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    Do touch coordinates change when the screen is moved?

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    • iTap DevelopmentI
      iTap Development
      last edited by

      @Murtaza if you touch an object and then move the screen, will the coordinates for the touch behavior be different when the screen moves?

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      • MurtazaM
        Murtaza Admin
        last edited by

        If you're have the "world coordinates" switch on, then it it won't change. If the switch is set to use screen coordinates then it does change.

        iTap DevelopmentI 1 Reply Last reply Reply Quote 0
        • iTap DevelopmentI
          iTap Development @Murtaza
          last edited by

          @Murtaza i tried with world coordinates on with a while touching behavior. I had the while touching behavior set a label to the the touch point (world coordinates on) and then when i touched the object it would move the screen. When i played it i touched the object, and the coordinates where i touched were not what it showed.

          HamedH 1 Reply Last reply Reply Quote 0
          • HamedH
            Hamed Admin @iTap Development
            last edited by

            @iTap-Development I'm not sure what you mean. Can you either share a link to your project or post a screenshot of the behaviours?

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            • iTap DevelopmentI
              iTap Development @Hamed
              last edited by

              @Hamed or @Murtaza what I'm trying to say is I that, if I touch in the middle of the screen that point would be x16 y12 but if I first move the screen to the point x16 y11 then touch the middle of the screen, the point it would out put is x16 y13 I think...is that how it should work?

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              • HamedH
                Hamed Admin
                last edited by

                Sorry, I told @Murtaza the setup backwards. Screen coordinates will be the same, world coordinates will be different. So if you have world coordinates selected then that is how it should be working.

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                • iTap DevelopmentI
                  iTap Development @Hamed
                  last edited by

                  @Hamed how do you put it on screen coordinates? There is only a toggle for world coordinates, or does turning that off make it screen coordinates? Even with world coordinates off I still have the same problem.

                  Jack8680J 1 Reply Last reply Reply Quote 0
                  • Jack8680J
                    Jack8680 @iTap Development
                    last edited by Jack8680

                    @iTap-Development World Coordinates returns the coordinates in the world, relative to 0,0 of the world coordinates. Turning it off returns where you touched, relative to the object you are touching. To get the screen coordinates, subtract the touching world coordinates from the screen position and add the screen offset (by default, 16 to x and 12 to y).

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                    • iTap DevelopmentI
                      iTap Development @Jack8680
                      last edited by

                      @Jack8680 yeah that works....but isn't there a way to use screen coordinates without doing that @Murtaza ?

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                      • iTap DevelopmentI
                        iTap Development @iTap Development
                        last edited by

                        yeah that works....but isn't there a way to use screen coordinates without doing that @Murtaza ?

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                        • HamedH
                          Hamed Admin
                          last edited by

                          Can you make me a quick project to see whats going on? And tell me what you expect to happen and what is happening?

                          Thanks.

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                          • iTap DevelopmentI
                            iTap Development @Hamed
                            last edited by

                            @Hamed I sent you a project in an email!

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                            • HamedH
                              Hamed Admin
                              last edited by

                              I see whats happening. I assumed you were talking about touches using global behaviours. When turning off world coordinates, it outputs the position relative to itself.

                              eg. you have a blue box in the middle of the screen and you output the y coordinates of the finger with world coordinates off. As soon as your finger goes under neath the blue box, it will be less than zero. If your finger goes above the blue box, it will output the the height of the blue box + the distance away from the edge of the blue box.

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                              • iTap DevelopmentI
                                iTap Development @Hamed
                                last edited by

                                @Hamed so can I output the coordinates relative to the screen? Sorry if I'm confused🙈

                                Jack8680J 1 Reply Last reply Reply Quote 0
                                • Jack8680J
                                  Jack8680 @iTap Development
                                  last edited by

                                  @iTap-Development not directly, but as I said before you can find the coordinates relative to 0,0 of the screen by doing this (for default zoom):
                                  X=Touching.X(World Coords)-Screen.X+16
                                  Y=Touching.Y(World Coords)-Screen.Y+12
                                  When you change the zoom, this won't work anymore since the screen centre would change. To fix this, change the 16 and 12 offsets to the centre of the screen when you zoom.

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