STHREE

A Three.js component library project inspired by the svelte-cubed project, and other wonderful tools like React Three Fiber and react-three/drei

Getting Started

npm install sthree-js

Usage

import * as St from 'sthree-js';

Index Basic Features

Cameras PerspectiveCamera CubeCamera Controls OrbitControls Light DirectionalLight Loader useGLTF Objects Group Mesh Primitive Sprite Raycaster Raycaster

Index Advanced Features

Controls ScrollControls Enviroment Environment Portals View Post-Processing EffectComposer

Index Basic Features

Cameras

PerspectiveCamera

A standard THREE.PerspectiveCamera

<St.PerspectiveCamera/>

CubeCamera

A standard THREE.CubeCamera

export let envMap
$: chromeMaterial = new THREE.MeshLambertMaterial( { color: 0x555fff, envMap: envMap } );
<St.CubeCamera bind:envMap/>

Controls

OrbitControls

A standard OrbitControls

<St.OrbitControls/>

Light

DirectionalLight

A standard THREE.DirectionalLight

<St.DirectionalLight/>

Loader

useGLTF

useGLTF an easy way to async load 3d models in gltf format

import {useGltf} from 'sthree-js';
onMount(async() => {
     gltf = await useGltf ('/models/gltf/Fox.glb');
     model = gltf.scene;     
     <St.Primitive object={model} scale ={1} on:mouseover ={play} isInterative={true} />
});

Objects.

Group

A standard THREE.Group

<St.Group bind:group={group1}  position = {[0,0,0]} id={'view4'} >
        <St.Sprite id= {'view4'} isInterative = {true} on:click={exemplo} position = {[0,0,5]} group= {group1} />
        <St.Mesh isInterative = {true} on:click={exemplo} group={group1} id= {'view4'} geometry = {myBox}  position = {[1,1,0]} scale ={3}  material ={chromeMaterial}/>
        <St.Mesh isInterative = {true} on:click={exemplo} group={group1} id= {'view4'} geometry = {myBox}  position = {[-1,-1,0]} scale ={1} material ={chromeMaterial}/>
        <St.DirectionalLight id={'view4'} />
</St.Group>

Mesh

A standard THREE.Mesh

let Sphere = new THREE.SphereGeometry();
<St.Mesh geometry = {Sphere}  scale ={1} isInterative = {true} material ={material} />

Primitive

an easy way to place objects, cameras, light, etc.

<St.Primitive object={model} scale ={1} on:mouseover ={play} isInterative={true} />
Sprite

Sprite

sprite is a plane that always faces towards the camera

<St.Sprite isInterative = {true} on:click={exemplo} position = {[1,0,-30]}/>

Raycaster

Raycaster

A standard THREE.Raycaster to activate the raycaster sister, simply activate it on the objects: isInterative = {true} and on:eventname

<St.Primitive object={model} scale ={.3} on:mouseover ={play} isInterative={true} />

Index Advanced Features

Controls

ScrollControls

ScrollControls allow you to make scroll effects. it works with a container in front of the threejs screen. everything inside < ScrollControls > will be affected, including HTML components.

 <St.Canvas>    
        <St.ScrollControls> 
            <div>
                <button class="class" on:click={()=> press()} > button </button>
            </div>
            <St.PerspectiveCamera/>
            <St.Mesh geometry = {myBox}  scale ={.5} isInterative = {true} material ={chromeMaterial}/>
            <St.DirectionalLight/>
        </St.ScrollControls>
    </St.Canvas>    
    

it is possible to access scroll data through the ScrollProps store, the current scroll, and range functions: range, curve and visible

 import { ScrollProps } from 'sthree-js';
 $: if ($ScrollProps) {
        r1 = $ScrollProps.range(0/4, 1/4);
 }

Enviroment

Enviroment

Enviroment allows you to easily include an environment map or an equirectangular Texture such as a CubeTexture in the 3d scene, in addition to providing an integrated access to a CubeCamera that returns a texture already mapped from the current camera to be applied to your materials

<St.Environment files={'royal_esplanade_1k.hdr'} path ={'textures/equirectangular/'} bind:envMap />

for convenience is available by default: a selection of HDRI Haven presets.

<St.Environment preset={sunset} />

The option to activate a GroundProjectedEnv is also available

<St.Environment ground={true} />

Portal

View

Used to cut the viewport into segments, each segment has its own div, allowing you to have multiple views with a single screen. This resource uses the setScissor method to cut the screen into multiple views.

<St.Canvas frameloop = {'always'}>
  <St.View isInterative = {true} id={'view1'} top ={'0%'} left ={'0%'} position={'relative'} > 
    <St.Mesh isInterative = {true} on:click={exemplo} group={group} id= {'view1'} geometry = {myBox}  position = {[1,1,0]} scale ={3}  material ={chromeMaterial}/>
    <St.Mesh isInterative = {true} on:click={exemplo} group={group} id= {'view1'} geometry = {myBox}  position = {[-1,-1,0]} scale ={1} material ={chromeMaterial}/>
  </St.View> 
    
  <St.View isInterative = {true} id={'view2'} top ={'50%'} left ={'0%'} position={'relative'} > 
    <St.PerspectiveCamera id= {'view2'}/>   
      <St.Mesh isInterative = {true} on:click={exemplo} group={group} id= {'view2'} geometry = {myBox}  position = {[1,1,0]} scale ={3}  material ={chromeMaterial}/>
  </St.View> 
 </St.Canvas>

Post-Processing

EffectComposer

Using a sequence of passes applies the post-processing effect They are executed in the order they were added in the pass matrix. The last pass is an automatic process that renders the screen.

first add all your passes in an array:

import { GammaCorrectionShader } from 'three/examples/jsm/shaders/GammaCorrectionShader.js';
let pass : Pass [] = []; 
pass[0]= new ShaderPass( GammaCorrectionShader );

transfer this array to EffectComposer:

<St.EffectComposer addPass={pass} >
  <St.Mesh isInterative = {true} on:click={exemplo} group={group} geometry = {myBox}  position = {[-1,-1,0]} scale ={1} material ={chromeMaterial}/>
  <St.DirectionalLight  />
  <St.OrbitControls/>
</St.EffectComposer> 

development

This is a study project and still under development can expect errors