mirror of
https://github.com/blawar/GLideN64.git
synced 2024-06-25 22:09:35 +00:00
146 lines
4.4 KiB
C++
146 lines
4.4 KiB
C++
#include <math.h>
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#include "3DMath.h"
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void MultMatrix(float m0[4][4], float m1[4][4], float dest[4][4])
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{
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int i;
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for (i = 0; i < 4; i++)
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{
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dest[0][i] = m0[0][i]*m1[0][0] + m0[1][i]*m1[0][1] + m0[2][i]*m1[0][2] + m0[3][i]*m1[0][3];
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dest[1][i] = m0[0][i]*m1[1][0] + m0[1][i]*m1[1][1] + m0[2][i]*m1[1][2] + m0[3][i]*m1[1][3];
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dest[2][i] = m0[0][i]*m1[2][0] + m0[1][i]*m1[2][1] + m0[2][i]*m1[2][2] + m0[3][i]*m1[2][3];
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dest[3][i] = m0[3][i]*m1[3][3] + m0[2][i]*m1[3][2] + m0[1][i]*m1[3][1] + m0[0][i]*m1[3][0];
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}
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}
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void MultMatrix2(float m0[4][4], float m1[4][4])
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{
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float dst[4][4];
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MultMatrix(m0, m1, dst);
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memcpy( m0, dst, sizeof(float) * 16 );
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}
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void TransformVectorNormalize(float vec[3], float mtx[4][4])
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{
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float vres[3];
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vres[0] = mtx[0][0] * vec[0] + mtx[1][0] * vec[1] + mtx[2][0] * vec[2];
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vres[1] = mtx[0][1] * vec[0] + mtx[1][1] * vec[1] + mtx[2][1] * vec[2];
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vres[2] = mtx[0][2] * vec[0] + mtx[1][2] * vec[1] + mtx[2][2] * vec[2];
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vec[0] = vres[0];
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vec[1] = vres[1];
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vec[2] = vres[2];
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Normalize(vec);
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}
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void InverseTransformVectorNormalize(float src[3], float dst[3], float mtx[4][4])
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{
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dst[0] = mtx[0][0] * src[0] + mtx[0][1] * src[1] + mtx[0][2] * src[2];
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dst[1] = mtx[1][0] * src[0] + mtx[1][1] * src[1] + mtx[1][2] * src[2];
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dst[2] = mtx[2][0] * src[0] + mtx[2][1] * src[1] + mtx[2][2] * src[2];
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Normalize(dst);
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}
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void Normalize(float v[3])
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{
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#ifdef WIN32_ASM
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__asm {
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mov esi, dword ptr [v]
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// ST(6) ST(5) ST(4) ST(3) ST(2) ST(1) ST
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fld dword ptr [esi+08h] // v2
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fld dword ptr [esi+04h] // v2 v1
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fld dword ptr [esi] // v2 v1 v0
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fld1 // v2 v1 v0 1.0
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fld ST(3) // v2 v1 v0 1.0 v2
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fmul ST, ST // v2 v1 v0 1.0 v2*v2
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fld ST(3) // v2 v1 v0 1.0 v2*v2 v1
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fmul ST, ST // v2 v1 v0 1.0 v2*v2 v1*v1
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fld ST(3) // v2 v1 v0 1.0 v2*v2 v1*v1 v0
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fmul ST, ST // v2 v1 v0 1.0 v2*v2 v1*v1 v0*v0
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fadd // v2 v1 v0 1.0 v2*v2 v1*v1+v0*v0
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fadd // v2 v1 v0 1.0 v2*v2+v1*v1+v0*v0
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ftst // Compare ST to 0
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fstsw ax // Store FPU status word in ax
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sahf // Transfer ax to flags register
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jz End // Skip if length is zero
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fsqrt // v2 v1 v0 1.0 len
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fdiv // v2 v1 v0 1.0/len
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fmul ST(3), ST // v2*(1.0/len) v1 v0 1.0/len
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fmul ST(2), ST // v2*(1.0/len) v1*(1.0/len) v0 1.0/len
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fmul // v2*(1.0/len) v1*(1.0/len) v0*(1.0/len)
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fstp dword ptr [esi] // v2*(1.0/len) v1*(1.0/len)
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fstp dword ptr [esi+04h] // v2*(1.0/len)
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fstp dword ptr [esi+08h] //
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End:
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finit
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}
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#else // WIN32_ASM
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float len;
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len = v[0]*v[0] + v[1]*v[1] + v[2]*v[2];
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if (len != 0.0) {
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len = sqrtf( len );
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v[0] /= len;
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v[1] /= len;
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v[2] /= len;
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}
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#endif // WIN32_ASM
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}
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void InverseTransformVectorNormalizeN(float src[][3], float dst[][3], float mtx[4][4], u32 count)
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{
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for (u32 i = 0; i < count; i++)
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{
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InverseTransformVectorNormalize((float(*))src[i], (float(*))dst[i], mtx);
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}
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}
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void CopyMatrix( float m0[4][4], float m1[4][4] )
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{
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#ifdef WIN32_ASM
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__asm {
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mov esi, [m1]
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mov edi, [m0]
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mov eax, dword ptr [esi+00h]
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mov dword ptr [edi+00h], eax
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mov eax, dword ptr [esi+04h]
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mov dword ptr [edi+04h], eax
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mov eax, dword ptr [esi+08h]
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mov dword ptr [edi+08h], eax
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mov eax, dword ptr [esi+0Ch]
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mov dword ptr [edi+0Ch], eax
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mov eax, dword ptr [esi+10h]
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mov dword ptr [edi+10h], eax
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mov eax, dword ptr [esi+14h]
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mov dword ptr [edi+14h], eax
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mov eax, dword ptr [esi+18h]
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mov dword ptr [edi+18h], eax
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mov eax, dword ptr [esi+1Ch]
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mov dword ptr [edi+1Ch], eax
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mov eax, dword ptr [esi+20h]
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mov dword ptr [edi+20h], eax
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mov eax, dword ptr [esi+24h]
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mov dword ptr [edi+24h], eax
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mov eax, dword ptr [esi+28h]
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mov dword ptr [edi+28h], eax
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mov eax, dword ptr [esi+2Ch]
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mov dword ptr [edi+2Ch], eax
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mov eax, dword ptr [esi+30h]
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mov dword ptr [edi+30h], eax
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mov eax, dword ptr [esi+34h]
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mov dword ptr [edi+34h], eax
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mov eax, dword ptr [esi+38h]
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mov dword ptr [edi+38h], eax
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mov eax, dword ptr [esi+3Ch]
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mov dword ptr [edi+3Ch], eax
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}
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#else
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memcpy( m0, m1, 16 * sizeof( float ) );
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#endif // WIN32_ASM
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}
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