RogueLike Part 3

Monster Destroy Event 

Open you obj_monster the parent monster object

Add a Destroy Event and call the script scr_lootDrop() script

It will pass one argument the level of the monster that way the drops will be better based upon the monsters level

 Challenges

1. When you pick up gold loot it doesnt add to your gold fix this

2. The avatar in your gui that shows what items are equipped does not have the glow draw on them fix this

3. Your inventory does not show glow fix this

4. Add Sound effects for the following:

   1. Coin pick up

   2. Hit, miss and critical all different sounds.

   3. Death

   4. Background music

 Make Monsters get harder based on your level

We want the game to get harder the higher your level gets 

We will use a script from GML scripts to accomplish this

http://www.gmlscripts.com/script/exp_dist

 Randomly Generated Rooms

One of the concepts of a rogue like game is randomly generated levels so we will tackle that now

I will show you how to use the work of another coder and integrate it into your game.

We will use this https://marketplace.yoyogames.com/assets/489/grid-shadow-casting

Download the file here 

https://drive.google.com/file/d/1CEguYbEd7JRCqeOvvl2EaE20F9prg9sk/view?usp=sharing

Open the file and play the game check out how it works

Make sure you save the Grid Shadow Project so you can import its assets in the next step

 Add Scripts to your Game

You can add the assets from this game to your game without having to re-type the code

Open your game in another instance of Game Maker Studio

Now right click on the scripts folder and select "Add Existing Script"

Browse to the Grid Shadow Project folder usually found in C:/My documents / Game Maker / Projects Folder Open the Scripts folder and select all the scripts Press Open

This will import all the scripts into your game sometimes you have to add a comment to the script to make your game recognize the script

 Add other Resourced to you Game

We now need to add the other assets to your game from the Grid Shadow game

You will need the following added to your game:

• 1. Sprites

     1. spr_black

     2. spr_light

  2. Backgrounds

• • 1. bck_01

• 3. objects

• • 1. obj_createRoom

    2. obj_camera

    3. obj_torch

Add these in the same way as the scripts

 Create a New Room that will be randomly Generated

Create a room called room_random place this second after your roomSplash

Add two objects to your room_random

obj_createRoom and your obj_player

It doesn't matter where you put either of these objects

You will need to center your player sprite

 Make Changes to new assets

You need to make sure that the new assets will work with your game so lets go over each asset :

• 1. Room Size Make sure your game room size is a multiple of 32 mine is 1024 x 768 so it will work great 1000 x 750 wont work so adjust it if needed

  2. Player Name needs to be obj_player or you need to change it in obj_camera and obj_createRoom

  3. Torch Range obj_torch has a variable called Range this is how far the light travels in the grid change this if you want

 Player object Changes Create Event

This is where most of the changes take place first go to the Create event of your obj_player in your rogue game and compare it the the obj_player in the Grid Shadow game

Copy all the variables from the Grid shadow player to your players create event

Just like the torch object the Range variable is how far you player can see with light I changed mine to 4

Also change the depth of your player to -50

 Player object Changes to the Step Event

Compare the step events of the player objects

You will notice the the shadow grid movement checks for the x and y position before you move then if you have moved during that step it will update the grid to illuminate grids around your player based on the range variable

Your Step event will now look like this

 playerMove script Changes

You noticed that the movement in the player in the Grid Shadow game do not use collision detection but grid placement 

So if a floor tile is in the grid you are trying to move to it is allowed however if a wall is in the grid you cannot move

So we will have to change our check to add the grid check as well as the place_free check 

if place_free(x+xoff,y+yoff)

to the new grid check

if(ds_grid_get(global.mygrid, (x+xoff) div 32, (y+yoff) div 32) == 1)

We will have to change for all 8 keypress directions

 Test your Game

You should be able to move and stop when you come walls 

The areas you have visited before should be semi-grey the unexplored areas are blacked out

If you want the grey to to lighter or darker change the variable Shadow = 0.85; found in the Create Event of obj_main

You can also change the view of your room to make your game looked zoomed in

Go to the room_random and click on the views tab

A safe way is to cut the room size in half for both port and view like this:

Remember to tick Enable the use of Views and visible when room starts

And make the view follow you player 

 Add Items to your room

Now we have to figure out a way to add items to your room

The room is made up of tiles which are marked on the grid with a 0 or 1

0 = Wall. You cannot walk on that one

1 = floor. You can walk on that one.

