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VST-converter-kaitai-010.html
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VST-converter-kaitai-010.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<body>
Open file<br>
<input type="file" id="inpFile" width="100" accept=".vst"><br>
<span id="file_status" name="file_status" >waiting</span><br>
<span id="file_length" name="file_length" >-</span><br>
<button id="PLY0" name="PLY0" onclick = "saveFile(PLYfiles[0], 'LOD0.ply','file_status')">Save LOD 0 as .ply</button><br>
<button id="PLY1" name="PLY1" onclick = "saveFile(PLYfiles[1], 'LOD1.ply','file_status')">Save LOD 1 as .ply</button><br>
<button id="PLY2" name="PLY2" onclick = "saveFile(PLYfiles[2], 'LOD2.ply','file_status')">Save LOD 2 as .ply</button><br>
<button id="PLY3" name="PLY3" onclick = "saveFile(PLYfiles[3], 'LOD3.ply','file_status')">Save LOD 3 as .ply</button><br>
<button id="PLY4" name="PLY4" onclick = "saveFile(PLYfiles[4], 'LOD4.ply','file_status')">Save LOD 4 as .ply</button><br>
<button id="PLY5" name="PLY5" onclick = "saveFile(PLYfiles[5], 'LOD5.ply','file_status')">Save LOD 5 as .ply</button><br>
<br>
<button id="XYZ0" name="XYZ0" onclick = "saveFile(XYZfiles[0], 'LOD0.txt','file_status')">Save LOD 0 as .XYZ</button><br>
<button id="XYZ1" name="XYZ1" onclick = "saveFile(XYZfiles[1], 'LOD1.txt','file_status')">Save LOD 1 as .XYZ</button><br>
<button id="XYZ2" name="XYZ2" onclick = "saveFile(XYZfiles[2], 'LOD2.txt','file_status')">Save LOD 2 as .XYZ</button><br>
<button id="XYZ3" name="XYZ3" onclick = "saveFile(XYZfiles[3], 'LOD3.txt','file_status')">Save LOD 3 as .XYZ</button><br>
<button id="XYZ4" name="XYZ4" onclick = "saveFile(XYZfiles[4], 'LOD4.txt','file_status')">Save LOD 4 as .XYZ</button><br>
<button id="XYZ5" name="XYZ5" onclick = "saveFile(XYZfiles[5], 'LOD5.txt','file_status')">Save LOD 5 as .XYZ</button><br>
<script src="KaitaiStream.js"></script>
<script src="Vst.js"></script>
<script>
//LODS_TO_PROCESS = 1;
PLY_HEADER_BASE = "" +
"ply\n" +
"format ascii 1.0\n" +
"comment Created by VST JS convereter\n" +
"element vertex VVVV\n" +
"property float x\n" +
"property float y\n" +
"property float z\n" +
"element face FFFF\n" +
"property list uchar int vertex_index\n" +
"end_header\n"
PLYfiles = [];
XYZfiles = [];
//console.log(KaitaiStream);
//console.log(KaitaiStream.byteArrayCompare);
const fileSelector = document.getElementById('inpFile');
fileSelector.addEventListener('change', (event) => {
loadFile(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 loadFile(fileHandler) {
VST_HEADER_LENGTH = 1+1+1+1 + 1+1+1+1 + 4 + 4 + 1+1+1+1 + 1+1+1+1+1+1+1+1 + 4 + 4 + 4; // 40
BOUNDING_BOX_LENGTH = 6*4; // 24
