export default /* glsl */ `
#ifdef SOFT_PARTICLES

    /* #ifdef LOGDEPTH
    float distSample = linearize_depth_log(sampleDepth, near, far);
    #else
    float distSample = ortho ? linearize_depth_ortho(sampleDepth, near, far) : linearize_depth(sampleDepth, near, far);
    #endif */

    vec2 p2 = projPosition.xy / projPosition.w;
    
    p2 = 0.5 * p2 + 0.5;

    float readDepth = texture2D(depthTexture, p2.xy).r;
    float viewDepth = linearize_depth(readDepth);

    float softParticlesFade = saturate(SOFT_INV_FADE_DISTANCE * ((viewDepth - SOFT_NEAR_FADE) - linearDepth));
    
    gl_FragColor *= softParticlesFade;

    //gl_FragColor = vec4(softParticlesFade , 0, 0, 1);
#endif
`;