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

[antiro black]

Hi Sebastian,

I was under the impression that the "layout(...) in ..." command was essentially a variable declaration and that hence only the location and type needed to match. I now also changed the name, this does not seem to have any effect though..

new vertex shader code:

Code:
#version 330 core
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;
layout(location = 5)in vec4 osg_MultiTexCoord2;
layout(location = 6)in vec4 osg_MultiTexCoord3;
layout(location = 7)in vec4 osg_MultiTexCoord4;
layout(location = 8)in vec4 osg_MultiTexCoord5;
layout(location = 9)in vec4 osg_MultiTexCoord6;
layout(location = 10)in vec4 osg_MultiTexCoord7;

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 * osg_Vertex;
    WorldPos = (osg_ModelViewMatrix * osg_Vertex).xyz;
    Normal = osg_NormalMatrix * osg_Normal;
    TexCoords = osg_MultiTexCoord0.xy;

}



If I use the shader without the UseVertexAttributeAliasing enabled I see red silhouettes for the different models, when looking at the normals texture output (as if all normals are <1,0,0> ), which I expect is caused by the shader reading wrong  on unitialized attributes.

with UseVertexAttributeAliasing enabled I get no output.



Thank you!

Cheers,
antiro

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http://forum.openscenegraph.org/viewtopic.php?p=71588#71588