is one of the first additions I made (after the parts, enemies and a wrench). Unfortunately, I have not thought about working on graphics, so I made a big red square, and I'm happy for the moment.
I decided to manage the platform as collisions with the ground: to detect if the hero touche la plateforme, et si elle se trouve sous ses "pieds". Cette méthode a été reprise du
wiki de la PAlib
:
if (héros après le côté gauche) && (héros avant le côté droit){
if (point tout en bas du héros) && (vitesse>=0){ <<8;}
if (héros après le côté gauche) && (Hero before the right side) {
if (point at the bottom of a hero
) & & (speed> = 0) {With that, the hero can walk on the platformstopped. Because if you put the platform in motion, he just dropped once he is in a vacuum.platforms all have a variable that defines the direction in which they move (-1 for left, 1 right), and their horizontal speed is 2 pixels / frame.
So when the platform is on the hero, is added to the position of the hero of the platform speed, multiplied by the variable that contains the direction. And we get it this:
if (hero after the left side) & & (heroes before the right side) {
if (point at the bottom of a hero
) & , & (speed> = 0) {héros.x + = (* variable speed horizontal direction of movement)
} And voila, my first REAL article on development. I'm not particularly good at explaining my theory of operation, but I have not seen a tutorial dedicated to creating a platform, so I tried to explain as best I could how I am taken, hoping that I can help someone.
-
-No image for this tutorial: a static image is useless, and make a GIF I am not gone through his mind (it does, but no).
No such either, but you'll have if I release the source code one day of WTN.
We come to the last important point for the platforms, the change of direction. Indeed, if a platform keeps moving and never stop, it will not help much (except for a level with a horizontal scorlling forced).<<8;If like me you use a map of collision, the rest is very simple: detect the collision of a tile platform with specific, dedicated solely to that. Then, simply multiply the variable direction by -1, which has the effect of changing the direction of the platform.
Note:
As explained on the wiki PAlib
, I use the fixed points for my variables. That's where come the
, I use the fixed points for my variables. That's where come the
-I noticed that the hero was moving systematically (* Variable speed horizontal direction of travel)
pixels when the platform comes into collision with the tile that allows it to change direction (and it's over, of course). So I fiddled a bit by adding the inverse of this value when the hero is on the platform and that it bumps against one of the famous tiles. It worked, so I stopped there. If someone finds another solution, he makes me share in the comments. No such either, but you'll have if I release the source code one day of WTN.
to learn C, and another to create a set of platform to the Wiki PAlib, I use (in two parts, here 
A l'époque où j'ai débuté ce projet (décembre 2007 si je me souviens bien), je voulais simplement faire un simple pong : deux raquettes, une balle, un truc qui compte les points et basta. Mais au fil du temps, j'ai décidé de changer les sprites : quelques adapatations plus tard, me voila avec un superbe fond venant de Super Mario Bros., et les deux frères qui grimpent aux poteaux pour se renvoyer un boule de feu. 
J'ai donc ensuite voulu changer l'affichage des scores. Après quelques réflexion, j'ai décidé de Goombas bring down the castle. It took me some time, because at the time, I do not control the cards collisions. But I have come to end, and I liked the result enough. 
of Mollusk (who was thanked for this wonderful passage lib). So I would use this blog to also inform you of my plans and their progress.