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PFB-converter-kaitai-040.html
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PFB-converter-kaitai-040.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<body>
PFB files folder: <a href="https://pds-imaging.jpl.nasa.gov/data/mer/spirit/mer2mw_0xxx/data/navcam/site0137/">link</a><br>
PFB converter sources: <a href="https://github.com/jumpjack/VST-converter">link</a><br>
<br>
<!--
Get texture references from PFB file: <input type="file" id="inpHeaderFile" name = "inpHeaderFile" width="100" accept=".PFB" ><br>
Texture references: <span id = "spnTextureRef" name = "spnTextureRef">-</span><br>
Load PFB+texture : <input type="file" id="inpPFB_TXTfile" name = "inpPFB_TXTfile" width="100" accept= ".PFB,.img" multiple><br>
-->
Load PFB file only: <input type="file" id="inpPFBfile" name = "inpPFBfile" width="100" accept=".PFB"><br>
<span id="file_status" name="file_status" >waiting</span><br>
<span id="file_length" name="file_length" >-</span><br>
<button id="PLY" name="PLY" onclick = "savePLY()">Save as .PLY</button><br>
<br>
<button id="XYZ" name="XYZ" onclick = "saveXYZ()">Save as .XYZ</button><br>
<br>
<span id = "spnBlender" name="spnBlender"></span><br>
<span id = "spnTextureLinks" name="spnTextureLinks"></span><br>
<span id = "spnXYZLinks" name="spnXYZLinks"></span><br>
<span id = "spnThumbnails" name="spnThumbnails"></span><br>
<script src="KaitaiStream.js"></script>
<script src="PFB.js"></script>
<script src="img_gray16.js"></script>
<script>
// 0.4.0 - Added list of textures, meshes and their folders
// Added list of product ids for direct import in Blender using modded "phaseIV/Blender-Navcam-Importer" (https://github.com/jumpjack/Blender-Navcam-Importer)
// 0.3.0 -
// 0.2.0 - XYZ export working; experimenting with faces and PLY export (faces not working, format unknown)
/* Nodes types (https://irix7.com/techpubs/007-2783-001.pdf) :
pfNode General node (base class)
pfScene Top level node.
pfGroup Node with multiple children.
pfSCS Static coordinate system.
pfDCS Dynamic coordinate system.
pfLOD Level of detail node.
pfSequence Sequential animation node.
pfSwitch Switch node.
pfLayer Layer or decal node.
pfGeode Fundamental geometry node.
pfGeoStates [graphic state]
pfGeoSets [geometry]
pfBillboard Special tracking leaf node.
pfLightPoint One or more emissive light points.
pfLightSource Definition of a graphics hardware light.
pfPartition Special culling acceleration node.
pfText 2D and 3D text geometry.
list of pfStrings
pfMorph Geometry morphing node.
pfMaterial
pfMtlSide
pfMtlAlpha
pfMtlShininess
pfMtlColor
pfMtlColorMode
pfTexture
pfTexName
pfTexImage
pfGetTexImage(const pfTexture* tex, uint** image, int* comp, int* sx, int* sy, int* sz);
image is an array of 4-byte words containing the texel data
The texture image is loaded from left to right, bottom to top
comp: number of 8-bit components per image pixel; 1, 2, 3, and 4 component textures are supported
ns, nt, nr: number of texels in the s, t, and r dimensions of image
pfTexBorderColor
pfTexBorderType
pfTexFormat
pfTexFilter
pfTexRepeat
pfTexSpline
pfTexDetail
pfDetailTexTile
pfTexList
pfTexFrame
pfTexLoadMode
pfTexLevel
*/
/*
================== TEXTURES ===============
https://techpubs.jurassic.nl/manuals/0640/developer/Perf_GetStarted/sgi_html/ch08.html
Textures can have as many as four components. The following are example uses:
1 component: intensity (I) or luminance (L) only.
2 components: intensity and transparency (IA).
3 components: red, green, and blue (RGB).
4 components: red, green, blue, and alpha (RGBA).
