Merge lines

[ovmihai]

Hello guys,

Is there any options to merge lines in on mesh? I saw that there is a function MergeMeshes and it works great but for lines? 

 

Thank you

[Dad72]

I tried to merge the lines and I received an error. I do not think that the lines can be merged for now or it may be a bug.

[jerome]

AFAIK only meshes can be merged

But I've in mind to implement a Line System (morphable of course), in which the user will be able to merge lines, make grids, etc, etc

[Dad72]

cool 

[RaananW]

A wonderful question for the new Q&A sub category

[ovmihai]

So..is there any option to reduce the number of lines when drawing a ruler ? (See attached image) Thank you.

[jerome]

not for now...

I think I will start the Line System for the BJS v2.4

[Dad72]

@jerome I come to take news about this new feature that you wanted to do. Is it available in 2.5 ?

Thanks Jerome

[jerome]

yes it is : http://doc.babylonjs.com/tutorials/Mesh_CreateXXX_Methods_With_Options_Parameter#linesystem

[Dad72]

Cool, thanks

[Dad72]

I can not create a grid. I'm not sure how to do it.

		for (var i1 =-50; i1 <= 50; i1++) {
			this.lines.push(new BABYLON.Vector3(i1, 0, -50));
			this.lines.push(new BABYLON.Vector3(i1, 0, 50));
		}
		for (var i2 =-50; i2 <= 50; i2++) { 
			this.lines.push(new BABYLON.Vector3(-50, 0, i2));
			this.lines.push(new BABYLON.Vector3(50, 0, i2));
		}
		
		var lineSystem = BABYLON.MeshBuilder.CreateLineSystem("lineSystem", {lines: this.lines}, global.scene);	
		lineSystem = BABYLON.MeshBuilder.CreateLineSystem(null, {lines: this.lines, instance: lineSystem});

Previously I made it work like this:

http://www.babylonjs-playground.com/#2K1IS4#11

Thanks Jerome

[Dad72]

Ok, I understood the operation:

var _lines = [];
for (var i1 =-50; i1 <= 50; i1++) {
	_lines.push([new BABYLON.Vector3(i1, 0, -50), new BABYLON.Vector3(i1, 0, 50)]);
}
for (var i2 =-50; i2 <= 50; i2++) { 
	_lines.push([new BABYLON.Vector3(-50, 0, i2), new BABYLON.Vector3(50, 0, i2)]);
}
		
var lineSystem = BABYLON.MeshBuilder.CreateLineSystem("lineSystem", {lines: _lines}, scene);	
lineSystem = BABYLON.MeshBuilder.CreateLineSystem(null, {lines: _lines, instance: lineSystem});

lineSystem.isPickable = false;

Works perfectly well.

This feature is great.

Demo: http://www.babylonjs-playground.com/#2K1IS4#12

[jerome]

you can search also the PG serach engine with "LineSystem", there should be many working examples

 

about your example, you don't need to call CreateLineSystem() twice : http://www.babylonjs-playground.com/#2K1IS4#13

the second call is needed only if you want to morph (dynamically update) the existing line system