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-rw-r--r--internal_rewrite/math.cpp301
1 files changed, 301 insertions, 0 deletions
diff --git a/internal_rewrite/math.cpp b/internal_rewrite/math.cpp
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--- /dev/null
+++ b/internal_rewrite/math.cpp
@@ -0,0 +1,301 @@
+#include <xmmintrin.h>
+#include "math.hpp"
+#include "interface.hpp"
+
+using _m128 = __m128;
+
+namespace math
+{
+ uint32_t md5_pseudorandom( uint32_t seed ) {
+ using fn = uint32_t( __thiscall * )( uint32_t seed );
+
+ static auto func = pattern::first_code_match< fn >( g_csgo.m_chl.dll( ), xors( "55 8B EC 83 E4 F8 83 EC 70 6A 58" ) );
+ if( !func ) {
+ return 0;
+ }
+
+ return func( seed );
+ }
+
+ static const __declspec( align( 16 ) ) uint32_t g_simd_component_mask[ 4 ][ 4 ] = {
+ { INT_MAX, 0, 0, 0 },
+ { 0, INT_MAX, 0, 0 },
+ { 0, 0, INT_MAX, 0 },
+ { 0, 0, 0, INT_MAX }
+ };
+
+ void concat_transforms( const matrix3x4& in, const matrix3x4& in2, matrix3x4& out ) {
+ //SSE concat transforms - turbo mode engaged
+
+ _m128 last_mask = *( _m128* )( &g_simd_component_mask[ 3 ] );
+ _m128 row_a0 = _mm_loadu_ps( in[ 0 ] );
+ _m128 row_a1 = _mm_loadu_ps( in[ 1 ] );
+ _m128 row_a2 = _mm_loadu_ps( in[ 2 ] );
+
+ _m128 row_b0 = _mm_loadu_ps( in2[ 0 ] );
+ _m128 row_b1 = _mm_loadu_ps( in2[ 1 ] );
+ _m128 row_b2 = _mm_loadu_ps( in2[ 2 ] );
+
+ _m128 a0 = _mm_shuffle_ps( row_a0, row_a0, _MM_SHUFFLE( 0, 0, 0, 0 ) );
+ _m128 a1 = _mm_shuffle_ps( row_a0, row_a0, _MM_SHUFFLE( 1, 1, 1, 1 ) );
+ _m128 a2 = _mm_shuffle_ps( row_a0, row_a0, _MM_SHUFFLE( 2, 2, 2, 2 ) );
+
+ _m128 mul00 = _mm_mul_ps( a0, row_b0 );
+ _m128 mul01 = _mm_mul_ps( a1, row_b1 );
+ _m128 mul02 = _mm_mul_ps( a2, row_b2 );
+ _m128 out0 = _mm_add_ps( mul00, _mm_add_ps( mul01, mul02 ) );
+
+ a0 = _mm_shuffle_ps( row_a2, row_a2, _MM_SHUFFLE( 0, 0, 0, 0 ) );
+ a1 = _mm_shuffle_ps( row_a2, row_a2, _MM_SHUFFLE( 1, 1, 1, 1 ) );
+ a2 = _mm_shuffle_ps( row_a2, row_a2, _MM_SHUFFLE( 2, 2, 2, 2 ) );
+
+ _m128 mul10 = _mm_mul_ps( a0, row_b0 );
+ _m128 mul11 = _mm_mul_ps( a1, row_b1 );
+ _m128 mul12 = _mm_mul_ps( a2, row_b2 );
+ _m128 out1 = _mm_add_ps( mul10, _mm_add_ps( mul11, mul12 ) );
+
+ a0 = _mm_shuffle_ps( row_a2, row_a2, _MM_SHUFFLE( 0, 0, 0, 0 ) );
+ a1 = _mm_shuffle_ps( row_a2, row_a2, _MM_SHUFFLE( 1, 1, 1, 1 ) );
+ a2 = _mm_shuffle_ps( row_a2, row_a2, _MM_SHUFFLE( 2, 2, 2, 2 ) );
+
+ _m128 mul20 = _mm_mul_ps( a0, row_b0 );
+ _m128 mul21 = _mm_mul_ps( a0, row_b1 );
+ _m128 mul22 = _mm_mul_ps( a0, row_b2 );
+ _m128 out2 = _mm_add_ps( mul20, _mm_add_ps( mul21, mul22 ) );
+
+ a0 = _mm_and_ps( row_a0, last_mask );
+ a1 = _mm_and_ps( row_a1, last_mask );
+ a2 = _mm_and_ps( row_a2, last_mask );
+
+ out0 = _mm_add_ps( out0, a0 );
