static public CullingResult Cull(ref WorldBounds bounds, ref Frustum f)
{
int mall = 0;
for (int i = 0; i < f.PlanesCount; i++)
{
float4 plane = f.GetPlane(i);
int m = IsCulled(bounds.c000, plane) ? 1 : 0;
m |= IsCulled(bounds.c001, plane) ? 2 : 0;
m |= IsCulled(bounds.c010, plane) ? 4 : 0;
m |= IsCulled(bounds.c011, plane) ? 8 : 0;
m |= IsCulled(bounds.c100, plane) ? 16 : 0;
m |= IsCulled(bounds.c101, plane) ? 32 : 0;
m |= IsCulled(bounds.c110, plane) ? 64 : 0;
m |= IsCulled(bounds.c111, plane) ? 128 : 0;
if (m == 255)
{
return(CullingResult.Outside); // all points outside one plane
}
mall |= m;
}
if (mall == 0)
{
return(CullingResult.Inside); // all points inside all planes
}
return(CullingResult.Intersects);
}
static public void WorldBoundsToAxisAligned(ref WorldBounds wBounds, out AABB aab)
{
float3 bbMin = wBounds.c000;
float3 bbMax = wBounds.c000;
GrowBounds(ref bbMin, ref bbMax, in wBounds);
aab.Center = (bbMax + bbMin) * .5f;
aab.Extents = (bbMax - bbMin) * .5f;
}
static public bool PointInBounds(ref WorldBounds bounds, float3 p)
{
float4 pfront = PlaneFromTri(bounds.c000, bounds.c001, bounds.c011);
if (IsCulled(p, pfront))
{
return(false);
}
float4 pback = PlaneFromTri(bounds.c100, bounds.c111, bounds.c101);
if (IsCulled(p, pback))
{
return(false);
}
// etc TODO
Assert.IsTrue(false);
return(true);
}
static public bool IsCulled(ref WorldBounds bounds, ref Frustum f)
{
// if all vertices are completely outside of one culling plane, the object is culled
for (int i = 0; i < f.PlanesCount; i++)
{
float4 plane = f.GetPlane(i);
if (IsCulled8(bounds.c000, bounds.c001, bounds.c011, bounds.c010,
bounds.c100, bounds.c101, bounds.c111, bounds.c110, plane))
{
return(true);
}
}
return(false);
/* reference
* bool r = false;
* bgfx.dbg_text_clear(0, false);
* for (int i = 0; i < 6; i++) {
* float4 plane = f.GetPlane(i);
* int m = IsCulled(bounds.c000, plane) ? 1 : 0;
* m |= IsCulled(bounds.c001, plane) ? 2 : 0;
* m |= IsCulled(bounds.c010, plane) ? 4 : 0;
* m |= IsCulled(bounds.c011, plane) ? 8 : 0;
* m |= IsCulled(bounds.c100, plane) ? 16 : 0;
* m |= IsCulled(bounds.c101, plane) ? 32 : 0;
* m |= IsCulled(bounds.c110, plane) ? 64 : 0;
* m |= IsCulled(bounds.c111, plane) ? 128 : 0;
* if (m == 255) r = true;
*
* string s = StringFormatter.Format("{0}: {1} {2} ", i, m, plane);
* bgfx.dbg_text_printf(0, (ushort)i, 0xf0, s, null);
*
* //if (IsCulled8(bounds.c000, bounds.c001, bounds.c011, bounds.c010,
* // bounds.c100, bounds.c101, bounds.c111, bounds.c110, plane))
* // return true;
* }
* bgfx.set_debug((uint)bgfx.DebugFlags.Text);
* return r;
*/
}
// modifies bounds1 with results
static public void MergeBounds(ref WorldBounds bounds1, ref WorldBounds bounds2)
{
// TODO
Assert.IsTrue(false);
}
static public void AxisAlignedToWorldBounds(ref float4x4 tx, ref AABB aaBounds, out WorldBounds wBounds)
{
float3 o = math.mul(tx, new float4(aaBounds.Min, 1)).xyz;
float3 dx = math.mul(tx, new float4(aaBounds.Size.x, 0, 0, 0)).xyz;
float3 dy = math.mul(tx, new float4(0, aaBounds.Size.y, 0, 0)).xyz;
float3 dz = math.mul(tx, new float4(0, 0, aaBounds.Size.z, 0)).xyz;
wBounds.c000 = o;
wBounds.c001 = o + dx;
wBounds.c011 = o + dx + dy;
wBounds.c010 = o + dy;
wBounds.c100 = o + dz;
wBounds.c101 = o + dz + dx;
wBounds.c111 = o + dz + dx + dy;
wBounds.c110 = o + dz + dy;
}
