https://github.com/id-Software/Quake-III-Arena
Tip revision: dbe4ddb10315479fc00086f08e25d968b4b43c49 authored by Travis Bradshaw on 31 January 2012, 19:41:34 UTC
The Quake III Arena sources as originally released under the GPL license on August 20, 2005.
The Quake III Arena sources as originally released under the GPL license on August 20, 2005.
Tip revision: dbe4ddb
/*
===========================================================================
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
===========================================================================
*/
//
// q_math.c -- stateless support routines that are included in each code module
#include "q_shared.h"
vec3_t vec3_origin = {0,0,0};
vec3_t axisDefault[3] = { { 1, 0, 0 }, { 0, 1, 0 }, { 0, 0, 1 } };
vec4_t colorBlack = {0, 0, 0, 1};
vec4_t colorRed = {1, 0, 0, 1};
vec4_t colorGreen = {0, 1, 0, 1};
vec4_t colorBlue = {0, 0, 1, 1};
vec4_t colorYellow = {1, 1, 0, 1};
vec4_t colorMagenta= {1, 0, 1, 1};
vec4_t colorCyan = {0, 1, 1, 1};
vec4_t colorWhite = {1, 1, 1, 1};
vec4_t colorLtGrey = {0.75, 0.75, 0.75, 1};
vec4_t colorMdGrey = {0.5, 0.5, 0.5, 1};
vec4_t colorDkGrey = {0.25, 0.25, 0.25, 1};
vec4_t g_color_table[8] =
{
{0.0, 0.0, 0.0, 1.0},
{1.0, 0.0, 0.0, 1.0},
{0.0, 1.0, 0.0, 1.0},
{1.0, 1.0, 0.0, 1.0},
{0.0, 0.0, 1.0, 1.0},
{0.0, 1.0, 1.0, 1.0},
{1.0, 0.0, 1.0, 1.0},
{1.0, 1.0, 1.0, 1.0},
};
vec3_t bytedirs[NUMVERTEXNORMALS] =
{
{-0.525731f, 0.000000f, 0.850651f}, {-0.442863f, 0.238856f, 0.864188f},
{-0.295242f, 0.000000f, 0.955423f}, {-0.309017f, 0.500000f, 0.809017f},
{-0.162460f, 0.262866f, 0.951056f}, {0.000000f, 0.000000f, 1.000000f},
{0.000000f, 0.850651f, 0.525731f}, {-0.147621f, 0.716567f, 0.681718f},
{0.147621f, 0.716567f, 0.681718f}, {0.000000f, 0.525731f, 0.850651f},
{0.309017f, 0.500000f, 0.809017f}, {0.525731f, 0.000000f, 0.850651f},
{0.295242f, 0.000000f, 0.955423f}, {0.442863f, 0.238856f, 0.864188f},
{0.162460f, 0.262866f, 0.951056f}, {-0.681718f, 0.147621f, 0.716567f},
{-0.809017f, 0.309017f, 0.500000f},{-0.587785f, 0.425325f, 0.688191f},
{-0.850651f, 0.525731f, 0.000000f},{-0.864188f, 0.442863f, 0.238856f},
{-0.716567f, 0.681718f, 0.147621f},{-0.688191f, 0.587785f, 0.425325f},
{-0.500000f, 0.809017f, 0.309017f}, {-0.238856f, 0.864188f, 0.442863f},
{-0.425325f, 0.688191f, 0.587785f}, {-0.716567f, 0.681718f, -0.147621f},
{-0.500000f, 0.809017f, -0.309017f}, {-0.525731f, 0.850651f, 0.000000f},
{0.000000f, 0.850651f, -0.525731f}, {-0.238856f, 0.864188f, -0.442863f},
{0.000000f, 0.955423f, -0.295242f}, {-0.262866f, 0.951056f, -0.162460f},
{0.000000f, 1.000000f, 0.000000f}, {0.000000f, 0.955423f, 0.295242f},
{-0.262866f, 0.951056f, 0.162460f}, {0.238856f, 0.864188f, 0.442863f},
{0.262866f, 0.951056f, 0.162460f}, {0.500000f, 0.809017f, 0.309017f},
{0.238856f, 0.864188f, -0.442863f},{0.262866f, 0.951056f, -0.162460f},
{0.500000f, 0.809017f, -0.309017f},{0.850651f, 0.525731f, 0.000000f},
{0.716567f, 0.681718f, 0.147621f}, {0.716567f, 0.681718f, -0.147621f},
{0.525731f, 0.850651f, 0.000000f}, {0.425325f, 0.688191f, 0.587785f},
{0.864188f, 0.442863f, 0.238856f}, {0.688191f, 0.587785f, 0.425325f},
{0.809017f, 0.309017f, 0.500000f}, {0.681718f, 0.147621f, 0.716567f},
{0.587785f, 0.425325f, 0.688191f}, {0.955423f, 0.295242f, 0.000000f},
{1.000000f, 0.000000f, 0.000000f}, {0.951056f, 0.162460f, 0.262866f},
{0.850651f, -0.525731f, 0.000000f},{0.955423f, -0.295242f, 0.000000f},
{0.864188f, -0.442863f, 0.238856f}, {0.951056f, -0.162460f, 0.262866f},
{0.809017f, -0.309017f, 0.500000f}, {0.681718f, -0.147621f, 0.716567f},
