A simple term for "translation", the change of position of an entity typically on the route of going from point A to point B.
38
votes
5answers
1k views
Looking for a good technique for character movement in hack&slash game
I'm making hack&slash game and I want my characters move like for example in Torchlight, Diablo, etc.
Currently I generate set of nodes for all walkable areas of a floor. When I click somewhere ...
22
votes
6answers
2k views
Who does the AI calculations in an MMO?
I am building an MMO and want to add NPCs. The thing is I don't know the basic design. What does the calculations, the clients or the server? I would understand the server calculating events and ...
17
votes
4answers
3k views
Top Down RPG Movement w/ Correction?
I would hope that we have all played Zelda: A Link to the Past, please correct me if I'm wrong, but I want to emulate that kind of 2D, top-down character movement with a touch of correction. It has ...
16
votes
2answers
563 views
Eight or infinity sign trajectory
When I want to move object around point I do:
point.x *= cosf(timer.timeElapsed);
point.y *= sinf(timer.timeElapsed);
How to make point move on eight or infinity sign trajectory?
15
votes
6answers
1k views
AI control for a ship with physics model
I am looking for ideas how to implement following in 2D space. Unfortunately I don't know much about AI/path finding/autonomous control yet.
Let's say this ship can move freely but it has mass and ...
14
votes
2answers
1k views
RTS Game Protocol
I've been thinking about a multi player RTS game. The part that I can't seem to get around is keeping unit movement synced. If I move unit A to spot XY, I have to communicate that back to server that ...
13
votes
6answers
1k views
How to build a “traffic AI”?
A project I am working on right now features a lot of "traffic" in the sense of cars moving along roads, aircraft moving aroun an apron etc.
As of now the available paths are precalculated, so nodes ...
13
votes
2answers
569 views
AI to move custom-shaped spaceships (shape affecting movement behaviour)
I'm designing a networked turn based 3D-6DOF space fleet combat strategy game which relies heavily on ship customization. Let me explain the game a bit, since you need to know a bit about it to set ...
12
votes
3answers
384 views
Technique for objects following each other in complete movement?
I'm wondering how objects follow each other where they move over the previous position of the object in front of them. When the leading object stops, all that are following should stop at their ...
11
votes
4answers
3k views
Curved movement between two points
What is a good technique to enable an object to move between to points in a nice curved motion?
The end position could also be in motion, such as the trajectory of a homing missile.
11
votes
1answer
364 views
Pathfinding on a uneven planetary surface
My question is what would be the best approach to pathfinding on an uneven planetary surface?
Background Information
I have created a planet from displacement mapping 6 sphere projected planes. ...
10
votes
4answers
693 views
Player moving up, is he jumping or climbing?
In a 2D physics-based platformer game that has ladders in it, how do you determine whether the player moving up is caused by a jump or him climbing a ladder, such that you know what animation to play? ...
10
votes
4answers
404 views
Where will my character stop?
Many years ago I coded some AI for a budget pseudo-3d game. There was one calculation which I never really figured out the best way to do, and that was calculating where the enemy would end up if it ...
9
votes
2answers
320 views
How to limit click'n'drag movement to an area?
I apologize for the somewhat generic title. I'm really don't have much clue about how to accomplish what I'm trying to do, which is making it harder even to research a possible solution.
I'm trying ...
8
votes
2answers
3k views
Enemy movement in straight line to player in chase game
I'm creating a game where the enemies spawn randomly on a map then move towards the player every frame at a random speed. The map has no obstacles so the enemies should always move in a straight line. ...
8
votes
2answers
240 views
Following a path in a smooth fashion
I am currently making a 2d tower defense game with a static, predetermined lane that the enemies follow (i.e. towers cannot block the path and path finding is not the problem I am trying to solve).
I ...
8
votes
2answers
2k views
Free movement in a tile-based isometric game
Is there a reasonable easy way to implement free movement in a tile-based isometric game? Meaning that the player wouldn't just instantly jump from one tile to another or not be "snapped" to the grid ...
