[osg-users] using modern shaders with osg - setting vertex attribute layout

[antiro black]

Hi Sebastian,

Thanks for the quick response. The osg_XXX matrices work perfectly. The setUseVertexAttributeAliasing() however does not seem to work. Where I had some output before, now don't get anything with it enabled

Does osg always give the exact layout which you posted? or is this dependent on the data that is loaded? 

for refence, here is a stripped down version of a geometry pass which I'm currently testing with (all 3 outputs are black with the attributeAliasing turned on):


Code:
#version 330 core
layout (location = 0) in vec4 position;
layout (location = 1) in vec3 normal;
layout (location = 2) in vec4 color;
layout (location = 3) in vec4 texCoords;

/*OSG input layout
layout(location = 0) in vec4 osg_Vertex;
layout(location = 1) in vec3 osg_Normal;
layout(location = 2) in vec4 osg_Color;
layout(location = 3)in vec4 osg_MultiTexCoord0;
layout(location = 4)in vec4 osg_MultiTexCoord1;*/

out vec3 Normal;
out vec2 TexCoords;
out vec3 WorldPos;

uniform mat4 osg_ModelViewMatrix;
uniform mat3 osg_NormalMatrix;
uniform mat4 osg_ProjectionMatrix;


void main()
{
    gl_Position = osg_ProjectionMatrix * osg_ModelViewMatrix * position;
    WorldPos = (osg_ModelViewMatrix * position).xyz;
    Normal = osg_NormalMatrix * normal;
    TexCoords = texCoords.xy;
}



and the fragment shader:

Code:
#version 330

in vec2 TexCoords;
in vec3 Normal;
in vec3 WorldPos;

layout (location = 0) out vec3 gWorldPos;
layout (location = 1) out vec4 gColorSpec;
layout (location = 2) out vec3 gNormalOut;

uniform vec3 gDiffuseColor=vec3(1,0,0);

void main()
{
    gWorldPos = WorldPos;
    gColorSpec.rgb=gDiffuseColor;
    gNormalOut = normalize(Normal);
}



For the actual creation and compilation of the shader program I'm using the EffectCompositor recipe from the OSG cookbook.

Thank you!

Cheers,
antiro[/code]

------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=71586#71586