``In three.js, is there a trick to perfectly translateZ on camera when capturing footage

Question

``In three.js, is there a trick to perfectly translateZ on camera when capturing footage

My current use of the translateZ function allows the camera to move forward or backward along its lookat direction. However, because translateZ moves it relatively, performing camera.translateZ(10); and then another camera.translateZ(10); will result in a total movement of 20 units for the camera. This limitation prevents me from using it in a tween animation where I need to interpolate values within that function.

As a solution, I am looking for a way to translate along the Z-axis in absolute coordinates. For instance, even when focusing on an object at the origin, I would like to set a specific distance_from_origin while still keeping the lookat direction intact.

camera.absTranslateZ(distance_from_origin);

javascript three.js

Answer 1

Answer №1

My camera rigs all utilize a similar setup. I only rely on two variables: the focus position (vec3) and the z-distance. Every frame, I reset the position accordingly:

var focusPos = new THREE.Vector3();
var zDist = 10;

// Executed once per frame
update() {
    // Revert camera position to focusPos
    camera.position.copy(focusPos);

    // Adjust camera rotations if necessary
    // camera.rotation.set(rotX, rotY, 0);

    // Implement z-translation for dolly in/out effect
    camera.translateZ(zDist);
}

This method appeals to me because it allows for easy adjustments and even smooth transitions of the focus position, avoiding constantly looking at the origin. However, the success of this technique hinges on how you calculate your camera rotations; more intricate rotations may lead to gimbal lock issues.

Answer 2

My camera rigs all utilize a similar setup. I only rely on two variables: the focus position (vec3) and the z-distance. Every frame, I reset the position accordingly:

var focusPos = new THREE.Vector3();
var zDist = 10;

// Executed once per frame
update() {
    // Revert camera position to focusPos
    camera.position.copy(focusPos);

    // Adjust camera rotations if necessary
    // camera.rotation.set(rotX, rotY, 0);

    // Implement z-translation for dolly in/out effect
    camera.translateZ(zDist);
}

This method appeals to me because it allows for easy adjustments and even smooth transitions of the focus position, avoiding constantly looking at the origin. However, the success of this technique hinges on how you calculate your camera rotations; more intricate rotations may lead to gimbal lock issues.

``In three.js, is there a trick to perfectly translateZ on camera when capturing footage

Answer №1

Similar questions

Javascript - eliminate elements that are either children or parents from an array

Graph your data with a stunning Fusioncharts area range graph combined with a sleek

Incorporating TWEEN for camera position animations: A complete guide

How can we set up Node JS to automatically trigger events when a specific future date and time from the database is reached?

Arrange the array of items according to the order specified in a separate array

Creating HTML using JavaScript

What is Causing The Card to Not Expand?

Using React and TypeScript to enable file uploads

How to emphasize a portion of an expression in AngularJS using bold formatting

notify a designated channel when ready for launch

Trigger a ModalPopupExtender within an UpdatePanel with the use of JavaScript

Swapping out an entire item in a designated array index for a different object

Guide on implementing the onSignInChanged event handler in a Chrome extension for Gmail

jquery sliding down effect - glide gracefully with the slide down

Tips for triggering a method when clicking instead of using v-for in Vue.js

What is the process for redirecting an API response to Next.js 13?

Using the Python-requests module, we can send a POST request with two "values" to scrape and renew a website

Issue with the iteration process while utilizing Async.waterfall in a for-loop

Leveraging Jquery to retrieve multiple values for dynamic updating in HTML

What could be causing Loudev jQuery multiselect to generate duplicates?