively.

You can adjust the `radiusX`

and `radiusY`

variables to set the desired radius of the ellipse.

## What is the process for resizing an ellipse in p5.js?

To resize an ellipse in p5.js, you can use the `ellipse()`

function with parameters for the ellipse's x and y position, as well as its width and height. Here is an example of how to create and resize an ellipse in p5.js:

- Set up a canvas in your sketch using the createCanvas() function.
- Use the ellipse() function to draw an ellipse with parameters for the x and y position, as well as the width and height of the ellipse.
- To resize the ellipse, update the width and height parameters of the ellipse() function based on your desired size.

Here is an example of how to create and resize an ellipse in p5.js:

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function setup() { createCanvas(400, 400); } function draw() { background(220); // Draw an ellipse at position (200, 200) with width and height of 50 ellipse(200, 200, 50, 50); // Resize the ellipse to have a width and height of 100 ellipse(200, 200, 100, 100); } |

In this example, the first `ellipse()`

function draws an ellipse with a width and height of 50 at position (200, 200). The second `ellipse()`

function resizes the ellipse to have a width and height of 100.