Relating to the motion of objects through space and time. Including concepts such as acceleration (thrust and gravity), mass, collision response, friction and more.

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Platforming - Hanging off of cliffs and edges? [duplicate]

Possible Duplicate: Programming a climbing system like tomb raider I've been interested in platforming gameplay dynamics for a while now. What I'm trying to ask is how games like Assassin's ...
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1answer
428 views

Bullet impact or force on cube in Blender

Hoping someone here may be able to help. I'm new to Blender (and game development/3d modelling) and have been following some tutorials online to get me started. I am building a very basic FPS just to ...
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514 views

android basic Movement for array-objects

I was adviced to start a seperate question for this so here I go. Been stuck so long with this do if you can help, please do. Lets get to it! Im trying to set the speed for my bullets, but since Im ...
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127 views

How to properly simulate object aproximation towards camera in 2D?

I'm trying to make some objects come towards the camera but it just doesn't feel right... you can check the progress here: http://testing.fyrastudio.com/lab/tweetOlympics/v0.005/ You run by ...
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189 views

Will my game engine be compatible with physics engines?

My engine supports Scene handling, Cameras, and has a Renderer. Also, it has a class called Drawable, which has the position, the shape and the picture of an object. The picture property has width, ...
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432 views

Calculating instantaneous speed and acceleration for a simple car software model

I am trying to model a speedometer and tachometer for a simple software model of a car dashboard. I want this to be relatively simple, so for my purposes I won't likely simulate variables such as drag ...
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GameObject and Components

I am creating a relatively simple game engine in C++ and Qt. I am using Irrlicht for graphics, and as of now, I will not be using any physics or audio libraries. For time's sake, I am using ...
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234 views

Unsure how to move a unit to a point

I've got a unit and a series of points in 3D space which approximate the path it's been given. However, I'm not sure where to go from there. The unit has certain physical constraints, like, it can ...
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231 views

I am looking to make a spaceship tilt as it corners but I cant get it to return

I am using the TL game engine I am not allowed to use a physics engine but I need to make the spaceship lean as it corners, I can make it lean but cannot make it return to its starting position. I ...
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286 views

Calculating an orbit and approach velocties

I have drones in my game that need to approach and orbit a node and shoot at it. Problem is I want to stay away from a real physics simulation, meaning I don't want to give the node and drone a mass ...
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2answers
443 views

iphone 3d library with physics

are there any light 3d iphone libraries that must have: Physics ( ragdoll physics ) 3D scene graph Advanced lighting (lightmapping and stuff) Sound engine Ability to import 3D model from blender, 3d ...
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181 views

Is it possible (from the vertex shader) to always draw at specific pixels?

I am wondering if I can (if possible) make a vertex shader that will always make the pixel shader draw everything in 1 pixel, at position 0,0. I know this sounds crazy, but it's needed in the ...
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419 views

What maths should I learn for game programming, and what aspect of programming does it relate to? [duplicate]

Possible Duplicate: What math should all game programmers know? Obviously a good knowledge of maths is essential for good programming, my maths isn’t the best ( I didn’t pay attention in ...
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310 views

How do I rotate a segment + normal so that the normal is (0,-1) and the segment is now axis aligned

I have an arbitrary line segment, which may or may not be axis aligned along with its normal eg: Segment(Coord(-1,-1), Coord(1,1), Coord(-1, 1).normalize) which represents a line segment with a 45 ...
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6 views

Determine if an object is inside a ship's turn radius, rotation via torque

I have a 3d space game where all ships move around using physics. I am trying to determine if a given object is reachable by a ship at a given velocity and turn radius. I believe the formula for turn ...
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1answer
24 views

unity3d - Object keeps falling down

I have an object that moves towards another object using this line : transform.position = Vector3.MoveTowards(transform.position, target.transform.position, speed * Time.deltaTime); this is it's ...
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21 views

Collision between a sphere and a mesh(height-map)

I am trying to implement a method that detects the collision between a sphere and a mesh and reflects the vector of speed. I have a method, that detects a collision between a sphere and a triangle and ...
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37 views

Implementing wall-sliding physics in THREE.js

Yo, Basically I want to make a 3D environment where the player can walk around a 3D world, and collides with objects / terrain like any other 3rd person / 1st person game. The world can contain any ...
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13 views

Pros and Cons of GJK vs MPR [closed]

I've heard that MPR is easier to understand and implement, while GJK converges more quickly so is more efficient. I've also heard that you can use EPA with GJK results to get a penetration distance / ...
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33 views

Ball oblique impact physic in Java?

I know Q3 + Q4 = 90 I searched internet and many physic topics, but not found how to calculate this values in Java? (I found V3 and V4 but not found Q3 and Q4) So how can i calculate V3, V4, ...
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72 views

Circle-Circle collision resolution

This seems easy but I can't figure it out, when I have one circle(c1) collide with another(c2) I give the c2 circle the heading of c1 and send the c1 circle on the normal vector to the heading (the ...
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42 views

(Unity) Physics based movement vs Straight position change

Unity provides a cool physics engine for game development and I want to utilize it in my game. Shorter version I want to use physics engine for everything else other than character movement because ...
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42 views

Twin-stick controls for a cohesive group of agents

I'm trying to implement a classic twin-stick controller for a group of physics-based game objects. Here are the rules I'm trying to follow: Agents always stay close to each other within a certain ...
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41 views

How to slow down a Sphere smoothly in a world controlled by force and stop it (Unity 5)?

