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utils/genrandomvectors/genrandomvectors.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//
+//=============================================================================//
+#include <stdlib.h>
+#include <stdio.h>
+#include "vstdlib/random.h"
+#include "math.h"
+
+void main( int argc, char **argv )
+{
+	if( argc != 2 )
+	{
+		fprintf( stderr, "Usage: genrandomvectors <numvects>\n" );
+		exit( -1 );
+	}
+
+	int nVectors = atoi( argv[1] );
+	int i;
+	RandomSeed( 0 );
+	for( i = 0; i < nVectors; i++ )
+	{
+		float z = RandomFloat( -1.0f, 1.0f );
+		float t = RandomFloat( 0, 2 * M_PI );
+		float r = sqrt( 1.0f - z * z );
+		float x = r * cos( t );
+		float y = r * sin( t );
+		printf( "Vector( %f, %f, %f ),\n", x, y, z );
+	}
+}