[x3d-public] JSON to STL. Function bounties.

[John Carlson]

Yes, I agree that one needs the indexes into the  mesh in order move the
point and normal.   The only problem i can think of is one may not have a
proper coordinate system for the mesh when it’s defined as a point with
radius 8.  There may be more appropriate maps to be more sphere like.
Thus, Blender and IFS in a non-grid.  Yet one still has a coordinate system
for bending, etc.

John

On Tue, Dec 20, 2022 at 4:59 PM Joseph D Williams <joedwil at earthlink.net>
wrote:

>
>
>    - My approach i am considering taking is:  first, choosing a set of
>    flat meshes to cover sphere, cone, cylinder, generically. After that, we
>    can cover more complicated meshes like extrusions, 2D geometry and NURBS
>    geometry
>
>
>
> John,
>
> Right, in thinking of flat meshes relating to other geometry, I was just
> thinking about texture mapping, where we somehow tell how to map a 2D
> planar to a 3D object.
>
> Texture coordinates are a field of the geometry that tell which coordinate
> of the 2D will be applied to which coordinate of the 3D.
>
>
>
> When generating mesh think of the animation where the author may need to
> know the index of  a point to animate. This animation may depend upon a
> certain level of point resolution, and that certain features are
> consistently located within the mesh.
>
>
>
> Thanks,
>
> Joe
>
>
>
>
>
>
>
>
>
> *From: *John Carlson <yottzumm at gmail.com>
> *Sent: *Tuesday, December 20, 2022 1:37 PM
> *To: *Christoph Valentin <christoph.valentin at gmx.at>; X3D Graphics public
> mailing list <x3d-public at web3d.org>
> *Subject: *Re: [x3d-public] JSON to STL. Function bounties.
>
>
>
> Current code is here:
>
>
>
> https://github.com/coderextreme/JsonToStl
>
>
>
> It’s a pretty clean project, no real build script (make.sh), needs more
> test cases.
>
>
>
> If you want to be a contributor, send me your email and specify your
> license of choice.  Code you work on should include your license in each
> source file you modify and the main LICENSE file.  If you want to create a
> python blender scripts to go from X3D to STL, that will be cool too.  I
> don’t want a lot of confusion about which IDE to use.   I use vim.  Use
> what you like, but don’t create a lot of dependencies, instead use some you
> didn’t install like easy to read make.bat file to pair with make.sh.
>
>
>
> Remember there’s Git Bash, so you can assume bash will be on the system
> that git uses.
>
>
>
> My approach i am considering taking is:  first, choosing a set of flat
> meshes to cover sphere, cone, cylinder, generically. After that, we can
> cover more complicated meshes like extrusions, 2D geometry and NURBS
> geometry
>
>
>
> So i think that sphere might be a grid mesh, cylinder would be 3 meshes,
> and cone is 3 meshes.
>
>
>
> My plan is to do sphere first, since that will cover my use case.
>
>
>
> John
>
>
>
> On Tue, Dec 20, 2022 at 2:58 PM John Carlson <yottzumm at gmail.com> wrote:
>
> Wondering, is an X3dToStl.xslt code development  planned soon?
>
>
>
> The other thing i can work on is continuing JSON to Python conversion.
>
>
>
> Is there something i can write that i will use on a regular basis?
>
>
>
> Christoph Valentin, what’s the  preferred multiuser web software for X3D?
>
>
>
> Would syntax highlighting for vim and/or neovim be useful?
>
>
>
> John
>
>
>
> On Tue, Dec 20, 2022 at 6:17 AM John Carlson <yottzumm at gmail.com> wrote:
>
> Here are the functions that are planned or implemented in JsonToStl.
> Please express which ones you'd like to see implemented next.
>
>
>
> Thanks!
>
>
>
> Also, please discuss what type of LICENSE would be required. If at all
> possible, I'd like to make some money off this, perhaps by setting up a
> conversion website or patreon.
>
>
>
> Yes, I'm aware of the STL output in Blender! I'm working on this to
> enhance X3DJSONLD.  Is conversion to STL still desired?
>
>
>
> Thanks,
>
> John
>
>
>
> function convertJsonToStl(json) {
>
> function initializeLDNode(json, obj) {
>
> function findLDNodeInList(use, LDNodeList) {
>
> function toNormals(json, LDNodeList, ParentNode) {
>
>                 IndexedFaceSet : function(obj, LDNode) {
>
>                 Group : function(obj, LDNode) {
>
>                 Shape : function(obj, LDNode) {
>
>                 Box : function(obj, LDNode) {
>
>                 IndexedTriangleSet : function(obj, LDNode) {
>
>                 IndexedTriangleStripSet : function(obj, LDNode) {
>
>                 IndexedTriangleFanSet : function(obj, LDNode) {
>
>                 IndexedLineSet : function(obj, LDNode) {
>
>                 Normal : function(obj, LDNode) {
>
>                 Coordinate : function(obj, LDNode) {
>
>                 Transform : function(obj, LDNode) {
>
>                 "@scale" : function(obj, LDNode) {
>
>                 "@rotation" : function(obj, LDNode) {
>
>                 "@translation" : function(obj, LDNode) {
>
>                 "@normalPerVertex" : function(obj, LDNode) {
>
>                 "@size" : function(obj, LDNode) {
>
>                 "@vector" : function(obj, LDNode) {
>
>                 "@point" : function(obj, LDNode) {
>
>                 "@normalIndex" : function(obj, LDNode) {
>
>                 "@coordIndex" : function(obj, LDNode) {
>
>                 "@index" : function(obj, LDNode) {
>
> function vector_product(u, v) {
>
> function normalize(v) {
>
> function triangle_normal(a, b, c) {
>
> function printNormal(prefix, x, y, z, output, transform) {
>
> function printSFVec3f(prefix, x, y, z, output, transform) {
>
> function IndexedTriangle(LDNode, output, transform) {
>
> function transformLDNodesToTriangles(LDNode, output, parentTransform) {
>
>                 IndexedFaceSet: function(LDNode, output, transform) {
>
>                 Box: function(LDNode, output, transform) {
>
>                 SixSided: function(LDNode, output, transform, x, y, z) {
>
>                 Square: function(LDNode, output, transform, square) {
>
>                 Triangle: function(LDNode, output, transform, coords) {
>
>
>
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