8
votes
2answers
2k views
How do I tackle top down RPG movement?
I have a game that I am writing in Java. It is a top down RPG and I am trying to handle movement in the world. The world is largely procedural and I am having a difficult time tackling how to handle ...
8
votes
1answer
295 views
Is there anything equivalent to Portal 2's linked_portal_door in any other engines?
I need the functionality of the linked_portal_door that's in Portal 2. I've searched a little in UDK and mostly got people trying to duplicate the portal gun. Does anyone know if UDK, CryEngine, ...
7
votes
2answers
237 views
How to handle entity path-finding and movement in a large networked world?
Considering the image above with tiles split into 32x32 boxes, I have an entity which is marked to 'aggro' nearby players that come close to it. I'd like this monster to ideally chase the player (and ...
7
votes
2answers
153 views
Interpolating between two networked states?
I have many entities on the client side that are simulated (their velocities are added to their positions on a per frame basis) and I let them dead reckon themselves. They send updates about where ...
7
votes
5answers
712 views
returning correct multiTouch id
I've spent countless hours on reading tutorials and looking at every question related to multiTouch from here and Stackoverflow. But I just cannot figure out how to do this correctly. I use a loop to ...
7
votes
4answers
617 views
Moving objects colliding when using unalligned collision avoidance (steering)
I'm having trouble with unaligned collision avoidance for what I think is a rare case. I have set two objects to move towards each other but with a slight offset, so one of the objects is moving ...
7
votes
2answers
190 views
Movement on a curved planet surface
I'm looking for a solution for moving a variety of objects over the uneven surface of my planet. The idea is that I will have a number of objects that follow the planetary landscape moving about in ...
6
votes
4answers
833 views
Equation for bouncing graph?
I basically want my camera in 3D move automatically. Currently, I have linear movement which is rather dumb, so I'd like to do a bouncing movement.
However, what is a good equation for bouncing? I ...
6
votes
2answers
251 views
Simulate movement towards the screen in a 2D world
I need to create the illusion of someone kicking a ball to the screen. For that, I have a initial position of the ball (about the middle of the screen), and I put the sprite of the ball scaled at 0.2 ...
6
votes
2answers
11k views
Moving a sprite in XNA/C#, using vectors
I'm currently looking into XNA game development with the C# language.
I have two classes: the main game handler and a "sprite" class. Following is some basic pseudo-code which I hope adequately ...
6
votes
2answers
543 views
How could you create climbing movement in a 2D platformer?
Basically what I want to do is have a playable character that is able to "walk" on an organic surface at any angle, including sideways and upside-down. By "organic" I mean I want my levels to have ...
6
votes
2answers
1k views
I want to implement free-running movement (like Assassin's Creed) in 2D. What to do?
I would like to implement free-running as popularized by Assassin's Creed, albeit in 2D.
What are some specific techniques or algorithms that I can use to achieve free-running in 2D without having to ...
6
votes
4answers
349 views
Implementing AI to hide behind obstacles
I am developing an AI simulation of predator and prey. I would like to simulate the AI hiding behind obstacles, if it is being chased. But I am still trying to figure out the best way to implement ...
6
votes
2answers
1k views
How to manage enemy movement and shoot in a shmup?
I'm wondering what is the best (or at least a good) way of managing enemies in a shoot-em-up.
Basically, what I'd do would be a class that manages displaying and updating positions of all the ...
5
votes
5answers
427 views
How do I implement deceleration for the player character?
Using delta time with addition and subtraction is easy.
player.speed += 100 * dt
However, multiplication and division complicate things a bit. For example, let's say I want the player to double his ...
5
votes
1answer
381 views
What is the best way to limit player movement?
I'm currently programming a 2d game where the player moves around on a rectangular playing field. The player has a direction and a velocity. What is the best way to limit the player's movement so ...
5
votes
2answers
226 views
How do I keep my character centred on screen?
I am making a game similar to Legend of Zelda: Link to the Past (top-down 2D action-adventure). I want the character to stay centred on the screen when he moves.
