pomax / pjs-2d-game-engine Goto Github PK

I'm trying to code some platforms that appear and disappear. If the player is above the platform, when it disappears, the player should fall down. Now the player stays at the position where the platform was an needs jumping to update its position. Should I call some function from the class Player to make it to update its position and fall down after removing the platform?

Thanks for your help!

To prevent O(n^2) collision detection, make sure everything that performed collision detection X-to-Y does not also have a codepath that checks Y-to-X

Right now it's a naive bounding box check, which will fail for angled boundaries.

Relevant code entries:
https://github.com/Pomax/Pjs-2D-Game-Engine/blob/master/Computer.pde#L30
https://github.com/Pomax/Pjs-2D-Game-Engine/blob/master/Positionable.pde#L415
https://github.com/Pomax/Pjs-2D-Game-Engine/blob/master/Boundary.pde#L301

Taken together, these tell the story of code that does what it's supposed to, but not what we want - Boundary.redirectForce/4 should be able to indicate whether we're still on the boundary or not, rather than simply whether or not the forces were manipulated.

this is most obvious when jumping through a corner where two boundaries meet. There are multiple trajectories possible where the actor ends up going through each boundary in a permitted way, even though the combination of the two boundaries should result in a block:

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Tried making it work with Processing 2.1 and its here https://github.com/carlmacdiarmada/spriteengine I could be doing something wrong, doesnt recognise classes, soundmanager, spritemap etc

aiming with the mouse on a level layer with default transforms +0/0 *1/1 works fine, but with non-default transforms the coordinate transformation from "mouse coordinates" to "level coordinates" seems very off.

Fiddling with the viewbox settings does not appear to restrict the draw context correctly. This might be the cause for massive slowdowns seemingly caused by the amount of repeated ground tiles being drawn.

Whilst using some methods from the ViewBox class in my code, I encounter a Null Pointer Exception with the following line(s) of code:

setLevelLayer(who.getLevelLayer());
float ax = round(who.getX()), ay = round(who.getY());

I'm using Processing 3.3.6, could this be the issue?

First of all, thanks for the awesome library!

I'm working on a simple Processing (no JS) project for my bachelor. In my PDE file I need the setup() and draw() methods because I'm using another libs that require it so. Would it be possible to create an instance of the Player class to create a player object, like it is possible with the CollisionDetection class?

Thanks for your help!

Dissolving the amount of gravity the closer something is to the ground would reduce lag. I have done this with many languages such as Processing and WebGL, trust me, it would help.

rather than doing viewbox positioning manually, this should be done automatically, where we pass the viewbox one or more actors, and the viewbox will then try to keep those in screen. This may effect zooming if there's multiplayer going on. This is good =)

fractional coordinates should be forced integer before image draws are executed, to ensure crisp rendering