This is a series of nodejs script to analyse and explore STEP (ISO 10303) file format.
This projet provides a very basic EXPRESS grammar It focuses in exploring part assemblies inside STEP files as per AP 203.
var STEP = require("node-step"); var reader = new STEP.StepReader(); reader.read("parts/anchor.step",function(err) { if (err) { console.log("failure :" + err); return; } var product_definitions = reader.getObjects("PRODUCT_DEFINITION"); });to explore an assembly :
var STEP = require("node-step"); var reader = new STEP.StepReader(); reader.read("parts/anchor.step",function(err) { if (err) { console.log("failure :" + err); return; } var product_definitions = reader.getObjects("PRODUCT_DEFINITION"); reader.dumpStatistic(); });assembly ├─┬ 20838 SDR:'Placement #0' │ ├─┬ used_representation = 20837 SHAPE_REPRESENTATION │ │ └─┬ MAPPED_ITEM:20816 ADVANCED_BREP_SHAPE_REPRESENTATION │ │ ├── 20815 AXIS2_PLACEMENT_3D │ │ └── 20803 MANIFOLD_SOLID_BREP │ ├── relating = 'ANCORA_1550_ASM' │ └── related = 'MARRA' ├─┬ 21168 SDR:'Placement #1' │ ├─┬ used_representation = 21167 SHAPE_REPRESENTATION │ │ └─┬ MAPPED_ITEM:21152 ADVANCED_BREP_SHAPE_REPRESENTATION │ │ ├── 21151 AXIS2_PLACEMENT_3D │ │ └── 21139 MANIFOLD_SOLID_BREP │ ├── relating = 'ANCORA_1550_ASM' │ └── related = 'PERNO_PER_MARRE' ├─┬ 24353 SDR:'Placement #2' │ ├─┬ used_representation = 24352 SHAPE_REPRESENTATION │ │ └─┬ MAPPED_ITEM:24336 ADVANCED_BREP_SHAPE_REPRESENTATION │ │ ├── 24335 AXIS2_PLACEMENT_3D │ │ ├── 21331 MANIFOLD_SOLID_BREP │ │ └── 24323 MANIFOLD_SOLID_BREP │ ├── relating = 'ANCORA_1550_ASM' │ └── related = 'FUSO' ├─┬ 25287 SDR:'Placement #3' │ ├─┬ used_representation = 25286 SHAPE_REPRESENTATION │ │ └─┬ MAPPED_ITEM:25271 ADVANCED_BREP_SHAPE_REPRESENTATION │ │ ├── 25270 AXIS2_PLACEMENT_3D │ │ └── 25258 MANIFOLD_SOLID_BREP │ ├── relating = 'ANCORA_1550_ASM' │ └── related = 'CICALA_103' ├─┬ 20825 SDR:'' │ ├─┬ used_representation = 20816 ADVANCED_BREP_SHAPE_REPRESENTATION │ │ ├── 20815 AXIS2_PLACEMENT_3D │ │ └── 20803 MANIFOLD_SOLID_BREP │ └── definition PD:20823 'MARRA' ├─┬ 20826 SDR:'' │ ├─┬ used_representation = 20828 SHAPE_REPRESENTATION │ │ ├─┬ MAPPED_ITEM:20816 ADVANCED_BREP_SHAPE_REPRESENTATION │ │ │ ├── 20815 AXIS2_PLACEMENT_3D │ │ │ └── 20803 MANIFOLD_SOLID_BREP │ │ ├─┬ MAPPED_ITEM:21152 ADVANCED_BREP_SHAPE_REPRESENTATION │ │ │ ├── 21151 AXIS2_PLACEMENT_3D │ │ │ └── 21139 MANIFOLD_SOLID_BREP │ │ ├─┬ MAPPED_ITEM:24336 ADVANCED_BREP_SHAPE_REPRESENTATION │ │ │ ├── 24335 AXIS2_PLACEMENT_3D │ │ │ ├── 21331 MANIFOLD_SOLID_BREP │ │ │ └── 24323 MANIFOLD_SOLID_BREP │ │ ├─┬ MAPPED_ITEM:25271 ADVANCED_BREP_SHAPE_REPRESENTATION │ │ │ ├── 25270 AXIS2_PLACEMENT_3D │ │ │ └── 25258 MANIFOLD_SOLID_BREP │ │ └── 25299 AXIS2_PLACEMENT_3D │ └─┬ definition PD:25304 'ANCORA_1550_ASM' │ └─┬ nauos │ ├── 20823 'MARRA' │ ├── 21156 'PERNO_PER_MARRE' │ ├── 24341 'FUSO' │ └── 25275 'CICALA_103' ├─┬ 21158 SDR:'' │ ├─┬ used_representation = 21152 ADVANCED_BREP_SHAPE_REPRESENTATION │ │ ├── 21151 AXIS2_PLACEMENT_3D │ │ └── 21139 MANIFOLD_SOLID_BREP │ └── definition PD:21156 'PERNO_PER_MARRE' ├─┬ 24343 SDR:'' │ ├─┬ used_representation = 24336 ADVANCED_BREP_SHAPE_REPRESENTATION │ │ ├── 24335 AXIS2_PLACEMENT_3D │ │ ├── 21331 MANIFOLD_SOLID_BREP │ │ └── 24323 MANIFOLD_SOLID_BREP │ └── definition PD:24341 'FUSO' └─┬ 25277 SDR:'' ├─┬ used_representation = 25271 ADVANCED_BREP_SHAPE_REPRESENTATION │ ├── 25270 AXIS2_PLACEMENT_3D │ └── 25258 MANIFOLD_SOLID_BREP └── definition PD:25275 'CICALA_103' see also : http://www.steptools.com/support/stdev_docs/express/ap203/walkasm.html
to generate the EXPRESS parser with jison
$ node node_modules/jison/lib/cli.js express_parser.jison