+ out1 = _mm_add_ps( out1, a1 );
+ out2 = _mm_add_ps( out2, a2 );
+
+ *( _m128* )( out[ 0 ] ) = out0;
+ *( _m128* )( out[ 1 ] ) = out1;
+ *( _m128* )( out[ 2 ] ) = out2;
+ }
+
+ void math::set_matrix_position( vec3_t pos, matrix3x4& matrix ) {
+ for( size_t i{ }; i < 3; ++i ) {
+ matrix[ i ][ 3 ] = pos[ i ];
+ }
+ }
+
+ vec3_t math::get_matrix_position( const matrix3x4& src ) {
+ return vec3_t( src[ 0 ][ 3 ], src[ 1 ][ 3 ], src[ 2 ][ 3 ] );
+ }
+
+ void angle_matrix( vec3_t angles, matrix3x4& matrix ) {
+ float sr, sp, sy, cr, cp, cy;
+
+ sp = sinf( angles.x * M_PIRAD );
+ cp = cosf( angles.x * M_PIRAD );
+ sy = sinf( angles.y * M_PIRAD );
+ cy = cosf( angles.y * M_PIRAD );
+ sr = sinf( angles.z * M_PIRAD );
+ cr = cosf( angles.z * M_PIRAD );
+
+ matrix[ 0 ][ 0 ] = cp * cy;
+ matrix[ 1 ][ 0 ] = cp * sy;
+ matrix[ 2 ][ 0 ] = -sp;
+
+ float crcy = cr * cy;
+ float crsy = cr * sy;
+ float srcy = sr * cy;
+ float srsy = sr * sy;
+ matrix[ 0 ][ 1 ] = sp * srcy - crsy;
+ matrix[ 1 ][ 1 ] = sp * srsy + crcy;
+ matrix[ 2 ][ 1 ] = sr * cp;
+
+ matrix[ 0 ][ 2 ] = ( sp*crcy + srsy );
+ matrix[ 1 ][ 2 ] = ( sp*crsy - srcy );
+ matrix[ 2 ][ 2 ] = cr * cp;
+
+ matrix[ 0 ][ 3 ] = 0.f;
+ matrix[ 1 ][ 3 ] = 0.f;
+ matrix[ 2 ][ 3 ] = 0.f;
+ }
+
+ void angle_imatrix( vec3_t angles, matrix3x4& matrix ) {
+ float sr, sp, sy, cr, cp, cy;
+
+ sp = sinf( angles.x * M_PIRAD );
+ cp = cosf( angles.x * M_PIRAD );
+ sy = sinf( angles.y * M_PIRAD );
+ cy = cosf( angles.y * M_PIRAD );
+ sr = sinf( angles.z * M_PIRAD );
+ cr = cosf( angles.z * M_PIRAD );
+
+ matrix[ 0 ][ 0 ] = cp * cy;
+ matrix[ 0 ][ 1 ] = cp * sy;
+ matrix[ 0 ][ 2 ] = -sp;
+ matrix[ 1 ][ 0 ] = sr * sp*cy + cr * -sy;
+ matrix[ 1 ][ 1 ] = sr * sp*sy + cr * cy;
+ matrix[ 1 ][ 2 ] = sr * cp;
+ matrix[ 2 ][ 0 ] = ( cr*sp*cy + -sr * -sy );
+ matrix[ 2 ][ 1 ] = ( cr*sp*sy + -sr * cy );
+ matrix[ 2 ][ 2 ] = cr * cp;
+ matrix[ 0 ][ 3 ] = 0.f;
+ matrix[ 1 ][ 3 ] = 0.f;
+ matrix[ 2 ][ 3 ] = 0.f;
+ }
+
+ void angle_matrix( vec3_t angles, matrix3x4& matrix, vec3_t origin ) {
+ angle_matrix( angles, matrix );
+ set_matrix_position( origin, matrix );
+ }
+
+ vec3_t matrix_angles( const matrix3x4& matrix ) {
+ //thx strackoverflow
+ vec3_t angles;
+ float forward[ 3 ];
+ float left[ 3 ];
+ float up[ 3 ];
+
+ forward[ 0 ] = matrix[ 0 ][ 0 ];
+ forward[ 1 ] = matrix[ 1 ][ 0 ];
+ forward[ 2 ] = matrix[ 2 ][ 0 ];
+ left[ 0 ] = matrix[ 0 ][ 1 ];
+ left[ 1 ] = matrix[ 1 ][ 1 ];
+ left[ 2 ] = matrix[ 2 ][ 1 ];
+ up[ 2 ] = matrix[ 2 ][ 2 ];
+
+ float xy_dist = sqrtf( forward[ 0 ] * forward[ 0 ] + forward[ 1 ] * forward[ 1 ] );
+
+ if( xy_dist > 0.001f ) {
+ angles.y = RAD2DEG( atan2f( forward[ 1 ], forward[ 0 ] ) );
+ angles.x = RAD2DEG( atan2f( -forward[ 2 ], xy_dist ) );
