23 lines
525 B
R
23 lines
525 B
R
# TODO: Add comment
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#
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# Author: francois
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###############################################################################
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ellipse_param <- function(t,X,Y,a,b,phi)
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{
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cbind(X + a * cos(t)*cos(phi) - b*sin(t)*sin(phi),Y + a *
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cos(t)*sin(phi) + b*sin(t)*cos(phi))
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}
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dans_ellipse_param <- function(coord,param)
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{
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x <- coord[,1]
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y <- coord[,2]
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xc <- param[1]
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yc <- param[2]
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a <- param[3]
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b <- param[4]
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phi <- param[5]
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(((x-xc)*cos(phi)-(y-yc)*sin(phi))^2/a^2 +
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((x-xc)*sin(phi)+(y-yc)*cos(phi))^2/b^2) <= 1
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}
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