Revision 972743 of Explaining basic 3D theory

<p>When it comes to the most basic 3D theory it's all about shapes in a 3D space using the coordinate system to calculate it's position.</p>

<p>All the shapes are built from vertices. A vertex have attributes like position, color, normal and texture. Position identifies it in a 3D space [x, y, z], color is holding an RGBA value, normal is a way to describe the direction the vertex is facing and texture is the image that the vertex can use instead of a simple color.</p>

<p>We should also mention that the face of the given shape is a plane between vertices. For example a cube have 8 different vertices (points in space) and 6 different faces, each constructed out of 4 vertices. Also, by connecting the points we're creating the edges of the cube.</p>

<p>The geometry is built from a vertex and the face, while material is a texture, which uses an image. If we connect the geometry with the material we will get a mesh.</p>

<p>[TODO: add images, coordinate system, transformation matrix, projection, meshes, vertices, etc]</p>