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[Hedgehodg]

In the Wikibook for Open GL 2.1 I am having issues with the first tutorial for the lighting arc, the author doesn't explain what half the "stuff" is used for. For example, what am I meant to pass to the following function?

Code:

glm::mat3 m_3x3_inv_transp = glm::transpose(glm::inverse(glm::mat3(mesh.object2world)));
glUniformMatrix3fv(uniform_m_3x3_inv_transp, 1, GL_FALSE, glm::value_ptr(m_3x3_inv_transp));

Throughout all the tutorials a "mesh" structure/class is never created. Does anyone know what I should pass to the glm::mat3 function in "mesh.object2world"s stead?

http://en.wikibooks.org/wiki/GLSL_Programming/GLUT/Diffuse_Reflection

[Liosan]

There's a comment right above that:

Code:

 /* Transform normal vectors with transpose of inverse of upper left
     3x3 model matrix (ex-gl_NormalMatrix): */

You need the model matrix for the mesh you are currently rendering; as in, the matrix representing the meshes translation, rotation and scaling.

Liosan

[Hedgehodg]

Thanks

[Hedgehodg]

I was wondering if anyone could help me with this: http://gamedev.stackexchange.com/questions/33156/lighting-problems-with-terrain ... Please