The deflection deformation of the overall spatial position of the pile ring is randomly generated after being squeezed by the pile ring, which is mainly manifested in that the pile ring deflects a certain angle with the normal direction of the blanket surface as the rotation axis [13]. Fig. 8 shows the schematic diagram of the deflection deformation of the spatial position of the pile ring, and a deflection angle is formed between the non deflected pile ring and the deflected pile ring β。 According to the measurement and statistics of the carpet, the deflection angle of the velvet ring in the spatial position after being squeezed shall not exceed ± 45 °. Therefore, the key to the appearance simulation of tufted carpet is to accurately represent the deflection angle (the allowable range is ± 45 °).
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