c# - Why would supposedly different two event methods be called by the same object? (Mouse Click-Drag-Unclick) -

version: unity3d 4.6.2f1

i have grid of tiles (cube gameobjects tile script attached). positioned @ index location [x][y] = (x, y, z=0) world coordinates.

i trying achieve behavior similar minesweepers: when left click released, unless there right click down, tile upon mouse released revealed. below, try coordinates of tile upon mouse left click released.

before code:

• onmousedown() - onmousedown called when user has pressed mouse button while on guielement or collider.
• onmouseup() - onmouseup called when user has released mouse button.

based on these definitions, i assumed (mistake?) onmouseup() called object above it, mouse left click released.

on tile script, have following :

public class tile : monobehaviour {     // variables     private vector2 _gridposition = vector2.zero;      public vector2 gridposition     {         { return _gridposition; }         set { _gridposition = value; }     }      // functions     string vec2totext(vector2 v)     {         return string.format("(" + v.x + ", " + v.y + ")");     }      void onmousedown()     {         debug.log("tile:: on_mouse_down:: " + vec2totext(_gridposition));     }      void onmouseup()     {         debug.log("tile:: on_mouse_up:: " + vec2totext(_gridposition));     }      void onmouseenter()     {         debug.log("tile:: mouse_enter: " + vec2totext(_gridposition));     }      void onmouseexit()     {         debug.log("tile:: mouse_exit: " + vec2totext(_gridposition));     } } 

and here output:

tile:: mouse_enter: (15, 15) tile:: mouse_down: (15, 15) tile:: mouse_exit: (15, 15) tile:: mouse_enter: (14, 15) tile:: mouse_up: (15, 15)    %% line tile:: mouse_exit: (14, 15) 

if (14,15) on onmouseup() function, i'd directly find tile reveal apparently can't. workaround goal thought keep static bool _isdragging , use in onmouseenter() in if block assign tile revealed correctly. -- calling 2 functions same object though pressed left click object , released on other object? -- intended? there better workaround situation?

onmousedown emitted left mouse button. have implement right click yourself.

one option check raycast press buttons.

void update() {     if (input.getmousebuttondown(1))     {         var ray = camera.screenpointtoray(input.mouseposition);         raycasthit hitinfo;         if (physics.raycast(ray, out hitinfo))         {             var myobject = hitinfo.collider.getcomponent<myscriptorsomething>();             // here         }     } } 

one other option using onmouseenter check right click. like:

void onmouseover() {     if (input.getmousebuttondown(1))     {         // here     } } 

edit:

the reason onmouseup called tile clicked simple. behaviour safest , more expected way of time. think of mouse events of gameobject "user clicked on me" , "user released button after clicked on me".

so let's onmouseup called object under cursor @ time of mouse button release. think of operation starts on mouse click , going finalized when mouse button released (like drag , drop). painfully figure out onmouseup not called if mouse no longer points clicked object. won't able finalize operation. have catch mouse release event yourself.

in case, onmouseup , onmousedown alone won't cover needs. trying specific application. unfortunately unity's input system not cover kind of interaction default. luckily unity flexible enough implement easily.