/// <summary>
/// Calculates exact intersection point (in uniform grid coordinates) from stored havok's hit info object obtained during FindClosest grid.
/// Returns position of intersected object in uniform grid coordinates.
/// </summary>
protected Vector3D?GetIntersectedBlockData(ref MatrixD inverseGridWorldMatrix, out Vector3D intersection, out MySlimBlock intersectedBlock, out ushort?compoundBlockId)
{
Debug.Assert(m_hitInfo != null);
Debug.Assert(m_hitInfo.Value.HkHitInfo.Body.GetEntity() == CurrentGrid);
intersection = Vector3D.Zero;
intersectedBlock = null;
compoundBlockId = null;
double distance = double.MaxValue;
Vector3D?intersectedObjectPos = null;
var line = new LineD(IntersectionStart, IntersectionStart + IntersectionDirection * IntersectionDistance);
Vector3I position = Vector3I.Zero;
if (!CurrentGrid.GetLineIntersectionExactGrid(ref line, ref position, ref distance, m_hitInfo.Value))
{
return(null);
}
distance = Math.Sqrt(distance);
intersectedObjectPos = position;
intersectedBlock = CurrentGrid.GetCubeBlock(position);
if (intersectedBlock == null)
{
return(null);
}
// Compound block - get index of internal block for removing
if (intersectedBlock.FatBlock is MyCompoundCubeBlock)
{
MyCompoundCubeBlock compoundBlock = intersectedBlock.FatBlock as MyCompoundCubeBlock;
ushort?idInCompound = null;
ushort blockId;
MyIntersectionResultLineTriangleEx?triIntersection;
if (compoundBlock.GetIntersectionWithLine(ref line, out triIntersection, out blockId))
{
idInCompound = blockId;
}
else if (compoundBlock.GetBlocksCount() == 1) // If not intersecting with any internal block and there is only one then set the index to it
{
idInCompound = compoundBlock.GetBlockId(compoundBlock.GetBlocks()[0]);
}
compoundBlockId = idInCompound;
}
Debug.Assert(intersectedObjectPos != null);
Vector3D rayStart = Vector3D.Transform(IntersectionStart, inverseGridWorldMatrix);
Vector3D rayDir = Vector3D.Normalize(Vector3D.TransformNormal(IntersectionDirection, inverseGridWorldMatrix));
intersection = rayStart + distance * rayDir;
intersection *= 1.0f / CurrentGrid.GridSize;
return(intersectedObjectPos);
}
protected bool GetBlockAddPosition(float gridSize, bool placingSmallGridOnLargeStatic, out MySlimBlock intersectedBlock, out Vector3D intersectedBlockPos, out Vector3D intersectExactPos,
out Vector3I addPositionBlock, out Vector3I addDirectionBlock, out ushort?compoundBlockId)
{
intersectedBlock = null;
intersectedBlockPos = new Vector3D();
intersectExactPos = new Vector3();
addDirectionBlock = new Vector3I();
addPositionBlock = new Vector3I();
compoundBlockId = null;
if (CurrentVoxelBase != null)
{
Vector3 hitInfoNormal = m_hitInfo.Value.HkHitInfo.Normal;
Base6Directions.Direction closestDir = Base6Directions.GetClosestDirection(hitInfoNormal);
Vector3I hitNormal = Base6Directions.GetIntVector(closestDir);
double distance = IntersectionDistance * m_hitInfo.Value.HkHitInfo.HitFraction;
Vector3D rayStart = IntersectionStart;
Vector3D rayDir = Vector3D.Normalize(IntersectionDirection);
Vector3D intersection = rayStart + distance * rayDir;
// Get cube block placement position (add little threshold to hit normal direction to avoid wavy surfaces).
addPositionBlock = MyCubeGrid.StaticGlobalGrid_WorldToUGInt(intersection + 0.1f * Vector3.Half * hitNormal * gridSize, gridSize, CubeBuilderDefinition.BuildingSettings.StaticGridAlignToCenter);
addDirectionBlock = hitNormal;
intersectedBlockPos = addPositionBlock - hitNormal;
// Exact intersection in uniform grid coords.
intersectExactPos = MyCubeGrid.StaticGlobalGrid_WorldToUG(intersection, gridSize, CubeBuilderDefinition.BuildingSettings.StaticGridAlignToCenter);
// Project exact intersection to cube face of intersected block.
