C# Monogame RPG Made Easy Tutorial 2 - GameScreen Video Lecture | Monogame Tutorial: Design your own Game - Game Development

caught up me so what's up everybody and
welcome to your second RPG tutorial
using model game so our last tutorial
was really exciting well not really but
we got some stuff done we got the d
screen muncher class done and what I
really need to explain to guys is that I
really really really want to get to the
fun stuff but before we can get to the
fun a full-fledged graphics battle
scenes all that good stuff we have to
get rid of the boring stuff first right
we have to get the it's kind of like oh
when you're building a website I guess
you got to get the backend stuff done
and then you got to get the front and
stuff the beautiful stuff that everybody
sees right you have to get the stuff
done that's behind the scenes uh maybe
it's like a movie or whatever the stuff
behind the scenes is boring but then
when you actually that movie or that TV
show or whatever it looks so amazing so
that's what we're doing right now we're
building the background stuff the
foundation and then when it comes one
that comes to the good stuff then it's
gonna be easier and we'll be able to
program the more fun stuff in a in a
better fashion in a more organized
fashion anyways enough talking about
that so what we're gonna do in this
tutorial is we're going to we're going
to create the base class for the screens
and then we're going to actually display
something from a screen on a window to
actually show you how the screens work
in action and the screens aren't gonna
be finished today but we're just gonna
or in this tutorial sorry but we're just
going to uh it's not gonna French table
we're just gonna just do some of the
outlining stuff to show you how
everything is done so I've created a
brand new class called game screen and
the game screen class is going to be the
base class for every other screen out
there so when we say base class
ultimately the first thing that normally
comes people
mind is a inheritance and polymorphism
so we are going to be using inheritance
and polymorphism in this program so what
what happens when we need to use
polymorphism we need to use virtual
classes I mean not virtual classes sorry
sorry that was stupid
we need to use virtual methods so what
we're going to do is we're going to have
four virtual methods we're gonna have a
virtual void load content this one has
no parameter when our virtual void
unload content we're going to have a
virtual void update and as you guessed
we have the game time and last but not
least we have a virtual void and we
withdraw and you probably guessed it we
have a sprite match you smart ones
anyways so uh okay sorry so now that
we've gotten that done what did I do
wrong I did something wrong I don't know
what I did I just felt it wrong oh I'm
gonna do it I'm so sorry okay
so we have to include graphics as well I
am so sorry so now that that's done we
have a little Content unload content
update and draw and I won't explain what
these methods are gonna do so we don't
have to really react splain it so what
we're gonna do is we're gonna make a
protected member and I'm pretty sure if
you have a good working knowledge of of
c-sharp and XNA you know what protected
means so what we're going to do is we
also gotta add in the content and we're
gonna make an instance of content
here so what we had to do is real
quickly going to go to the screen
manager and we're going to make a public
content manager manager instance we're
going to say content will get a private
set and get so all in this little
content method right here we're going to
say that this content is equal to
content sorry new content manager
content service provider and we have
content and quotations and what we're
going to do in our game screen class
we're going to do something extremely
similar we're going to take the content
from here when I say Content Manager but
we're going to use the screen manager
content service provider and then we're
going to add content in quotations okay
so it's exact same thing but what we're
just going to get the screen managers
content rather than the content from a
parameter okay so what's this going to
do essence is protected we're going to
have content throughout all of our game
screen and this is very very beneficial
to us so whatever we load in object so
we do something when we load in images
or sounds or whatever you want to load
in we want to unload what we loaded and
we're done with that current screen so
we're just gonna make it call to content
unload and now we'll unload everything
that we've loaded using the Content
Manager and we have our update we have
our drop but we're not going to really
do much with that right now so what
we're going to do right now is we're
going to create another class and we're
going to call this splash screen so
we'll this splash screen class is gonna
be the first screen that we actually see
and as you guessed as you probably guess
we're going to inherit from the game
screen class so what are we going to do
we're going to override everything
now before I override it I'm gonna
include the namespaces that are needed
that's all so I'm going to override the
unload content the update and the draw
okay so now that everything is there uh
we gave you got everything set up now
we're not gonna do anything fancy
schmancy or whatever all we're gonna do
is just draw some text oh drawstring oh
oh we don't have a fun you know what
let's let's draw an image because Texas
boring and which is so much better right
so much better anyways so we got the
texture 2d and we're just going to call
it image and we're going to have a
string called path and I'm going to put
this here because it has significant to
do with the next tutorial so I have this
there for a reason so we're going to say
image is equal to content dot load ever
loading in a texture 2d and we're
loading the path now right now we're
just going to say the path is equal to
let's say a splash screen slash image
and I don't have an image yet but we'll
be adding one quite soon so let's just
say that's the path to our image uh we
have our update and our draw will just
say sprite batch dot draw and we will
draw our image a vector to zero and no
tinting at all so what we're going to do
now is we're going to go to our screen
manager class and we're going to make a
game screen and we're going to call it
current screen so that's going to be the
screen that is currently being displayed
so in here we'll just set current
equal to new splash screen and remember
this is polymorphism in action right now
so this is a type game screen but since
the splash screen is derived from the
game screen we can call the override we
can call the override and match and
sorry we can call the overriding methods
now so now we're going to make a call to
current screen load content we have
current screen unload content we have
our current screen dot update and last
but not least we have our current screen
dot draw okay draw
okay so we've gotten that finished off
now so last but not least you actually
have to add in a image I'm pretty sure
you know how to add an image what I want
to do just create a folder I'm not sure
if you'll be able to see this but I've
created this flash green folder and I'm
going to be adding in an image an
existing image uh let's see ah let me
take one from an old project or take
from here so I have my image is called
image one and uh so I got to change out
there oh is it not loaded in is it yeah
okay so it has loaded in and what's
going to happen what should happen is it
should be drawn to the screen and it
isn't that's quite embarrassing let's
see what we did wrong so the screen
manager doesn't exist in the current
context that does not make any sense you
know so let's see what is going on okay
so that was pretty weird
I was reading on the internet it was
saying something but the target
framework I don't know for some reason
it just wasn't detecting my namespace if
you get an error like that let me know
but I just all I did was just
right-click and I said to set a start up
project um and once I did that it it
just worked
I don't know uh but if you have a
problem then please let me know I will
help you guys out but I think it will
just my project if you're continuously
having problems and start a new project
and try to get that up but it shouldn't
really happen to you sorry so what we
want to do is uh you want to before you
run this you want to go to game mode ah
yes I forgot to do this and we want to
do sprite batch begin and sprite backup
ends or else you're gonna get air okay
so let's run this and voila
you can kind of see it sort of maybe so
what I like to do is I like to change
the black sometimes and voila looks very
beautiful coding it easy in light blue
or electric blue whatever it is so
anyways that is it for this tutorial I
hope you enjoyed it thanks for watching
or look for to next one and bye for now
you