public MeshCollisionTester(Mesh mesh)
{
_mesh = mesh;
if (_mesh == null)
{
throw new Exception("Mesh cannot be null");
}
}
public virtual Mesh CopyMesh()
{
var ret = new Mesh();
CopyDataFrom(ret);
return ret;
}
public virtual void CopyDataFrom(Mesh target)
{
foreach (var meshTriangle in target.Triangles)
AddTriangle(meshTriangle);
Translation = target.Translation;
Rotation = target.Rotation;
}
private MeshCollisionResult CollideWithRay(Mesh target, Vector3 point, Vector3 direction)
{
var translatedPoint = point - target.Translation;
int triangleCount;
var triangles = target.GetAllTriangles(out triangleCount);
if (triangleCount > 50)
return CollideInParallel(triangles, translatedPoint, direction);
return CollideInSeries(triangles, translatedPoint, direction);
}
private MeshCollisionResult CollideWithLineSegment(Mesh target, Vector3 point, Vector3 direction, float distanceSquared)
{
var result = CollideWithRay(target, point, direction);
if (result.RayCollisionResult.HasCollided)
{
var colDistanceSqr = result.RayCollisionResult.CollisionPoint.DistanceSquared(point);
if (colDistanceSqr < distanceSquared)
return result;
}
return new MeshCollisionResult(new CollisionResult { HasCollided = false }, 0);
}