*/
/*
// ????????:
// https://github.com/NPSNET-IV/NPSNET-IV/blob/09ad5905964b1eb3463b8500b0a6c541707fa13f/src/database/tsg/tsgROpen.c
pfTexEnv *tenv;
ieee32 red,green,blue,alpha;
int8 bval;
int mode_val;
pfTexGen *tgen;
int8 bval;
ieee32 x,y,z,d; // texture plane equation
int mode_val,type;
int i;
pfTexture *tex;
char *name;
int8 clamp;
int i;
int pfflags;
int32 flags;
pfGeoState *gst;
void *arena = pfGetSharedArena();
int8 bval;
int32 ival;
ieee32 fval;
int mode_val;
pfMaterial *mtl;
int i,j,k;
int8 fieldid;
pfMaterial *mtl;
int8 bval;
ieee32 fval;
ieee32 color[3];
int mode_val,side,colormode_side;
pfColortable *table;
int32 numcolors;
ieee32 red,green,blue,alpha;
pfVec4 color;
int i;
pfFog *fog;
int8 bval;
ieee32 red,green,blue;
ieee32 near,far;
ieee32 bias;
ieee32 *range,*density;
int32 numpoints;
int mode_val;
void *arena = pfGetSharedArena();
int i;
pfLightModel *lmodel;
int8 bval;
ieee32 atten0,atten1,atten2;
int mode;
ieee32 red,green,blue;
*/
myPFB = null;
myImg = null;
TEXTURE_WIDTH = 1024; // to do: implement KSY reader for just PDS label, extract texture metadata and use them to implement generic texture reader
TEXTURE_HEIGHT = 1024;
MAGIC_LENGTH = 4;
UNK_LENGTH = 4;
PFB_HEADER_LENGTH = MAGIC_LENGTH + 3*UNK_LENGTH; // 16 bytes
TYTPE_LENGTH = 4;
COUNT_LENGTH = 4;
TOTAL_SIZE_LENGTH = 4;
NODE_HEADER_LENGTH = TYTPE_LENGTH + COUNT_LENGTH + TOTAL_SIZE_LENGTH; // 12 bytes
OPPORTUNITY = "1"; // First letter of filename
SPIRIT = "2";
roverName = ["","opportunity", "spirit"];
PLY_HEADER_BASE = "" +
"ply\n" +
"format ascii 1.0\n" +
"comment Created by PFB JS convereter\n" +
"element vertex VVVV\n" +
"property float x\n" +
"property float y\n" +
"property float z\n" +
/* "TTTT" +*/
"element face FFFF\n" +
"property list uchar int vertex_index\n" +
"end_header\n";
PLY_TEXTURE_HEADER = "" +
"property uchar red\n" +
"property uchar green\n" +
"property uchar blue\n";
PLYfiles = [];
XYZfiles = [];
/*
const headerSelector = document.getElementById('inpHeaderFile');
headerSelector.addEventListener('change', (event) => {
loadPFBheader(event.target.files[0])
});
*/
/*
const PFB_TXT_Selector = document.getElementById('inpPFB_TXTfile');
PFB_TXT_Selector.addEventListener('change', (event) => {
if (event.target.files.length !== 2) {
alert("You must select one .PFB file and one .img file");
return;
} else {
loadPFB_TXT(event.target.files[0], event.target.files[1])
}
});
*/
const PFB_Selector = document.getElementById('inpPFBfile');
PFB_Selector.addEventListener('change', (event) => {
loadPFB(event.target.files[0])
});
function saveFile(fileContent, filename,status_id) {
myBlob = new Blob([fileContent], {type: "application/octet-stream"});
var url = window.URL.createObjectURL(myBlob);
var anchor = document.createElement("a");
anchor.href = url;
anchor.download = filename;
// a(anchor);
anchor.addEventListener('load', (event) => {
console.log("LOAD");
});
anchor.addEventListener('ended', (event) => {
console.log("ENDED");
});
anchor.addEventListener('loadeddata', (event) => {
console.log("loadeddata");
});
anchor.addEventListener('loadstart', (event) => {
console.log("loadstart");
});
anchor.addEventListener('mousedown', (event) => {
console.log("mousedown");
});
anchor.click();
window.URL.revokeObjectURL(url);
document.getElementById(status_id).innerHTML = "Saved to " + filename;
}
/*
function loadPFBheader(fileHandler) {
const reader = new FileReader();
reader.addEventListener('load', (event) => {