{0.850651f, 0.000000f, 0.525731f}, {0.864188f, 0.442863f, -0.238856f},
{0.809017f, 0.309017f, -0.500000f}, {0.951056f, 0.162460f, -0.262866f},
{0.525731f, 0.000000f, -0.850651f}, {0.681718f, 0.147621f, -0.716567f},
{0.681718f, -0.147621f, -0.716567f},{0.850651f, 0.000000f, -0.525731f},
{0.809017f, -0.309017f, -0.500000f}, {0.864188f, -0.442863f, -0.238856f},
{0.951056f, -0.162460f, -0.262866f}, {0.147621f, 0.716567f, -0.681718f},
{0.309017f, 0.500000f, -0.809017f}, {0.425325f, 0.688191f, -0.587785f},
{0.442863f, 0.238856f, -0.864188f}, {0.587785f, 0.425325f, -0.688191f},
{0.688191f, 0.587785f, -0.425325f}, {-0.147621f, 0.716567f, -0.681718f},
{-0.309017f, 0.500000f, -0.809017f}, {0.000000f, 0.525731f, -0.850651f},
{-0.525731f, 0.000000f, -0.850651f}, {-0.442863f, 0.238856f, -0.864188f},
{-0.295242f, 0.000000f, -0.955423f}, {-0.162460f, 0.262866f, -0.951056f},
{0.000000f, 0.000000f, -1.000000f}, {0.295242f, 0.000000f, -0.955423f},
{0.162460f, 0.262866f, -0.951056f}, {-0.442863f, -0.238856f, -0.864188f},
{-0.309017f, -0.500000f, -0.809017f}, {-0.162460f, -0.262866f, -0.951056f},
{0.000000f, -0.850651f, -0.525731f}, {-0.147621f, -0.716567f, -0.681718f},
{0.147621f, -0.716567f, -0.681718f}, {0.000000f, -0.525731f, -0.850651f},
{0.309017f, -0.500000f, -0.809017f}, {0.442863f, -0.238856f, -0.864188f},
{0.162460f, -0.262866f, -0.951056f}, {0.238856f, -0.864188f, -0.442863f},
{0.500000f, -0.809017f, -0.309017f}, {0.425325f, -0.688191f, -0.587785f},
{0.716567f, -0.681718f, -0.147621f}, {0.688191f, -0.587785f, -0.425325f},
{0.587785f, -0.425325f, -0.688191f}, {0.000000f, -0.955423f, -0.295242f},
{0.000000f, -1.000000f, 0.000000f}, {0.262866f, -0.951056f, -0.162460f},
{0.000000f, -0.850651f, 0.525731f}, {0.000000f, -0.955423f, 0.295242f},
{0.238856f, -0.864188f, 0.442863f}, {0.262866f, -0.951056f, 0.162460f},
{0.500000f, -0.809017f, 0.309017f}, {0.716567f, -0.681718f, 0.147621f},
{0.525731f, -0.850651f, 0.000000f}, {-0.238856f, -0.864188f, -0.442863f},
{-0.500000f, -0.809017f, -0.309017f}, {-0.262866f, -0.951056f, -0.162460f},
{-0.850651f, -0.525731f, 0.000000f}, {-0.716567f, -0.681718f, -0.147621f},
{-0.716567f, -0.681718f, 0.147621f}, {-0.525731f, -0.850651f, 0.000000f},
{-0.500000f, -0.809017f, 0.309017f}, {-0.238856f, -0.864188f, 0.442863f},
{-0.262866f, -0.951056f, 0.162460f}, {-0.864188f, -0.442863f, 0.238856f},
{-0.809017f, -0.309017f, 0.500000f}, {-0.688191f, -0.587785f, 0.425325f},
{-0.681718f, -0.147621f, 0.716567f}, {-0.442863f, -0.238856f, 0.864188f},
{-0.587785f, -0.425325f, 0.688191f}, {-0.309017f, -0.500000f, 0.809017f},
{-0.147621f, -0.716567f, 0.681718f}, {-0.425325f, -0.688191f, 0.587785f},
{-0.162460f, -0.262866f, 0.951056f}, {0.442863f, -0.238856f, 0.864188f},
{0.162460f, -0.262866f, 0.951056f}, {0.309017f, -0.500000f, 0.809017f},
{0.147621f, -0.716567f, 0.681718f}, {0.000000f, -0.525731f, 0.850651f},
{0.425325f, -0.688191f, 0.587785f}, {0.587785f, -0.425325f, 0.688191f},
{0.688191f, -0.587785f, 0.425325f}, {-0.955423f, 0.295242f, 0.000000f},
{-0.951056f, 0.162460f, 0.262866f}, {-1.000000f, 0.000000f, 0.000000f},
{-0.850651f, 0.000000f, 0.525731f}, {-0.955423f, -0.295242f, 0.000000f},
{-0.951056f, -0.162460f, 0.262866f}, {-0.864188f, 0.442863f, -0.238856f},
{-0.951056f, 0.162460f, -0.262866f}, {-0.809017f, 0.309017f, -0.500000f},
{-0.864188f, -0.442863f, -0.238856f}, {-0.951056f, -0.162460f, -0.262866f},
{-0.809017f, -0.309017f, -0.500000f}, {-0.681718f, 0.147621f, -0.716567f},
{-0.681718f, -0.147621f, -0.716567f}, {-0.850651f, 0.000000f, -0.525731f},
{-0.688191f, 0.587785f, -0.425325f}, {-0.587785f, 0.425325f, -0.688191f},
