ubergames/rpgxef
0
0
Fork 0
mirror of https://github.com/UberGames/rpgxEF.git synced 2024-11-15 01:11:25 +00:00
Code Issues Projects Releases Packages Wiki Activity
rpgxef/code/game/q_math.c

1490 lines
33 KiB
C
Raw Normal View History

Integrated RPG-X2 rpgxEF edition into the rpgxEF repo ... not quite content with where the project files lie but it is ok for now. ... compiling works fine so far (only tested mingw32 right now)
2012-08-04 10:54:37 +00:00
/*
* Copyright (C) 1999-2000 Id Software, Inc.
*
* q_math.c -- stateless support routines that are included in each code module
*/
#include "q_shared.h"
int nonansicast = 0;
vec3_t vec3_origin = {0,0,0};
vec3_t axisDefault[3] = { { 1, 0, 0 }, { 0, 1, 0 }, { 0, 0, 1 } };
vec4_t colorTable[CT_MAX] =
{
{0, 0, 0, 0}, /* CT_NONE */
{0, 0, 0, 1}, /* CT_BLACK */
{1, 0, 0, 1}, /* CT_RED */
{0, 1, 0, 1}, /* CT_GREEN */
{0, 0, 1, 1}, /* CT_BLUE */
{1, 1, 0, 1}, /* CT_YELLOW */
{1, 0, 1, 1}, /* CT_MAGENTA */
{0, 1, 1, 1}, /* CT_CYAN */
{0.071, 0.271, 0.29, 1}, /* CT_TEAL */
{0.529, 0.373, 0.017, 1},/* CT_GOLD */
{1, 1, 1, 1}, /* CT_WHITE */
{0.75, 0.75, 0.75, 1}, /* CT_LTGREY */
{0.50, 0.50, 0.50, 1}, /* CT_MDGREY */
{0.25, 0.25, 0.25, 1}, /* CT_DKGREY */
{0.15, 0.15, 0.15, 1}, /* CT_DKGREY2 */
{0.688, 0.797, 1, 1}, /* CT_VLTORANGE -- needs values */
{0.688, 0.797, 1, 1}, /* CT_LTORANGE */
{0.620, 0.710, 0.894, 1},/* CT_DKORANGE */
{0.463, 0.525, 0.671, 1},/* CT_VDKORANGE */
{0.616, 0.718, 0.898, 1},/* CT_VLTBLUE1 */
{0.286, 0.506, 0.898, 1},/* CT_LTBLUE1 */
{0.082, 0.388, 0.898, 1},/* CT_DKBLUE1 */
{0.063, 0.278, 0.514, 1},/* CT_VDKBLUE1 */
{0.302, 0.380, 0.612, 1},/* CT_VLTBLUE2 -- needs values */
{0.196, 0.314, 0.612, 1},/* CT_LTBLUE2 */
{0.060, 0.227, 0.611, 1},/* CT_DKBLUE2 */
{0.043, 0.161, 0.459, 1},/* CT_VDKBLUE2 */
{0.082, 0.388, 0.898, 1},/* CT_VLTBROWN1 -- needs values */
{0.082, 0.388, 0.898, 1},/* CT_LTBROWN1 */
{0.078, 0.320, 0.813, 1},/* CT_DKBROWN1 */
{0.060, 0.227, 0.611, 1},/* CT_VDKBROWN1 */
{1, 0.784, 0.365, 1}, /* CT_VLTGOLD1 -- needs values */
{1, 0.706, 0.153, 1}, /* CT_LTGOLD1 */
{0.733, 0.514, 0.086, 1},/* CT_DKGOLD1 */
{0.549, 0.384, 0.063, 1},/* CT_VDKGOLD1 */
{0.688, 0.797, 1, 1}, /* CT_VLTPURPLE1 -- needs values */
{0.688, 0.797, 1, 1}, /* CT_LTPURPLE1 */
{0.313, 0.578, 1, 1}, /* CT_DKPURPLE1 */
{0.031, 0.110, 0.341, 1},/* CT_VDKPURPLE1 */
{0.688, 0.797, 1, 1}, /* CT_VLTPURPLE2 -- needs values */
{0.688, 0.797, 1, 1}, /* CT_LTPURPLE2 */
{0.688, 0.797, 1, 1}, /* CT_DKPURPLE2 */
{0.031, 0.110, 0.341, 1},/* CT_VDKPURPLE2 */
{0.686, 0.808, 0.1, 1}, /* CT_VLTPURPLE3 */
{0.188, 0.494, 1, 1}, /* CT_LTPURPLE3 */
{0.094, 0.471, 1, 1}, /* CT_DKPURPLE3 */
{0.067, 0.325, 0.749, 1},/* CT_VDKPURPLE3 */
{1, 0.612, 0.325, 1}, /* CT_VLTRED1 */
{1, 0.478, 0.098, 1}, /* CT_LTRED1 */
{1, 0.438, 0, 1}, /* CT_DKRED1 */
{0.784, 0.329, 0, 1}, /* CT_VDKRED1 */
};
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] =
{
{-0.525731, 0.000000, 0.850651}, {-0.442863, 0.238856, 0.864188},
{-0.295242, 0.000000, 0.955423}, {-0.309017, 0.500000, 0.809017},
{-0.162460, 0.262866, 0.951056}, {0.000000, 0.000000, 1.000000},
{0.000000, 0.850651, 0.525731}, {-0.147621, 0.716567, 0.681718},
