R/xsplineTangent.s1pos.s2pos.noA0.noA3.y.R

In vwline: Draw Variable-Width Lines

xsplineTangent.s1pos.s2pos.noA0.noA3.y <- function(px0, px1, px2, px3, py0, py1, py2, py3, s1, s2, t) {
(((((1/(-1 - s2) * ((t - 1 - s2)/(-1 - s2)) + ((t - 
    1 - s2)/(-1 - s2)) * (1/(-1 - s2))) * ((t - 1 - s2)/(-1 - 
    s2)) + ((t - 1 - s2)/(-1 - s2)) * ((t - 1 - s2)/(-1 - s2)) * 
    (1/(-1 - s2))) * (10 - (2 * (-1 - s2) * (-1 - s2)) + (2 * 
    (2 * (-1 - s2) * (-1 - s2)) - 15) * ((t - 1 - s2)/(-1 - s2)) + 
    (6 - (2 * (-1 - s2) * (-1 - s2))) * ((t - 1 - s2)/(-1 - s2)) * 
        ((t - 1 - s2)/(-1 - s2))) + ((t - 1 - s2)/(-1 - s2)) * 
    ((t - 1 - s2)/(-1 - s2)) * ((t - 1 - s2)/(-1 - s2)) * ((2 * 
    (2 * (-1 - s2) * (-1 - s2)) - 15) * (1/(-1 - s2)) + ((6 - 
    (2 * (-1 - s2) * (-1 - s2))) * (1/(-1 - s2)) * ((t - 1 - 
    s2)/(-1 - s2)) + (6 - (2 * (-1 - s2) * (-1 - s2))) * ((t - 
    1 - s2)/(-1 - s2)) * (1/(-1 - s2))))) * py1 + (((1/(1 + s1) * 
    ((t + s1)/(1 + s1)) + ((t + s1)/(1 + s1)) * (1/(1 + s1))) * 
    ((t + s1)/(1 + s1)) + ((t + s1)/(1 + s1)) * ((t + s1)/(1 + 
    s1)) * (1/(1 + s1))) * (10 - (2 * (1 + s1) * (1 + s1)) + 
    (2 * (2 * (1 + s1) * (1 + s1)) - 15) * ((t + s1)/(1 + s1)) + 
    (6 - (2 * (1 + s1) * (1 + s1))) * ((t + s1)/(1 + s1)) * ((t + 
        s1)/(1 + s1))) + ((t + s1)/(1 + s1)) * ((t + s1)/(1 + 
    s1)) * ((t + s1)/(1 + s1)) * ((2 * (2 * (1 + s1) * (1 + s1)) - 
    15) * (1/(1 + s1)) + ((6 - (2 * (1 + s1) * (1 + s1))) * (1/(1 + 
    s1)) * ((t + s1)/(1 + s1)) + (6 - (2 * (1 + s1) * (1 + s1))) * 
    ((t + s1)/(1 + s1)) * (1/(1 + s1))))) * py2)/(0 + ((t - 1 - 
    s2)/(-1 - s2)) * ((t - 1 - s2)/(-1 - s2)) * ((t - 1 - s2)/(-1 - 
    s2)) * (10 - (2 * (-1 - s2) * (-1 - s2)) + (2 * (2 * (-1 - 
    s2) * (-1 - s2)) - 15) * ((t - 1 - s2)/(-1 - s2)) + (6 - 
    (2 * (-1 - s2) * (-1 - s2))) * ((t - 1 - s2)/(-1 - s2)) * 
    ((t - 1 - s2)/(-1 - s2))) + ((t + s1)/(1 + s1)) * ((t + s1)/(1 + 
    s1)) * ((t + s1)/(1 + s1)) * (10 - (2 * (1 + s1) * (1 + s1)) + 
    (2 * (2 * (1 + s1) * (1 + s1)) - 15) * ((t + s1)/(1 + s1)) + 
    (6 - (2 * (1 + s1) * (1 + s1))) * ((t + s1)/(1 + s1)) * ((t + 
        s1)/(1 + s1))) + 0) - (0 * py0 + ((t - 1 - s2)/(-1 - 
    s2)) * ((t - 1 - s2)/(-1 - s2)) * ((t - 1 - s2)/(-1 - s2)) * 
    (10 - (2 * (-1 - s2) * (-1 - s2)) + (2 * (2 * (-1 - s2) * 
        (-1 - s2)) - 15) * ((t - 1 - s2)/(-1 - s2)) + (6 - (2 * 
