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| author | Björn-Egil Dahlberg <[email protected]> | 2016-05-11 22:21:23 +0200 |
|---|---|---|
| committer | Björn-Egil Dahlberg <[email protected]> | 2016-05-11 22:21:23 +0200 |
| commit | c57ea89a4f53f78dd42b0fdfba73454ab5792302 (patch) | |
| tree | 59aeb0ff49d1015c30f6f09e243181b3a1c3c884 /lib/percept/src | |
| parent | 715876f5e6d40bc75ad8f3e6c4c70249aea0fc66 (diff) | |
| download | otp-c57ea89a4f53f78dd42b0fdfba73454ab5792302.tar.gz otp-c57ea89a4f53f78dd42b0fdfba73454ab5792302.tar.bz2 otp-c57ea89a4f53f78dd42b0fdfba73454ab5792302.zip | |
egd: Improve span calculation
Diffstat (limited to 'lib/percept/src')
| -rw-r--r-- | lib/percept/src/egd_primitives.erl | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/lib/percept/src/egd_primitives.erl b/lib/percept/src/egd_primitives.erl index 7b6e15efe7..14c8c3506d 100644 --- a/lib/percept/src/egd_primitives.erl +++ b/lib/percept/src/egd_primitives.erl @@ -411,15 +411,17 @@ point_side(_) -> on_line. %% AUX -span(Points) -> - Xs = [TX||{TX, _} <- Points], - Ys = [TY||{_, TY} <- Points], - Xmin = lists:min(Xs), - Xmax = lists:max(Xs), - Ymin = lists:min(Ys), - Ymax = lists:max(Ys), +span([{X0,Y0}|Points]) -> + span(Points,X0,Y0,X0,Y0). +span([{X0,Y0}|Points],Xmin,Ymin,Xmax,Ymax) -> + span(Points,erlang:min(Xmin,X0), + erlang:min(Ymin,Y0), + erlang:max(Xmax,X0), + erlang:max(Ymax,Y0)); +span([],Xmin,Ymin,Xmax,Ymax) -> {Xmin,Ymin,Xmax,Ymax}. + rgb_float2byte({R,G,B}) -> rgb_float2byte({R,G,B,1.0}); rgb_float2byte({R,G,B,A}) -> {trunc(R*255), trunc(G*255), trunc(B*255), trunc(A*255)}. |