NgtpChromaticAberration

Preview

canvas.ts

import { ChangeDetectionStrategy, Component } from '@angular/core';
import { PostprocessingWrapper } from '@postprocessing/wrapper.ts';
import { NgtCanvas, provideNgtRenderer } from 'angular-three/dom';
import { SceneGraph } from './scene-graph';

@Component({
    selector: 'app-chromatic-aberration',
    template: `
        <ngt-canvas [camera]="{ position: [0, 0, 5], fov: 50 }">
            <app-postprocessing-wrapper *canvasContent [lights]="true">
                <app-scene-graph />
            </app-postprocessing-wrapper>
        </ngt-canvas>
    `,
    changeDetection: ChangeDetectionStrategy.OnPush,
    host: { class: 'chromatic-aberration-demo relative block h-full' },
    imports: [NgtCanvas, PostprocessingWrapper, SceneGraph],
})
export default class ChromaticAberration {
    static clientProviders = [provideNgtRenderer()];
}

scene-graph.ts

import { ChangeDetectionStrategy, Component, CUSTOM_ELEMENTS_SCHEMA, ElementRef, viewChild } from '@angular/core';
import { beforeRender, NgtArgs } from 'angular-three';
import { NgtpChromaticAberration, NgtpEffectComposer } from 'angular-three-postprocessing';
import * as THREE from 'three';

@Component({
    selector: 'app-scene-graph',
    template: `
        <ngt-mesh #mesh>
            <ngt-torus-knot-geometry *args="[1, 0.35, 128, 32]" />
            <ngt-mesh-standard-material color="white" [metalness]="0.5" [roughness]="0.2" />
        </ngt-mesh>

        <ngtp-effect-composer>
            <ngtp-chromatic-aberration
                [options]="{
                    offset: [0.006, 0.006],
                    radialModulation: true,
                    modulationOffset: 0.5,
                }"
            />
        </ngtp-effect-composer>
    `,
    schemas: [CUSTOM_ELEMENTS_SCHEMA],
    changeDetection: ChangeDetectionStrategy.OnPush,
    imports: [NgtArgs, NgtpEffectComposer, NgtpChromaticAberration],
})
export class SceneGraph {
    private meshRef = viewChild.required<ElementRef<THREE.Mesh>>('mesh');

    constructor() {
        beforeRender(({ delta }) => {
            const mesh = this.meshRef().nativeElement;
            mesh.rotation.x += delta * 0.3;
            mesh.rotation.y += delta * 0.4;
        });
    }
}

Chromatic aberration simulates the color fringing that occurs in real camera lenses, where different wavelengths of light are focused at slightly different points.

Usage

import { NgtpEffectComposer, NgtpChromaticAberration } from 'angular-three-postprocessing';

@Component({
  template: `
    <ngtp-effect-composer>
      <ngtp-chromatic-aberration [options]="{ offset: [0.002, 0.002] }" />
    </ngtp-effect-composer>
  `,
  imports: [NgtpEffectComposer, NgtpChromaticAberration],
})
export class SceneGraph {}

Options

Property	Type	Default	Description
offset	[number, number]	[0.001, 0.001]	Color channel offset (x, y)
radialModulation	boolean	false	Apply radial modulation
modulationOffset	number	0.15	Modulation offset

Example: Subtle Effect

<ngtp-effect-composer>
  <ngtp-chromatic-aberration [options]="{
    offset: [0.001, 0.001],
    radialModulation: true,
    modulationOffset: 0.5
  }" />
</ngtp-effect-composer>