Quintus | Quintus is an easy-to-learn , fun-to-use HTML5 game engine | Game Engine library

We try this in SWI Prolog (to be precise: SWI-Prolog (threaded, 64 bits, version 8.1.19-37-gc4fb81227))

On SWI Prolog's foreach/2, we read:

The compatibility of the "aggregate" library which contains the foreach/2 predicate is stated to be

Quintus, SICStus 4. The forall/2 is a SWI-Prolog built-in and term_variables/3 is a SWI-Prolog built-in with different semantics.

From the SICStus Prolog documentation:

foreach(:Generator, :Goal)

for each proof of Generator in turn, we make a copy of Goal with the appropriate substitution, then we execute these copies in sequence. For example, foreach(between(1,3,I), p(I)) is equivalent to p(1), p(2), p(3).

Note that this is not the same as forall/2. For example, forall(between(1,3,I), p(I)) is equivalent to

\+ \+ p(1), \+ \+ p(2), \+ \+ p(3).

The trick in foreach/2 is to ensure that the variables of Goal which do not occur in Generator are restored properly. (If there are no such variables, you might as well use forall/2.)

Like forall/2, this predicate does a failure-driven loop over the Generator. Unlike forall/2, the Goals are executed as an ordinary conjunction, and may succeed in more than one way.

Taking the example on the SWI Prolog page, without the final unification:

I'm working on a program to aid me in world-building that randomly generates a settlement (hamlet, village, town, city) based on a nation (German, Latin, Eastern) that the user chooses. I've integrated a sort of settler generation system to create settlers within the settlement, each with a name, age, gender, and wealth using a constructor and holding the results as objects within a vector. Unfortunately, the program creates an entire population of clones, filling the vector with settlers with the same name, age, etc.

I've tried initialising the Settler class' constructor in a for loop, but that hasn't changed anything except causing you to get a different set of settlers each time you request information on one of them.

I am receiving an object array looking like this: I apologise, this is in dutch, it shouldnt be a problem but it does look a bit out of place.

I want to modify the platformer game that I find in codepen. http://codepen.io/loktar00/pen/JEdqD the original is like the below image.

I want to change it to be:

I want to zoom in the viewport to player and making a camera-like view where I could scroll a level within a canvas element.

Like this game http://www.html5quintus.com/quintus/examples/platformer_full/

The viewport and camera is tracking the player.

This is my code: