The circuit which decides non homogeneous secondary far texture mapping coordinate making use of linear interpolation

摘要

(57) Abstract The texture value decisive (TVD) circuit, non homogeneous secondary far texture mapping closely resembling, offers texture to the polygon making use of linear interpolation and entry parameter. The TVD circuit of this invention, includes with the vertical walk sub circuit and the orthogonal walk sub circuit. The vertical walk sub circuit, the texture coordinate u (a_{0, n}) which displays the pixel which parallels on principal inclination of the vertical of triangle and decides v (a_{0, n}). The orthogonal walk sub circuit is m0, crossing, texture coordinate concerning the polygonal coordinate position which advances u (a _{m, n}) and it decides v (a _{m, n}). Crossing, the coordinate position which advances displays the individual scanning line. The vertical walk sub circuit of the TVD circuit, includes the adder, latch, and the accumulator. Each element of the vertical walk sub circuit receives the vertical main inclined clock (n clock) signal. Output of vertical walk subsystem is calculated something related to below, namely, concerning m=0 and n0, u (a_{0, n}) =u (a_{0, n-1}) +du on the basis of _main+ (n1) d² u _main. Here, du _main and d² u _main are entry parameter. In addition as for the orthogonal walk sub circuit, the adder, latch, and the accumulator are included. The orthogonal walk sub circuit the clock is done by the orthogonal walk (m clock) signal and the n clock pulse. Output of the orthogonal walk sub circuit is calculated something related to below, namely, concerning m0, u (a _{m, n}) =u (a _{m-1 and n}) +n (du _ortho-ADD) +du on the basis of _orthof (m1) d² u _ortho. Here, du _ortho-ADD and du _ortho and d² u _ortho are entry parameter.