From 952c5c128f9efaea89d41d882c4ea3ade7df4591 Mon Sep 17 00:00:00 2001
From: zakk <zakk@edf5b092-35ff-0310-97b2-ce42778d08ea>
Date: Fri, 26 Aug 2005 04:48:05 +0000
Subject: Itsa me, quake3io!

git-svn-id: svn://svn.icculus.org/quake3/trunk@2 edf5b092-35ff-0310-97b2-ce42778d08ea
---
 code/splines/math_vector.cpp | 144 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 144 insertions(+)
 create mode 100755 code/splines/math_vector.cpp

(limited to 'code/splines/math_vector.cpp')

diff --git a/code/splines/math_vector.cpp b/code/splines/math_vector.cpp
new file mode 100755
index 0000000..a39d859
--- /dev/null
+++ b/code/splines/math_vector.cpp
@@ -0,0 +1,144 @@
+/*
+===========================================================================
+Copyright (C) 1999-2005 Id Software, Inc.
+
+This file is part of Quake III Arena source code.
+
+Quake III Arena source code is free software; you can redistribute it
+and/or modify it under the terms of the GNU General Public License as
+published by the Free Software Foundation; either version 2 of the License,
+or (at your option) any later version.
+
+Quake III Arena source code is distributed in the hope that it will be
+useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with Foobar; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+===========================================================================
+*/
+//#include "../game/q_shared.h"
+#include "math_vector.h"
+#include <assert.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+#include <stdlib.h>
+#include <time.h>
+#include <ctype.h>
+
+#define M_PI		3.14159265358979323846	// matches value in gcc v2 math.h
+
+#define LERP_DELTA 1e-6
+
+idVec3_t vec_zero( 0.0f, 0.0f, 0.0f );
+
+Bounds	boundsZero;
+
+float idVec3_t::toYaw( void ) {
+	float yaw;
+	
+	if ( ( y == 0 ) && ( x == 0 ) ) {
+		yaw = 0;
+	} else {
+		yaw = atan2( y, x ) * 180 / M_PI;
+		if ( yaw < 0 ) {
+			yaw += 360;
+		}
+	}
+
+	return yaw;
+}
+
+float idVec3_t::toPitch( void ) {
+	float	forward;
+	float	pitch;
+	
+	if ( ( x == 0 ) && ( y == 0 ) ) {
+		if ( z > 0 ) {
+			pitch = 90;
+		} else {
+			pitch = 270;
+		}
+	} else {
+		forward = ( float )idSqrt( x * x + y * y );
+		pitch = atan2( z, forward ) * 180 / M_PI;
+		if ( pitch < 0 ) {
+			pitch += 360;
+		}
+	}
+
+	return pitch;
+}
+
+/*
+angles_t idVec3_t::toAngles( void ) {
+	float forward;
+	float yaw;
+	float pitch;
+	
+	if ( ( x == 0 ) && ( y == 0 ) ) {
+		yaw = 0;
+		if ( z > 0 ) {
+			pitch = 90;
+		} else {
+			pitch = 270;
+		}
+	} else {
+		yaw = atan2( y, x ) * 180 / M_PI;
+		if ( yaw < 0 ) {
+			yaw += 360;
+		}
+
+		forward = ( float )idSqrt( x * x + y * y );
+		pitch = atan2( z, forward ) * 180 / M_PI;
+		if ( pitch < 0 ) {
+			pitch += 360;
+		}
+	}
+
+	return angles_t( -pitch, yaw, 0 );
+}
+*/
+
+idVec3_t LerpVector( idVec3_t &w1, idVec3_t &w2, const float t ) {
+	float omega, cosom, sinom, scale0, scale1;
+
+	cosom = w1 * w2;
+	if ( ( 1.0 - cosom ) > LERP_DELTA ) {
+		omega = acos( cosom );
+		sinom = sin( omega );
+		scale0 = sin( ( 1.0 - t ) * omega ) / sinom;
+		scale1 = sin( t * omega ) / sinom;
+	} else {
+		scale0 = 1.0 - t;
+		scale1 = t;
+	}
+
+	return ( w1 * scale0 + w2 * scale1 );
+}
+
+/*
+=============
+idVec3_t::string
+
+This is just a convenience function
+for printing vectors
+=============
+*/
+char *idVec3_t::string( void ) {
+	static	int		index = 0;
+	static	char	str[ 8 ][ 36 ];
+	char	*s;
+
+	// use an array so that multiple toString's won't collide
+	s = str[ index ];
+	index = (index + 1)&7;
+
+	sprintf( s, "%.2f %.2f %.2f", x, y, z );
+
+	return s;
+}
-- 
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