{-0.425325f, 0.688191f, -0.587785f}, {-0.425325f, -0.688191f, -0.587785f},
{-0.587785f, -0.425325f, -0.688191f}, {-0.688191f, -0.587785f, -0.425325f}
};
//==============================================================
int Q_rand( int *seed ) {
*seed = (69069 * *seed + 1);
return *seed;
}
float Q_random( int *seed ) {
return ( Q_rand( seed ) & 0xffff ) / (float)0x10000;
}
float Q_crandom( int *seed ) {
return 2.0 * ( Q_random( seed ) - 0.5 );
}
#ifdef __LCC__
int VectorCompare( const vec3_t v1, const vec3_t v2 ) {
if (v1[0] != v2[0] || v1[1] != v2[1] || v1[2] != v2[2]) {
return 0;
}
return 1;
}
vec_t VectorLength( const vec3_t v ) {
return (vec_t)sqrt (v[0]*v[0] + v[1]*v[1] + v[2]*v[2]);
}
vec_t VectorLengthSquared( const vec3_t v ) {
return (v[0]*v[0] + v[1]*v[1] + v[2]*v[2]);
}
vec_t Distance( const vec3_t p1, const vec3_t p2 ) {
vec3_t v;
VectorSubtract (p2, p1, v);
return VectorLength( v );
}
vec_t DistanceSquared( const vec3_t p1, const vec3_t p2 ) {
vec3_t v;
VectorSubtract (p2, p1, v);
return v[0]*v[0] + v[1]*v[1] + v[2]*v[2];
}
// fast vector normalize routine that does not check to make sure
// that length != 0, nor does it return length, uses rsqrt approximation
void VectorNormalizeFast( vec3_t v )
{
float ilength;
ilength = Q_rsqrt( DotProduct( v, v ) );
v[0] *= ilength;
v[1] *= ilength;
v[2] *= ilength;
}
void VectorInverse( vec3_t v ){
v[0] = -v[0];
v[1] = -v[1];
v[2] = -v[2];
}
void CrossProduct( const vec3_t v1, const vec3_t v2, vec3_t cross ) {
cross[0] = v1[1]*v2[2] - v1[2]*v2[1];
cross[1] = v1[2]*v2[0] - v1[0]*v2[2];
cross[2] = v1[0]*v2[1] - v1[1]*v2[0];
}
#endif
//=======================================================
signed char ClampChar( int i ) {
if ( i < -128 ) {
return -128;
}
if ( i > 127 ) {
return 127;
}
return i;
}
signed short ClampShort( int i ) {
if ( i < -32768 ) {
return -32768;
}
if ( i > 0x7fff ) {
return 0x7fff;
}
return i;
}
// this isn't a real cheap function to call!
int DirToByte( vec3_t dir ) {
int i, best;
float d, bestd;
if ( !dir ) {
return 0;
}
bestd = 0;
best = 0;
for (i=0 ; i<NUMVERTEXNORMALS ; i++)
{
d = DotProduct (dir, bytedirs[i]);
if (d > bestd)
{
bestd = d;
best = i;
}
}
return best;
}
void ByteToDir( int b, vec3_t dir ) {
if ( b < 0 || b >= NUMVERTEXNORMALS ) {
VectorCopy( vec3_origin, dir );
return;
}
VectorCopy (bytedirs[b], dir);
}
unsigned ColorBytes3 (float r, float g, float b) {
unsigned i;
( (byte *)&i )[0] = r * 255;
( (byte *)&i )[1] = g * 255;
( (byte *)&i )[2] = b * 255;
return i;
}
unsigned ColorBytes4 (float r, float g, float b, float a) {
unsigned i;
( (byte *)&i )[0] = r * 255;
( (byte *)&i )[1] = g * 255;
( (byte *)&i )[2] = b * 255;
( (byte *)&i )[3] = a * 255;
return i;
}
float NormalizeColor( const vec3_t in, vec3_t out ) {
float max;
max = in[0];
if ( in[1] > max ) {
max = in[1];
}
if ( in[2] > max ) {
max = in[2];
}
if ( !max ) {
VectorClear( out );
} else {
out[0] = in[0] / max;
out[1] = in[1] / max;
out[2] = in[2] / max;
}
return max;
}
/*
=====================
PlaneFromPoints
Returns false if the triangle is degenrate.
The normal will point out of the clock for clockwise ordered points
=====================
*/
qboolean PlaneFromPoints( vec4_t plane, const vec3_t a, const vec3_t b, const vec3_t c ) {
vec3_t d1, d2;
VectorSubtract( b, a, d1 );
VectorSubtract( c, a, d2 );
CrossProduct( d2, d1, plane );
if ( VectorNormalize( plane ) == 0 ) {
return qfalse;
}
plane[3] = DotProduct( a, plane );
return qtrue;
}
/*
===============
RotatePointAroundVector
This is not implemented very well...
