# # Demonstrate use of RGBA (Alpha channel + RGB) colors for lines and filled areas. # Color is represented by 32 bits AARRGGBB (i.e. Alpha is in the high bits) # Alpha = 0 is opaque; Alpha = 255 is transparent # This is BACKWARDS from the convention used by 'set style fill TRANSPARENT SOLID' # It is also BACKWARDS from the convention used by 'with rgbalpha' # set angle degrees set style arrow 1 size screen 0.03,15,90 noborder set style arrow 1 lc rgb variable lw 3 fade(i) = (int(255.*i/360.) << 24) + 0xEF8000 set obj 1 rect from -.5,-.5 to -.3,0 fs solid fc rgb "#00bbbbbb" front set obj 2 rect from -.3,-.3 to -.1,0.2 fs solid fc rgb "#55bbbbbb" front set obj 3 rect from -.1,-.1 to .3,0.3 fs solid fc rgb "#aabbbbbb" front set obj 4 rect from .3,-.4 to .4,0.4 fs solid fc rgb "#22bbbbbb" back set obj 10 circle at 0.15, -0.15 radius 0.5 fs solid fc rgb "cyan" behind unset border unset xtics unset ytics unset key set xrange [-1:1] set yrange [-1:1] set size square plot sample [i=5:360:5] '+' using (0):(0):(cos(i)):(sin(i)):(fade(i)) \ with vector as 1 pause -1 "Hit return to continue" reset
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