So we can only place items like loot monsters traps etc on items marked as 1

This graphic shows what your room looks like numerically so we will cycle through all grid positions in the room and place items randomly only if it is on a position marked 1

 Create the Scatter script

Now that we understand how the room was created we can create the script

Create a script called scr_scatter_instance

It will have two arguments 

the type of item to scatter and the number of items to scatter

We will be able to use this script to create loot, monsters or anything else we want.

It will only create an item when it finds a floor tile that doesn't contains another object

 Call the Script

Now to call the script go to the obj_createRoom

Add a new code box and run the script we will create 10 loot objects

Test it out

Everything should work good you should be able to collect the loot and none of the loot should be inside of a wall

 Scatter Monsters

Now lets scatter some monsters everything is already set up to to this just run the scatter script again and pass the correct arguments 

We only want to scatter items if we are in the random room

Test it out

Oops something is wrong... The monsters can walk through walls and you can walk through them as well

Add rooms after splash room cut scenes that shows your player in the ordinary world

Then show the players call to adventure

Then show his refusal

Then show mentor helper

 Update Splash Room

Lets add a options for controls and a background

Make Two buttons one that says start one that says controls

I buttonized mine

Now create objects for each button

 Add Buttons to room

Add the buttons to the room

Add Create Event to control button and add a variable hoover = false; and pressed = false;

Add a Mouse Enter Event set hoover = true;

Add a Mouse Leave Event set hoover = false;

Add a Draw Event draw_sprite(sprite_index,hoover,x,y);

Make the start button a child of the control button

Test it out the buttons should change when mouse hoovers over them

Make Start button Start Game

Add a Mouse Left Released Event

 Backstory Dialog

You need to write a backstory about your character We will display this in scrolling text

Create a new object and call it obj_backstory 

This object will move as it draws the text creating the scrolling text effect.

The variable backstory will contain all the text for your backstory so it will be very long.

 Background Backstory and Player representation

Draw or find a background sprite I used mountains create it as a sprite

You need to be creative and draw upon your video game knowledge to create this page

I made an object that represents my character follow a path to add a mini animation while the dialog is scrolling.

Make three objects

obj_josh your player representation

obj_mountains the background image

obj_backstory the scrolling text

Now set the depth 

0 for backstory

-1 for mountains

-2 for player

Place the mountain object and the player object into your room_intro also place the backstory object near the bottom left corner of the room

This will make the objects stack correctly

 obj_josh 

The representative of your player is what you player looked like in the normal world

We will make him follow a path.

Paths are great ways to make cutscenes

Click on path and add a new one call path_josh

Now click on <select room background>

Uncheck Closed so the path is one way

Click near the player to start the path now each time you click you give another way point for the player to follow You can either choose Smooth Curve or Straight lines

Add a create event to Josh then start the path

Dialog Object

We need to create a dialog system so we can talk with NPC this will be used later when we talk to other NPC in the game

To do this we will follow the video of instructions here: 

https://www.youtube.com/watch?v=HdJ0ZUIs-AI

This will allow us to use the dialog system where every we want.

 Script Upgrade

Now we want to add to the scr_text so that the text will fade out so we will set up an alarm

• 1. 3 or more skills

  2. Skills must be visually show increases in the skills

  3. The skills must improve your player

 Ranged Weapon Ammo Sprite

My ammo sprite matches the ranged weapon sprite

 Ammo Object

Create a new object called obj_rangedAmmo

You also need to add two events to destroy the ammo

Outside Room and Outside View

Both need instance_destroy(); in them