rawFileContents = event.target.result;
fileContentsUInt8 = new Uint8Array(rawFileContents);
console.log("Loaded: ", event, rawFileContents.length);
document.getElementById("file_status").innerHTML = "Loaded";
document.getElementById("file_length").innerHTML = fileContentsUInt8.length + " bytes";
st = new KaitaiStream(fileContentsUInt8);
myPFBHeader = new PFBh(st);
console.log("This file contains:");
console.log(myPFBHeader.vistaHeader.lodsCount, " LODs");
sliceUInt8 = myPFBHeader.textureRef;
textureRefRaw = String.fromCharCode(...sliceUInt8)
textureRef = textureRefRaw.split("\x00");
textureName = textureRef[2];
spnTextureRef.innerHTML = textureName;
//console.log(textureName);
});
reader.readAsArrayBuffer(fileHandler);
console.log("Header reading process initiated...");
}
*/
/*
function loadPFB_TXT(handler1, handler2) {
//console.log(handler1, handler2)
if (handler1.name.toUpperCase().indexOf("IMG") >= 0) {
textureHandler = handler1;
PFBHandler = handler2;
} else {
textureHandler = handler2;
PFBHandler = handler1;
}
//console.log("TEXTURE:", textureHandler)
//console.log("PFB:", PFBHandler)
const reader = new FileReader();
reader.addEventListener('load', (event) => {
rawFileContents = event.target.result;
fileContentsUInt8 = new Uint8Array(rawFileContents);
console.log("Loaded: ", event, rawFileContents.length);
document.getElementById("file_status").innerHTML = "Loaded";
document.getElementById("file_length").innerHTML = fileContentsUInt8.length + " bytes";
st = new KaitaiStream(fileContentsUInt8);
myImg = new ImgGray16(st);
console.log("myImg=",myImg);
for (x=0; x< 1023; x++) {
for(y=0; y<1023; y++) {
rgb = (myImg.lines[y].samples[x])/10;
r = rgb;
g = rgb;
b = rgb;
writeCanvas(x,y,r,g,b);
}
}
loadPFB(PFBHandler);
});
reader.readAsArrayBuffer(textureHandler);
console.log("Texture+PFB reading process initiated...");
}
*/
nodeTypes = [
"Materials", //0
"Textures list", //1
"Texenv?", //2
"GeoStates", //3
"Lenghts lists", //4
"Vertex lists", //5
"Colors lists", //6
"Normals lists", //7
"Texcoords lists",//8
"UNKNOWN", //9
"GeoSets", //10
"UNKNOWN", //11
"Nodes", //12
"UNKNOWN", //13
"UNKNOWN", //14
"UNKNOWN", //15
"UNKNOWN", //16
"TexGens", //17
"Light models", //18
"UNKNOWN", //19
"UNKNOWN", //20
"UNKNOWN", //21
"UNKNOWN", //22
"UNKNOWN", //23
"UNKNOWN", //24
"UNKNOWN", //25
"UNKNOWN", //26
"Images", //27
]
function loadPFB(fileHandler) {
totalListLenght = [];
totalLenght = 0;
myName = fileHandler.name;
const reader = new FileReader();
reader.addEventListener('load', (event) => {
rawFileContents = event.target.result;
fileContentsUInt8 = new Uint8Array(rawFileContents); // Extract from the generic ArrayBuffer an array of Unsigned Integers (0..255)
console.log("Loaded", rawFileContents.byteLength , " bytes.");
document.getElementById("file_status").innerHTML = "Loaded";
document.getElementById("file_length").innerHTML = fileContentsUInt8.length + " bytes";
st = new KaitaiStream(fileContentsUInt8);
myPFB = new Pfb (st);
nodeOffset = PFB_HEADER_LENGTH;
console.log(myPFB);
console.log("Nodes num.:", myPFB.nodes.length);
vertexDB = [];
vertexDBstr = "";
facesDB = [];
facesDBstr = "";
normalsDB = [];
normalsDBstr = "";
for (var nodeIndex = 0; nodeIndex < myPFB.nodes.length; nodeIndex++) {
thisNode = myPFB.nodes[nodeIndex];
console.log(nodeIndex +
" - type: " + thisNode.type + " (" + nodeTypes[thisNode.type] + "), count: " +
myPFB.nodes[nodeIndex].contents.count + ", size: dec" +
