GLSL Object Space Normal Map Shader (Solved)

[Klunk]

out of interest has anyone managed to create one for irrlicht ? Though I've got a perfectly good tangent space version I was looking to get one working but it doesn't seem to be working correctly. The map is create in max and the fx shader I use in max works well but trying to replicate that in GLSL within irrlicht is proving problematic.

[The_Glitch]

Are you asking for a shader or perhaps a link to some information so you can maybe find what's wrong with your shader?


http://www.google.com/url?sa=t&rct=j&q= ... 0829,d.eXY

[Klunk]

yep I've seen that, i'm not animating the object and using a directional light, I was really after a yes or no.

but for what it's worth this would be the glsl shader equivalent to what I'm doing in max with hlsl shader (which works entirely as expected)

.vert

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uniform int  light;
 
varying vec3 lightdir; 
 
void main(void)
{
    gl_Position = ftransform();
    gl_TexCoord[0] = gl_MultiTexCoord0;
    lightdir = normalize(gl_ModelViewMatrixInverse * gl_LightSource[light].position).xyz;
    gl_FrontColor = gl_Color;  // pass vertex colour to the fragment shader 
}

.frag

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uniform int  light;
uniform vec4 ka;            
uniform vec4 kd;
varying vec3 lightdir;
 
uniform sampler2D diffmap;
uniform sampler2D normmap;
 
void main(void)
{
    vec4 diffuse = texture2D(diffmap, gl_TexCoord[0].xy);
    vec3 N = 2.0 * (texture2D(normmap,gl_TexCoord[0].xy).xyz - 0.5);
    float lambert = 0.5 * dot( normalize(lightdir),N.xyz) + 0.5;
    gl_FragColor = diffuse * (ka + kd * lambert * lambert) * gl_Color * gl_LightSource[light].diffuse;
    gl_FragColor.a = diffuse.a;                      
}

I've done some further tests (created a flat shader where the light is transformed into object space as above and I use the actual object normals to compute the lighting, which works) so it must be something todo with normal map or how it's handled

solved it....

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vec3 N = normalize(2.0 * (texture2D(normmap,gl_TexCoord[0].xy).xzy - 0.5));

I had previously tried the yz swap but without the normalize hey ho