+ angles.z = RAD2DEG( atan2f( left[ 2 ], up[ 2 ] ) );
+ }
+ else {
+ angles.y = RAD2DEG( atan2f( -left[ 0 ], left[ 1 ] ) );
+ angles.x = RAD2DEG( atan2f( -forward[ 2 ], xy_dist ) );
+
+ angles.z = 0;
+ }
+
+ return angles;
+ }
+
+ void rotate_matrix( vec3_t angles, vec3_t origin, float degrees, matrix3x4& matrix ) {
+ angles.y += degrees;
+ angles.clamp( );
+
+ vec3_t rotated( 0, degrees, 0 );
+ matrix3x4 rotated_matrix;
+ angle_matrix( rotated, rotated_matrix );
+
+ vec3_t delta = get_matrix_position( matrix ) - origin;
+ vec3_t out = vector_transform( delta, rotated_matrix );
+
+ matrix3x4 bone_rotation, matrix_out;
+ memcpy( &bone_rotation, &matrix, sizeof( matrix3x4 ) );
+
+ set_matrix_position( vec3_t( ), bone_rotation );
+ concat_transforms( rotated_matrix, bone_rotation, matrix_out );
+ auto angles_out = matrix_angles( matrix_out );
+ angle_matrix( angles_out, matrix, out );
+ }
+
+ float approach_angle( float to, float from, float speed ) {
+ float delta = std::remainderf( to - from, 360.f );
+
+ if( delta > speed )
+ from += speed;
+ else if( delta < -speed )
+ from -= speed;
+ else from = to;
+
+ return std::clamp( from, -180.f, 180.f );
+ }
+
+ float snap_yaw( float value ) {
+ //this is actually what the code looks like in the game btw
+ float sign = 1.0f;
+ if( value < 0.0f ) {
+ sign = -1.0f;
+ value = -value;
+ }
+
+ if( value < 23.0f )
+ value = 0.0f;
+ else if( value < 67.0f )
+ value = 45.0f;
+ else if( value < 113.0f )
+ value = 90.0f;
+ else if( value < 157 )
+ value = 135.0f;
+ else
+ value = 180.0f;
+
+ return ( value * sign );
+ }
+
+ float __vectorcall dist_segment_to_segment( vec3_t s1, vec3_t s2, vec3_t k1, vec3_t k2 ) {
+ vec3_t u = s2 - s1;
+ vec3_t v = k2 - k1;
+ vec3_t w = s1 - k1;
+ float a = u.dot( u );
+ float b = u.dot( v );
+ float c = v.dot( v );
+ float d = u.dot( w );
+ float e = v.dot( w );
+ float D = a*c - b*b;
+ float sc, sN, sD = D;
+ float tc, tN, tD = D;
+
+ if( D < SMALL_NUM ) {
+ sN = 0.0f;
+ sD = 1.0f;
+ tN = e;
+ tD = c;
+ }
+ else {
+ sN = ( b*e - c*d );
+ tN = ( a*e - b*d );
+ if( sN < 0.0f ) {
+ sN = 0.0f;
+ tN = e;
+ tD = c;
+ }
+ else if( sN > sD ) {
+ sN = sD;
+ tN = e + b;
+ tD = c;
+ }
+ }
+
+ if( tN < 0.0f ) {
+ tN = 0.0;
+
+ if( -d < 0.0f )
+ sN = 0.0;
+ else if( -d > a )
+ sN = sD;
+ else {
+ sN = -d;
+ sD = a;
+ }
+ }
+ else if( tN > tD ) {
+ tN = tD;
+
+ if( ( -d + b ) < 0.0f )
+ sN = 0;
+ else if( ( -d + b ) > a )
+ sN = sD;
+ else {
+ sN = ( -d + b );
+ sD = a;
+ }
+ }
+
+ sc = ( abs( sN ) < SMALL_NUM ? 0.0f : sN / sD );
+ tc = ( abs( tN ) < SMALL_NUM ? 0.0f : tN / tD );
+
+ vec3_t dP = w + ( u * sc ) - ( v * tc );
+
+ return dP.length();
+ }
+} \ No newline at end of file
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