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Game Maker: Maze Tutorial

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TABLE OF CONTENTS WHAT IS GAME MAKER? ................................................................................................................................................................... 2

GAME MAKER SCREEN ................................................................................................................................................................................ 2 LESSON 1 – THE CLOWN GAME .......................................................................................................................................................... 4

SPRITES - CLOWN ....................................................................................................................................................................................... 4 BACKGROUND – CLOWN .............................................................................................................................................................................. 6 SOUND – BOUNCE ...................................................................................................................................................................................... 6 OBJECTS – WALL & CLOWN ......................................................................................................................................................................... 6 CREATE EVENT – THE CLOWN ....................................................................................................................................................................... 7 ALARM EVENT – THE CLOWN ....................................................................................................................................................................... 9 COLLISION EVENT – THE CLOWN HITS A WALL ................................................................................................................................................ 9 MOUSE EVENT – HIT THE CLOWN ............................................................................................................................................................... 10 ROOMS – ENTER THE CLOWN ..................................................................................................................................................................... 11

LESSON 2 – THE MAZE GAME ........................................................................................................................................................... 12 SPRITES – BASIC WALL, PERSON & GOAL...................................................................................................................................................... 12 OBJECTS – BASIC WALL, PERSON & GOAL .................................................................................................................................................... 12 EVENTS/ACTIONS – PLAYER MOVEMENT ...................................................................................................................................................... 12 ROOMS – MAZE 1 .................................................................................................................................................................................... 14

LESSON 4 – MAZE GAME PART 2 ...................................................................................................................................................... 15 SPRITES – DIAMONDS & 3-D WALLS ........................................................................................................................................................... 15 SOUNDS – MUSIC & SOUND FX .................................................................................................................................................................. 16 BACKGROUND – ROOM & SPLASH BACKGROUND ........................................................................................................................................... 16 FONTS – SCORE FONT ............................................................................................................................................................................... 17 OBJECTS – DIAMONDS & 3-D WALLS .......................................................................................................................................................... 17 CONTROLLERS .......................................................................................................................................................................................... 20 ROOMS – SPLASH PAGE ............................................................................................................................................................................ 21

LESSON 5 – MAZE GAME PART 3 ...................................................................................................................................................... 24 SPRITES – MONSTERS, BOMBS & BLOCKS ..................................................................................................................................................... 24 SOUNDS – OTHER SOUND FX ..................................................................................................................................................................... 25 OBJECTS – MONSTERS, BOMBS & BLOCKS .................................................................................................................................................... 26 MONSTER COLLISIONS ............................................................................................................................................................................... 27 THE BLOCK .............................................................................................................................................................................................. 28 MONSTER MOVEMENT ............................................................................................................................................................................. 29 THE HOLE ............................................................................................................................................................................................... 31 THE BOMB, TRIGGER & EXPLOSION ............................................................................................................................................................. 31 PLAYER SPRITE UPDATE ............................................................................................................................................................................. 33 SOUNDS - LIFE ......................................................................................................................................................................................... 33 OBJECTS – PLAYER & LIFE .......................................................................................................................................................................... 33 ROOMS – ADDITIONAL .............................................................................................................................................................................. 34

LESSON 6 – COMPLETING THE MAZE GAME ..................................................................................................................................... 36 SPRITES – ONE RING TO RULE THEM ALL ...................................................................................................................................................... 36 GAME INFORMATION ................................................................................................................................................................................ 37


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WHAT IS GAME MAKER? Game Maker is a program that can be used to create games quickly and easily, and without the need to learn a programming language. Although the program allows you to create a game using the Game Maker scripting language (GML), it is possible to create a game without using any programming code.

Game Maker works by using a series of events and actions to perform certain tasks in the game. An example of this could be that when the left arrow key on your keyboard is pressed (event), a player on the screen will move left (action). A summary of all the Game Maker events and their primary function is included after the final lesson.

The following tutorials are based on the official PDF files available on the St Peters Intranet as well as from the official Game Maker website. They have been modified slightly to make them easier to follow and understand.

