mirror of https://github.com/FWGS/hlsdk-xash3d
138 lines
2.5 KiB
C++
138 lines
2.5 KiB
C++
/***
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*
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* Copyright (c) 1996-2002, Valve LLC. All rights reserved.
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*
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* This product contains software technology licensed from Id
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* Software, Inc. ("Id Technology"). Id Technology (c) 1996 Id Software, Inc.
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* All Rights Reserved.
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*
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* Use, distribution, and modification of this source code and/or resulting
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* object code is restricted to non-commercial enhancements to products from
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* Valve LLC. All other use, distribution, or modification is prohibited
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* without written permission from Valve LLC.
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*
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****/
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//
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// util.cpp
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//
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// implementation of class-less helper functions
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//
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#include <stdio.h>
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#include <stdlib.h>
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#include <cmath>
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#include "hud.h"
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#include "cl_util.h"
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#include <string.h>
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#if !defined(M_PI)
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#define M_PI 3.14159265358979323846 // matches value in gcc v2 math.h
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#endif
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#if !defined(M_PI_F)
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#define M_PI_F (float)M_PI
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#endif
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// extern vec3_t vec3_origin;
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// if C++ mangling differs from C symbol name
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#if _MSC_VER || __WATCOMC__
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float vec3_origin[3];
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#endif
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float Length( const float *v )
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{
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int i;
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float length;
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length = 0.0f;
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for( i = 0; i < 3; i++ )
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length += v[i] * v[i];
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length = sqrt( length ); // FIXME
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return length;
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}
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void VectorAngles( const float *forward, float *angles )
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{
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float tmp, yaw, pitch;
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if( forward[1] == 0.0f && forward[0] == 0.0f )
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{
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yaw = 0.0f;
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if( forward[2] > 0.0f )
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pitch = 90.0f;
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else
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pitch = 270.0f;
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}
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else
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{
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yaw = ( atan2( forward[1], forward[0]) * 180.0f / M_PI_F );
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if( yaw < 0.0f )
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yaw += 360.0f;
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tmp = sqrt( forward[0] * forward[0] + forward[1] * forward[1] );
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pitch = ( atan2( forward[2], tmp ) * 180.0f / M_PI_F );
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if( pitch < 0.0f )
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pitch += 360.0f;
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}
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angles[0] = pitch;
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angles[1] = yaw;
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angles[2] = 0.0f;
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}
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float VectorNormalize( float *v )
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{
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float length, ilength;
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length = v[0] * v[0] + v[1] * v[1] + v[2] * v[2];
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length = sqrt( length ); // FIXME
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if( length )
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{
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ilength = 1.0f / length;
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v[0] *= ilength;
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v[1] *= ilength;
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v[2] *= ilength;
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}
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return length;
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}
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void VectorInverse( float *v )
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{
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v[0] = -v[0];
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v[1] = -v[1];
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v[2] = -v[2];
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}
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void VectorScale( const float *in, float scale, float *out )
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{
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out[0] = in[0] * scale;
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out[1] = in[1] * scale;
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out[2] = in[2] * scale;
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}
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void VectorMA( const float *veca, float scale, const float *vecb, float *vecc )
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{
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vecc[0] = veca[0] + scale * vecb[0];
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vecc[1] = veca[1] + scale * vecb[1];
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vecc[2] = veca[2] + scale * vecb[2];
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}
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HSPRITE LoadSprite( const char *pszName )
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{
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int i;
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char sz[256];
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if( ScreenWidth < 640 )
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i = 320;
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else
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i = 640;
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sprintf( sz, pszName, i );
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return SPR_Load( sz );
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}
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