===============
*/
void RotatePointAroundVector( vec3_t dst, const vec3_t dir, const vec3_t point,
float degrees ) {
float m[3][3];
float im[3][3];
float zrot[3][3];
float tmpmat[3][3];
float rot[3][3];
int i;
vec3_t vr, vup, vf;
float rad;
vf[0] = dir[0];
vf[1] = dir[1];
vf[2] = dir[2];
PerpendicularVector( vr, dir );
CrossProduct( vr, vf, vup );
m[0][0] = vr[0];
m[1][0] = vr[1];
m[2][0] = vr[2];
m[0][1] = vup[0];
m[1][1] = vup[1];
m[2][1] = vup[2];
m[0][2] = vf[0];
m[1][2] = vf[1];
m[2][2] = vf[2];
memcpy( im, m, sizeof( im ) );
im[0][1] = m[1][0];
im[0][2] = m[2][0];
im[1][0] = m[0][1];
im[1][2] = m[2][1];
im[2][0] = m[0][2];
im[2][1] = m[1][2];
memset( zrot, 0, sizeof( zrot ) );
zrot[0][0] = zrot[1][1] = zrot[2][2] = 1.0F;
rad = DEG2RAD( degrees );
zrot[0][0] = cos( rad );
zrot[0][1] = sin( rad );
zrot[1][0] = -sin( rad );
zrot[1][1] = cos( rad );
MatrixMultiply( m, zrot, tmpmat );
MatrixMultiply( tmpmat, im, rot );
for ( i = 0; i < 3; i++ ) {
dst[i] = rot[i][0] * point[0] + rot[i][1] * point[1] + rot[i][2] * point[2];
}
}
/*
===============
RotateAroundDirection
===============
*/
void RotateAroundDirection( vec3_t axis[3], float yaw ) {
// create an arbitrary axis[1]
PerpendicularVector( axis[1], axis[0] );
// rotate it around axis[0] by yaw
if ( yaw ) {
vec3_t temp;
VectorCopy( axis[1], temp );
RotatePointAroundVector( axis[1], axis[0], temp, yaw );
}
// cross to get axis[2]
CrossProduct( axis[0], axis[1], axis[2] );
}
void vectoangles( const vec3_t value1, vec3_t angles ) {
float forward;
float yaw, pitch;
if ( value1[1] == 0 && value1[0] == 0 ) {
yaw = 0;
if ( value1[2] > 0 ) {
pitch = 90;
}
else {
pitch = 270;
}
}
else {
if ( value1[0] ) {
yaw = ( atan2 ( value1[1], value1[0] ) * 180 / M_PI );
}
else if ( value1[1] > 0 ) {
yaw = 90;
}
else {
yaw = 270;
}
if ( yaw < 0 ) {
yaw += 360;
}
forward = sqrt ( value1[0]*value1[0] + value1[1]*value1[1] );
pitch = ( atan2(value1[2], forward) * 180 / M_PI );
if ( pitch < 0 ) {
pitch += 360;
}
}
angles[PITCH] = -pitch;
angles[YAW] = yaw;
angles[ROLL] = 0;
}
/*
=================
AnglesToAxis
=================
*/
void AnglesToAxis( const vec3_t angles, vec3_t axis[3] ) {
vec3_t right;
// angle vectors returns "right" instead of "y axis"
AngleVectors( angles, axis[0], right, axis[2] );
VectorSubtract( vec3_origin, right, axis[1] );
}
void AxisClear( vec3_t axis[3] ) {
axis[0][0] = 1;
axis[0][1] = 0;
axis[0][2] = 0;
axis[1][0] = 0;
axis[1][1] = 1;
axis[1][2] = 0;
axis[2][0] = 0;
axis[2][1] = 0;
axis[2][2] = 1;
}
void AxisCopy( vec3_t in[3], vec3_t out[3] ) {
VectorCopy( in[0], out[0] );
VectorCopy( in[1], out[1] );
VectorCopy( in[2], out[2] );
}
void ProjectPointOnPlane( vec3_t dst, const vec3_t p, const vec3_t normal )
{
float d;
vec3_t n;
float inv_denom;
inv_denom = DotProduct( normal, normal );
#ifndef Q3_VM
assert( Q_fabs(inv_denom) != 0.0f ); // bk010122 - zero vectors get here
#endif
inv_denom = 1.0f / inv_denom;
d = DotProduct( normal, p ) * inv_denom;
n[0] = normal[0] * inv_denom;
n[1] = normal[1] * inv_denom;
n[2] = normal[2] * inv_denom;
dst[0] = p[0] - d * n[0];
dst[1] = p[1] - d * n[1];
dst[2] = p[2] - d * n[2];
}
/*
================
MakeNormalVectors
Given a normalized forward vector, create two
other perpendicular vectors
================
*/
void MakeNormalVectors( const vec3_t forward, vec3_t right, vec3_t up) {
float d;
// this rotate and negate guarantees a vector
// not colinear with the original
right[1] = -forward[0];
right[2] = forward[1];
right[0] = forward[2];
d = DotProduct (right, forward);
VectorMA (right, -d, forward, right);
VectorNormalize (right);
CrossProduct (right, forward, up);
}
void VectorRotate( vec3_t in, vec3_t matrix[3], vec3_t out )
{
out[0] = DotProduct( in, matrix[0] );
out[1] = DotProduct( in, matrix[1] );
out[2] = DotProduct( in, matrix[2] );
}
//============================================================================
#if !idppc
/*
** float q_rsqrt( float number )
*/
float Q_rsqrt( float number )
{
long i;
float x2, y;
const float threehalfs = 1.5F;
x2 = number * 0.5F;
y = number;
i = * ( long * ) &y; // evil floating point bit level hacking
i = 0x5f3759df - ( i >> 1 ); // what the fuck?