Before You Start You will need to copy the Game Maker folder from the S:/Resources directory to your home (H:) drive.

GAME MAKER SCREEN After you start Game Maker the following screen should appear. Click on the Continue Using the Lite Edition button.


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If you are starting Game Maker for the first time it will be in Basic Mode. You will need to switch to Advanced Mode as it has additional options that you will need a little down the track.

To change to Advanced Mode, click on the File menu and select Advanced Mode.

The main components used to create games in Game Maker include the following:

Component Description Prefix Example

Sprites This can be an image or a series of images such as animated gifs. Sprites contain additional properties such as transparency, width, height, bounding box, collision detection.

spr sprPlayer

Objects These are the ‘living' actors that are given behaviours which respond to events. For example, the arrow keys (events) will initiate their movement across the screen (actions).

obj objPlayer

Sounds This can include sound fx (e.g. bouncing ball, laser shot) or background music for the game. Game Maker allows the mp3, midi or wav format.

snd sndMusic

Backgrounds These are used to add background images to the game. This background can either be static (still) or animated.

bgr bkdRoom

Room Rooms are the stage where the objects ‘act'. - -

The other components of the Game Maker screen (paths, scripts, time lines) are used in the Advanced Mode. They will not be needed at this stage of the tutorial.


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LESSON 1 – THE CLOWN GAME You are going to create a simple game that involves using your mouse to click onto a clown that is moving around the screen.

Resource Files The files needed for this tutorial are located in the Lecture Resources/Resources 2 directory in the Game Maker folder that was copied earlier.

SPRITES - CLOWN 1. Create a new Game Maker file (File>New) then save as CLOWN. Remember to save the file every few minutes.

2. You will need to add a number of sprites for this game. To do this right-click on the Sprites folder and select Create Sprite.


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3. Click on the Load Sprite button and select the clown.bmp file from the Resources 2 folder. Ensure that the Remove Background box is checked (this will make the background transparent) then click Open.

Type sprClown in the Name box then click OK.

4. Repeat the last two steps and load the wall image using an appropriate sprite name, e.g sprWall.


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BACKGROUND – CLOWN 5. Right-click the Backgrounds folder and select Insert Background.

6. Click on the Load Background button and select the background.bmp file then click Open.

Type background in the Name box then click OK.

SOUND – BOUNCE 7. Right-click the Sounds folder and select Insert Sound.

8. Click on the Load Sound button and select the bounce.wav file then click Open. Type sndBounce in the Name box then click OK.

9. Repeat the last two steps for the click.wav and music.mid files using appropriate sound names, e.g. sndClick, sndMusic.

OBJECTS – WALL & CLOWN 10. Right-click the Objects folder and select Insert Object.

11. Click on the Object Selection button and select sprWall. Type objWall in the Name box and tick the Solid and Visible checkboxes then click OK.


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12. Repeat the last two steps for the sprClown sprite but do not make it solid.

Events/Actions Attaching events and actions to objects gives ‘life’ or interactivity to the game. An object might react to an event (such as a collision with the wall) and it’s re-action might be that it bounces back off the wall.

There are many events and actions that can shape your game. Rather than explain the function of each event and action available in Game Maker, you will learn some of these as you construct the Clown game. Use the Help menu in Game Maker if you wish to learn a little more about them.

CREATE EVENT – THE CLOWN 13. Ensure that the objClown object is active then click the Add Event button and select Create.


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14. In the Main1 action list select the Play a Sound action. Select the sndMusic sound file and set the loop value to true. This will cause the music file to repeat forever. Click OK.

15. In the Move action list select the Move Fixed action. Click all 8 directional buttons. Don’t include the centre direction as this will stop the object from moving. Set the speed to 4 (you can change this to a higher value if you think the clown is moving too slowly) then click OK. Note: By selecting the 8 different directions, Game Maker will randomly choose which direction to move at the start of the game.

16. To make the game less predictable we will add an alarm clock. In the Main2 action list select the Set Alarm action. Set the number of steps to 50 and the in alarm no to Alarm 0.


