//--------------------------------------------------------------------------------------
// Test collisions between pairs of collision objects using XNACollision functions
//--------------------------------------------------------------------------------------
void Collide()
{
// test collisions between objects and frustum
g_SecondarySpheres[0].collision = g_PrimaryFrustum.Contains( g_SecondarySpheres[0].sphere );
g_SecondaryOrientedBoxes[0].collision = g_PrimaryFrustum.Contains( g_SecondaryOrientedBoxes[0].obox );
g_SecondaryAABoxes[0].collision = g_PrimaryFrustum.Contains( g_SecondaryAABoxes[0].aabox );
g_SecondaryTriangles[0].collision = g_PrimaryFrustum.Contains( g_SecondaryTriangles[0].pointa,
g_SecondaryTriangles[0].pointb,
g_SecondaryTriangles[0].pointc );
// test collisions between objects and aligned box
g_SecondarySpheres[1].collision = g_PrimaryAABox.Contains( g_SecondarySpheres[1].sphere );
g_SecondaryOrientedBoxes[1].collision = g_PrimaryAABox.Contains( g_SecondaryOrientedBoxes[1].obox );
g_SecondaryAABoxes[1].collision = g_PrimaryAABox.Contains( g_SecondaryAABoxes[1].aabox );
g_SecondaryTriangles[1].collision = g_PrimaryAABox.Contains( g_SecondaryTriangles[1].pointa,
g_SecondaryTriangles[1].pointb,
g_SecondaryTriangles[1].pointc );
// test collisions between objects and oriented box
g_SecondarySpheres[2].collision = g_PrimaryOrientedBox.Contains( g_SecondarySpheres[2].sphere );
g_SecondaryOrientedBoxes[2].collision = g_PrimaryOrientedBox.Contains( g_SecondaryOrientedBoxes[2].obox );
g_SecondaryAABoxes[2].collision = g_PrimaryOrientedBox.Contains( g_SecondaryAABoxes[2].aabox );
g_SecondaryTriangles[2].collision = g_PrimaryOrientedBox.Contains( g_SecondaryTriangles[2].pointa,
g_SecondaryTriangles[2].pointb,
g_SecondaryTriangles[2].pointc );
// test collisions between objects and ray
float fDistance = -1.0f;
float fDist;
if ( g_SecondarySpheres[3].sphere.Intersects( g_PrimaryRay.origin, g_PrimaryRay.direction, fDist ) )
{
fDistance = fDist;
g_SecondarySpheres[3].collision = INTERSECTS;
}
else
g_SecondarySpheres[3].collision = DISJOINT;
if ( g_SecondaryOrientedBoxes[3].obox.Intersects( g_PrimaryRay.origin, g_PrimaryRay.direction, fDist ) )
{
fDistance = fDist;
g_SecondaryOrientedBoxes[3].collision = INTERSECTS;
}
else
g_SecondaryOrientedBoxes[3].collision = DISJOINT;
if ( g_SecondaryAABoxes[3].aabox.Intersects( g_PrimaryRay.origin, g_PrimaryRay.direction, fDist ) )
{
fDistance = fDist;
g_SecondaryAABoxes[3].collision = INTERSECTS;
}
else
g_SecondaryAABoxes[3].collision = DISJOINT;
if ( TriangleTests::Intersects( g_PrimaryRay.origin, g_PrimaryRay.direction,
g_SecondaryTriangles[3].pointa,
g_SecondaryTriangles[3].pointb,
g_SecondaryTriangles[3].pointc,
fDist ) )
{
fDistance = fDist;
g_SecondaryTriangles[3].collision = INTERSECTS;
}
else
g_SecondaryTriangles[3].collision = DISJOINT;
// If one of the ray intersection tests was successful, fDistance will be positive.
// If so, compute the intersection location and store it in g_RayHitResultBox.
if( fDistance > 0 )
{
// The primary ray's direction is assumed to be normalized.
XMVECTOR HitLocation = XMVectorMultiplyAdd( g_PrimaryRay.direction, XMVectorReplicate( fDistance ),
g_PrimaryRay.origin );
XMStoreFloat3( &g_RayHitResultBox.aabox.Center, HitLocation );
g_RayHitResultBox.collision = INTERSECTS;
}
else
{
g_RayHitResultBox.collision = DISJOINT;
}
}