{0.147621, 0.716567, 0.681718}, {0.000000, 0.525731, 0.850651},
{0.309017, 0.500000, 0.809017}, {0.525731, 0.000000, 0.850651},
{0.295242, 0.000000, 0.955423}, {0.442863, 0.238856, 0.864188},
{0.162460, 0.262866, 0.951056}, {-0.681718, 0.147621, 0.716567},
{-0.809017, 0.309017, 0.500000},{-0.587785, 0.425325, 0.688191},
{-0.850651, 0.525731, 0.000000},{-0.864188, 0.442863, 0.238856},
{-0.716567, 0.681718, 0.147621},{-0.688191, 0.587785, 0.425325},
{-0.500000, 0.809017, 0.309017}, {-0.238856, 0.864188, 0.442863},
{-0.425325, 0.688191, 0.587785}, {-0.716567, 0.681718, -0.147621},
{-0.500000, 0.809017, -0.309017}, {-0.525731, 0.850651, 0.000000},
{0.000000, 0.850651, -0.525731}, {-0.238856, 0.864188, -0.442863},
{0.000000, 0.955423, -0.295242}, {-0.262866, 0.951056, -0.162460},
{0.000000, 1.000000, 0.000000}, {0.000000, 0.955423, 0.295242},
{-0.262866, 0.951056, 0.162460}, {0.238856, 0.864188, 0.442863},
{0.262866, 0.951056, 0.162460}, {0.500000, 0.809017, 0.309017},
{0.238856, 0.864188, -0.442863},{0.262866, 0.951056, -0.162460},
{0.500000, 0.809017, -0.309017},{0.850651, 0.525731, 0.000000},
{0.716567, 0.681718, 0.147621}, {0.716567, 0.681718, -0.147621},
{0.525731, 0.850651, 0.000000}, {0.425325, 0.688191, 0.587785},
{0.864188, 0.442863, 0.238856}, {0.688191, 0.587785, 0.425325},
{0.809017, 0.309017, 0.500000}, {0.681718, 0.147621, 0.716567},
{0.587785, 0.425325, 0.688191}, {0.955423, 0.295242, 0.000000},
{1.000000, 0.000000, 0.000000}, {0.951056, 0.162460, 0.262866},
{0.850651, -0.525731, 0.000000},{0.955423, -0.295242, 0.000000},
{0.864188, -0.442863, 0.238856}, {0.951056, -0.162460, 0.262866},
{0.809017, -0.309017, 0.500000}, {0.681718, -0.147621, 0.716567},
{0.850651, 0.000000, 0.525731}, {0.864188, 0.442863, -0.238856},
{0.809017, 0.309017, -0.500000}, {0.951056, 0.162460, -0.262866},
{0.525731, 0.000000, -0.850651}, {0.681718, 0.147621, -0.716567},
{0.681718, -0.147621, -0.716567},{0.850651, 0.000000, -0.525731},
{0.809017, -0.309017, -0.500000}, {0.864188, -0.442863, -0.238856},
{0.951056, -0.162460, -0.262866}, {0.147621, 0.716567, -0.681718},
{0.309017, 0.500000, -0.809017}, {0.425325, 0.688191, -0.587785},
{0.442863, 0.238856, -0.864188}, {0.587785, 0.425325, -0.688191},
{0.688191, 0.587785, -0.425325}, {-0.147621, 0.716567, -0.681718},
{-0.309017, 0.500000, -0.809017}, {0.000000, 0.525731, -0.850651},
{-0.525731, 0.000000, -0.850651}, {-0.442863, 0.238856, -0.864188},
{-0.295242, 0.000000, -0.955423}, {-0.162460, 0.262866, -0.951056},
{0.000000, 0.000000, -1.000000}, {0.295242, 0.000000, -0.955423},
{0.162460, 0.262866, -0.951056}, {-0.442863, -0.238856, -0.864188},
{-0.309017, -0.500000, -0.809017}, {-0.162460, -0.262866, -0.951056},
{0.000000, -0.850651, -0.525731}, {-0.147621, -0.716567, -0.681718},
{0.147621, -0.716567, -0.681718}, {0.000000, -0.525731, -0.850651},
{0.309017, -0.500000, -0.809017}, {0.442863, -0.238856, -0.864188},
{0.162460, -0.262866, -0.951056}, {0.238856, -0.864188, -0.442863},
{0.500000, -0.809017, -0.309017}, {0.425325, -0.688191, -0.587785},
{0.716567, -0.681718, -0.147621}, {0.688191, -0.587785, -0.425325},
{0.587785, -0.425325, -0.688191}, {0.000000, -0.955423, -0.295242},
