Adjust the A-frame's jumping height by assigning it to a variable

Question

Adjust the A-frame's jumping height by assigning it to a variable

I'm currently working on developing a video game using Aframe, and I have a question regarding setting my jump height as a variable within the code. This is what I have so far:

<a-entity id="rig"
            position="17.5 50.1 0" 
            movement-controls="speed: 0.2;"
            kinematic-body="enableJumps: true;"
            jump-ability="distance: 1.8;"
         
                networked="template:#avatar-template;attachTemplateToLocal:false;"
                spawn-in-circle="radius:3"
            tracker>
    <a-entity camera="far: 1000;"
              wasd-controls
              look-controls="pointerLockEnabled: true;"
              position="0 1.6 0">
        
    </a-entity>
  </a-entity>

My goal is to assign the jump-ability attribute to be equal to a variable. For instance,

jump-ability="distance: VARIABLE;"

. Does anyone have any suggestions on how I can accomplish this?

javascript html css aframe virtual-reality

Answer 1

Answer №1

When working without any framework such as angular or react, the use of JavaScript variables within HTML elements is not possible. However, external JavaScript scripts can be used to modify properties by utilizing setAttribute():

// Implementing logic in a JS script
const btn = document.querySelector("button");
const sphere = document.querySelector("a-sphere");
btn.addEventListener("click", e => {
  // Setting the radius to a random number
  sphere.setAttribute("radius", Math.random() * 1 + 0.5);
})

<script src="https://aframe.io/releases/1.2.0/aframe.min.js"></script>
<button style="z-index: 999; position: fixed">RESIZE</button>
<script>
  // Alternatively, use a custom component
  AFRAME.registerComponent("foo", {
    init: function() {
      const btn = document.querySelector("button");
      const sphere = document.querySelector("a-sphere");
      btn.addEventListener("click", e => {
        // Avoid duplicating the script logic
        // sphere.setAttribute("radius", Math.random() * 1 + 0.5);
      })
    }
  })
</script>
<a-scene foo>
  <a-sphere position="0 1.25 -5" radius="1.25" color="#EF2D5E"></a-sphere>
</a-scene>

This setup allows for the radius value to change each time the button is clicked.

Answer 2

When working without any framework such as angular or react, the use of JavaScript variables within HTML elements is not possible. However, external JavaScript scripts can be used to modify properties by utilizing setAttribute():

// Implementing logic in a JS script
const btn = document.querySelector("button");
const sphere = document.querySelector("a-sphere");
btn.addEventListener("click", e => {
  // Setting the radius to a random number
  sphere.setAttribute("radius", Math.random() * 1 + 0.5);
})

<script src="https://aframe.io/releases/1.2.0/aframe.min.js"></script>
<button style="z-index: 999; position: fixed">RESIZE</button>
<script>
  // Alternatively, use a custom component
  AFRAME.registerComponent("foo", {
    init: function() {
      const btn = document.querySelector("button");
      const sphere = document.querySelector("a-sphere");
      btn.addEventListener("click", e => {
        // Avoid duplicating the script logic
        // sphere.setAttribute("radius", Math.random() * 1 + 0.5);
      })
    }
  })
</script>
<a-scene foo>
  <a-sphere position="0 1.25 -5" radius="1.25" color="#EF2D5E"></a-sphere>
</a-scene>

This setup allows for the radius value to change each time the button is clicked.

Answer 3

Answer №2

Correcting the issues in your code

Your code contains errors that prevent it from working properly.

This is the section of your code causing the problems:

AFRAME.registerComponent("foo", {
  init: function() {
    var acceleration = 100;
    const cam = this.el.sceneEl.camera.el;
    const btn = document.querySelector("button");
    btn.addEventListener("click", e => {
      acceleration = acceleration === 100 ? 25 : 100;
      cam.setAttribute("speed", "mouvement-controls", acceleration);
    })
  }
})

You have a typo in mouvement-controls, it should be movement-controls
The order of arguments in the setAttribute method is incorrect. It should be like this:
```
movement-controls="speed: {acceleration}"
```
instead of
```
speed="mouvement-controls: {acceleration}"
```
. Change the order of arguments
Make sure to set the movement-controls on your rig, not the camera
Note: setting speed to 100 will make you move at light speed as speed 1 is similar to acceleration 65

Here is a corrected version of your component:

AFRAME.registerComponent("foo", {
  init: function() {
    var acceleration = 1;
    const rig = document.getElementById("rig");
    const btn = document.querySelector("button");
    btn.addEventListener("click", e => {
      acceleration = acceleration === 1 ? 0.1 : 1;
      rig.setAttribute("movement-controls", "speed", acceleration);
    })
  }
})

Answer 4

Correcting the issues in your code

Your code contains errors that prevent it from working properly.

This is the section of your code causing the problems:

AFRAME.registerComponent("foo", {
  init: function() {
    var acceleration = 100;
    const cam = this.el.sceneEl.camera.el;
    const btn = document.querySelector("button");
    btn.addEventListener("click", e => {
      acceleration = acceleration === 100 ? 25 : 100;
      cam.setAttribute("speed", "mouvement-controls", acceleration);
    })
  }
})

You have a typo in mouvement-controls, it should be movement-controls
The order of arguments in the setAttribute method is incorrect. It should be like this:
```
movement-controls="speed: {acceleration}"
```
instead of
```
speed="mouvement-controls: {acceleration}"
```
. Change the order of arguments
Make sure to set the movement-controls on your rig, not the camera
Note: setting speed to 100 will make you move at light speed as speed 1 is similar to acceleration 65

Here is a corrected version of your component:

AFRAME.registerComponent("foo", {
  init: function() {
    var acceleration = 1;
    const rig = document.getElementById("rig");
    const btn = document.querySelector("button");
    btn.addEventListener("click", e => {
      acceleration = acceleration === 1 ? 0.1 : 1;
      rig.setAttribute("movement-controls", "speed", acceleration);
    })
  }
})

Adjust the A-frame's jumping height by assigning it to a variable

Answer №1

Answer №2

Correcting the issues in your code

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