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Tag: rose

เอาสักดอกไหม

จาก http://www.sakngoi.com/2015/10/30/สมการดอกกุหลาบ/ library(misc3d) rose <- function(x,theta,axis) { phi <- (pi/2)*exp(-theta/(8*pi)) X <- 1-(1/2)*((5/4)*(1- ((3.6 * theta) %% (2*pi))/pi)^2-1/4)^2 y <- 1.95653* x*x * (1.27689 *x-1)^2 * sin(phi) r <- X*(x *sin(phi)+y*cos(phi)) out<-switch(axis, x={ r*sin(theta) }, y={ r*cos(theta) }, z={ (X*(x* cos(phi)-y* sin(phi))) } ) return(out) } parametric3d( fx = function(u,v) rose(u,v,axis=”x”), fy = function(u,v) rose(u,v,axis=”y”), fz […]

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