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133 lines
2.3 KiB
133 lines
2.3 KiB
/*** |
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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 "math.h" |
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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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#ifndef 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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extern vec3_t vec3_origin; |
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double sqrt(double x); |
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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; |
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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 && forward[0] == 0) |
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{ |
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yaw = 0; |
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if (forward[2] > 0) |
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pitch = 90; |
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else |
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pitch = 270; |
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} |
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else |
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{ |
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yaw = (atan2(forward[1], forward[0]) * 180 / M_PI); |
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if (yaw < 0) |
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yaw += 360; |
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tmp = sqrt (forward[0]*forward[0] + forward[1]*forward[1]); |
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pitch = (atan2(forward[2], tmp) * 180 / M_PI); |
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if (pitch < 0) |
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pitch += 360; |
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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; |
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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/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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