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[#102 state:review-requested] supplied parser with a way to load file…
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…s that have been grabbed in one go
  • Loading branch information
aSydiK authored and aSydiK committed Apr 21, 2011
1 parent db8fe54 commit 7899c2c
Showing 1 changed file with 119 additions and 59 deletions.
178 changes: 119 additions & 59 deletions parsers/psi.js
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Original file line number Diff line number Diff line change
Expand Up @@ -525,73 +525,133 @@ var PSIParser = (function() {
//
var verts, cols, norms;

// Fix this
if(numVerts > 0 && !normalsPresent){
verts = new Float32Array(numVerts * 3);
}
//
if(onProgressCalled === true){

// !!! We need to fix this hack
if(colorsPresent && numVerts > 0){
numVerts = Math.floor(numVerts);
cols = new Float32Array(numVerts * 3);
}

// parsing normal values, not sure the logic behind it (as it was never provided)
// we take 3 bytes and apply some bit shifting operations on it
// we then take the results and multiply it to some set values
// the normals are the resulting values
if(normalsPresent){
norms = new Float32Array(numBytes);
var nzsign, nx11bits, ny11bits, ivalue;
var nvec = new Float32Array(3);
if(numVerts > 0 && !normalsPresent){
verts = new Float32Array(numVerts * 3);
}

if(colorsPresent && numVerts > 0){
cols = new Float32Array(numVerts * 3);
}

for(var i = 0; i < numBytes; i += 3){
ivalue = getXYZ(chunk, i);
nzsign = ((ivalue >> 22) & 0x0001);
nx11bits = ((ivalue) & 0x07ff);
ny11bits = ((ivalue >> 11) & 0x07ff);
// parsing normal values, not sure the logic behind it (as it was never provided)
// we take 3 bytes and apply some bit shifting operations on it
// we then take the results and multiply it to some set values
// the normals are the resulting values
if(normalsPresent){
norms = new Float32Array(numBytes);
var nzsign, nx11bits, ny11bits, ivalue;
var nvec = new Float32Array(3);

if(nx11bits >= 0 && nx11bits < 2048){
if(ny11bits >= 0 && ny11bits < 2048){
nvec[0] = (nx11bits/nfactor) - 1.0;
nvec[1] = (ny11bits/nfactor) - 1.0;

var nxnymag = (nvec[0]*nvec[0] + nvec[1]*nvec[1]);
if (nxnymag > 1){ nxnymag = 1; }
if (nxnymag < -1){ nxnymag = -1; }
nxnymag = 1 - nxnymag;

if (nxnymag > 1){ nxnymag = 1; }
if (nxnymag < -1){ nxnymag = -1; }
nvec[2] = Math.sqrt(nxnymag);

if (nzsign){ nvec[2] = -nvec[2]; }
var dNorm = (nvec[0]*nvec[0] + nvec[1]*nvec[1] + nvec[2]*nvec[2]);
if (dNorm > 0){ dNorm = Math.sqrt(dNorm); }
else{ dNorm = 1; }
for(var i = 0; i < numBytes; i += 3){
ivalue = getXYZ(chunk, i);
nzsign = ((ivalue >> 22) & 0x0001);
nx11bits = ((ivalue) & 0x07ff);
ny11bits = ((ivalue >> 11) & 0x07ff);

if(nx11bits >= 0 && nx11bits < 2048){
if(ny11bits >= 0 && ny11bits < 2048){
nvec[0] = (nx11bits/nfactor) - 1.0;
nvec[1] = (ny11bits/nfactor) - 1.0;

var nxnymag = (nvec[0]*nvec[0] + nvec[1]*nvec[1]);
if (nxnymag > 1){ nxnymag = 1; }
if (nxnymag < -1){ nxnymag = -1; }
nxnymag = 1 - nxnymag;

if (nxnymag > 1){ nxnymag = 1; }
if (nxnymag < -1){ nxnymag = -1; }
nvec[2] = Math.sqrt(nxnymag);

if (nzsign){ nvec[2] = -nvec[2]; }
var dNorm = (nvec[0]*nvec[0] + nvec[1]*nvec[1] + nvec[2]*nvec[2]);
if (dNorm > 0){ dNorm = Math.sqrt(dNorm); }
else{ dNorm = 1; }