{0.000000, -1.000000, 0.000000}, {0.262866, -0.951056, -0.162460},
{0.000000, -0.850651, 0.525731}, {0.000000, -0.955423, 0.295242},
{0.238856, -0.864188, 0.442863}, {0.262866, -0.951056, 0.162460},
{0.500000, -0.809017, 0.309017}, {0.716567, -0.681718, 0.147621},
{0.525731, -0.850651, 0.000000}, {-0.238856, -0.864188, -0.442863},
{-0.500000, -0.809017, -0.309017}, {-0.262866, -0.951056, -0.162460},
{-0.850651, -0.525731, 0.000000}, {-0.716567, -0.681718, -0.147621},
{-0.716567, -0.681718, 0.147621}, {-0.525731, -0.850651, 0.000000},
{-0.500000, -0.809017, 0.309017}, {-0.238856, -0.864188, 0.442863},
{-0.262866, -0.951056, 0.162460}, {-0.864188, -0.442863, 0.238856},
{-0.809017, -0.309017, 0.500000}, {-0.688191, -0.587785, 0.425325},
{-0.681718, -0.147621, 0.716567}, {-0.442863, -0.238856, 0.864188},
{-0.587785, -0.425325, 0.688191}, {-0.309017, -0.500000, 0.809017},
{-0.147621, -0.716567, 0.681718}, {-0.425325, -0.688191, 0.587785},
{-0.162460, -0.262866, 0.951056}, {0.442863, -0.238856, 0.864188},
{0.162460, -0.262866, 0.951056}, {0.309017, -0.500000, 0.809017},
{0.147621, -0.716567, 0.681718}, {0.000000, -0.525731, 0.850651},
{0.425325, -0.688191, 0.587785}, {0.587785, -0.425325, 0.688191},
{0.688191, -0.587785, 0.425325}, {-0.955423, 0.295242, 0.000000},
{-0.951056, 0.162460, 0.262866}, {-1.000000, 0.000000, 0.000000},
{-0.850651, 0.000000, 0.525731}, {-0.955423, -0.295242, 0.000000},
{-0.951056, -0.162460, 0.262866}, {-0.864188, 0.442863, -0.238856},
{-0.951056, 0.162460, -0.262866}, {-0.809017, 0.309017, -0.500000},
{-0.864188, -0.442863, -0.238856}, {-0.951056, -0.162460, -0.262866},
{-0.809017, -0.309017, -0.500000}, {-0.681718, 0.147621, -0.716567},
{-0.681718, -0.147621, -0.716567}, {-0.850651, 0.000000, -0.525731},
{-0.688191, 0.587785, -0.425325}, {-0.587785, 0.425325, -0.688191},
{-0.425325, 0.688191, -0.587785}, {-0.425325, -0.688191, -0.587785},
{-0.587785, -0.425325, -0.688191}, {-0.688191, -0.587785, -0.425325}
};
/*==============================================================*/
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 );
}
/*=======================================================*/
signed char ClampChar( int i ) {
if ( i < -128 ) {
return -128;
}
if ( i > 127 ) {
return 127;
}
return i;
}
signed short ClampShort( int i ) {
if ( i < (short)0x8000 ) {
return (short)0x8000;
}
if ( i > 0x7fff ) {
return 0x7fff;
}
return i;
}
/* this isn't a real cheap function to call! */
/**
* Converts a direction vector into a byte
*/
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;
}
/**
* Converts a byte vector into a direction vector
*/
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;
}
/*============================================================================*/
/*
* \brief 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 = 1.0F / DotProduct( normal, normal );
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];
}
/**
*
* 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] );
}
/*============================================================================ */
/*
* float q_rsqrt( float number )
*/
/**
* Fast inverse square root.
