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d3dx8: Only the points in the positive ray are taken in account in D3DXSphereBoundProbe.

This commit is contained in:
David Adam 2008-07-28 18:32:55 +02:00 committed by Alexandre Julliard
parent 278f806ab7
commit 170023e30d
2 changed files with 7 additions and 2 deletions
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5
dlls/d3dx8/mesh.c
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@ -27,13 +27,14 @@ WINE_DEFAULT_DEBUG_CHANNEL(d3dx);
BOOL WINAPI D3DXSphereBoundProbe(CONST D3DXVECTOR3 *pcenter, FLOAT radius, CONST D3DXVECTOR3 *prayposition, CONST D3DXVECTOR3 *praydirection)
{
D3DXVECTOR3 difference;
FLOAT a, b, c;
FLOAT a, b, c, d;
a = D3DXVec3LengthSq(praydirection);
if (!D3DXVec3Subtract(&difference, prayposition, pcenter)) return FALSE;
b = D3DXVec3Dot(&difference, praydirection);
c = D3DXVec3LengthSq(&difference) - radius * radius;
d = b * b - a * c;
if ( b * b - a * c <= 0.0f ) return FALSE;
if ( ( d <= 0.0f ) || ( sqrt(d) <= b ) ) return FALSE;
return TRUE;
}

4
dlls/d3dx8/tests/mesh.c
View File

@ -36,6 +36,10 @@ static void D3DXBoundProbeTest(void)
result = D3DXSphereBoundProbe(&center, radius, &rayposition, &raydirection);
ok(result == TRUE, "expected TRUE, received FALSE\n");
rayposition.x = 45.0f; rayposition.y = -75.0f; rayposition.z = 49.0f;
result = D3DXSphereBoundProbe(&center, radius, &rayposition, &raydirection);
ok(result == FALSE, "expected FALSE, received TRUE\n");
rayposition.x = 5.0f; rayposition.y = 7.0f; rayposition.z = 9.0f;
result = D3DXSphereBoundProbe(&center, radius, &rayposition, &raydirection);
ok(result == FALSE, "expected FALSE, received TRUE\n");