@polygonjs/polygonjs/dist/src/core/render/renderPixel/DepthRead.js

node-based WebGL 3D engine https://polygonjs.com

"use strict";
import {
  OrthographicCamera,
  Scene,
  ShaderMaterial,
  PlaneGeometry,
  Mesh
} from "three";
import VERTEX from "./depthRead/DepthRead.vert.glsl";
import FRAGMENT from "./depthRead/DepthRead.frag.glsl";
export function setupDepthReadScene() {
  const camera = new OrthographicCamera(-1, 1, 1, -1, 0, 1);
  const material = new ShaderMaterial({
    vertexShader: VERTEX,
    fragmentShader: FRAGMENT,
    uniforms: {
      cameraNear: { value: camera.near },
      cameraFar: { value: camera.far },
      tDiffuse: { value: null },
      tDepth: { value: null }
    }
  });
  const postPlane = new PlaneGeometry(2, 2);
  const postQuad = new Mesh(postPlane, material);
  const scene = new Scene();
  scene.add(postQuad);
  return { scene, camera, material };
}
export function updateDepthSetup(setup, camera, renderTarget) {
  if (camera.isPerspectiveCamera || camera.isOrthographicCamera) {
    setup.material.uniforms.cameraNear.value = camera.near;
    setup.material.uniforms.cameraFar.value = camera.far;
    setup.material.uniforms.tDiffuse.value = renderTarget.texture;
    setup.material.uniforms.tDepth.value = renderTarget.depthTexture;
  } else {
    console.warn("camera is not a PerspectiveCamera or OrthographicCamera");
  }
}