I’m starting a learning project. The idea is that you have an archer character that is static, that has a bow attached to it that shoots arrows to targets of varying difficulty.
Turns out that right at the start I’m stuck. How do I make it so that the bow rotates when the player clicks and holds the mouse anywhere on the screen? So I click+hold and move left/right and the bow rotates left/right to aim the shot. I’d like to also eventually make it portable to phones (so you’d tap+hold etc).
Stack Overflow isnt a code writing service but i will explain what you must do:
Method 1 (Exact Aiming):
For every frame the mouse is down:
Make a Ray from a screen point... hint (use
camera.ScreenPointToRay).
Get a far point along the Ray using ray.GetPoint(distance);.
Bow.Transform.LookAt(newPoint, Vector3.Up);.
Method 2 (Continuous Movement):
Make a variable oldMousePos to store a Vector2 location.
Record your initial screen click position into that variable on a
mouse down event.
Have a function that runs once every frame the mouse stays down.
For the direction of the rotation of the bow, you can use
(newMousePos - oldMousePos).normalized;.
For the speed of rotation for your bow, you can use (newMousePos -
oldMousePos).sqrMagnitude;.
Related
Still new to Unity. I am trying to make a 3D runner game. So I have a ground that is spawning as my player moves up the map. It spawns forward. However, I would like to make my ground spawn to the right and left side of my character so that my character never falls off the map. Just an endless ground spawn. How do I go about this?
I tried doing transform but the ground would spawn in a y axis instead of building along with the original gound.
Judging from what you wrote, it seems that you are holding the wrong axis when grabbing the currently created position.
I don't know what type of runner game it is.
There is a difference in the methods you can try when the character is fixed in place and when it is freely moving on the screen.
Fixed
The character only jumps in place, and the map is continuously created left and right, and you can make it by thinking that the map moves.
If the character passes through a specific point (eg the center of the map), you can create a map in the direction it crossed.
Moving
The second method suggested when it is fixed is a general example. If you want to design a map that can move up, down, left, and right, you need to think a little more. If you create a map on the top, bottom, left, and right in a repeating form, you can try a method similar to that created on the left and right.
You can find many examples by searching for keywords such as Endless Runner on YouTube or Google.
I am working on moving a Cube across the screen when I press an arrow and display two different animations depending on if it is moving or idle. I used a very basic translation to do this when I press the right arrow. I have two different animation states that work fine independently. One spins the cube when it is “idle” and the other makes to bounce up down in the “right” state. Both are 1 second animations. The idle animation spins the cube 360 degrees, and the right animation will move the cube up 1 unit then back down to its original position. Everything works well by itself. I included an image for the states for the animation.
Cube Animation States
In order to get the movement working with the animations I made an empty GameObject and made the cube a child if it. When the cube is idle it spins, and when I press right it moves and bounces up and down. The problem is when I release the right arrow the cube snaps back to its original position from the start of the last bounce animation. If I hold right for 10 seconds, and release it will only snap back to the beginning of the most recent iteration of the bouncing animation (not to when I started pressing right).
Does anyone know why this would happen? I tried changing some of the settings for the transitions, but it doesn’t seem like that is the problem.
Can you check that your idle animation modifying its position in any case.
First, you can't move the game object with animation.
you can have the rotate animation in the cube but not the translating part.
Because when the animations switch between the states the object will be moved to its original position.
solution:
-Create a script and attach the script to that game object.
-use translate functions to move the object
I was creating a basic scenario in Unity. Thi scene have 1 cube in the center of the room, and 1 camera(player).
I need to move the player around the cube like if was flying ( with movements at the top, bottom, left, right, inside and outside), very similar to when we move freely with the mouse on the development screen.
I need make this movement with the touch.
How can i to do?
Thanks!!
You can achieve almost all movements you want using a standard fps mobile controller: 1 joystick and a slide area for rotation. Your forward movement will be your player's forward direction(with W in unity you move always forward) and of course transform's left/right for strafe.