y = * ( float * ) &i;
y = y * ( threehalfs - ( x2 * y * y ) ); // 1st iteration
// y = y * ( threehalfs - ( x2 * y * y ) ); // 2nd iteration, this can be removed
#ifndef Q3_VM
#ifdef __linux__
assert( !isnan(y) ); // bk010122 - FPE?
#endif
#endif
return y;
}
float Q_fabs( float f ) {
int tmp = * ( int * ) &f;
tmp &= 0x7FFFFFFF;
return * ( float * ) &tmp;
}
#endif
//============================================================
/*
===============
LerpAngle
===============
*/
float LerpAngle (float from, float to, float frac) {
float a;
if ( to - from > 180 ) {
to -= 360;
}
if ( to - from < -180 ) {
to += 360;
}
a = from + frac * (to - from);
return a;
}
/*
=================
AngleSubtract
Always returns a value from -180 to 180
=================
*/
float AngleSubtract( float a1, float a2 ) {
float a;
a = a1 - a2;
while ( a > 180 ) {
a -= 360;
}
while ( a < -180 ) {
a += 360;
}
return a;
}
void AnglesSubtract( vec3_t v1, vec3_t v2, vec3_t v3 ) {
v3[0] = AngleSubtract( v1[0], v2[0] );
v3[1] = AngleSubtract( v1[1], v2[1] );
v3[2] = AngleSubtract( v1[2], v2[2] );
}
float AngleMod(float a) {
a = (360.0/65536) * ((int)(a*(65536/360.0)) & 65535);
return a;
}
/*
=================
AngleNormalize360
returns angle normalized to the range [0 <= angle < 360]
=================
*/
float AngleNormalize360 ( float angle ) {
return (360.0 / 65536) * ((int)(angle * (65536 / 360.0)) & 65535);
}
/*
=================
AngleNormalize180
returns angle normalized to the range [-180 < angle <= 180]
=================
*/
float AngleNormalize180 ( float angle ) {
angle = AngleNormalize360( angle );
if ( angle > 180.0 ) {
angle -= 360.0;
}
return angle;
}
/*
=================
AngleDelta
returns the normalized delta from angle1 to angle2
=================
*/
float AngleDelta ( float angle1, float angle2 ) {
return AngleNormalize180( angle1 - angle2 );
}
//============================================================
/*
=================
SetPlaneSignbits
=================
*/
void SetPlaneSignbits (cplane_t *out) {
int bits, j;
// for fast box on planeside test
bits = 0;
for (j=0 ; j<3 ; j++) {
if (out->normal[j] < 0) {
bits |= 1<<j;
}
}
out->signbits = bits;
}
/*
==================
BoxOnPlaneSide
Returns 1, 2, or 1 + 2
// this is the slow, general version
int BoxOnPlaneSide2 (vec3_t emins, vec3_t emaxs, struct cplane_s *p)
{
int i;
float dist1, dist2;
int sides;
vec3_t corners[2];
for (i=0 ; i<3 ; i++)
{
if (p->normal[i] < 0)
{
corners[0][i] = emins[i];
corners[1][i] = emaxs[i];
}
else
{
corners[1][i] = emins[i];
corners[0][i] = emaxs[i];
}
}
dist1 = DotProduct (p->normal, corners[0]) - p->dist;
dist2 = DotProduct (p->normal, corners[1]) - p->dist;
sides = 0;
if (dist1 >= 0)
sides = 1;
if (dist2 < 0)
sides |= 2;
return sides;
}
==================
*/
#if !( (defined __linux__ || __FreeBSD__) && (defined __i386__) && (!defined C_ONLY)) // rb010123
#if defined __LCC__ || defined C_ONLY || !id386 || defined __VECTORC
int BoxOnPlaneSide (vec3_t emins, vec3_t emaxs, struct cplane_s *p)
{
float dist1, dist2;
int sides;
// fast axial cases
if (p->type < 3)
{
if (p->dist <= emins[p->type])