TEXTURE_REF_LENGTH = 2048;
COORDINATE_SYSTEM_LENGTH = 4096;
LOD_HEADER_LENGTH = 4 + 1+1+1+1+1+1+1+1 + 4 + 4 + 4 + 4; //28
PATCH_HEADER_LENGTH = 8 + 4 + 4 + 4 + 4; // 24
console.log("File to open:" ,fileHandler);
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: ", event, rawFileContents.length);
document.getElementById("file_status").innerHTML = "Loaded";
document.getElementById("file_length").innerHTML = fileContentsUInt8.length + " bytes";
st = new KaitaiStream(fileContentsUInt8);
myVst = new Vst(st);
totalFileLength = VST_HEADER_LENGTH +
BOUNDING_BOX_LENGTH +
TEXTURE_REF_LENGTH * myVst.vistaHeader.texturesCount +
COORDINATE_SYSTEM_LENGTH +
myVst.vistaHeader.vertexCount*20;
LODsLength = 0;
console.log("This file contains:");
console.log(myVst.lods.length, " LODs");
sliceUInt8 = myVst.textureRef;
textureRefRaw = String.fromCharCode(...sliceUInt8)
textureRef = textureRefRaw.split("\x00");
textureName = textureRef[2];
console.log(textureName);
LODS_TO_PROCESS = myVst.lods.length; //debug
prevLODvertexCount = 0;
for (var lodIndex = 0; lodIndex < LODS_TO_PROCESS; lodIndex++) {
trianglesInLOD = 0;
myLOD = myVst.lods[lodIndex];
LODsLength += LOD_HEADER_LENGTH + BOUNDING_BOX_LENGTH;
lastVertex = myLOD.header.highestVertex;
LODvertexCount = myLOD.header.vertexCount;
firstVertex = lastVertex - LODvertexCount + 1;
console.log(" LOD n. " + lodIndex);
console.log(" Contains n. " + myLOD.header.patchesCount + " patches.");
console.log(" Uses vertex from " + firstVertex + " to " + lastVertex);
LODtrianglesCount = 0; // For PLY output
PLYvertex = "";
PLYfaces = "";
PLYfiles.push("");
for (var patchIndex = 0; patchIndex < myLOD.header.patchesCount; patchIndex++) {
myPatch = myLOD.patches[patchIndex];
totalPatchLength = PATCH_HEADER_LENGTH + myPatch.header.stripsCount*4 + myPatch.header.indexCount*4;
LODsLength += totalPatchLength;
console.log(" Patch n. " + patchIndex);
console.log(" Arrays/Strips num: ", myPatch.header.stripsCount);
console.log(" Arrays lengths:", myPatch.trianglesStripsLengths);
console.log(" Total length: ", totalPatchLength);
pointers = myPatch.pointersToVertexOfFaces; // Pointers to vertex database at beginning of file
XYZfile = "";
for (p=0; p < pointers.length; p++) {
vertex = myVst.vertices[pointers[p]];
XYZline = vertex.x + " " + vertex.y + " " + vertex.z + "\n";
XYZfile += XYZline;
}
XYZfiles.push(XYZfile);
triangleStrips = [];
arrayOffset = 0;
arrayLen = 0; // dummy value, to properly calculate first arrayOffset (=0)
processedTriangles = 0;
// The "arrays" are actually just a sequence of values; how many values form
// an array depends on arrayLen values; such values are stored in sequence, just before the arrays.
