Values from Mesh Array Metadata

Questions
1

Hello everyone,

In the PG below, I’m attempting to retrieve the highest metadata value from an array of meshes. I researched JavaScript tutorials, and this seems relatively easy for a standard array using Math.max(array). However, it doesn’t seem to work in this PG :thinking: Clicking on a mesh returns the sphere’s metadata “value,” and that doesn’t always match what Math.max returns.

https://www.babylonjs-playground.com/#4UUDKU#5

2

Math.max takes two or more parameters and returns the maximum of the values.

In your PG, you pass a single parameter, so it will always return this value.

I have updated your PG:

https://www.babylonjs-playground.com/#4UUDKU#6

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3

In this line

var mostValue = Math.max(sphereArray[i].metadata.value.toFixed(0));

Math.max is not being fed an array, it is only being fed a single value which is of course its own max value.

You could use

var mostValue = -Infinity;
for (var i = 0; i < sphereArray.length; i++)  {
        mostValue = Math.max(sphereArray[i].metadata.value.toFixed(0), mostValue);  
};
text2.text = mostValue.toString();

or

var mostValue = Math.max(...sphereArray.map((entry) => entry.value.toFixed(0));
text2.text = mostValue.toString();

Have rearranged your GUI so it is viewable https://www.babylonjs-playground.com/#4UUDKU#7

See spread operatorfor the use of …

I see @Evgeni_Popov beat me to it while I was doing the PG :slightly_smiling_face:

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4

Thanks @JohnK and @Evgeni_Popov for the explanations and the PG corrections, I really appreciate it.

I see now that a range has to be set.

Thanks again! :smiley: :+1:

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