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NormalSideOfPlane matching

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Dethrace Labs 2025-09-08 10:04:53 +12:00 committed by Dethrace Engineering Department
parent 5f2983273f
commit b4a5e408a5
1 changed files with 11 additions and 4 deletions
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15
src/DETHRACE/common/utility.c
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@ -1026,9 +1026,13 @@ void DRMatrix34TApplyP(br_vector3* pA, br_vector3* pB, br_matrix34* pC) {
br_scalar t2;
br_scalar t3;
t1 = pB->v[0] - pC->m[3][0];
t2 = pB->v[1] - pC->m[3][1];
t3 = pB->v[2] - pC->m[3][2];
t1 = BR_SUB(pB->v[0], pC->m[3][0]);
t2 = BR_SUB(pB->v[1], pC->m[3][1]);
t3 = BR_SUB(pB->v[2], pC->m[3][2]);
// this avoids the +fstp in the line above, but including the "add" breaks it again. Some combination of braces etc...
// pA->v[0] = BR_MUL(pC->m[0][2], t3);
pA->v[0] = pC->m[0][2] * t3 + pC->m[0][1] * t2 + pC->m[0][0] * t1;
pA->v[1] = pC->m[1][0] * t1 + pC->m[1][2] * t3 + pC->m[1][1] * t2;
pA->v[2] = pC->m[2][0] * t1 + pC->m[2][1] * t2 + pC->m[2][2] * t3;
@ -1345,7 +1349,10 @@ int NormalSideOfPlane(br_vector3* pPoint, br_vector3* pNormal, br_scalar pD) {
br_scalar numer;
br_scalar denom;
return (BrVector3Dot(pNormal, pPoint) - pD) >= 0.f;
// numer = BR_MUL(pPoint->v[1], pNormal->v[1]) + BR_MUL(pPoint->v[2], pNormal->v[2]); // + BR_MUL(pNormal->v[0], pPoint->v[0]) - pD;
numer = pNormal->v[1] * pPoint->v[1] + pNormal->v[2] * pPoint->v[2] + pNormal->v[0] * pPoint->v[0] - pD;
denom = BR_SQR(pNormal->v[2]) + BR_SQR(pNormal->v[1]) + BR_SQR(pNormal->v[0]);
return denom * numer >= 0.0f;
}
// IDA: br_material* __usercall DRMaterialClone@<EAX>(br_material *pMaterial@<EAX>)