totalArraysTrianglesCount = 0;
for (arrayIndex = 0; arrayIndex < myPatch.header.stripsCount; arrayIndex++) {
// An = length of array n
// Sn = An - 2 = lenght of strip n = number of triangles
// Triangle n.1: vertex 0, 1, 2 of array
// Following triangles: Using the remaining (Sn -1) vertex after vertex 2
//
// Example:
// Array: [10, 15, 14, 18, 17, 11]
// ^^^^^^^^^^^ ^^^^^^^^^
// | | | |
// | | | |
// \ | / |
// Triangle n.1 |
// \- Further triangles
//
// [10, 15, 14, 18, 17, 11]
// | | |
// | | |
// \ | /
// n.2
//
// [10, 15, 14, 18, 17, 11]
// | | |
// | | |
// \ | /
// n.3
//
// [10, 15, 14, 18, 17, 11]
// | | |
// | | |
// \ | /
// n.4
//
// Array lenght : 6
// Strip lenght (= number of triangles): Sn = 6-2 = 4
// First triangle: [10, 15, 14]
// Other triangles are described by 3 vertex (Sn-1 = 3) after vertex of first triangle: 18, 17, 11
arrayOffset += arrayLen;
arrayLen = myPatch.trianglesStripsLengths[arrayIndex];
trianglesCount = arrayLen - 2; // Sn = An-2 0 number of triangles/faces in this strip
totalArraysTrianglesCount += trianglesCount;
//console.log("Processing array n.", arrayIndex , "(from pos. " , arrayOffset , " to pos " , (arrayOffset + arrayLen-1) );
triangleStrip = [];
triangles = [];
for (triangleIndex = 0 + 2; triangleIndex < arrayLen; triangleIndex++) {
//console.log("Processing triangle n." + (triangleIndex-1) + " of " + (arrayLen-3));
triangle = [];
PLYface = "3 "; // Always triangles
for (pointIndex = 0; pointIndex < 3; pointIndex++) {
if (triangleIndex % 2 == 0) { // Even triangle => CCW, Odd triangle => CW
vertexPointer = pointers[arrayOffset + triangleIndex - pointIndex];
} else {
vertexPointer = pointers[arrayOffset + triangleIndex - (2-pointIndex)];
}
//console.log("Adding point n." + (pointIndex+1) + " of 3");
// [ [1, 3, 5, 7], [11, 10, 8, 7, 9, 14 , 15], 6[, ...] Arrays database (=sequence of integers)
// ^^^^^^^^^^^ ^^^^^^^^^^
// | ^ | ^
// | | | |
// | triangleIndex | triangleIndex
// | (2..3) | (2..6)
// | |
// | |
// \- Array offset \- Array offset
// (constant) (constant)
x = myVst.vertices[vertexPointer].x;
y = myVst.vertices[vertexPointer].y;
z = myVst.vertices[vertexPointer].z;
point = {x, y, z};
PLYface += (vertexPointer - firstVertex) + " "; // Each ply file has its own independent index list starting from 0
triangle.push(point)
} // point
triangles.push(triangle);
PLYfaces += PLYface + "\n";
LODtrianglesCount++;
} // triangle
triangleStrips.push(triangles);
processedTriangles += triangles.length;
} // arrayIndex
trianglesInLOD += totalArraysTrianglesCount;
} // patches
PLYheader = PLY_HEADER_BASE.replace("VVVV", LODvertexCount);
PLYheader = PLYheader.replace("FFFF", LODtrianglesCount);
PLYfiles[lodIndex] += PLYheader;
console.log("FIRST,LAST=",firstVertex,lastVertex);
for (v=firstVertex; v <= lastVertex; v++) {
PLYvertex += myVst.vertices[v].x + " " + myVst.vertices[v].y + " " + myVst.vertices[v].z + "\n";
}
PLYfiles[lodIndex] += PLYvertex;
PLYfiles[lodIndex] += PLYfaces;
//console.log("File ply for LOD n. :" , lodIndex, PLYfiles[lodIndex]);
prevLODvertexCount = LODvertexCount;
console.log("triangles expected :",trianglesInLOD)
console.log("triangles processed :",processedTriangles)
} // LODs
totalFileLength += LODsLength;
console.log("totalFileLength=",totalFileLength);
// for (lodIndex=0; lodIndex < LODS_TO_PROCESS; lodIndex++) {
// saveFile(PLYfiles[lodIndex], "LOD"+lodIndex + ".ply","file_status");
// saveFile(XYZfiles[lodIndex], "LOD"+lodIndex + ".txt","file_status");
// }
alert("Done");
});
reader.readAsArrayBuffer(fileHandler);
console.log("Reading process initiated...");
}
</script>
</body>
</html>