Making an HLSL switch case for UDK?

Coexistence · Jun 2013

I'm learning HLSL and I was hoping to use it to help me make a material in UDK. I'm trying to get a simple switch case to work in a custom material node, and even though I'm using the official HLSL reference, I can't seem to get it to work.

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Drew++ · Jun 2013

what kind of error are you getting? Your code looks solid. You could alternatively try this.

    float4 finalValue = 0.0f; // The default value is now here.

    switch (indexNum)
    {
    case 0: 
        finalValue = 0.25f;
        break;
        
    case 1: 
        finalValue = 0.5f;
        break;
        
    case 2: 
        finalValue = 1.0f;
        break;
    }

    return finalValue;

Also try changing the default value from {0,0,0,0}; to simply

float4 defaultValue = 0.0;
float4 case1Value = 1.0;

Coexistence · Jun 2013

I'm not getting any errors, but it won't return anything but the default.

I plugged in your code and it seems to work. It might be because I didn't have decimal points in my float? Do I need the "f" after a float value?

Vailias · Jun 2013

its probably the break statements he included.

Drew++ · Jun 2013

Vailias wrote: »

its probably the break statements he included.

No... Definitely works on my end :P

Here it is slightly different, in case you want 0 to be the default value...

    float4 finalValue = 0.0f; // The default value is now here.

    switch (indexNum)
    {       
    case 1:
        finalValue = 0.25f;
        break;
        
    case 2:
        finalValue = 0.5f;
        break;

    case 3:
        finalValue = 0.75f;
        break;
    }

    return finalValue;

And no, you don't need the decimal or the 'f' at the end. It's just a habit I have carried over from programming :P

Making an HLSL switch case for UDK?

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