*
* \param number number to calculate the inverse square root for
* \return inverse square root of 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 */
return y;
}
float Q_fabs( float f ) {
int tmp = * ( int * ) &f;
tmp &= 0x7FFFFFFF;
return * ( float * ) &tmp;
}
//============================================================
/*
===============
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
*
* \param angle angle to normalize
* \return angle normalized to the range [0 <= angle < 360]
*
*/
float AngleNormalize360 ( float angle ) {
return (360.0 / 65536) * ((int)(angle * (65536 / 360.0)) & 65535);
}
/**
*
* AngleNormalize180
*
* \param angle angle to normalize
* \return 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
*
* \param angle1 first angle
* \param angle2 second angle
* \return 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__ && defined __i386__ && !defined C_ONLY) || defined (__WIN32__)
#if defined __LCC__ || defined C_ONLY || !id386 || defined (__WIN32__)
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];
}
}
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 VectorNormalize( vec3_t v ) {
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;
}
/*
* fast vector normalize routine that does not check to make sure
* that length != 0, nor does it return length
*/
void VectorNormalizeFast( vec3_t v )
{
float ilength;
ilength = Q_rsqrt( DotProduct( v, v ) );
v[0] *= ilength;
v[1] *= ilength;
v[2] *= ilength;
}
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)
{
ilength = 1/length;
out[0] = v[0]*ilength;
out[1] = v[1]*ilength;
out[2] = v[2]*ilength;
} else {
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 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];
}
vec_t VectorLength( const vec3_t v ) {
return 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];
}
void VectorInverse( vec3_t v ){
v[0] = -v[0];
v[1] = -v[1];
v[2] = -v[2];
}
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
** bias towards using z instead of x or y
*/
/* for ( pos = 0, i = 0; i < 3; i++ ) */
for ( pos = 0, i = 2; i >= 0; 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 );
}
/*
** flrandom
Returns a float min <= x < max (exclusive; will get max - 0.00001; but never max
*/
float flrandom(float min, float max)
{
return (((rand() & 0x7FFF) * (max - min)) / 32768.0F) + min;
}
/*
** irandom
Returns an integer min <= x <= max (ie inclusive)
*/
int irandom(int min, int max)
{
max++; /* so it can round down */
return (((rand() & 0x7FFF) * (max - min)) >> 15) + min;
}
/* use for networking - normalizes a vector, then multiplies it by 65535.0, then calls snap vector on it
guarantee's a short per vector instead of 4 bytes. */
void VectorShort(vec3_t vect)
{
VectorNormalize(vect);
vect[0] *= 8191.0;
vect[1] *= 8191.0;
vect[2] *= 8191.0;
SnapVector(vect);
}
void UnVectorShort(vec3_t vect)
{
vect[0] /= 8191.0;
vect[1] /= 8191.0;
vect[2] /= 8191.0;
}
float Q_powf( float x, int y )
{
float r = x;
for ( y--; y>0; y-- )
r = r * r;
return r;
}
/* TiM: Vector-Average. Good for calculating origins from bounding boxes */
void VectorAverage( vec3_t mins, vec3_t maxs, vec3_t result ) {
vec3_t temp;
/*int i;
for ( i = 0; i < 3; i++ ) {
result[i] = ( mins[i] + maxs[i] ) * 0.5;
}*/
/* TiM: I 'unno... this way looks l33ter lol */
VectorAdd( mins, maxs, temp );
VectorScale( temp, 0.5, result );
}
/* Rounds the argument to the next integer. Used by SnapVector. */
void init_tonextint(qboolean verbose)
{
float decimal = 0.9;
nonansicast = (int) decimal;
if(verbose)
{
if(nonansicast)
Com_Printf("Float to int casting behaviour: round to next int\n");
else
Com_Printf("Float to int casting behaviour: ISO compliant\n");
}
}
float tonextint(float x)
{
int casted;
float rest;
if(nonansicast)
return (int) x;
casted = (int) x;
rest = x - (float) casted;
if(rest >= 0.5f)
return casted+1;
else if(rest <= -0.5f)
return casted - 1;
else
return casted;
}
/**************************************
atoul
TiM - the stdlib function 'strtoul' isn't
supported by the Q3 C library.
I was thinking about converting it, but
realised since I was only using a small
part of it's functionality anyway, it'd be
quicker to write my own based off the present
code in Q3.
Based off of the atoi code
**************************************/
unsigned long atoul( const char *string )
{
unsigned long value;
int c;
/* skip whitespace */
while ( *string <= ' ' ) {
if ( !*string ) {
return 0;
}
string++;
}
/* read digits */
value = 0;
do {
c = *string++;
if ( c < '0' || c > '9' ) {
break;
}
c -= '0';
value = value * 10 + c;
} while ( 1 );
/* not handling 10e10 notation... */
return value;
}
Reference in a new issue Copy permalink