myPFB.nodes[nodeIndex].contents.totalSize + ", Offset: 0x" +
nodeOffset.toString(16)
);
/////// Put all vertices in a single sequence:
if (nodeTypes[thisNode.type].toUpperCase().indexOf("VERTEX") >= 0 ) {
totalListLenghtV = [];
totalLenghtV = 0;
//console.log("Building vertex db...");
for (var listIndex=0 ; listIndex<thisNode.contents.lists.length; listIndex++) {
var thisListV = thisNode.contents.lists[listIndex];
//console.log("Processing list " + listIndex + ", containing " + thisListV.elements.length + " vertices...");
totalListLenghtV[listIndex] = 0;
for (var elemIndex = 0; elemIndex < thisListV.elements.length ;elemIndex++) {
totalListLenghtV[listIndex] += 1
vertexObj = thisListV.elements[elemIndex];
vertexDB.push(vertexObj);
vertexStr = "";
vertexStr += vertexObj.x + " " + vertexObj.y + " " + vertexObj.z;
vertexDBstr += vertexStr + "\n";
}
// console.log(" ListV " , listIndex, ": ", thisListV.size , " vertices, ", totalListLenght[listIndex] );
totalLenghtV += totalListLenghtV[listIndex];
}
}
/////// Create faces as groups of pointers to vertices
// LENGTHSLISTS
// |
// +-- Num of lists (69)
// |
// +-- LENGHTSLIST [0]
// | |
// | +-- Num of lengths (54)
// | |
// | +-- LENGTH 0 = 3 // 3 vertex = 1 triangle in the strip? Each length means 1 strip?
// | |
// | +-- LENGTH 1 = 6 // 6 vertex = 4 triangles in the strip? Each length means 1 strip?
// | |
// | ...
// | |
// | +-- LENGTH 63 = 4
// |
// |
// +-- LENGHTSLIST [1]
// |
// ...
// |
// +-- LENGHTSLIST [68]
//
// Each lenght a strip? How many triangles? len or len-2 as in VST format?
if (nodeTypes[thisNode.type].toUpperCase().indexOf("LENGHTS") >= 0 ) {
var listsCount = thisNode.contents.lists.length;
vertexOffset = 0;
strips = [];
for (var listIndex=0 ; listIndex < listsCount; listIndex++) { // Each list is a strip of faces or a list of strips of faces?
thisList = thisNode.contents.lists[listIndex];
arrayLengths = thisList.elements; // Each length refers to a strip, i.e. length <=> strip
for (var arrayLengthIndex = 0; arrayLengthIndex < arrayLengths.length; arrayLengthIndex++) {
var thisArrayLength = arrayLengths[arrayLengthIndex];
// array = [0,1,2,3,4], arrayLength = 5, striplLength = 3
strip = [];
for(var triangleIndex = 2; triangleIndex < thisArrayLength; triangleIndex++) { // Create triangle strip
triangle = [vertexOffset+2, vertexOffset+1, vertexOffset+0];
strip.push(triangle);
vertexOffset++;
} // parse vertices
strips.push(strip);
} // parse lengths
} // parse lists
} // if node is lengthslists
if (nodeTypes[thisNode.type].toUpperCase().indexOf("TEXTURES LIST") >= 0 ) {
console.log("====== TEXTURE Files ====");
texturesList = thisNode.contents.textures;
blenderList = "";
productsList = "<br>";
textureLinksArray = [];
XYZlinksArray = [];
thumbnailLinksArray = [];
textureFolderLinksArray = [];
XYZfolderLinksArray = [];
texturesList.forEach ((textureElement) => {
console.log(textureElement.filename.contents);
/*
2N290962708XYLB0HMP0755L0M2
# 0: 2 = MER2
# 1: N = Navcam
# 2-10: 290962708 = Spacecraft clock
# 11-13: XYL = XYL product
# 14-15: B0 = site
# 16-17: HM = drive/position w.r.t site
# 18-22: P0755 = sequence (P - PMA & Remote Sensing instr. (Pancam, Navcam, Hazcam, MI, Mini-TES)
# 23: L = left
# 24: 0 = filter
# 25: M = Author (MIPL)
# 26: 2 = Product version
*/
roverId = textureElement.filename.contents.substr(0,1);
cameraId = textureElement.filename.contents.substr(1,1)
