User:Jr/assorted

Jr — Mon, 05 Oct 2026 23:44:15 GMT

added a new macro, converting small ints to hex digits.

← Older revision		Revision as of 23:44, 5 October 2026
Line 166:		Line 166:

	(tested using version 3.7.0.8)		(tested using version 3.7.0.8)
		+
		+	<hr>
		+
		+	=== asc2hex() ===
		+
		+	this macro was written to complement <span class='plainlinks'>[https://news.povray.org/povray.general/message/%3Cweb.6ac3c3d735b30292596bf60e59126100%40news.povray.org%3E Gio's h2d() macro]</span>,
		+	it converts its "byte range" argument to a string, two hex digits.
		+
		+	<syntaxhighlight lang='pov'>
		+	#macro asc2hex(v_)
		+	#local e_ = "asc2hex: expect integer argument (0-255).";
		+	#if (v_ != int(v_)) #error e_ #elseif (v_ < 0 \| 255 < v_) #error e_ #end
		+	#local s_ = "0123456789abcdef";
		+	#local h_ = 1 + int(v_ / 16);
		+	#local l_ = 1 + int(mod(v_,16));
		+	concat(substr(s_,h_,1),substr(s_,l_,1))
		+	#end
		+	</syntaxhighlight>
		+
		+	ie.
		+
		+	<syntaxhighlight lang='pov'>
		+	#for (i_,0,255)
		+	#debug concat("i = ",str(i_,0,0)," == ",asc2hex(i_),"\n")
		+	#end
		+	</syntaxhighlight>
		+
		+	outputs
		+
		+	<syntaxhighlight lang='pov'>
		+	i = 0 == 00
		+	i = 1 == 01
		+	i = 2 == 02
		+	. . .
		+	i = 253 == fd
		+	i = 254 == fe
		+	i = 255 == ff
		+	</syntaxhighlight>
		+
		+	(tested using version 3.8.0-beta.2)

	[[Category:Macros]]		[[Category:Macros]]

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