Re: Parameters messed up in Custom Kernel (solved)

• Subject: Re: Parameters messed up in Custom Kernel (solved)
• From: Bjoern Kriews <email@hidden>
• Date: Thu, 18 Aug 2005 15:47:16 +0200
• Delivered-to: email@hidden
• Delivered-to: email@hidden

On 18.08.2005, at 14:51, Bjoern Kriews wrote:

> float parameters messed up when using ternery operator

I rewrote my kernels using compare() instead of the ternary operator.
That fixed the weirdness.

I think this is a bug and Michel Schinz already reported it.
This one ruined my first impression of QC and cost me a couple of days
I could have spent otherwise.

Pierre, does it make sense to report it again to increase priority ?

To whom it may concern, here are the rewritten kernels / compositions.

File: realParameterpostCompare.qtz

kernel vec4 blackMask(sampler image, float minLevel)
{
    __color t = sample(image, samplerCoord(image));

    float v = ( t.r + t.g + t.b) / 3.0;

    return vec4(compare( v - minLevel, 1.0, 0.0));
    //return v < minLevel ? vec4(1.0) : vec4(0.0);
}

------------

File: parameterInfluencePostCompare.qtz

kernel vec4 blackImage(sampler image, float minLevel)
{
    __color t = sample(image, samplerCoord(image));

    float v = ( t.r + t.g + t.b) / 3.0;
    float delta = v - minLevel;

    return compare( vec4(delta,delta,delta,1.0), vec4(1.0,0,0,1.0), t);
    // return v < minLevel ? vec4(1.0,0,0,1.0) : t;
}

Attachment: parameterInfluencePost.qtz
Description: application/quartzcomposer

Attachment: realParameterPostCompare.qtz
Description: application/quartzcomposer

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