[GEM-dev] vertexbuffer attribute

[Cyrille Henry]

Le 05/07/2015 22:55, Jack a écrit :
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> Hello Cyrille,
>
> You can't use color, texture or normal to pass your attributes (maybe
> it is not enough) ?
i use that, and i want more!
since there is an example describing how to do it, i would expect this functionality to work...

cheers
c

> ++
>
> Jack
>
>
>
> Le 05/07/2015 22:50, Cyrille Henry a écrit :
>> hello,
>>
>> i've got a problem using vertexbuffer attribute : dimension is set
>> to a wrong value.
>>
>> when using the example 10.glsl/16.vertexbufer_attribute,
>> "print_attributes" gives :
>>
>> vb: program 0.5 vb: position 1003_position vb: attribute
>> LightPosition 1003_LightPosition vb: attribute BrickColor
>> 1003_BrickColor vb: attribute MortarColor 1003_MortarColor vb:
>> attribute BrickSize 1003_BrickSize vb: attribute BrickPct
>> 1003_BrickPct [gemvertexbuffer]: GLSL-ProgramID: 3
>> [gemvertexbuffer]: Attribute1: LightPosition [gemvertexbuffer]:
>> size: 48 [gemvertexbuffer]:     dimen: 2 [gemvertexbuffer]:
>> program_index: 1 [gemvertexbuffer]: Attribute2: BrickColor
>> [gemvertexbuffer]:     size: 48 [gemvertexbuffer]:     dimen: 3
>> [gemvertexbuffer]:     program_index: 3 [gemvertexbuffer]:
>> Attribute3: MortarColor [gemvertexbuffer]:     size: 48
>> [gemvertexbuffer]:     dimen: 3 [gemvertexbuffer]:
>> program_index: 4 [gemvertexbuffer]: Attribute4: BrickSize
>> [gemvertexbuffer]:     size: 32 [gemvertexbuffer]:     dimen: 3
>> [gemvertexbuffer]:     program_index: 5 [gemvertexbuffer]:
>> Attribute5: BrickPct [gemvertexbuffer]:     size: 32
>> [gemvertexbuffer]:     dimen: 4 [gemvertexbuffer]:
>> program_index: 6 vb: print_attributes
>>
>> in the shader code : attribute vec3 LightPosition; attribute vec3
>> BrickColor, MortarColor; attribute vec2 BrickSize, BrickPct;
>>
>>
>> so LightPosition is declare a vec3, but dimen is 2, BrickSize is
>> declare a vec2 and dimen is 3, BrickPct is declare as vec2 and
>> dimen is 4.
>>
>> when adding a float attribute, I have : vb: program 0.5 vb:
>> position 1003_position vb: attribute LightPosition
>> 1003_LightPosition vb: attribute BrickColor 1003_BrickColor vb:
>> attribute MortarColor 1003_MortarColor vb: attribute BrickSize
>> 1003_BrickSize vb: attribute BrickPct 1003_BrickPct vb: attribute
>> test 1003_test [gemvertexbuffer]: GLSL-ProgramID: 3
>> [gemvertexbuffer]: Attribute1: LightPosition [gemvertexbuffer]:
>> size: 48 [gemvertexbuffer]:     dimen: 2 [gemvertexbuffer]:
>> program_index: 1 [gemvertexbuffer]: Attribute2: BrickColor
>> [gemvertexbuffer]:     size: 48 [gemvertexbuffer]:     dimen: 3
>> [gemvertexbuffer]:     program_index: 3 [gemvertexbuffer]:
>> Attribute3: MortarColor [gemvertexbuffer]:     size: 48
>> [gemvertexbuffer]:     dimen: 3 [gemvertexbuffer]:
>> program_index: 4 [gemvertexbuffer]: Attribute4: BrickSize
>> [gemvertexbuffer]:     size: 32 [gemvertexbuffer]:     dimen: 1
>> [gemvertexbuffer]:     program_index: 5 [gemvertexbuffer]:
>> Attribute5: BrickPct [gemvertexbuffer]:     size: 32
>> [gemvertexbuffer]:     dimen: 3 [gemvertexbuffer]:
>> program_index: 6 [gemvertexbuffer]: Attribute6: test
>> [gemvertexbuffer]:     size: 16 [gemvertexbuffer]:     dimen: 4
>> [gemvertexbuffer]:     program_index: 7 vb: print_attributes
>>
>> strange...
>>
>>
>> anyhow, the result of the example 16 is not right : texture is
>> distorted.
>>
>>
>>
>> - is this example working for anyone? (i test with ubuntu 14.04 /
>> nvidia and intel gpu) - is this example used to work for anyone? -
>> can it be fixed? (i tried, but did not understand where the
>> m_attribute.size() was set - maybe the problem is that it's never
>> set!!!)
>>
>>
>> my current project is halted because of this problem. any help will
>> be appreciated.
>>
>> cheers c
>>
>> _______________________________________________ GEM-dev mailing
>> list GEM-dev at lists.iem.at
>> http://lists.puredata.info/listinfo/gem-dev
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