norms[i] = nvec[0]/dNorm;
norms[i+1] = nvec[1]/dNorm;
norms[i+2] = nvec[2]/dNorm;
}
}
}
}
// parsing xyz and rgb values, not sure behind the logic either
// 3 bytes are used for each x, y, z values
// each of the last 3 bytes of the 12 correspond to an rgb value
else{
for(var i = 0, j = 0; i < numBytes; i+=12, j += 3){
verts[j] = ((xMax - xMin) * getXYZ(chunk, i )) / sfactor + xMin;
verts[j+1] = ((yMax - yMin) * getXYZ(chunk, i+3)) / sfactor + yMin;
verts[j+2] = ((zMax - zMin) * getXYZ(chunk, i+6)) / sfactor + zMin;

norms[i] = nvec[0]/dNorm;
norms[i+1] = nvec[1]/dNorm;
norms[i+2] = nvec[2]/dNorm;
}
if(cols){
cols[j] = getRGB(chunk, i+9 ) / 255;
cols[j+1] = getRGB(chunk, i+10) / 255;
cols[j+2] = getRGB(chunk, i+11) / 255;
}
}
}
}
// parsing xyz and rgb values, not sure behind the logic either
// 3 bytes are used for each x, y, z values
// each of the last 3 bytes of the 12 correspond to an rgb value
// if the file was obtained in one go
else{
for(var i = 0, j = 0; i < numBytes; i+=12, j += 3){
verts[j] = ((xMax - xMin) * getXYZ(chunk, i )) / sfactor + xMin;
verts[j+1] = ((yMax - yMin) * getXYZ(chunk, i+3)) / sfactor + yMin;
verts[j+2] = ((zMax - zMin) * getXYZ(chunk, i+6)) / sfactor + zMin;

if(normFlag){normalsPresent = true};
numVerts = numTotalPoints;

verts = new Float32Array(numVerts * 3);
if(colorsPresent){cols = new Float32Array(numVerts * 3);}

for(var i = 0, j = 0; i < numBytes; i+=12, j += 3){
verts[j] = ((xMax - xMin) * getXYZ(chunk, i )) / sfactor + xMin;
verts[j+1] = ((yMax - yMin) * getXYZ(chunk, i+3)) / sfactor + yMin;
verts[j+2] = ((zMax - zMin) * getXYZ(chunk, i+6)) / sfactor + zMin;

if(cols){
cols[j] = getRGB(chunk, i+9 ) / 255;
cols[j+1] = getRGB(chunk, i+10) / 255;
cols[j+2] = getRGB(chunk, i+11) / 255;
}
}

if(cols){
cols[j] = getRGB(chunk, i+9 ) / 255;
cols[j+1] = getRGB(chunk, i+10) / 255;
cols[j+2] = getRGB(chunk, i+11) / 255;
}
}
if(normalsPresent){
norms = new Float32Array(numVerts * 3);
var nzsign, nx11bits, ny11bits, ivalue;
var nvec = new Float32Array(3);

for(var i = numVerts*3; i < numBytes; i += 3){
ivalue = getXYZ(chunk, i);
nzsign = ((ivalue >> 22) & 0x0001);
nx11bits = ((ivalue) & 0x07ff);
ny11bits = ((ivalue >> 11) & 0x07ff);

if(nx11bits >= 0 && nx11bits < 2048){
if(ny11bits >= 0 && ny11bits < 2048){
nvec[0] = (nx11bits/nfactor) - 1.0;
nvec[1] = (ny11bits/nfactor) - 1.0;

var nxnymag = (nvec[0]*nvec[0] + nvec[1]*nvec[1]);
if (nxnymag > 1){ nxnymag = 1; }
if (nxnymag < -1){ nxnymag = -1; }
nxnymag = 1 - nxnymag;

if (nxnymag > 1){ nxnymag = 1; }
if (nxnymag < -1){ nxnymag = -1; }
nvec[2] = Math.sqrt(nxnymag);

if (nzsign){ nvec[2] = -nvec[2]; }
var dNorm = (nvec[0]*nvec[0] + nvec[1]*nvec[1] + nvec[2]*nvec[2]);
if (dNorm > 0){ dNorm = Math.sqrt(dNorm); }
else{ dNorm = 1; }

norms[i] = nvec[0]/dNorm;
norms[i+1] = nvec[1]/dNorm;
norms[i+2] = nvec[2]/dNorm;
}
}
}
}
}


Expand Down Expand Up @@ -632,7 +692,7 @@ var PSIParser = (function() {
normFlag = numPtArr[2] * 1;
}

// sptSzStr
// sptSzStr - needs work

// posMinStr - lowest value in the file (used for decompression)
tagExists = textData.indexOf(posMinStr);
Expand Down

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