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ALARM EVENT – THE CLOWN

17. Click the Add Event button and select Alarm then Alarm 0.

18. From the Move action list add the Move Fixed action. Click all 8 directional buttons and set the speed to 0 and check the relative box then click OK.

19. From the Main2 action list add the Set Alarm action. Set the number of steps to 50 and the in alarm no to Alarm 0.

COLLISION EVENT – THE CLOWN HITS A WALL Ensure that the objClown is still open…

20. Click the Add Event button and select Collision with objWall event. In the Move action list select the Bounce action. Accept the default settings and click OK.

21. In the Main1 action list select the Play a Sound action. Select the sndBounce sound file and set the loop to false (this will play the file only once). Click OK.


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MOUSE EVENT – HIT THE CLOWN

22. Click the Add Event button and select Mouse then Left button. In the Main1 action list select the Play Sound action. Select the sndClick sound file and set the loop to false then click OK.

23. In the Score action list select the Set Score action. Set the new score value to 10 and check the Relative box (this will ensure that the score keeps accumulating by 10 points) then click OK.

24. In the Move list, add the Jump To Random action and set both snap options to 0.

25. In the Move list add the Move Fixed action. Click the middle (stop) directional button, set the speed to 0.5 and check the Relative box (this will ensure that the speed of the clown gradually increases each time you hit it) then click OK.

Check that the events and actions match the list below: Create Alarm 0 Collision with objWall Left pressed


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ROOMS – ENTER THE CLOWN

25. Right-click the Rooms folder and select Insert Room.

26. Because the size of the sprites are 32 x 32 pixels it would make placing the objects in the room a lot easier if the Snap x and Snap y values were set to 32 (located at the top of the room dialog).

27. Click on the background tab then click the object selection button and select the background that was created earlier.

28. It is now time to add the objects that will form the basis of the clown game. Click on the Objects tab then click the object selection button and select the objWall object.

29. Use the left mouse button to place the wall around the boundary of the room. If you make a mistake use the right-mouse button to remove the object from the Stage.

30. Click the object selection button and select the objClown object and place one instance in the middle of the room.

31. Save the file then press the Run Game button to play and test the game.


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LESSON 2 – THE MAZE GAME You are going to create a maze game that involves using your keyboard to move your player around a number of rooms.

Resource Files

The files needed for this tutorial are located in the Lecture Resources/Resources 3 directory in the Game Maker folder that was copied earlier.

SPRITES – BASIC WALL, PERSON & GOAL

1. Create a new Game Maker file (File>New) then save as MAZE. Remember to save the file every few minutes.

Add the following sprites:

File Name Remove Background

wall.gif sprWall No

person.gif sprPerson Yes

goal.gif sprGoal Yes

OBJECTS – BASIC WALL, PERSON & GOAL

2. Create objects for all the sprites above (objWall, objPerson, objGoal). Make sure that the objWall object is solid.

EVENTS/ACTIONS – PLAYER MOVEMENT

3. Ensure that the objPerson object is active (i.e. double-click objPerson) then click the Add Event button and select Collision, objWall.


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4. In the Move action list select the Move Fixed action. Click the middle directional button (stop) then click OK. In other words, when the player hits a wall it will stop moving. Therefore, it is not important what value the speed is.

5. Click the Add Event button and select Keyboard, <Left>.

6. In the Control action list select the Check Grid action. Type the value 32 into both the snap hor and snap vert box. This action will make sure that the player doesn't get stuck anywhere in the maze if the sprite isn't aligned properly.

7. In the Move action list select the Move Fixed action. Click the left button and set the speed to 4 then click OK.

8. Using the table below to add the remaining Events and Actions for the objPerson object:

Event Action List Action Settings

Keyboard <right>

Control Check Grid

snap hor: 32; snap vert: 32

Move Move Fixed

Direction - Right button; Speed - 4

Keyboard <down>

Control Check Grid


Move Move Fixed

Direction - Down button; Speed: 4

Keyboard <up>

Control Check Grid


Move Move Fixed

Direction: Up button; Speed: 4

Keyboard <no key >

Control Check Grid


Move Move Fixed

Direction - Stop button (middle); Speed: 4


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9. The events/actions for the objPerson object will allow the user to use the arrow keys to move the player up, down, left and right. The <no key> event is included so that when the user releases any of these keys the player will stop moving.

