Re: [Glsdk-devel] [GLm] api

[Andrew G. <and...@gm...>]

Just glancing at GLM src and noticed in glmMatDeterm4f that assert(m) should
be assert(m_).

pudman

On Tue, Aug 26, 2008 at 10:24 AM, Henri Häkkinen <hen...@gm...> wrote:

> Okay.
>
> I think I can say that the GLM API is more or less "set". This does not
> mean that there won't be any additions or modifications to it but the
> general look of it is fine with me and it has been open for discussion for
> some time. So if Korval could at some point take it to his tasks to write
> the API reference outline in DocBook which I could fill in with the actual
> docs. The 'docs/sdk_reference/glm-apiref' file may also be removed in the
> process.
>
>
> On Tue, Aug 26, 2008 at 5:16 PM, Henri Häkkinen <hen...@gm...>wrote:
>
>> Okay I see what you mean by that. However I think our mathlib is intended
>> mainly to be used for OpenGL (a matrix based system), so mul and div feels a
>> bit redundant atm.
>>
>>
>> On Tue, Aug 26, 2008 at 1:20 AM, <gl...@mo...> wrote:
>>
>>> > What do you mean 'mathematical operations or software operations'?
>>>
>>> In math we can graphically represent vectors as arrows pointing form
>>> (point A to B. It's hard to imagine how we could visualize Mul operation
>>> in such form.
>>>
>>> In graphics library we often use vectors to represent size or other
>>> things. Especially when comes to 2D rendering, transforming vectors by
>>> means of Add/Mul is more common than transforming my multiplying (x, y,
>>> 1.0) vector by 3x3 matrix for the sake of both simplicity and
>>> performance.
>>>
>>> Even in 3D space. Imagine a volume defined as a box with origin at point
>>> A
>>> and a size of S. If point B lays within this box then C = (B - A) / S
>>> gives texture-space coordinate for point B. An alternative would be to
>>> define a 4x4 transformation matrix that transforms point B into texture
>>> space. Such matrix would be defined as conjunction of glmMatTranslate and
>>> glmMatScale.
>>>
>>>
>>> These are the kind of examples showing that even if something is useless
>>> in math, it's useful in programming.
>>> Sorry for speaking in riddles the first time ;)
>>>
>>> It's bed time for me. Cheers.
>>>
>>>
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>>
>>
>>
>> --
>> Henri 'henux' Häkkinen
>>
>>
>
>
> --
> Henri 'henux' Häkkinen
>
>
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