private void CreateVirtualButtons(ImageTargetBehaviour itb)
{
// Allocate array for all Image Targets.
int numVirtualButtons = imageTargetGetNumVirtualButtons(mDataSetPtr, itb.TrackableName);
IntPtr virtualButtonDataPtr =
Marshal.AllocHGlobal(Marshal.SizeOf(typeof(QCARManager.VirtualButtonData)) * numVirtualButtons);
IntPtr rectangleDataPtr =
Marshal.AllocHGlobal(Marshal.SizeOf(typeof(VirtualButtonBehaviour.RectangleData)) * numVirtualButtons);
// Copy Virtual Button data from native.
imageTargetGetVirtualButtons(virtualButtonDataPtr,
rectangleDataPtr,
numVirtualButtons,
mDataSetPtr,
itb.TrackableName);
for (int i = 0; i < numVirtualButtons; ++i)
{
IntPtr vbPtr = new IntPtr(virtualButtonDataPtr.ToInt32() + i *
Marshal.SizeOf(typeof(QCARManager.VirtualButtonData)));
QCARManager.VirtualButtonData vbData = (QCARManager.VirtualButtonData)
Marshal.PtrToStructure(vbPtr, typeof(QCARManager.VirtualButtonData));
// Do not overwrite existing Virtual Buttons.
if (mVBBehaviourDict.ContainsKey(vbData.id))
{
continue;
}
IntPtr rectPtr = new IntPtr(rectangleDataPtr.ToInt32() + i *
Marshal.SizeOf(typeof(VirtualButtonBehaviour.RectangleData)));
VirtualButtonBehaviour.RectangleData rectData = (VirtualButtonBehaviour.RectangleData)
Marshal.PtrToStructure(rectPtr, typeof(VirtualButtonBehaviour.RectangleData));
// QCAR support names up to 64 characters in length, but here we allocate
// a slightly larger buffer:
int nameLength = 128;
System.Text.StringBuilder vbName = new System.Text.StringBuilder(nameLength);
if (imageTargetGetVirtualButtonName(mDataSetPtr, itb.TrackableName,
i, vbName, nameLength) == 0)
{
Debug.LogError("Failed to get virtual button name.");
continue;
}
VirtualButtonBehaviour vbb = CreateVirtualButton(
vbData.id, vbName.ToString(),
new Vector2(rectData.leftTopX, rectData.leftTopY),
new Vector2(rectData.rightBottomX, rectData.rightBottomY),
itb);
mVBBehaviourDict.Add(vbData.id, vbb);
}
Marshal.FreeHGlobal(virtualButtonDataPtr);
Marshal.FreeHGlobal(rectangleDataPtr);
}
// Registers a Virtual Button at native code. This method is called
// implicitly by the ImageTargetBehaviour.CreateVirtualButton method. This
// method should not be called by user code.
public bool RegisterVirtualButton(VirtualButtonBehaviour vb,
string imageTargetName)
{
VirtualButtonBehaviour.RectangleData rectData =
new VirtualButtonBehaviour.RectangleData();
Vector2 leftTop, rightBottom;
vb.CalculateButtonArea(out leftTop, out rightBottom);
rectData.leftTopX = leftTop.x;
rectData.leftTopY = leftTop.y;
rectData.rightBottomX = rightBottom.x;
rectData.rightBottomY = rightBottom.y;
IntPtr rectPtr = Marshal.AllocHGlobal(
Marshal.SizeOf(typeof(VirtualButtonBehaviour.RectangleData)));
Marshal.StructureToPtr(rectData, rectPtr, false);
bool registerWorked =
(imageTargetCreateVirtualButton(DataSetPtr, imageTargetName,
vb.VirtualButtonName, rectPtr) != 0);
if (registerWorked)
{
int id = virtualButtonGetId(DataSetPtr, imageTargetName,
vb.VirtualButtonName);
// Initialize the id of the button:
vb.InitializeID(id);
// Check we don't have an entry for this id:
if (!mVBBehaviourDict.ContainsKey(id))
{
// Add:
mVBBehaviourDict.Add(id, vb);
}
}
return(registerWorked);
}
// Registers a Virtual Button at native code. This method is called
// implicitly by the ImageTargetBehaviour.CreateVirtualButton method. This
// method should not be called by user code.
public bool RegisterVirtualButton(VirtualButtonBehaviour vb,
string imageTargetName)
{
VirtualButtonBehaviour.RectangleData rectData =
new VirtualButtonBehaviour.RectangleData();
Vector2 leftTop, rightBottom;
vb.CalculateButtonArea(out leftTop, out rightBottom);
rectData.leftTopX = leftTop.x;
rectData.leftTopY = leftTop.y;
rectData.rightBottomX = rightBottom.x;
rectData.rightBottomY = rightBottom.y;
IntPtr rectPtr = Marshal.AllocHGlobal(
Marshal.SizeOf(typeof(VirtualButtonBehaviour.RectangleData)));
Marshal.StructureToPtr(rectData, rectPtr, false);
bool registerWorked =
(imageTargetCreateVirtualButton(DataSetPtr, imageTargetName,
vb.VirtualButtonName, rectPtr) != 0);
if (registerWorked)
{
int id = virtualButtonGetId(DataSetPtr, imageTargetName,
vb.VirtualButtonName);
// Initialize the id of the button:
vb.InitializeID(id);
// Check we don't have an entry for this id:
if (!mVBBehaviourDict.ContainsKey(id))
{
// Add:
mVBBehaviourDict.Add(id, vb);
}
}
return registerWorked;
}