return 1;
if (p->dist >= emaxs[p->type])
return 2;
return 3;
}
// general case
switch (p->signbits)
{
case 0:
dist1 = p->normal[0]*emaxs[0] + p->normal[1]*emaxs[1] + p->normal[2]*emaxs[2];
dist2 = p->normal[0]*emins[0] + p->normal[1]*emins[1] + p->normal[2]*emins[2];
break;
case 1:
dist1 = p->normal[0]*emins[0] + p->normal[1]*emaxs[1] + p->normal[2]*emaxs[2];
dist2 = p->normal[0]*emaxs[0] + p->normal[1]*emins[1] + p->normal[2]*emins[2];
break;
case 2:
dist1 = p->normal[0]*emaxs[0] + p->normal[1]*emins[1] + p->normal[2]*emaxs[2];
dist2 = p->normal[0]*emins[0] + p->normal[1]*emaxs[1] + p->normal[2]*emins[2];
break;
case 3:
dist1 = p->normal[0]*emins[0] + p->normal[1]*emins[1] + p->normal[2]*emaxs[2];
dist2 = p->normal[0]*emaxs[0] + p->normal[1]*emaxs[1] + p->normal[2]*emins[2];
break;
case 4:
dist1 = p->normal[0]*emaxs[0] + p->normal[1]*emaxs[1] + p->normal[2]*emins[2];
dist2 = p->normal[0]*emins[0] + p->normal[1]*emins[1] + p->normal[2]*emaxs[2];
break;
case 5:
dist1 = p->normal[0]*emins[0] + p->normal[1]*emaxs[1] + p->normal[2]*emins[2];
dist2 = p->normal[0]*emaxs[0] + p->normal[1]*emins[1] + p->normal[2]*emaxs[2];
break;
case 6:
dist1 = p->normal[0]*emaxs[0] + p->normal[1]*emins[1] + p->normal[2]*emins[2];
dist2 = p->normal[0]*emins[0] + p->normal[1]*emaxs[1] + p->normal[2]*emaxs[2];
break;
case 7:
dist1 = p->normal[0]*emins[0] + p->normal[1]*emins[1] + p->normal[2]*emins[2];
dist2 = p->normal[0]*emaxs[0] + p->normal[1]*emaxs[1] + p->normal[2]*emaxs[2];
break;
default:
dist1 = dist2 = 0; // shut up compiler
break;
}
sides = 0;
if (dist1 >= p->dist)
sides = 1;
if (dist2 < p->dist)
sides |= 2;
return sides;
}
#else
#pragma warning( disable: 4035 )
__declspec( naked ) int BoxOnPlaneSide (vec3_t emins, vec3_t emaxs, struct cplane_s *p)
{
static int bops_initialized;
static int Ljmptab[8];
__asm {
push ebx
cmp bops_initialized, 1
je initialized
mov bops_initialized, 1
mov Ljmptab[0*4], offset Lcase0
mov Ljmptab[1*4], offset Lcase1
mov Ljmptab[2*4], offset Lcase2
mov Ljmptab[3*4], offset Lcase3
mov Ljmptab[4*4], offset Lcase4
mov Ljmptab[5*4], offset Lcase5
mov Ljmptab[6*4], offset Lcase6
mov Ljmptab[7*4], offset Lcase7
initialized:
mov edx,dword ptr[4+12+esp]
mov ecx,dword ptr[4+4+esp]
xor eax,eax
mov ebx,dword ptr[4+8+esp]
mov al,byte ptr[17+edx]
cmp al,8
jge Lerror
fld dword ptr[0+edx]
fld st(0)
jmp dword ptr[Ljmptab+eax*4]
Lcase0:
fmul dword ptr[ebx]
fld dword ptr[0+4+edx]
fxch st(2)
fmul dword ptr[ecx]
fxch st(2)
fld st(0)
fmul dword ptr[4+ebx]
fld dword ptr[0+8+edx]
fxch st(2)
fmul dword ptr[4+ecx]
fxch st(2)
fld st(0)
fmul dword ptr[8+ebx]
fxch st(5)
faddp st(3),st(0)
fmul dword ptr[8+ecx]
fxch st(1)
faddp st(3),st(0)
fxch st(3)
faddp st(2),st(0)
jmp LSetSides
Lcase1:
fmul dword ptr[ecx]
fld dword ptr[0+4+edx]
fxch st(2)
fmul dword ptr[ebx]
fxch st(2)
fld st(0)
fmul dword ptr[4+ebx]
fld dword ptr[0+8+edx]
fxch st(2)
fmul dword ptr[4+ecx]
fxch st(2)
fld st(0)
fmul dword ptr[8+ebx]
fxch st(5)
faddp st(3),st(0)
fmul dword ptr[8+ecx]
fxch st(1)
faddp st(3),st(0)
fxch st(3)
faddp st(2),st(0)
jmp LSetSides
Lcase2:
fmul dword ptr[ebx]
fld dword ptr[0+4+edx]
