(Original Image by Valerie Everett)
It is sometime necessary to move an object in a physics simulation to a specific point. On the one hand, it can be difficult to analyse the exact force you have to apply; on the other hand it might not look so good if you animate the object’s position directly.
A compromise that works well in many situations is to use a spring-damper system to move the object.
The trick is simple: we apply two forces—the one is proportional to the displacement; the other is proportional to the velocity. Tweaked correctly, they combine to give realistic movement to the desired point.
Read the rest of this entry »
Tags: damper, force, Game Development, game programming, physics, PID controller, Simulation, spring
A cellular automata system is one of the best demonstrations of emergence. If you do not know what cellular automata (CA) is, then you should go download Conway’s Game of Life immediately:
Conway’s Game of Life
Essentially, CA is a collection of state machines, updated in discrete time intervals. The next state of one of these depends on the current state as well as the states of neighbours. Usually, the state machines correspond to cells in a grid, and the neighbours of a cell are the cells connected to that cell. For a more detailed explanation, see the Wikipedia article.
Even simple update rules can lead to interesting behaviour: patterns that cannot be predicted from the rules except by running them. With suitable rules, CA can simulate many systems:
- Natural phenomena: weather, fire, plant growth, migration patterns, spread of disease.
- Socio-economic phenomena: urbanisation, segregation, construction and property development, traffic, spread of news.
Read the rest of this entry »
Tags: 2D, AI, algorithm, blending, cellular automata, Conway's game of life, Dev.Mag, diffusion, discrete dynamics, disease simulation, fire simulation, force, Game Maker, grids, optimisation, probability, random, sampling, Simulation, social dynamics, sum, tiles
I studied computer engineering at the University of Pretoria. I worked in game development for almost three years, before I joined InnovationLab to help them create interactive simulations and serious games. After two years, I got back into game development, working for I-Imagine. In 2010 I completed my honors degree, and I have recently taken up the reigns of the South African game development magazine Dev.Mag.
Some projects that I have worked on:
More music: http://www.youtube.com/user/hermantulleken2
Articles for Dev.Mag:
Email: herman.tulleken@gmail.com
Tags: AI, Dev.Mag, Game Development, Perlin noise, poisson disk, sampling, Simulation, tiles, tool development
Random steering is often a useful for simulating interesting steering motion. In this post we look at components that make up a random steering toolkit. These can be combined in various ways to get agents to move in interesting ways.
You might want to have a look at Craig Reynolds’ Steering Behaviour for Autonomous Characters — the wander behaviour is what is essentially covered in this tutorial. The main difference is that we control the angle of movement directly, while Reynolds produce a steering force. This post only look at steering — we assume the forward speed is constant. All references to velocity or acceleration refers to angular velocity and angular acceleration.
Whenever I say “a random number”, I mean a uniformly distributed random floating point value between 0 and 1.
Read the rest of this entry »
Tags: 2D, AI, artificial intelligence, blending, C++, Game Development, Game Maker, Perlin noise, probability, random, random distribution, random motion, random steering, response curve, Reynolds, sampling, Simulation, steering bahaviors, steering behaviours, vector field, wander, white noise
Game Maker is a great tool; it is especially suited for rapid development and small projects. However, as a project becomes bigger, it becomes more difficult to find things, easier to break it, and generally harder to work on. This is of course true for any production environment, and there are many things you can do to tame the beast of scale. Here are 60 things to make Game Maker projects more maintainable.
Read the rest of this entry »
Tags: editor, Game Development, Game Maker, good practices, maintainability, random, Simulation, tiles
Recent Comments