From e1743644f25aede2d8fb79c5839c530542ccae4b Mon Sep 17 00:00:00 2001
From: ctwhome <ctw@ctwhome.com>
Date: Thu, 14 Mar 2024 09:19:28 +0100
Subject: [PATCH] WIP

---
 src/lib/shaders/volume_transfer.frag           | 10 +++++-----
 src/routes/viewer/sceneSetup/updateMaterial.ts | 10 ++++++----
 2 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/src/lib/shaders/volume_transfer.frag b/src/lib/shaders/volume_transfer.frag
index a2d39b2..15752ec 100644
--- a/src/lib/shaders/volume_transfer.frag
+++ b/src/lib/shaders/volume_transfer.frag
@@ -1,13 +1,13 @@
 // This code is based upon Janelia's web-vol-viewer
 // https://github.com/JaneliaSciComp/web-vol-viewer
 
-precision highp float;
+precision mediump float;
 in vec3 rayDirUnnorm;
 in vec3 lightDir;
 
 uniform sampler2D transferTex;
-// uniform lowp sampler3D volumeTex;
 uniform lowp sampler3D volumeTex;
+uniform lowp sampler3D coarseVolumeTex;
 uniform float dtScale;
 uniform float finalGamma;
 uniform vec3 sunLightColor;
@@ -66,7 +66,7 @@ void main(void){
 
   tBox.x=max(tBox.x,0.);
 
-  ivec3 volumeTexSize=textureSize(volumeTex,0);
+  ivec3 volumeTexSize=textureSize(coarseVolumeTex,0);
   //  vec3 dt0 = 1.0 / (vec3(volumeTexSize) * abs(rayDir));
   vec3 dt0=1./(vec3(volumeTexSize)*abs(rayDir));
   float dt=min(dt0.x,min(dt0.y,dt0.z)) * 0.5;
@@ -101,8 +101,8 @@ void main(void){
   vec3 random=fract(sin(gl_FragCoord.x*12.9898+gl_FragCoord.y*78.233)*43758.5453)*dt*rayDir/8.0;
   for(float t=tBox.x;t<tBox.y;t+=dt){
 
-    float value=texture(volumeTex, pSized).r;
-    if(value != 0.0){
+    float value=texture(coarseVolumeTex, pSized).r;
+    if(value != 100.0){
       #pragma unroll_loop_start
       for(int i = 0; i < 8; ++i)
       {
diff --git a/src/routes/viewer/sceneSetup/updateMaterial.ts b/src/routes/viewer/sceneSetup/updateMaterial.ts
index cd424fd..070096b 100644
--- a/src/routes/viewer/sceneSetup/updateMaterial.ts
+++ b/src/routes/viewer/sceneSetup/updateMaterial.ts
@@ -2,6 +2,7 @@ import * as THREE from 'three';
 import { get } from 'svelte/store';
 import { volumeSizes } from '../stores/allSlices.store';
 import { boxes } from './boxSetup';
+import { coarseData } from '../fetchAndPrepareData/coarseData';
 
 
 // Be caruful with these valies, they can clip the data in the 3D scene
@@ -49,7 +50,9 @@ export function updateMaterial({ variable, dataUint8 }) {
       break;
 
     case 'qr':
-      volumeTexture = new THREE.Data3DTexture(dataUint8, sizes[0] / 8, sizes[1] / 8, sizes[2] / 8);
+      // uniforms?.coarseVolumeTex?.value?.dispose();
+
+      volumeTexture = new THREE.Data3DTexture(dataUint8, sizes[0], sizes[1], sizes[2]);
       volumeTexture.format = THREE.RedFormat;
       volumeTexture.minFilter = THREE.NearestFilter; // TODO: is this the best filter?
       volumeTexture.magFilter = THREE.NearestFilter;
@@ -57,6 +60,8 @@ export function updateMaterial({ variable, dataUint8 }) {
       uniforms.dtScale.value = dtScale;
       uniforms.alphaNorm.value = 2.0;
       uniforms.finalGamma.value = finalGamma;
+
+      uniforms.coarseVolumeTex.value = new THREE.Data3DTexture(coarseData(sizes, dataUint8), sizes[0] / 8, sizes[1] / 8, sizes[2] / 8);;
       break;
 
     case 'thetavmix':
@@ -76,7 +81,4 @@ export function updateMaterial({ variable, dataUint8 }) {
   //
   uniforms.volumeTex.value = volumeTexture;
 
-
-
-
 }