RR. Block Model Custom Variables

Sometimes we want to map a block model field that isn't coded in the original block model. Custom variables allow us to write complex logic in a readable and reusable way, which can then be mixed with other inline formulas in the block model mappings.

To create a custom variable:

Go to Setup > Block Model > Edit > Reservable Model Generator.
Click Custom Variables to open the script editor.
Clear all text from the code editor.
Replace it with the sample code below.

Block model with inline formula

Custom variable editor

Dry Tonnes

using System; 
using System.Collections.Generic; 
using System.Text; 
using System.Linq; 
using Alastri.Scripting; 
using Alastri.BlockModel.Engine.CustomVariables;

public class DryTonnes : IDoubleCustomVariable
{
    public double GetNumber(CustomVariablesContext context)
    {
        double density = context.N("DENSITY");

        double volume = context.N("XINC")*context.N("YINC")*context.N("ZINC");
        
        return (density > 0 ? density * volume : 0);
        
    }
}

Grade bins

using System;
using System.Collections.Generic;
using System.Text;
using System.Linq;
using Alastri.Scripting;
using Alastri.BlockModel.Engine.CustomVariables;

public class Parcel : ITextCustomVariable
{
    public string GetText(CustomVariablesContext context)
    {
        double fe = context.N("fe");
        
        if(fe > 60)        return "hg";
        else if(fe > 58)   return "mg";
        else if(fe > 57.5) return "lg1";
        else if(fe > 56)   return "lg2"; 
        else if(fe > 50)   return "minw";
        else               return "w";

    }
}

Multiple Grade Bins

using System;
using System.Collections.Generic;
using System.Text;
using System.Linq;
using Alastri.Scripting;
using Alastri.BlockModel.Engine.CustomVariables;

public class Parcel : ITextCustomVariable
{
    public string GetText(CustomVariablesContext context)
    {
        double fe = context.N("fe");
        double al = context.N("al");
        string geology = context.T("geology");
        
        string fe_bin;
        
        if(fe > 60) 
        {
             fe_bin = "60";
        }
        else if(fe > 55) 
        {
            fe = Math.Floor(fe); 
            fe_bin = fe.ToString("#,##0");
        }
        else
        {
           fe_bin = "50";
        }

        string al_bin;

        if(al < 3)
        {
           al_bin = "3";
        }
        else if(al < 6)
        {
           al = Math.Ceil(al);
           al_bin = al.ToString("#,##0");
        }
        else
        {
          al_bin = "9";
        }

        string geoClass = "1";
        if(geology.Equals("detrital", StringComparison.OrdinalIgnoreCase))
        {
           geoClass = "2";
        }

        return fe_bin + "_" + al_bin + "_" + geoClass;
    }
}

Ore Ratio

Rapid Reserver block model fields cannot report Stripping Ratio, because Stripping Ratio is not a sum or weight average type field. Instead, we can report ore ratio, which is the weight average of ore tonnes over total tonnes.

To do this we can set up a weight-averaged field called OreRatio as a child of "dryTonnes" or "wetTonnes" (whichever you want to report). This field will report a "1" for ore and a "0" for waste. The weight average of the 1s and 0s across a blast becomes the ore ratio.

Ore Ratio

Multiple Custom Variables

To create multiple custom variables, a class implementing the IDoubleCustomVariable or ITextCustomVariable interface needs to be created for each variable. These classes need to be listed under one another in the Custom Variables Script Editor, as shown in the examples below.

Multiple Custom Variables

Multiple variables with shared logic

Access Custom Variable from another Custom Variable

Access Custom Variable values from another Custom Variable

If there are no errors during compilation, the custom variables should be listed in the Variables panel.