HW’s fault<\/a>.\u00a0 Curious to see the results from a Tab or other new devices though)<\/li>\n<\/ul>\nFor those interested, here is the relevant tracking code to get the “finger id”:\u00a0 (yeah, I could have done it a more Obj-C way, but meh.. also, you may need your file named .mm, not .m for this code to work…)<\/p>\n
[php]<\/p>\n
const int MAX_TOUCHES= 11; \/\/Oops, it can handle 11, not 10. Thanks @Bob_at_BH<\/p>\n
class TouchTrack
\n{
\npublic:<\/p>\n
\tTouchTrack()
\n\t{
\n\t\tm_touchPointer = NULL;
\n\t}<\/p>\n
\tvoid *m_touchPointer;
\n};<\/p>\n
TouchTrack g_touchTracker[MAX_TOUCHES];<\/p>\n
int GetFingerTrackIDByTouch(void* touch)
\n{
\n\t\tfor (int i=0; i < MAX_TOUCHES; i++)
\n\t\t{
\n\t\t\tif (g_touchTracker[i].m_touchPointer == touch)
\n\t\t\t{
\n\t\t\t\treturn i;
\n\t\t\t}
\n\t\t}<\/p>\n
\t\/\/LogMsg("Can’t locate fingerID by touch %d", touch);
\n\treturn -1;
\n}<\/p>\n
int AddNewTouch(void* touch)
\n{
\n\t\tfor (int i=0; i < MAX_TOUCHES; i++)
\n\t\t{
\n\t\t\tif (!g_touchTracker[i].m_touchPointer)
\n\t\t\t{
\n\t\t\t\t\/\/hey, an empty slot, yay
\n\t\t\t\tg_touchTracker[i].m_touchPointer = touch;
\n\t\t\t\treturn i;
\n\t\t\t}
\n\t\t}<\/p>\n
\tLogMsg("Can’t add new fingerID");
\n\treturn -1;
\n}<\/p>\n
int GetTouchesActive()
\n{
\nint count = 0;<\/p>\n
\tfor (int i=0; i < MAX_TOUCHES; i++)
\n\t\t{
\n\t\t\tif (g_touchTracker[i].m_touchPointer)
\n\t\t\t{
\n\t\t\t\tcount++;
\n\t\t\t}
\n\t\t}
\nreturn count;
\n}<\/p>\n
\/\/ Handles the start of a touch
\n– (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
\n{
\n \t\/\/ Enumerate through all the touch objects.<\/p>\n
\tfor (UITouch *touch in touches)
\n\t{
\n\t\t\/\/found a touch. Is it already on our list?
\n\t\tint fingerID = GetFingerTrackIDByTouch(touch);<\/p>\n
\t\tif (fingerID == -1)
\n\t\t{
\n\t\t\t\/\/add it to our list
\n\t\t\tfingerID = AddNewTouch(touch);
\n\t\t} else
\n\t\t{
\n\t\t\t\/\/already on the list. Don’t send this
\n\t\t\t\/\/LogMsg("Ignoring touch %d", fingerID);
\n\t\t\tcontinue;
\n\t\t}<\/p>\n
\t\tCGPoint pt =[touch locationInView:self];
\n\t\tConvertCoordinatesIfRequired(pt.x, pt.y);
\n\t\tGetMessageManager()->SendGUIEx(MESSAGE_TYPE_GUI_CLICK_START,pt.x, pt.y,fingerID);
\n\t}\t<\/p>\n
\t#ifdef _DEBUG
\n\t\/\/LogMsg("%d touches active", GetTouchesActive());
\n\t#endif
\n}<\/p>\n
– (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
\n{
\n \t\/\/ Enumerate through all the touch objects.
\n\tfor (UITouch *touch in touches)
\n\t{
\n\t\t\/\/found a touch. Is it already on our list?
