const customShader = new Cesium.CustomShader({ lightingModel: Cesium.LightingModel.UNLIT, uniforms: { u_cameraDirectionWC: { type: Cesium.UniformType.VEC3, value: WE.viewer.scene.camera.positionWC, }, u_lightColor1: { type: Cesium.UniformType.VEC4, value: lightPoint1.color, }, u_lightPos1: { type: Cesium.UniformType.VEC3, value: lightPoint1.postion, }, u_lightColor2: { type: Cesium.UniformType.VEC4, value: lightPoint2.color, }, u_lightPos2: { type: Cesium.UniformType.VEC3, value: lightPoint2.postion, }, u_lightColor3: { type: Cesium.UniformType.VEC4, value: lightPoint3.color, }, u_lightPos3: { type: Cesium.UniformType.VEC3, value: lightPoint3.postion, }, }, fragmentShaderText: ` vec4 makeLight(vec4 lightColorHdr,vec3 lightPos, vec3 positionWC,vec3 positionEC,vec3 normalEC,czm_pbrParameters pbrParameters) { vec3 color = vec3(0.0); float mx1 = 1.0; vec3 light1Dir = positionWC - lightPos; float distance1 = length(light1Dir); if(distance1 < 1000.0){ vec4 l1 = czm_view * vec4(lightPos, 1.0); vec3 lightDirectionEC = l1.xyz - positionEC; mx1 = 1.0 - distance1 / 1000.0; color = czm_pbrLighting( positionEC, normalEC, lightDirectionEC, lightColorHdr.xyz, pbrParameters ).xyz; } mx1 = max(color.r,max(color.g,color.b)) * pow(mx1,1.0) * 10.0; return vec4(color,mx1); } void fragmentMain(FragmentInput fsInput, inout czm_modelMaterial material) { material.diffuse = vec3(1.0); vec3 positionWC = fsInput.attributes.positionWC; vec3 normalEC = fsInput.attributes.normalEC; vec3 positionEC = fsInput.attributes.positionEC; vec3 lightColorHdr = czm_lightColorHdr; vec3 lightDirectionEC = czm_lightDirectionEC; lightDirectionEC = (czm_view * vec4(u_cameraDirectionWC,1.0)).xyz - positionEC; czm_pbrParameters pbrParameters; pbrParameters.diffuseColor = material.diffuse; pbrParameters.f0 = vec3(0.5); pbrParameters.roughness = 1.0; vec3 ligth1Color0 = czm_pbrLighting( positionEC, normalEC, lightDirectionEC, lightColorHdr, pbrParameters ); vec4 ligth1ColorR = makeLight(u_lightColor1,u_lightPos1,positionWC,positionEC,normalEC,pbrParameters); vec4 ligth1ColorG = makeLight(u_lightColor2,u_lightPos2,positionWC,positionEC,normalEC,pbrParameters); vec4 ligth1ColorB = makeLight(u_lightColor3,u_lightPos3,positionWC,positionEC,normalEC,pbrParameters); vec3 finalColor = mix(ligth1Color0.rgb, ligth1ColorR.rgb, ligth1ColorR.a); finalColor = mix(finalColor, ligth1ColorG.rgb, ligth1ColorG.a); finalColor = mix(finalColor, ligth1ColorB.rgb, ligth1ColorB.a); material.diffuse = finalColor; } `, });

Cesium建筑自定义光源效果

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const customShader = new Cesium.CustomShader({
    lightingModel: Cesium.LightingModel.UNLIT,
    uniforms: {
      u_cameraDirectionWC: {
        type: Cesium.UniformType.VEC3,
        value: WE.viewer.scene.camera.positionWC,
      },
      u_lightColor1: {
        type: Cesium.UniformType.VEC4,
        value: lightPoint1.color,
      },
      u_lightPos1: {
        type: Cesium.UniformType.VEC3,
        value: lightPoint1.postion,
      },
      u_lightColor2: {
        type: Cesium.UniformType.VEC4,
        value: lightPoint2.color,
      },
      u_lightPos2: {
        type: Cesium.UniformType.VEC3,
        value: lightPoint2.postion,
      },
      u_lightColor3: {
        type: Cesium.UniformType.VEC4,
        value: lightPoint3.color,
      },
      u_lightPos3: {
        type: Cesium.UniformType.VEC3,
        value: lightPoint3.postion,
      },
    },
    fragment

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