10. Open the objGoal object and add the following events/actions:


Collision objPerson

Main1 If next room exists

-

Main1 Go to next room

Transition (optional)

Control Else

-

Main 2 Restart game

-

11. The events/actions for the objGoal object will allow the player to move to the next room (if it exists) once it collides with objPerson object.

ROOMS – MAZE 1

12. Add a new room (right-click on Rooms folder, Add Room)

13. Click the settings tab and change the room size to 480 x 480, caption to Simple Maze and the snap x and snap y values to 32.

14. Click the objects tab then select the appropriate object to create the following room using the objWall, objGoal and objPerson objects.

15. Save the game and test.


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LESSON 4 – MAZE GAME PART 2 This is a continuation of the maze game created in the last tutorial. Open the maze file from lesson 3. In this lesson, you will create an additional room in which you will need to collect diamonds before you can proceed to the next level. You will adjust the walls of the room using different sprites so that it looks a little more realistic.


SPRITES – DIAMONDS & 3-D WALLS 1. Add the following sprites:


wall_corner.gif wall_corner No

wall_horizontal.gif wall_horizontal No

wall_vertical.gif wall_vertical No

diamond.gif sprDiamond Yes

2. You will also need to create a sprite manually. Right-click the Sprites folder and select Add Sprite.

3. Click the Edit Sprite button then click the File>New to create a new sprite. Set the width and height to 32 then click OK. Double-click the transparent sprite that should now be visible on your screen. This will take you into the Image Editor window.

4. Using the Fill Bucket select a red colour from the palette then click on the image.


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5. Click the close and save button twice then name the sprite sprDoor and uncheck the Remove Background box.

SOUNDS – MUSIC & SOUND FX 6. Add the following sounds:

File Name

background_music sndMusic

diamond sndDiamond

door sndDoor

goal sndGoal

BACKGROUND – ROOM & SPLASH BACKGROUND 7. Right-click the Backgrounds folder and select Add Background.

8. Click on the Load Background button and select the background2.bmp file, type bkgd_main in the name box then click OK.

9. Create a Splash Page image background similar to the example below using Fireworks or Photoshop. The image size should be 550 x 500 pixels. When you have finished, save the image as background_start (the format can be either a gif, jpeg or png file).

10. Right-click the Backgrounds folder and select Add Background.

11. Click on the Load Background button and select the start_background file. Type background_start in the name box then click OK.


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FONTS – SCORE FONT 12. Right-click the Fonts folder and select Add Font. Modify the settings as shown below:

OBJECTS – DIAMONDS & 3-D WALLS 13. Create objects for each of the sprites created earlier using the names objCor, objHor, objVer, objDiamond and objDoor. Make all wall objects solid. Use the image as a guide to replace the old wall with the new wall objects…


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14. Set the Parent property to objWall as shown below. Because we want all the walls to behave like the objWall object that was created in the last lesson, setting the parent property will save time as we don't have to create a collision event for each wall type. Make sure that the other wall types have the objWall as the parent.

15. The objDiamond object is going to be used to accumulate points in the maze. Using the table below create the following events/actions for the objDiamond object:


collision, objPerson

Score Set the score

new score: 10; relative

Main1 Play sound

sound: sndDiamond; loop: false

Main1 Destroy instance

applies to: self

Events/Actions Summary The sequence of events and actions will result in a score of 10 being added each time a diamond is collected. The sndDiamond sound will then be played followed by the removal of the diamond from the screen.


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16. Open the objGoal object. It should still have a list of actions that you added in the previous lesson. Using the table below add the following actions to the collision with objPerson event:



Score

new score: 100 relative

Main1

sound: sndGoal, loop: false

Main2

milliseconds: 1000

Main1

Control

Main1

Transition: fade out and in

Control

Control

Main2

Congratulations!

