feat(terrain): binary terrain files (.btf) made out of text terrain files (.txtf) named by terrain directives, checked against length and checksum of the text and loaded section by section when needed; -btf command line conversion; SBT files no longer generated, only loaded

export_btf_standalone.cpp

@@ -0,0 +1,41 @@
+#include "stdafx.h"
+
+#include "scene/sceneterrain.h"
+#include "utilities/Globals.h"
+#include "utilities/utilities.h"
+
+// converts text terrain file to binary format. returns: 0 on success, 1 otherwise
+int export_btf_standalone(std::string in, std::string out)
+{
+	if (in.empty())
+	{
+		std::printf("usage: -btf -s <text terrain file> [-o <binary terrain file>]\n");
+		return 1;
+	}
+	replace_slashes(in);
+	replace_slashes(out);
+	if (false == FileExists(in) && FileExists(Global.asCurrentSceneryPath + in))
+	{
+		// the file can be given the way the sceneries refer to it
+		in = Global.asCurrentSceneryPath + in;
+	}
+	if (out.empty())
+	{
+		// by default the binary file goes where the sceneries expect to find it, next to the text
+		out = in;
+		erase_extension(out);
+		out += ".btf";
+	}
+	std::string message;
+	auto const result{scene::terrain_file::convert(in, out, &message)};
+	// NOTE: the log service doesn't run in this mode, the outcome is reported directly
+	if (result)
+	{
+		std::printf("%s -> %s: %s\n", in.c_str(), out.c_str(), message.c_str());
+	}
+	else
+	{
+		std::printf("%s: conversion failed, %s\n", in.c_str(), message.c_str());
+	}
+	return (result ? 0 : 1);
+}