        (-1 - s2) * (-1 - s2))) * ((t - 1 - s2)/(-1 - s2)) * 
        ((t - 1 - s2)/(-1 - s2))) * py1 + ((t + s1)/(1 + s1)) * 
    ((t + s1)/(1 + s1)) * ((t + s1)/(1 + s1)) * (10 - (2 * (1 + 
    s1) * (1 + s1)) + (2 * (2 * (1 + s1) * (1 + s1)) - 15) * 
    ((t + s1)/(1 + s1)) + (6 - (2 * (1 + s1) * (1 + s1))) * ((t + 
    s1)/(1 + s1)) * ((t + s1)/(1 + s1))) * py2 + 0 * py3) * (((1/(-1 - 
    s2) * ((t - 1 - s2)/(-1 - s2)) + ((t - 1 - s2)/(-1 - s2)) * 
    (1/(-1 - s2))) * ((t - 1 - s2)/(-1 - s2)) + ((t - 1 - s2)/(-1 - 
    s2)) * ((t - 1 - s2)/(-1 - s2)) * (1/(-1 - s2))) * (10 - 
    (2 * (-1 - s2) * (-1 - s2)) + (2 * (2 * (-1 - s2) * (-1 - 
    s2)) - 15) * ((t - 1 - s2)/(-1 - s2)) + (6 - (2 * (-1 - s2) * 
    (-1 - s2))) * ((t - 1 - s2)/(-1 - s2)) * ((t - 1 - s2)/(-1 - 
    s2))) + ((t - 1 - s2)/(-1 - s2)) * ((t - 1 - s2)/(-1 - s2)) * 
    ((t - 1 - s2)/(-1 - s2)) * ((2 * (2 * (-1 - s2) * (-1 - s2)) - 
    15) * (1/(-1 - s2)) + ((6 - (2 * (-1 - s2) * (-1 - s2))) * 
    (1/(-1 - s2)) * ((t - 1 - s2)/(-1 - s2)) + (6 - (2 * (-1 - 
    s2) * (-1 - s2))) * ((t - 1 - s2)/(-1 - s2)) * (1/(-1 - s2)))) + 
    (((1/(1 + s1) * ((t + s1)/(1 + s1)) + ((t + s1)/(1 + s1)) * 
        (1/(1 + s1))) * ((t + s1)/(1 + s1)) + ((t + s1)/(1 + 
        s1)) * ((t + s1)/(1 + s1)) * (1/(1 + s1))) * (10 - (2 * 
        (1 + s1) * (1 + s1)) + (2 * (2 * (1 + s1) * (1 + s1)) - 
        15) * ((t + s1)/(1 + s1)) + (6 - (2 * (1 + s1) * (1 + 
        s1))) * ((t + s1)/(1 + s1)) * ((t + s1)/(1 + s1))) + 
        ((t + s1)/(1 + s1)) * ((t + s1)/(1 + s1)) * ((t + s1)/(1 + 
            s1)) * ((2 * (2 * (1 + s1) * (1 + s1)) - 15) * (1/(1 + 
            s1)) + ((6 - (2 * (1 + s1) * (1 + s1))) * (1/(1 + 
            s1)) * ((t + s1)/(1 + s1)) + (6 - (2 * (1 + s1) * 
            (1 + s1))) * ((t + s1)/(1 + s1)) * (1/(1 + s1))))))/(0 + 
    ((t - 1 - s2)/(-1 - s2)) * ((t - 1 - s2)/(-1 - s2)) * ((t - 
        1 - s2)/(-1 - s2)) * (10 - (2 * (-1 - s2) * (-1 - s2)) + 
        (2 * (2 * (-1 - s2) * (-1 - s2)) - 15) * ((t - 1 - s2)/(-1 - 
            s2)) + (6 - (2 * (-1 - s2) * (-1 - s2))) * ((t - 
        1 - s2)/(-1 - s2)) * ((t - 1 - s2)/(-1 - s2))) + ((t + 
    s1)/(1 + s1)) * ((t + s1)/(1 + s1)) * ((t + s1)/(1 + s1)) * 
    (10 - (2 * (1 + s1) * (1 + s1)) + (2 * (2 * (1 + s1) * (1 + 
        s1)) - 15) * ((t + s1)/(1 + s1)) + (6 - (2 * (1 + s1) * 
        (1 + s1))) * ((t + s1)/(1 + s1)) * ((t + s1)/(1 + s1))) + 
    0)^2)
}