sclk = textureElement.filename.contents.substr(2,9);
sol = sclkToSol(sclk, roverId);
siteId = textureElement.filename.contents.substr(14,2);
driveId = textureElement.filename.contents.substr(16,2);
sequenceId = textureElement.filename.contents.substr(18,5);
textureBaseUrl = "https://pds-imaging.jpl.nasa.gov/data/mer/" + roverName[roverId*1] + "/mer" + roverId + cameraId.toLowerCase() + "o_0xxx/browse/sol" + zeroes(sol,4) + "/rdr/";
XYZBaseUrl = "https://pds-imaging.jpl.nasa.gov/data/mer/" + roverName[roverId*1] + "/mer" + roverId + cameraId.toLowerCase() + "o_0xxx/data/sol" + zeroes(sol,4) + "/rdr/";
rawProductId = textureElement.filename.contents.toUpperCase().replace(".RGB","");
blenderList += rawProductId + ",";
productsList += rawProductId + " - (clock: " + sclk + ", sol: " + sol + ", site: " + siteId + ", drive: " + driveId + ", sequence: " + sequenceId + ")<br>";
textureProductId = rawProductId.replace("XYL","FFL").toLowerCase();
textureLink = textureBaseUrl + textureProductId + ".img.jpg";
textureLinksArray.push(textureLink);
XYZproductId = rawProductId.toLowerCase();
XYZLink = XYZBaseUrl + XYZproductId + ".img";
XYZlinksArray.push(XYZLink);
thumbnailProductId = rawProductId.replace("XYL","RSN").toLowerCase();
thumbnailLink = textureBaseUrl + thumbnailProductId + ".img.jpg";
thumbnailLinksArray.push(thumbnailLink);
textureFolderLinksArray.push(textureBaseUrl);
XYZfolderLinksArray.push(XYZBaseUrl);
});
blenderList = blenderList.substr(0,blenderList.length-1);
console.log("Textures list for blender importer:");
console.log(blenderList);
console.log("Links list:");
console.log(textureLinksArray);
console.log(XYZlinksArray);
console.log(thumbnailLinksArray);
addLinksToPage();
} // if node is Textures
if (nodeTypes[thisNode.type].toUpperCase().indexOf("NORMALS LIST") >= 0 ) {
totalListLenghtN = [];
totalLenghtN = 0;
//console.log("Building normals db...");
for (var listIndex=0 ; listIndex<thisNode.contents.lists.length; listIndex++) {
var thisListN = thisNode.contents.lists[listIndex];
//console.log("Processing list " + listIndex + ", containing " + thisListN.elements.length + " vertices...");
totalListLenghtN[listIndex] = 0;
for (var elemIndex = 0; elemIndex < thisListN.elements.length ;elemIndex++) {
totalListLenghtN[listIndex] += 1
normalObj = thisListN.elements[elemIndex];
normalsDB.push(normalObj);
normalStr = "";
normalStr += normalObj.x + " " + normalObj.y + " " + normalObj.z;
normalsDBstr += normalStr + "\n";
}
// console.log(" ListV " , listIndex, ": ", thisListN.size , " vertices, ", totalListLenght[listIndex] );
totalLenghtN += totalListLenghtN[listIndex];
}
} // if node is NormalsLists
nodeOffset += NODE_HEADER_LENGTH + thisNode.contents.totalSize;
} // nodes
console.log("Vertex:", totalLenghtV );
console.log("Normals:", totalLenghtN );
createPLY();
//console.log(">>>>>>>>>>>>> STRIPS: ",strips);
/*console.log("Vertici:", vertexDB);
console.log("Vertici:", vertexDBstr);
console.log("Facce:", facesDB);
console.log("Facce:", facesDBstr);
*/
XYZfile = "";
vertexGlobalIndex = 0;
var PFBvertexNode = myPFB.nodes[1]; // debug: non è detto che sia sempre in posizione 1
var PFBvertexLists = PFBvertexNode.contents.lists;
for (var vertListIndex = 0; vertListIndex < PFBvertexLists.length; vertListIndex++) {
PFBvertList = PFBvertexLists[vertListIndex];
for (var vertIndex = 0; vertIndex < PFBvertList.elements.length; vertIndex++) {
var vertex = PFBvertList.elements[vertIndex];
XYZline = "" +
