4.12.3.1 Conventions

• Ps denotes a polygon in some space. For example, Pw is a polygon in world space coordinates. The other spaces are o for object space, c for camera space, t for texture space, and s for screen space.
• Vs denotes a vertex in 3D. For example, Vw is a vertex in world space.
• Mst denotes a matrix transforming space from s to t. For example, Mow is a matrix transforming from object to world space. All Mst are 3x3 matrices.
• Vst denotes the corresponding vector transforming space from s to t.
• Ns denotes a plane normal vector (A,B,C) in some space.
• Vs.x, Vs.y, and Vs.z are the respective x, y, and z components of a vector. For example, Vw.y is the y component of a vector in world space.
• Vt.u and Vt.v are the respective u, and v components of a vector in texture space.

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