fxch st(2)
fmul dword ptr[ecx]
fxch st(2)
fld st(0)
fmul dword ptr[4+ecx]
fld dword ptr[0+8+edx]
fxch st(2)
fmul dword ptr[4+ebx]
fxch st(2)
fld st(0)
fmul dword ptr[8+ebx]
fxch st(5)
faddp st(3),st(0)
fmul dword ptr[8+ecx]
fxch st(1)
faddp st(3),st(0)
fxch st(3)
faddp st(2),st(0)
jmp LSetSides
Lcase3:
fmul dword ptr[ecx]
fld dword ptr[0+4+edx]
fxch st(2)
fmul dword ptr[ebx]
fxch st(2)
fld st(0)
fmul dword ptr[4+ecx]
fld dword ptr[0+8+edx]
fxch st(2)
fmul dword ptr[4+ebx]
fxch st(2)
fld st(0)
fmul dword ptr[8+ebx]
fxch st(5)
faddp st(3),st(0)
fmul dword ptr[8+ecx]
fxch st(1)
faddp st(3),st(0)
fxch st(3)
faddp st(2),st(0)
jmp LSetSides
Lcase4:
fmul dword ptr[ebx]
fld dword ptr[0+4+edx]
fxch st(2)
fmul dword ptr[ecx]
fxch st(2)
fld st(0)
fmul dword ptr[4+ebx]
fld dword ptr[0+8+edx]
fxch st(2)
fmul dword ptr[4+ecx]
fxch st(2)
fld st(0)
fmul dword ptr[8+ecx]
fxch st(5)
faddp st(3),st(0)
fmul dword ptr[8+ebx]
fxch st(1)
faddp st(3),st(0)
fxch st(3)
faddp st(2),st(0)
jmp LSetSides
Lcase5:
fmul dword ptr[ecx]
fld dword ptr[0+4+edx]
fxch st(2)
fmul dword ptr[ebx]
fxch st(2)
fld st(0)
fmul dword ptr[4+ebx]
fld dword ptr[0+8+edx]
fxch st(2)
fmul dword ptr[4+ecx]
fxch st(2)
fld st(0)
fmul dword ptr[8+ecx]
fxch st(5)
faddp st(3),st(0)
fmul dword ptr[8+ebx]
fxch st(1)
faddp st(3),st(0)
fxch st(3)
faddp st(2),st(0)
jmp LSetSides
Lcase6:
fmul dword ptr[ebx]
fld dword ptr[0+4+edx]
fxch st(2)
fmul dword ptr[ecx]
fxch st(2)
fld st(0)
fmul dword ptr[4+ecx]
fld dword ptr[0+8+edx]
fxch st(2)
fmul dword ptr[4+ebx]
fxch st(2)
fld st(0)
fmul dword ptr[8+ecx]
fxch st(5)
faddp st(3),st(0)
fmul dword ptr[8+ebx]
fxch st(1)
faddp st(3),st(0)
fxch st(3)
faddp st(2),st(0)
jmp LSetSides
Lcase7:
fmul dword ptr[ecx]
fld dword ptr[0+4+edx]
fxch st(2)
fmul dword ptr[ebx]
fxch st(2)
fld st(0)
fmul dword ptr[4+ecx]
fld dword ptr[0+8+edx]
fxch st(2)
fmul dword ptr[4+ebx]
fxch st(2)
fld st(0)
fmul dword ptr[8+ecx]
fxch st(5)
faddp st(3),st(0)
fmul dword ptr[8+ebx]
fxch st(1)
faddp st(3),st(0)
fxch st(3)
faddp st(2),st(0)
LSetSides:
faddp st(2),st(0)
fcomp dword ptr[12+edx]
xor ecx,ecx
fnstsw ax
fcomp dword ptr[12+edx]
and ah,1
xor ah,1
add cl,ah
fnstsw ax
and ah,1
add ah,ah
add cl,ah
pop ebx
mov eax,ecx
ret
Lerror:
int 3
}
}
#pragma warning( default: 4035 )
#endif
#endif
/*
=================
RadiusFromBounds
=================
*/
float RadiusFromBounds( const vec3_t mins, const vec3_t maxs ) {
int i;
vec3_t corner;
float a, b;
for (i=0 ; i<3 ; i++) {
a = fabs( mins[i] );
b = fabs( maxs[i] );
corner[i] = a > b ? a : b;
}
return VectorLength (corner);
}
void ClearBounds( vec3_t mins, vec3_t maxs ) {
mins[0] = mins[1] = mins[2] = 99999;
maxs[0] = maxs[1] = maxs[2] = -99999;
}
void AddPointToBounds( const vec3_t v, vec3_t mins, vec3_t maxs ) {
if ( v[0] < mins[0] ) {
mins[0] = v[0];
}
if ( v[0] > maxs[0]) {
maxs[0] = v[0];
}
if ( v[1] < mins[1] ) {
mins[1] = v[1];
}
if ( v[1] > maxs[1]) {
maxs[1] = v[1];
}
if ( v[2] < mins[2] ) {
mins[2] = v[2];
}
if ( v[2] > maxs[2]) {
maxs[2] = v[2];
}
}
vec_t VectorNormalize( vec3_t v ) {
// NOTE: TTimo - Apple G4 altivec source uses double?
