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Add support for MeshLab colored-STL method

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This commit is contained in:
omrips
2021-10-17 12:07:21 +03:00
committed by GitHub
parent e14585dff0
commit fbb7f5c389
1 changed files with 47 additions and 29 deletions
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src/parser.js
+47 -29
View File
@@ -1,4 +1,5 @@
//1.13
//1.13.1
//1.13.1 support for MagicLab colored-STL method
function parse_3d_file(filename, s, callback, jszip_path)
{
@@ -129,18 +130,25 @@ function parse_stl_bin(s)
var vertexIndex;
var f1,f2,f3;
var v1,v2,v3;
var color_bit=0;
var color_method_mt=false; //face colors are encoded Materialise Magics method (othereise it can be Meshlab method)
if (!s) return null;
//see if this is colored STL
var cpos=arrayBufferToString(s.slice(0,80)).toLowerCase().indexOf("color");
//cpos=true;
var fdata = new DataView(s, 0);
var only_default_color=true;
var have_face_colors=false;
var def_red_color=-1;
var def_green_color=-1;
var def_blue_color=-1;
if (cpos>-1)
{
//there is a color, get the default color
//there is a color (Materialise Magics format), get the default color
color_method_mt=true;
def_red_color=(fdata.getUint8 (cpos+6,true)) / 31;
def_green_color=(fdata.getUint8 (cpos+7,true)) / 31;
def_blue_color=(fdata.getUint8 (cpos+8,true)) / 31;
@@ -212,49 +220,59 @@ function parse_stl_bin(s)
}
v3=vertexIndex;
if (cpos>-1)
//color data (if any)
pos+=12;
face_color=fdata.getUint16(pos,true);
//color_bit=color_method_mt?1:(face_color & 1); //0000000000000001 => 1=have face color, 0=nope
color_bit=color_method_mt?1:((face_color & 32768)>>15); //1000000000000000 => 1=have face color, 0=nope
//console.log('color_bit', color_bit, face_color);
if (color_bit)
{
pos+=12;
//get 2 bytes of color (if any)
face_color=fdata.getUint16(pos,true);
if ((face_color==32768)||(face_color==65535))
if (color_method_mt)
{
//default color
color_red=def_red_color;
color_green=def_green_color;
color_blue=def_blue_color;
if ((face_color==32768)||(face_color==65535))
{
//default color
color_red=def_red_color;
color_green=def_green_color;
color_blue=def_blue_color;
}
else
{
have_face_colors=true;
color_red=((face_color & 31)/31); //0000000000011111
color_green=(((face_color & 992)>>5)/31); //0000001111100000
color_blue=(((face_color & 31744)>>10)/31); //0111110000000000
//the rgb are saved in values from 0 to 31 ... for us, we want it to be 0 to 1 - hence the 31)
}
}
else
{
only_default_color=false;
color_red=((face_color & 31)/31); //0000000000011111
//meshlab color format
have_face_colors=true;
color_blue=((face_color & 31)/31); //0000000000011111
color_green=(((face_color & 992)>>5)/31); //0000001111100000
color_blue=(((face_color & 31744)>>10)/31); //0111110000000000
//the rgb are saved in values from 0 to 31 ... for us, we want it to be 0 to 1 - hence the 31)
color_red=(((face_color & 31744)>>10)/31); //0111110000000000
}
//faces.push(new THREE.Face3(v1,v2,v3,1,new THREE.Color("rgb("+color_red+","+color_green+","+color_blue+")")));
faces.push(new Array(v1,v2,v3,color_red, color_green,color_blue ));
pos+=2;
faces.push(new Array(v1,v2,v3, color_red, color_green, color_blue));
}
else
{
//no color
//no color for face
//faces.push(new THREE.Face3(v1,v2,v3));
faces.push(new Array(v1,v2,v3));
pos+=14;
}
pos+=2;
}
vert_hash=null;
//console.log("CPOS: "+cpos+" only default: "+only_default_color);
return ({vertices:vertices, faces:faces, colors:((cpos>-1)&&(!only_default_color))});
return ({vertices:vertices, faces:faces, colors:have_face_colors});
}
catch(err)
{