public override bool PreciseIntersect(ref SSRay worldSpaceRay, ref float distanceAlongRay)
{
SSRay localRay = worldSpaceRay.Transformed(this.worldMat.Inverted());
SSAbstractMesh mesh = this._mesh;
bool hit = false;
float localNearestContact = float.MaxValue;
if (mesh == null)
{
return(true); // no mesh to test
}
else
{
// precise meshIntersect
bool global_hit = mesh.TraverseTriangles((state, V1, V2, V3) => {
float contact;
if (OpenTKHelper.TriangleRayIntersectionTest(V1, V2, V3, localRay.pos, localRay.dir, out contact))
{
hit = true;
localNearestContact = Math.Min(localNearestContact, contact);
Console.WriteLine("Triangle Hit @ {0} : Object {1}", contact, Name);
}
return(false); // don't short circuit
});
if (hit)
{
float worldSpaceContactDistance = -localNearestContact * this.Scale.LengthFast;
Console.WriteLine("Nearest Triangle Hit @ {0} vs Sphere {1} : Object {2}", worldSpaceContactDistance, distanceAlongRay, Name);
distanceAlongRay = worldSpaceContactDistance;
}
return(global_hit || hit);
}
}
protected bool _perInstanceIntersectionTest(SSAbstractMesh abstrMesh, int i,
ref SSRay localRay, out float localContact)
{
var pos = instanceData.readPosition(i);
var masterScale = instanceData.readMasterScale(i);
var scale = instanceData.readComponentScale(i) * masterScale;
if (abstrMesh == null)
{
// no way to be any more precise except hitting a generic sphere
float radius = Math.Max(scale.Z, Math.Max(scale.X, scale.Y));
var sphere = new SSSphere(pos, radius);
return(sphere.IntersectsRay(ref localRay, out localContact));
}
else
{
// When using SSAbstractMesh we can invoke its preciseIntersect()
Matrix4 instanceMat = Matrix4.CreateScale(scale) * Matrix4.CreateTranslation(pos);
SSRay instanceRay = localRay.Transformed(instanceMat.Inverted());
float instanceContact;
if (abstrMesh.preciseIntersect(ref instanceRay, out instanceContact))
{
Vector3 instanceContactPt = instanceRay.pos + instanceContact * instanceRay.dir;
Vector3 localContactPt = Vector3.Transform(instanceContactPt, instanceMat);
localContact = (localContactPt - localRay.pos).Length;
return(true);
}
else
{
localContact = float.PositiveInfinity;
return(false);
}
}
}
public SSObjectMesh(SSAbstractMesh mesh) : this()
{
this.Mesh = mesh;
this.renderState.castsShadow = true; // SSObjectMesh casts shadow by default
this.renderState.receivesShadows = true; // SSObjectMesh receives shadow by default
_setupMesh();
}
public SSObjectMesh(SSAbstractMesh mesh)
: this()
{
this.Mesh = mesh;
this.renderState.castsShadow = true; // SSObjectMesh casts shadow by default
this.renderState.receivesShadows = true; // SSObjectMesh receives shadow by default
_setupMesh ();
}
public SSObjectBillboard(SSAbstractMesh mesh, bool enableOcclusionTest = false)
{
Mesh = mesh;
isOcclusionQueueryEnabled = enableOcclusionTest;
if (isOcclusionQueueryEnabled) {
GL_query_id = GL.GenQuery();
}
}
public SSObjectBillboard(SSAbstractMesh mesh, bool enableOcclusionTest = false)
{
Mesh = mesh;
isOcclusionQueueryEnabled = enableOcclusionTest;
if (isOcclusionQueueryEnabled)
{
GL_query_id = GL.GenQuery();
}
}
public SSObjectMesh(SSAbstractMesh mesh) : this()
{
this.Mesh = mesh;
this.renderState.castsShadow = true; // SSObjectMesh casts shadow by default
}
public override bool PreciseIntersect(ref SSRay worldSpaceRay, ref float distanceAlongRay)
{
SSRay localRay = worldSpaceRay.Transformed(this.worldMat.Inverted());
SSAbstractMesh abstrMesh = this.mesh as SSAbstractMesh;
float nearestLocalRayContact = float.PositiveInfinity;
if (useBVHForIntersections)
{
if (_bvh == null)
{
_bvh = new SSInstanceBVH(this.instanceData);
for (int i = 0; i < instanceData.activeBlockLength; ++i)
{
if (instanceData.isValid(i))
{
_bvh.addObject(i);
}
}
}
List <ssBVHNode <int> > nodesHit = _bvh.traverseRay(localRay);
foreach (var node in nodesHit)
{
if (!node.IsLeaf)
{
continue;
}
foreach (int i in node.gobjects)
{
if (!instanceData.isValid(i))
{
continue;
}
float localContact;
if (_perInstanceIntersectionTest(abstrMesh, i, ref localRay, out localContact))
{
if (localContact < nearestLocalRayContact)
{
nearestLocalRayContact = localContact;
}
}
}
}
}
else
{
// no BVH is used
for (int i = 0; i < instanceData.activeBlockLength; ++i)
{
if (!instanceData.isValid(i))
{
continue;
}
float localContact;
if (_perInstanceIntersectionTest(abstrMesh, i, ref localRay, out localContact))
{
if (localContact < nearestLocalRayContact)
{
nearestLocalRayContact = localContact;
}
}
}
}
if (nearestLocalRayContact < float.PositiveInfinity)
{
Vector3 localContactPt = localRay.pos + nearestLocalRayContact * localRay.dir;
Vector3 worldContactPt = Vector3.Transform(localContactPt, this.worldMat);
distanceAlongRay = (worldContactPt - worldSpaceRay.pos).Length;
return(true);
}
else
{
distanceAlongRay = float.PositiveInfinity;
return(false);
}
}
public SSObjectMeshSky(SSAbstractMesh mesh) : base(mesh)
{
}
public SSObjectMeshSky(SSAbstractMesh mesh)
: base(mesh)
{
}
public SSObjectOcclusionQueuery(SSAbstractMesh mesh)
{
Mesh = mesh;
_gl_query_id = GL.GenQuery();
}
public SSObjectOcclusionQueuery(SSAbstractMesh mesh)
{
Mesh = mesh;
_gl_query_id = GL.GenQuery();
}
