So, here is the structure I upload with VBO:
struct MeshVert {
vec3 position; /**< Vertex position. */
vec3 normal; /**< Vertex normal. */
vec2 UV; /**< UV coordinates. */
vec2 lightmapUV; /**< UV coordinates for the lightmaps. */
vec3 tangent; /**< Tangent of the vertex. */
vec3 biTangent; /**< bitangent of the vertex. */
};
And when I try to pass everything and draw I use:
glBindBufferARB(GL_ARRAY_BUFFER_ARB, 1);
size_t offset = 0;
offset = offsetof(MeshVert, position);
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(3, GL_FLOAT, sizeof(MeshVert), 0);
offset = offsetof(MeshVert, normal);
glEnableClientState(GL_NORMAL_ARRAY);
glNormalPointer(GL_FLOAT, sizeof(MeshVert), (void*)offset);
offset = offsetof(MeshVert, UV);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glClientActiveTextureARB(GL_TEXTURE0);
glTexCoordPointer(2, GL_FLOAT, sizeof(MeshVert), (void*)offset);
offset = offsetof(MeshVert, lightmapUV);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glClientActiveTextureARB(GL_TEXTURE1);
glTexCoordPointer(2, GL_FLOAT, sizeof(MeshVert), (void*)offset);
offset = offsetof(MeshVert, tangent);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glClientActiveTextureARB(GL_TEXTURE2);
glTexCoordPointer(3, GL_FLOAT, sizeof(MeshVert), (void*)offset);
offset = offsetof(MeshVert, biTangent);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glClientActiveTextureARB(GL_TEXTURE3);
glTexCoordPointer(3, GL_FLOAT, sizeof(MeshVert), (void*)offset);
int *indices = meshes[meshnumber]->meshTextureIndices[group]->indices;
glDrawElements(GL_TRIANGLES, (GLsizei)meshes[meshnumber]->meshTextureIndices[group]->numIndices, GL_UNSIGNED_INT, indices);
glClientActiveTextureARB(GL_TEXTURE3);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glClientActiveTextureARB(GL_TEXTURE2);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glClientActiveTextureARB(GL_TEXTURE1);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glClientActiveTextureARB(GL_TEXTURE0);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glDisableClientState(GL_NORMAL_ARRAY);
glDisableClientState(GL_VERTEX_ARRAY);
glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
But after drawing with my shader everything looks wrong, the diffuse component is wrong so my guess is that the tangents or bitangents are passed wrong (they are fine in MeshVert, I checked already), but if I replace the last code with the following the diffuse component looks right but the lightmaps UVs are wrong.
glBindBufferARB(GL_ARRAY_BUFFER_ARB, 1);
size_t offset = 0;
offset = offsetof(MeshVert, position);
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(3, GL_FLOAT, sizeof(MeshVert), (void*)offset);
offset = offsetof(MeshVert, normal);
glEnableClientState(GL_NORMAL_ARRAY);
glNormalPointer(GL_FLOAT, sizeof(MeshVert), (void*)offset);
offset = offsetof(MeshVert, UV);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glClientActiveTextureARB(GL_TEXTURE0);
glTexCoordPointer(2, GL_FLOAT, sizeof(MeshVert), (void*)offset);
offset = offsetof(MeshVert, lightmapUV);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glClientActiveTextureARB(GL_TEXTURE1);
glTexCoordPointer(2, GL_FLOAT, sizeof(MeshVert), (void*)offset);
offset = offsetof(MeshVert, tangent);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glClientActiveTextureARB(GL_TEXTURE2);
glTexCoordPointer(3, GL_FLOAT, sizeof(MeshVert), (void*)offset);
offset = offsetof(MeshVert, biTangent);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glClientActiveTextureARB(GL_TEXTURE3);
glTexCoordPointer(3, GL_FLOAT, sizeof(MeshVert), (void*)(sizeof(vec3) * 3));
int *indices = meshes[meshnumber]->meshTextureIndices[group]->indices;
glDrawElements(GL_TRIANGLES, (GLsizei)meshes[meshnumber]->meshTextureIndices[group]->numIndices, GL_UNSIGNED_INT, indices);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glDisableClientState(GL_NORMAL_ARRAY);
glDisableClientState(GL_VERTEX_ARRAY);
glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
Nothing makes any sense to me so maybe someone can help me.
Thanks in advance.
