[x3d-public] Adding LineSets in SAI, X_ITE

[John Carlson]

With a little debugging suggestion help, I was able to discover the issue.
Not that I would have expected this.

See in the log the vertexCount is an empty object, whereas in the code,
it's assigned the number 2.

Weird!

This very plainly states that vertex count is an MFInt32:

https://www.web3d.org/specifications/X3dSchemaDocumentation4.0/x3d-4.0_LineSet.html#Link523

I guess I can go with that.  I hope for the best!

John

LOG:


X3D Scene LineSet created
{"source":[30.291999999999994,-40.05699999999999,-3.468],"target":[28.520000000000003,-31.125000000000007,0],"vertexCount":{},"hasCoord":true}

Current code:


const addLinkTransform = function(link, sourceNode, targetNode) {
        const shape = Browser.currentScene.createNode('Shape');
        const appearance = Browser.currentScene.createNode('Appearance');
        const material = Browser.currentScene.createNode('Material');
        const linkTransform = Browser.currentScene.createNode('Transform');
        Browser.currentScene.addNamedNode('trans'+link, linkTransform);

        material.diffuseColor = new SFColor(0.0, 0.0, 1.0);
        material.emissiveColor = new SFColor(0.0, 0.0, 1.0);
        appearance.material = material;
        const lineSet = Browser.currentScene.createNode('LineSet');
        const coordinate = Browser.currentScene.createNode('Coordinate');
        if (coordinate && typeof sourceNode.x !== 'undefined') {
                coordinate.point = new MFVec3f(
                        new SFVec3f(sourceNode.x, sourceNode.y,
sourceNode.z),
                        new SFVec3f(targetNode.x, targetNode.y,
targetNode.z));
        }
        Browser.currentScene.addNamedNode('point'+link, coordinate);
        lineSet.coord = coordinate;
*        lineSet.vertexCount = 2;*
        shape.appearance = appearance;
        shape.geometry = lineSet;
        addChild(linkTransform, shape);
        LOG("LineSet created", JSON.stringify({
          source: [sourceNode.x, sourceNode.y, sourceNode.z],
          target: [targetNode.x, targetNode.y, targetNode.z],
*          vertexCount: lineSet.vertexCount,*
          hasCoord: lineSet.coord !== null
        }));
        return linkTransform;
}

On Mon, Mar 31, 2025 at 12:24 AM John Carlson <yottzumm at gmail.com> wrote:

> I'm trying to add a LineSet in X_ITE with JavaScript, but it's not
> showing up:
>
> const addLinkTransform = function(link, sourceNode, targetNode) {
>         const shape = Browser.currentScene.createNode('Shape');
>         const appearance = Browser.currentScene.createNode('Appearance');
>         const material = Browser.currentScene.createNode('Material');
>         const linkTransform =
> Browser.currentScene.createNode('Transform');
>             Browser.currentScene.addNamedNode('trans'+link, linkTransform);
>
>         material.diffuseColor = new SFColor(0.0, 0.0, 1.0);
>         material.emissiveColor = new SFColor(0.0, 0.0, 1.0);
>         appearance.material = material;
>         const lineSet = Browser.currentScene.createNode('LineSet');
>         const coordinate = Browser.currentScene.createNode('Coordinate');
>         if (coordinate && typeof sourceNode.x !== 'undefined') {
>                 coordinate.point = new MFVec3f(
>                         new SFVec3f(sourceNode.x, sourceNode.y,
> sourceNode.z),
>                         new SFVec3f(targetNode.x, targetNode.y,
> targetNode.z));
>         }
>         lineSet.vertexCount = 2;
>         Browser.currentScene.addNamedNode('point'+link, coordinate);
>         lineSet.coord = coordinate;
>         shape.appearance = appearance;
>         shape.geometry = lineSet;
>         addChild(linkTransform, shape);
>         return linkTransform;
> }
>
> const addChild = function(node, value) {
>         node.children.push(value);
> }
>
> Then my main code:
>
>
>                 const sourceNode = nodes.find(n => n.id === command[3]);
>                 const targetNode = nodes.find(n => n.id === command[4]);
>                 let sql = command[2];
>                 let link = command[3]+command[4];
>                 if (sourceNode && targetNode) {
>                   let linkGroup =
> Browser.currentScene.getNamedNode('linkGroup');
>                   let linkTransform = null;
>                   try {
>                         linkTransform =
> Browser.currentScene.getNamedNode('trans'+link);
>                   } catch (e) {
>                   }
>                   if (linkTransform === null) {
>                         linkTransform = addLinkTransform(link, sourceNode,
> targetNode);
>                         if (linkTransform !== null &&
> !linksShapes[`${sourceNode.id}-${targetNode.id}-${link}`]) {
>
> linksShapes[`${sourceNode.id}-${targetNode.id}-${link}`] = linkTransform;
>                                   if (linkGroup !== null) {
>                                         addChild(linkGroup, linkTransform);
>                                         LOG("SUCCESSFUL LINK", link,
> sourceNode.id, targetNode.id);
>                                   } else {
>                                         LOG("FATAL LINK", link);
>                                   }
>                         }
>                   }
>                   if (sql === 'UPDATE') {
>                           let coordinate =
> Browser.currentScene.getNamedNode('point'+link);
>                           if (coordinate) {
>                                   if (typeof sourceNode.x !== 'undefined')
> {
>                                         coordinate.point = new MFVec3f(
>                                                         new
> SFVec3f(sourceNode.x, sourceNode.y, sourceNode.z),
>                                                         new
> SFVec3f(targetNode.x, targetNode.y, targetNode.z));
>                                         // LOG("SUCCESSFUL COORDINATE",
> link, coordinate.point);
>                                   } else {
>                                         LOG("FATAL COORDINATE", link,
> `${sourceNode.id} ${sourceNode.x} ${sourceNode.y} ${sourceNode.z},
> ${targetNode.id} ${targetNode.x} ${targetNode.y} ${targetNode.z}`);
>                                   }
>
>                           } else {
>                                 LOG("COULDN'T FIND COORDINATE", link)
>                           }
>
>                   }
>
>
> Note that the JavaScript is referenced from a Script node in a
> ProtoBody,and the linkGroup node is there as well.  What I'll probably do
> is create a very simple example soon.
>
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