vertex.x + " " +
vertex.y + " " +
vertex.z;
/* if (normalsDB.length > 0) {
XYZline += "" +
normalsDB[vertexGlobalIndex]
}*/
vertexGlobalIndex++;
XYZfile += XYZline + "\n";
}
}
alert("Done");
});
reader.readAsArrayBuffer(fileHandler);
}
function createPLY() {
for (stripIndex = 0; stripIndex < strips.length; stripIndex++) {
strip = strips[stripIndex];
for (var triangleIndex = 0; triangleIndex < strip.length; triangleIndex++) {
triangle = strip[triangleIndex];
face = []
faceStr = triangle.length + " ";
for (var vertexIndex =0; vertexIndex<triangle.length; vertexIndex++) {
vertexPointer = triangle[vertexIndex];
face.push(vertexPointer);
faceStr += vertexPointer + " ";
}
facesDB.push(face);
facesDBstr += faceStr + "\n";
}
}
PLYheader = PLY_HEADER_BASE.replace("VVVV", vertexDB.length);
PLYheader = PLYheader.replace("FFFF", facesDB.length);
PLYfile = PLYheader + vertexDBstr + facesDBstr;
}
function savePLY() {
saveFile(PLYfile, myName + ".ply","file_status");
}
function saveXYZ() {
saveFile(XYZfile, myName + ".txt","file_status");
}
function loadTexture() {
}
function sclkToSol(sclkstring, rover) {
// Calculate sol number given SCLK string (credits: https://github.com/phaseIV/Blender-Navcam-Importer )
console.log("sclkstring=",sclkstring);
MSD = (sclkstring/88775.244) + 44795.9998;
console.log("MSD=",MSD);
sol = MSD - 49269.2432411704;
sol = sol + 1; // for sol 0
sol = Math.floor(Math.ceil(sol));
deviate = 0;
if (rover == OPPORTUNITY) {
deviate = 3028
}
if (rover == SPIRIT) {
deviate = 3048
}
return sol+deviate
}
function zeroes(number, figures) {
temp = "";
for(var i = figures; i > 0 ; i--) {
confr = 10**(i-1);
if (number < confr)
temp += "0";
}
return temp + number;
}
function addLinksToPage() {
document.getElementById("spnBlender").innerHTML = "Past this sequence into <a href='https://github.com/jumpjack/Blender-Navcam-Importer'>Blender Navcam Importer</a> dialog:<br>" + blenderList + "<br>" + productsList + "<br>";
document.getElementById("spnTextureLinks").innerHTML = "Links to save in %TEMP%\\MarsRoverImages\\mer\\gallery\\all\\" + roverId + "\\" + cameraId.toLowerCase() + "\\" + zeroes(sol,4) + "<br>";
for (var textureIndex = 0; textureIndex < textureLinksArray.length; textureIndex++) {
console.log("aggiungo " + textureLinksArray[textureIndex] );
document.getElementById("spnTextureLinks").innerHTML += "<a href='" + textureLinksArray[textureIndex] + "'>" + textureLinksArray[textureIndex] + "</a> (<a href='" + textureFolderLinksArray[textureIndex] + "'>Folder</a>)<br>";
}
// C:\Users\USER\AppData\Local\Temp\MarsRoverImages\mer\mer2no_0xxx\data\sol01907
document.getElementById("spnXYZLinks").innerHTML = "Links to save in %TEMP%\\MarsRoverImages\\mer\\mer" + roverId + cameraId.toLowerCase() + "o_0xxx\\data\\sol" + zeroes(sol,4) + "<br>";
for (var XYZIndex = 0; XYZIndex < XYZlinksArray.length; XYZIndex++) {
console.log(" aggiungo " + XYZlinksArray[XYZIndex] );
document.getElementById("spnXYZLinks").innerHTML += "<a href='" + XYZlinksArray[XYZIndex] + "'>" + XYZlinksArray[XYZIndex] + "</a> (<a href='" + XYZfolderLinksArray[XYZIndex] + "'>Folder</a>)<br>";
}
document.getElementById("spnThumbnails").innerHTML = "";
for (var thIndex = 0; thIndex < thumbnailLinksArray.length; thIndex++) {
console.log(" aggiungo " + thumbnailLinksArray[thIndex] );
document.getElementById("spnThumbnails").innerHTML += "<img src='" + thumbnailLinksArray[thIndex] + "'>";
}}
</script>
</body>
</html>