Currently, whenever the player wants ...
5
votes
3answers
490 views
How can I make a character move forward in a certain direction?
I have an entity class which is updated every game tick. Let's just assume said entity moves forward constantly. What i want to know is, how can i make it so that i can give an angle to a function and ...
5
votes
1answer
163 views
Swaying Camera when Walking
You can see the effect in many games. The camera sways or wiggles a bit while walking to make the movement feel more realistic.
I have implemented a camera in my game. (Who'd have thunk it?) So is ...
5
votes
1answer
505 views
How can I implement view wobble when my player is running?
I'm creating a FPS in XNA. So far its' going great. What I'm looking at doing is replicating the camera movements that you see in Modern Warfare. So, if you are walking the camera stays pretty ...
5
votes
2answers
2k views
Oscillating Sprite Movement in XNA
I'm working on a 2d game and am looking to make a sprite move horizontally across the screen in XNA while oscillating vertically (basically I want the movement to look like a sin wave). Currently for ...
5
votes
3answers
439 views
Random monsters move in-sync instead of individually
I am making a game in which monsters spawn randomly and begin to move around randomly. I am fairly new at programming but not at game development. Through using a few tutorials I was able to make 1 ...
5
votes
2answers
132 views
How can I normalize a vector if I am handling movment of each axis seperatley?
I am writing a 2D tile based game engine in XNA, and I've recently fine-tuned my collision detection using the answers provided here and more specifically here.
The tile based collision detection now ...
5
votes
1answer
486 views
How to implement curved movement while tracking the appropriate angle?
I'm currently coding a 2D top-down car game which will be turn-based. And since it's turn-based, the cars won't be controlled directly (i.e. with a simple velocity vector that adjusts its angle when ...
5
votes
2answers
203 views
How to combine tap and long hold gesture recognizers?
I have a game in which the player moves around a sprite by tapping on various sections of the screen (left, right, up, down). So far, each tap moves the sprite one tile (I use a tile system for ...
5
votes
2answers
2k views
How do I make my character slide down high-angled slopes?
I am currently working on my character's movement in Unity3D. I managed to make him move relatively to the mouse cursor.
I set a slope limit of 45°, which does not allow the character to walk up the ...
4
votes
2answers
854 views
Is it safe to set FPS rate to a constant?
I learned from game class that in update function, every movements must be time dependent for the sake of linearity in movement.
We made a simple game. Every move like going left, right or jump is ...
4
votes
3answers
1k views
Moving from A(x,y) to B(x1,y1) with constant speed?
I currently have something like:
float deltaX = point0.getX() - point1.getX();
float deltaY = point0.getY() - point1.getY();
And every 0.01 seconds I refresh my objects position like this:
...
4
votes
4answers
384 views
Can a high FPS negatively affect how a program runs?
Yeah I know this is a broad question and will get down rated, I'm just hoping for some answer before it gets closed.
Anyway, I'm using Slick 2D/Java to play around with graphics. I'm having some ...
4
votes
2answers
1k views
Move sprite in the direction it is facing?
I'm using Java/Slick 2D. I'm trying to use the mouse to rotate the sprite and the arrow keys to move the sprite. I can get the sprite to rotate no problem, but I cannot get it to move in the direction ...
4
votes
3answers
331 views
Smooth Sprite Movement - Don't Add Velocity to Position?
I am trying to figure out if there is a way to move a sprite smoothly on the screen at different speeds without stuttering, but keeping the effect that it's moving smoothly; especially at faster ...
4
votes
1answer
521 views
C# Top down movement limitation
I'm using C# and Visual Studios 2010 with XNA 4.0+lua, and my teacher has asked us to make a 2D RPG game similar to zelda(top down). I was aiming to use just one image for each map region, instead of ...
4
votes
2answers
356 views
Enemy mathematical behavior
I'm really trying to up my game in game mathematics and now I'm working on enemy movement and a bit of AI. I have an enemy with two modes attack and avoid, based on an integer avoid variable that's ...