I am a beginner and I started to use Unity 5. I play with tutorials on the site and documentation. I was basically testing springs, physics materials etc. I have a problem understanding probably a ...
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19 views

How do I find at least the closest penetrating point with SAT? [duplicate]

For more accurate simulations, I want to find the closest point of another polygon to one polygon's center when they collide. Is this possible with the SAT algorithm? Is it a good strategy at all for ...
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23 views

JBullet Only Updates Position when I update it in Code

The title is a bit weird...but here it goes: I have JBullet configured so that I can move things in my code, as the game tick structure is something like this (the update code located in ...
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(LibGDX/JAVA) How can I get a rectangle to rotate with this pendulum so I can start detecting collisions?

One of the objects in my game is a pendulum that swings in a semi-circle. This is done by having an update() method like this: public void update() { angleAcceleration = +1.81 / length * ...
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45 views

JBullet move object rigidbody in code?

I am trying to move an object's Transform (of a coded class, these are for the rendering engine), then convert it into a JBullet Transform. After that, I try to apply any movement to the JBullet ...
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33 views

Leapfrog integration vs Euler integrator

I am looking at various integration methods for my n-body simulation and I'm slightly confused about actual implementation of leapfrog integration. According to the wikipedia page leapfrog method is ...
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1answer
149 views

Unity 2D - Pixel perfect movement using physics

I'm trying to make a game in the style of many NES games and I'd like object movement to do two things: I want to move an exact number of pixels per update. I want, for lack of a better term, ...
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1answer
78 views

Making a gameObject push the player

I am working on a Unity 3D game for Oculus and I have problems with making my objects to apply physics on a player. So getting rid of a CharacterController and using something like a rag doll is not ...
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101 views

Anti-Roll bar doesn't work

I'm making a racing game in Unity that has trucks as vehicles. For the truck movement, I'm using WheelColliders. After some testing, I found out that after a certain speed (~60km/h), turning made the ...
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51 views

How can I handle ball interaction with lanes in a pinball game?

In a pinball game, how can I handle collision or constraints on the ball for convincing movement on those highway rails/tracks? I assume using physics and a mesh collider would not work, even when ...
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48 views

Dragging an object and moving it back to it's original position on release?

I'm making a small game, and I'm trying to add this mechanic where if you click on an object and move it, then you release the object it will snap back to it's original position. Currently, each ...
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1answer
79 views

LibGDX - Executing 2 different touchDown events in the same method

On the bottom left of my screen is a circle with an Arrow and on the bottom right is a circle with a gun. If the player is in jetpack mode and the Arrow "button" is clicked he flies like flappy bird ...
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69 views

Immovable object impact physics

I am trying to do some physics calculations from scratch, and as a result am creating a small bouncing ball example. However, I have some issues getting correct results from my impact physics when the ...
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62 views

moving a character in sprite kit

So I've created a game in which a number of tiles are created from a txt file to create a level for the player to navigate through, but I'm having trouble moving the player. func ...
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17 views

Java JBullet models not colliding [duplicate]

Hello I wan't to do model collsion in JBullet but that don't won't to work. Models look like have some invisble holes. Here the code for creating collsion shape: int triangles_count = (int) ...
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41 views

Stuck on a steering problem

i'm building a car game, and currently working on the steering. i would like to change the motion of Z rotation so that the car rotates around the Z axis when the wheels are turned. I can't set the ...
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13 views

How to experiment for the value of gravity in Libgdx? [duplicate]

I am following a guide on how to play a flappy bird clone in the LibGdx framework. -http://www.kilobolt.com/day-5-the-flight-of-the-dead---adding-the-bird.html I am currently on the part where the ...
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40 views

How to get rid of “ghost mode”?

I've got few Spatials (mostly boxes) in my space. Player is able to move main Spatial using mouse or keybord. But now every Spatial can go through another. Like in a ghost mode. How can I get rid of ...
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126 views

Custom arcade physics rate (e.g. bullet time)?

Is there a way to modify the rate that physics is applied, either globally or on a per-sprite basis in Phaser? That is, how can I slow down or speed up the rate at which sprites move around, or fall ...
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54 views

Calculate hit-normal from collision

I am trying to implement a swept test collision between an AABB and a Line Segment and I found this implementation working great ... Except that it doesn't cover how to calculate the hitNormal and ...
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1answer
78 views

Launch Velocity for Simple 3D Projectile [duplicate]

This is a pretty easy question, but I can't quite figure out the answer. I have: The initial position of a projectile. The gravity vector. The (stationary) target I want to hit. A maximum launch ...
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23 views

Impulse resolution with varying time delta

I thought I'd try building a basic 2D physics engine, and I'm currently writing the impulse resolution part of it (yeah, not very far into this). Using quick internet tutorials like this as a guide, ...
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1answer
44 views

Using box2d with starling

In my game I have a Main class in which i am initializing starling framework by passing Game class like below myStraling = new Starling(Game , stage); In the game class I have Instances of Welcome ...
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Calculation technique for 2D inertia tensors?

Just wondering what the techniques are out there. It's only 2D so I figured there'd be a good chance for there to be a "one size fits all" solution out there that's essentially an analytical solution. ...
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250 views

LibGDX Bounding Rectangles

I'm creating some rectangles surrounding my sprites for my player and bullet class to detect collisions with the overlaps method in Intersector class of LibGDX. I have a question: When I instantiate ...
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How do I apply Farseer Physics Engine Collision on my image? I tried it on my codes and it is not working

How do I apply Farseer Physics Engine Collision on my image? I tried it on my codes and it is not working. PoolGameSingle poolgame = new PoolGameSingle(); var cue = poolgame.CueStick; ...
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150 views

How to determine velocity from force

I recently started a project with the intention to master the physics aspect of Unity. Although I have a good knowledge of Unity, I never had the opportunity to work on game that makes extensive use ...