The tricky part is move up/down part(even in Unity editor you have to use 2 extra keys, Q&E) but you can always move up/down just looking in that direction.
if u use the unity standard asset 'cross platform input' (which is available in the standard asset pack for free,) then anything you program with a mouse event or click, will automatically call the corresponding touch event if use on a phone.
I have a 3D model in my Unity project and I have a JavaScript that rotates the camera based on keyboard arrow keys (left/right).
Now, I need to have a script that detects a horizontal swipe hand gesture and returns a vector that I would use to rotate the camera.
I am using the ZigFu SDK with PrimeSense OpenNI/NITE. The ZigFu SDK comes with sample scripts, one of which is SwipeDetector - I am wondering how does it work?
My setup:
I have 3 GameObjects: a 3D model, a MainCamera, and a Directional Light.
So, how do I use the SwipeDetector script in my project? The way I do it right now is 1)Create an empty game object "SwipeDetection", 2) "drag and drop" the SwipeDetector script from ZigFu. I've put in logs in the SwipeDetector script, but I don't see them.
The Zigfu bindings (I'm assuming you're using version 1.4?) dont have a SwipeDetector sample, but they do include a SwipeDetector MonoBehaviour. The SwipeDetector detects vertical and horizontal swipes, but unfortunately doesn't detect the velocity of the swipe.
You have a few options:
Use the provided Swipe Detector, and rotate the camera by a fixed amount every time you detect a horizontal swipe (SwipeDetector_Left or SwipeDetector_Right events)
Use the provided Swipe Detector, start rotating on Swipe, and stop rotating on the SwipeDetector_Release event. This would be similar to pressing on the arrow keys (assuming you have the same behaviour on keydown/keyup events)
Keep track of the hand velocity, and check its value when the swipe occurs. Use this value to rotate the camera. You can keep track of velocity by creating a new MonoBehaviour, and implementing Hand_Create, Hand_Update, and Hand_Destroy (look at any of the scripts in the HandpointControls folder). Keep a queue with the hand points from the last n frames. The delta between the newest & oldest points will be your velocity for those n frames (I recommend you start with 15 frames, or about half a second)
(This will be included in a future Zigfu release :))
Your game object setup sounds right - if you dont see any logs you may not be performing the 'focus gesture' correctly. Try waving or performing a tap towards the sensor - this should cause the Hand_Create event to be called. Once you have a valid handpoint you should get the proper events from the Swipe Detector.
Also worth mentioning your swipe detection game object should have a HandPointControl component (added implicitly with RequireComponent) and that 'ActiveOnStart' should be true.
I have a simple project built with Cocos2D and Chipmunk. So far it's just a Ball (body, shape & sprite) bouncing on the Ground (a static line segment at the bottom of the screen).
I implemented the ccTouchesBegan/Moved/Ended methods to drag the ball around.
I've tried both:
cpBodySlew(ballBody, touchPoint, 1.0/60.0f);
and
ballBody->p = cgPointMake(touchPoint.x,touchPoint.y);
and while the Ball does follow my dragging, it's still being affected by gravity and it tries to go down (which causes velocity problems and others).
Does anyone know of the preferred way to Drag an active Body while the physics simulation is going on?
Do I need somehow to stop the simulation and turn it back on afterwards?
Thanks!
Temporarily remove the body from the space.
If you want the object to have inertia when you release it, that's a different story. The cleanest way is to attach a fairly stiff spring between the ball and a temporary sensor body that moves under the control of your finger. When you let go with your finger, the ball will retain whatever kinematics it had while you were dragging it. Be sure not to remove the ball from the space in this case.
You aren't updating the velocity of the object when you aren't using cpBodySlew(). That is why it falls straight down.
A better way to do it is to use a force clamped pivot joint like the official demos do to implement mouse control. http://code.google.com/p/chipmunk-physics/source/browse/trunk/Demo/ChipmunkDemo.c#296