#JAVA 3D RACING GAMES HOW TO#
#JAVA 3D RACING GAMES UPDATE#
#JAVA 3D RACING GAMES FULL#
#JAVA 3D RACING GAMES CODE#

background - 3 parallax layers for sky, hills and trees.

Images and SpritesД«efore our game loop starts, we load 2 separate sprite sheets: Game loop works go back and read those earlier articles (or post a comment below!). Run : function ( options ) frame () // lets get this party startedДЄgain, this is a rehash of ideas from my previous canvas games, so if you need clarification on how the

render - the game world whenever the browser allows.

#JAVA 3D RACING GAMES UPDATE#

update - the game world with a fixed time step.The idea being that each of my 4 examples can call n(.) and provide their own versions of Games to come up with a fixed time step game loop using

#JAVA 3D RACING GAMES CODE#

I wonвЂ™t go into much detail here, IвЂ™ll simply re-use some of the code from my previous If youвЂ™ve followed any of my previousД«oulderdash) then youвЂ™ll have already seen

A Simple Game LoopД«efore we can render anything, we need a game loop. Hopefully you can tell from the name and context what theДЄs usual, the source code is the final documentation. I will only be detailing methods from common.js if they are relevent to the actual game, rather

Game - generic game helpers such as an image loader and the game loop.

Util - generic utilities, mostly math helpers.

I will keep some re-usable methods inside common.js within the following modules: However, since I am going to build 4 separate versions (straights, curves, hills and sprites) I mentioned in the introduction that this code does not exactlyДЇollow javascript best practices - its a quick and dirty demo with simple global variables andДЇunctions. Setting up fov as one (of many) variables we will be able to tweak in order to fine This way we can choose to вЂzoomвЂ™ the camera if needed.ДЄssuming we are projecting onto a normalized projection plane, with coordinatesДЇrom -1 to +1, we can calculate d as follows: Instead of hard coding a value for d, its more useful to derive it from the desired

#JAVA 3D RACING GAMES HOW TO#

One last piece of the puzzle is how to calculate d - the distance from the camera to the Really wanted to stick to old-school вЂjust-enoughвЂ™ pseudo-3d to build an outrun-style game. Well just use WebGL (or equivalent)вЂ¦ but thats not really the point of this project. To perform more robust 3d mathematics, and if we were going to do that then we might as

#JAVA 3D RACING GAMES FULL#

NOTE: In a full blown 3d system we would more formally define a Vector and a Matrix class

computers - where 0,0 is at the top-left and the y axis goes down, as shown below:.

math - where 0,0 is at the center and the y axis goes up and.

The scale equations take into account the difference between:.

The project equations are variations of our вЂlaw of similar trianglesвЂ™ above.

The translate equations calculate the point relative to the camera.

NOTE: in a true 3d system a rotation step would come between steps 1 and 2, but since weвЂ™re going to be faking curves we dont need to worry about rotation ProjectionДЄnd so we can present our formal projection equations as follows:

scaling the projected coordinates to physical screen (in our case canvas) coordinates.

projecting camera coordinates onto a normalized projection plane.

translating from world coordinates to camera coordinates.

WeвЂ™ve also assumed that the camera is at the origin of our world when in This sounds nice and simple in diagram form, but once you start coding its easy to get a little confused because we haveД«een a bit loose in naming our variables and its not clear which represent 3d world coordinates and You can see that for both x and y, what we are really doing is scaling by a factor of Where w = half the width of the road (from camera to road edge) We could have also drawn a similar diagram from a top-down view instead of a side-on view and derived a similarД®quation for calculating the screen x coordinate as Then we could use the law of similar triangles to calculate Will start off here with v1, building very simple straight road geometry and projecting it onto our HTML5Д«efore we get down to the implementation, lets use some basic trigonometry to remind ourselves how to projectДЄt its most basic, without getting into vectors and matrices, 3D projection uses a law of similar triangles. We will do it gradually, over the course of the next 4 articles, but we NOTE: LouвЂ™s page doesnвЂ™t render well in google chrome - so its best viewed using Firefox or IEДЇinished reading LouвЂ™s article ? Great! WeвЂ™re going to build a variation on his вЂRealistic Hills UsingДЈd-Projected SegmentsвЂ™ approach. Its the main source of information (that I could find) online about how to build a pseudo-3d racing game.

enable keyboard support to drive the carД«efore we do any of that, lets go off and read LouвЂ™s Pseudo 3d Page.

Get started building a pseudo-3d racing game ? Previously we introduced our outrun-style racing game, but how do we

Java 3d racing games