\n\t\tint fingerID = GetFingerTrackIDByTouch(touch);
\n\t\tif (fingerID != -1)
\n\t\t{
\n\t\t\tg_touchTracker[fingerID].m_touchPointer = NULL; \/\/clear it
\n\t\t} else
\n\t\t{
\n\t\t\t\/\/wasn’t on our list
\n\t\t\tcontinue;
\n\t\t}<\/p>\n
\t\tCGPoint pt =[touch locationInView:self];
\n\t\tConvertCoordinatesIfRequired(pt.x, pt.y);
\n\t\tGetMessageManager()->SendGUIEx(MESSAGE_TYPE_GUI_CLICK_END,pt.x, pt.y, fingerID);
\n\t}
\n}<\/p>\n
– (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
\n{
\n \t\/\/ Enumerate through all the touch objects.
\n\tfor (UITouch *touch in touches)
\n\t{
\n\t\t\/\/found a touch. Is it already on our list?
\n\t\tint fingerID = GetFingerTrackIDByTouch(touch);
\n\t\tif (fingerID != -1)
\n\t\t{
\n\t\t\tg_touchTracker[fingerID].m_touchPointer = NULL; \/\/clear it
\n\t\t} else
\n\t\t{
\n\t\t\t\/\/wasn’t on our list
\n\t\t\tcontinue;
\n\t\t}<\/p>\n
\t\tCGPoint pt =[touch locationInView:self];
\n\t\tConvertCoordinatesIfRequired(pt.x, pt.y);
\n\t\tGetMessageManager()->SendGUIEx(MESSAGE_TYPE_GUI_CLICK_END,pt.x, pt.y, fingerID);
\n\t}
\n}<\/p>\n
– (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
\n{
\n \/\/ Enumerate through all the touch objects.
\n\tfor (UITouch *touch in touches)
\n\t{<\/p>\n
\t\t\/\/found a touch. Is it already on our list?
\n\t\tint fingerID = GetFingerTrackIDByTouch(touch);
\n\t\tif (fingerID != -1)
\n\t\t{
\n\t\t\t\/\/found it
\n\t\t} else
\n\t\t{
\n\t\t\t\/\/wasn’t on our list?!
\n\t\t\tcontinue;
\n\t\t}<\/p>\n
\t\tCGPoint pt =[touch locationInView:self];
\n\t\tConvertCoordinatesIfRequired(pt.x, pt.y);
\n\t\tGetMessageManager()->SendGUIEx(MESSAGE_TYPE_GUI_CLICK_MOVE,pt.x, pt.y, fingerID);
\n\t}
\n}<\/p>\n
[\/php]<\/p>\n","protected":false},"excerpt":{"rendered":"
So I’ve got this game prototype idea I wanted to try but I needed better multi-touch input support (accurate and comprehensive fingerID tracking) to make it happen. It works great and has been added to the Proton SDK svn along with a new “Multitouch input test” option in RTSimpleApp. Some stuff I noticed: Tracks 11 […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,16,6],"tags":[],"class_list":["post-1030","post","type-post","status-publish","format-standard","hentry","category-development","category-proton","category-tech-tips"],"_links":{"self":[{"href":"https:\/\/www.codedojo.com\/index.php?rest_route=\/wp\/v2\/posts\/1030","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.codedojo.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.codedojo.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.codedojo.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.codedojo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1030"}],"version-history":[{"count":20,"href":"https:\/\/www.codedojo.com\/index.php?rest_route=\/wp\/v2\/posts\/1030\/revisions"}],"predecessor-version":[{"id":1533,"href":"https:\/\/www.codedojo.com\/index.php?rest_route=\/wp\/v2\/posts\/1030\/revisions\/1533"}],"wp:attachment":[{"href":"https:\/\/www.codedojo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1030"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.codedojo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1030"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.codedojo.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1030"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
![\"\"](\"http:\/\/www.codedojo.com\/wp-content\/uploads\/2011\/01\/multitouch.jpg\" "\\"multitouch\\"")
<\/a>