R Under development (unstable) (2024-01-23 r85822 ucrt) -- "Unsuffered Consequences"
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Platform: x86_64-w64-mingw32/x64

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> 
> library( spacesRGB )
> 
> options( width=144 )
>     
> printf <- function( msg, ... )
+     {    
+     mess = sprintf( msg[1], ... )    # should this really be msg[1] ?
+     cat( mess, '\n' )   #, file=stderr() )
+     }
> 
> #   return value
> #       an integer matrix with (n+1)(n+2)/2 rows  and  3 columns
> #       the integers are all non-negative
> #       in each row, the integers sum to n, and all rows are distinct
> #
> #   method is crude - make about double what is needed and then delete the wrong ones
> ternaryGrid  <-  function( n )
+     {
+     s   = 0L:as.integer(n)
+     out = as.matrix( expand.grid( s, s ) ) #;     print(str(out))
+     c3  = as.integer(n - rowSums(out))
+     out = cbind( out, c3 )
+     out = out[ 0 <= c3, ]
+     
+     dimnames(out)   = NULL
+     
+     # print(str(out))
+     
+     return(out)
+     }
>     
> plotGrid  <-  function( dims=c(6,4), ydir='bottom-up', shape='full' )
+     {
+     if( grepl("^bottom",ydir) )
+         data    = expand.grid( LEFT=0:(dims[1]-1), BOTTOM=0:(dims[2]-1) ) 
+     else
+         data    = expand.grid( LEFT=0:(dims[1]-1), TOP=0:(dims[2]-1) ) 
+         
+     data$WIDTH  = 1    
+     data$HEIGHT = 1   
+     #   print( str(data) )
+         
+     set.seed(0)
+     patches = nrow( data )
+     data$RGB = matrix( runif(patches*3), patches, 3, byrow=T )
+ 
+     plotPatchesRGB( data, which='signal', shape=shape, back=0.5, labels=FALSE )
+     
+     main    = sprintf( "%s     %s", ydir, shape )
+     title( main=main )
+     
+     return(TRUE)
+     }
>     
>     
> plotHexagons  <-  function( n=7 )
+     {
+     #   make matrix of 3 vertices
+     vert3   = matrix( c(0,0, 1,0,  0.5,sqrt(3)/2), 2, 3 )
+     
+     weight  = t( ternaryGrid(n-1) ) / (n-1)
+     
+ 
+     vert    = t( vert3 %*% weight )
+     patches = nrow(vert)      
+     
+     width   = 1/(n-1)
+     height  = (2/sqrt(3)) * width
+ 
+     #   triangle with base on top
+     # data    = data.frame( LEFT=vert[ ,1]-width/2 , TOP=vert[ ,2] - height/2, WIDTH=width, HEIGHT=height )
+ 
+     #   triangle with base on bottom
+     data    = data.frame( LEFT=vert[ ,1]-width/2 , BOTTOM=vert[ ,2] - height/2, WIDTH=width, HEIGHT=height )
+     
+     
+     #   make colors
+     set.seed(0)
+     data$RGB = matrix( runif(patches*3), patches, 3, byrow=T )
+ 
+     plotPatchesRGB( data, which='signal', shape='vhex', back=0.5, labels=FALSE )
+     
+     title( main="ternary grid" )
+     
+     return(TRUE)
+     }
>     
> shapevec = c('full','half','hhex','vhex','left','right','bottom','top')
> shapevec = c( shapevec, 'topleft', 'topright', 'bottomleft', 'bottomright' )
> for( shape in shapevec )
+     {
+     for( ydir in c('bottom-up','top-down') )
+         {
+         if( ! plotGrid( ydir=ydir, shape=shape) )      stop( "plotGrid() failed !", call.=FALSE )
+         }
+     }
>     
>     
>     
>     
> if( ! plotHexagons() )  stop( "plotHexagons() failed !", call.=FALSE )
> 
> printf(  "\nPassed all plotting tests !" )

Passed all plotting tests ! 
>      
> 
> proc.time()
   user  system elapsed 
   0.39    0.10    0.48