float length, ilength;
length = v[0]*v[0] + v[1]*v[1] + v[2]*v[2];
length = sqrt (length);
if ( length ) {
ilength = 1/length;
v[0] *= ilength;
v[1] *= ilength;
v[2] *= ilength;
}
return length;
}
vec_t VectorNormalize2( const vec3_t v, vec3_t out) {
float length, ilength;
length = v[0]*v[0] + v[1]*v[1] + v[2]*v[2];
length = sqrt (length);
if (length)
{
#ifndef Q3_VM // bk0101022 - FPE related
// assert( ((Q_fabs(v[0])!=0.0f) || (Q_fabs(v[1])!=0.0f) || (Q_fabs(v[2])!=0.0f)) );
#endif
ilength = 1/length;
out[0] = v[0]*ilength;
out[1] = v[1]*ilength;
out[2] = v[2]*ilength;
} else {
#ifndef Q3_VM // bk0101022 - FPE related
// assert( ((Q_fabs(v[0])==0.0f) && (Q_fabs(v[1])==0.0f) && (Q_fabs(v[2])==0.0f)) );
#endif
VectorClear( out );
}
return length;
}
void _VectorMA( const vec3_t veca, float scale, const vec3_t vecb, vec3_t vecc) {
vecc[0] = veca[0] + scale*vecb[0];
vecc[1] = veca[1] + scale*vecb[1];
vecc[2] = veca[2] + scale*vecb[2];
}
vec_t _DotProduct( const vec3_t v1, const vec3_t v2 ) {
return v1[0]*v2[0] + v1[1]*v2[1] + v1[2]*v2[2];
}
void _VectorSubtract( const vec3_t veca, const vec3_t vecb, vec3_t out ) {
out[0] = veca[0]-vecb[0];
out[1] = veca[1]-vecb[1];
out[2] = veca[2]-vecb[2];
}
void _VectorAdd( const vec3_t veca, const vec3_t vecb, vec3_t out ) {
out[0] = veca[0]+vecb[0];
out[1] = veca[1]+vecb[1];
out[2] = veca[2]+vecb[2];
}
void _VectorCopy( const vec3_t in, vec3_t out ) {
out[0] = in[0];
out[1] = in[1];
out[2] = in[2];
}
void _VectorScale( const vec3_t in, vec_t scale, vec3_t out ) {
out[0] = in[0]*scale;
out[1] = in[1]*scale;
out[2] = in[2]*scale;
}
void Vector4Scale( const vec4_t in, vec_t scale, vec4_t out ) {
out[0] = in[0]*scale;
out[1] = in[1]*scale;
out[2] = in[2]*scale;
out[3] = in[3]*scale;
}
int Q_log2( int val ) {
int answer;
answer = 0;
while ( ( val>>=1 ) != 0 ) {
answer++;
}
return answer;
}
/*
=================
PlaneTypeForNormal
=================
*/
/*
int PlaneTypeForNormal (vec3_t normal) {
if ( normal[0] == 1.0 )
return PLANE_X;
if ( normal[1] == 1.0 )
return PLANE_Y;
if ( normal[2] == 1.0 )
return PLANE_Z;
return PLANE_NON_AXIAL;
}
*/
/*
================
MatrixMultiply
================
*/
void MatrixMultiply(float in1[3][3], float in2[3][3], float out[3][3]) {
out[0][0] = in1[0][0] * in2[0][0] + in1[0][1] * in2[1][0] +
in1[0][2] * in2[2][0];
out[0][1] = in1[0][0] * in2[0][1] + in1[0][1] * in2[1][1] +
in1[0][2] * in2[2][1];
out[0][2] = in1[0][0] * in2[0][2] + in1[0][1] * in2[1][2] +
in1[0][2] * in2[2][2];
out[1][0] = in1[1][0] * in2[0][0] + in1[1][1] * in2[1][0] +
in1[1][2] * in2[2][0];
out[1][1] = in1[1][0] * in2[0][1] + in1[1][1] * in2[1][1] +
in1[1][2] * in2[2][1];
out[1][2] = in1[1][0] * in2[0][2] + in1[1][1] * in2[1][2] +
in1[1][2] * in2[2][2];
out[2][0] = in1[2][0] * in2[0][0] + in1[2][1] * in2[1][0] +
in1[2][2] * in2[2][0];
out[2][1] = in1[2][0] * in2[0][1] + in1[2][1] * in2[1][1] +
in1[2][2] * in2[2][1];
out[2][2] = in1[2][0] * in2[0][2] + in1[2][1] * in2[1][2] +
in1[2][2] * in2[2][2];
}
void AngleVectors( const vec3_t angles, vec3_t forward, vec3_t right, vec3_t up) {
float angle;
static float sr, sp, sy, cr, cp, cy;
// static to help MS compiler fp bugs
angle = angles[YAW] * (M_PI*2 / 360);
sy = sin(angle);
cy = cos(angle);
angle = angles[PITCH] * (M_PI*2 / 360);
sp = sin(angle);
cp = cos(angle);
angle = angles[ROLL] * (M_PI*2 / 360);
sr = sin(angle);
cr = cos(angle);
if (forward)
{
forward[0] = cp*cy;
forward[1] = cp*sy;
forward[2] = -sp;
}
if (right)
{
right[0] = (-1*sr*sp*cy+-1*cr*-sy);
right[1] = (-1*sr*sp*sy+-1*cr*cy);
right[2] = -1*sr*cp;
}
if (up)
{
up[0] = (cr*sp*cy+-sr*-sy);
up[1] = (cr*sp*sy+-sr*cy);
up[2] = cr*cp;
}
}
/*
** assumes "src" is normalized
*/
void PerpendicularVector( vec3_t dst, const vec3_t src )
{
int pos;
int i;
float minelem = 1.0F;
vec3_t tempvec;
/*
** find the smallest magnitude axially aligned vector
*/
for ( pos = 0, i = 0; i < 3; i++ )
{
if ( fabs( src[i] ) < minelem )
{
pos = i;
minelem = fabs( src[i] );
}
}
tempvec[0] = tempvec[1] = tempvec[2] = 0.0F;
tempvec[pos] = 1.0F;
/*
** project the point onto the plane defined by src
*/
ProjectPointOnPlane( dst, tempvec, src );
/*
** normalize the result
*/
VectorNormalize( dst );
}