intersectExactPos = ((Vector3.One - Vector3.Abs(hitNormal)) * intersectExactPos) + ((intersectedBlockPos + 0.5f * hitNormal) * Vector3.Abs(hitNormal));
return(true);
}
Vector3D?intersectedObjectPos = GetIntersectedBlockData(ref m_invGridWorldMatrix, out intersectExactPos, out intersectedBlock, out compoundBlockId);
if (intersectedObjectPos == null)
{
return(false);
}
intersectedBlockPos = intersectedObjectPos.Value;
Vector3I removePos;
if (!GetCubeAddAndRemovePositions(Vector3I.Round(intersectedBlockPos), placingSmallGridOnLargeStatic, out addPositionBlock, out addDirectionBlock, out removePos))
{
return(false);
}
if (!placingSmallGridOnLargeStatic)
{
if (MyFakes.ENABLE_BLOCK_PLACING_ON_INTERSECTED_POSITION)
{
Vector3I newRemovepos = Vector3I.Round(intersectedBlockPos);
if (newRemovepos != removePos)
{
if (m_hitInfo.HasValue)
{
Vector3 hitInfoNormal = m_hitInfo.Value.HkHitInfo.Normal;
Base6Directions.Direction closestDir = Base6Directions.GetClosestDirection(hitInfoNormal);
Vector3I hitNormal = Base6Directions.GetIntVector(closestDir);
addDirectionBlock = hitNormal;
}
removePos = newRemovepos;
addPositionBlock = removePos + addDirectionBlock;
}
}
else
{
if (CurrentGrid.CubeExists(addPositionBlock))
{
return(false);
}
}
}
if (placingSmallGridOnLargeStatic)
{
removePos = Vector3I.Round(intersectedBlockPos);
}
intersectedBlockPos = removePos;
intersectedBlock = CurrentGrid.GetCubeBlock(removePos);
if (intersectedBlock == null)
{
Debug.Assert(false, "No intersected block");
return(false);
}
return(true);
}
/// <summary>
/// Calculates exact intersection point (in uniform grid coordinates) from stored havok's hit info object obtained during FindClosest grid.
/// Returns position of intersected object in uniform grid coordinates.
/// </summary>
protected Vector3D?GetIntersectedBlockData(ref MatrixD inverseGridWorldMatrix, out Vector3D intersection, out MySlimBlock intersectedBlock, out ushort?compoundBlockId)
{
Debug.Assert(m_hitInfo != null);
Debug.Assert(m_hitInfo.Value.HkHitInfo.Body.GetEntity() == CurrentGrid);
intersection = Vector3D.Zero;
intersectedBlock = null;
compoundBlockId = null;
double distance = double.MaxValue;
Vector3D?intersectedObjectPos = null;
var line = new LineD(IntersectionStart, IntersectionStart + IntersectionDirection * IntersectionDistance);
Vector3I position = Vector3I.Zero;
if (!CurrentGrid.GetLineIntersectionExactGrid(ref line, ref position, ref distance, m_hitInfo.Value))
{
return(null);
}
distance = Math.Sqrt(distance);
intersectedObjectPos = position;
intersectedBlock = CurrentGrid.GetCubeBlock(position);
if (intersectedBlock == null)
{
return(null);
}
// Compound block - get index of internal block for removing
if (intersectedBlock.FatBlock is MyCompoundCubeBlock)
{
MyCompoundCubeBlock compoundBlock = intersectedBlock.FatBlock as MyCompoundCubeBlock;
ListReader <MySlimBlock> slimBlocksInCompound = compoundBlock.GetBlocks();
double distanceSquaredInCompound = double.MaxValue;
ushort?idInCompound = null;
for (int i = 0; i < slimBlocksInCompound.Count; ++i)
{
MySlimBlock cmpSlimBlock = slimBlocksInCompound.ItemAt(i);
MyIntersectionResultLineTriangleEx?intersectionTriResult;
if (cmpSlimBlock.FatBlock.GetIntersectionWithLine(ref line, out intersectionTriResult) && intersectionTriResult != null)
{
Vector3D startToIntersection = intersectionTriResult.Value.IntersectionPointInWorldSpace - IntersectionStart;
double instrDistanceSq = startToIntersection.LengthSquared();
if (instrDistanceSq < distanceSquaredInCompound)
{
distanceSquaredInCompound = instrDistanceSq;
idInCompound = compoundBlock.GetBlockId(cmpSlimBlock);
}
}
}
// If not intersecting with any internal block and there is only one then set the index to it
if (idInCompound == null && compoundBlock.GetBlocksCount() == 1)
{
idInCompound = compoundBlock.GetBlockId(compoundBlock.GetBlocks()[0]);
}
compoundBlockId = idInCompound;
}
Debug.Assert(intersectedObjectPos != null);
Vector3D rayStart = Vector3D.Transform(IntersectionStart, inverseGridWorldMatrix);
Vector3D rayDir = Vector3D.Normalize(Vector3D.TransformNormal(IntersectionDirection, inverseGridWorldMatrix));
intersection = rayStart + distance * rayDir;
intersection *= 1.0f / CurrentGrid.GridSize;
return(intersectedObjectPos);
}