Score

new score: 500 relative

Score

Main2

Control

The final list of actions should look like the diagram below...


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Events/Actions Summary The sequence of events and actions will result in a score of 100 being added followed by the sndGoal sound being played and a pause of 1 second. The game will then check if another room exists. If the room exists then the game will proceed to that room. Otherwise, a congratulations message will appear, a score of 500 will be added, the highscore table will be shown followed by the game restarting. Note the use of the start and end block. The start and end block actions must be used each time an If action (e.g. If the number of instances is a value) is followed by two or more other actions (e.g. Play sound and Destroy instance actions).

17. Using the table below add the following events/actions for the objDoor object:



Control If the number of instances is a value

object: objDiamond; number: 0; operation: Equal to

Control Start of block

Main1 Play sound

sound: sndDoor; loop: false

Main1 Destroy instance

applies to: self

Control End of block

Events/Actions Summary The sequence of events and actions will result in the objDoor object being used to block the objGoal object in the maze. The door will open (i.e. it will disappear) and the sndDoor sound played after all the diamonds have been collected by the player, i.e. when the number of diamonds is equal to 0.

CONTROLLERS Controllers are objects that perform actions based on events but are not actually seen by the player and therefore do not require any sprites to be created. The maze game requires two controllers: the first controller will be used at the start of the game (to reset the score amongst other things) while the second one will be used in every room (e.g. to keep track of the score, etc.).

18. Right-click the Objects folder and select Insert Object. Type controller_start in the Name box and uncheck the Visible box.


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19. Using the table below add the following events/actions for the controller_start object:


Create

Score

Main1

Score

new score: 0

show score: don't show; show lives: don't show

new lives: 3

sound: sndMusic; loop: true

Keypress <any key> Main1

transition: fade out and in

Events/Actions Summary The sequence of events and actions will result in the score being reset to 0, background music being played and the scores being hidden. When a key is pressed the game will move to the next room.

20. Right-click the Objects folder and select Insert Object. Type controller_main in the Name box and uncheck the Visible box.Using the table below add the following events/actions for the controller_main object:


Draw

Draw

Draw

Score

font: score_font

color: red

x: 0, y: 0, caption: Score; Relative

text: Lives; x: 90; y: 0; relative

x: 150; y: 0; sprite: sprHeart

Events/Actions Summary The sequence of events and actions will result in the controller being used to set the font colour and position of the score.

ROOMS – SPLASH PAGE 21. Add a new room (right-click on Rooms folder, Add Room)

22. Click the settings tab and change the room size to 480 x 512, caption to A-Mazing! , the snap x and snap y values to 32 and room_start in the Name box.

23. Click the background tab then click the add button and select the background_start background.


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24. Click the objects tab then select the controller_start object and place anywhere in the room. The object appears as the following symbol in the room.

25. Open room1 and modify the room size to a height of 512. Place the controller_main object in the bottom left corner.

26. Add a new room (right-click on Rooms folder, Add Room) to create room2.

27. Click the settings tab and change the room size to 480 x 512, caption to Collect all the diamonds! , the snap x and snap y values to 32 and type room2 in the Name box. Place the controller_main object in the bottom left corner as well as the other objects so that it looks like the example below.


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28. Re-order the rooms by dragging the room up or down so that they are in the following order: room_start, room1, room2.

29. Save the game and test. If you are finding that the player gets stuck when it hits the wall, you will need to open the each of the sprites and uncheck the Precise Collision Checking option.


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LESSON 5 – MAZE GAME PART 3 This is a continuation of the maze game created in the last tutorial. Open the maze file from lesson 4. In this lesson, you will add the extra challenge of trying to avoid monsters in the maze. You will also use bombs to explode walls...


SPRITES – MONSTERS, BOMBS & BLOCKS 1. Add the following sprites:


monster1_nice.gif sprMonsterlr Yes

monster2_nice.gif sprMonsterud Yes

monster3_nice.gif sprMonsterall Yes

person.gif sprLives Yes

bomb.gif sprBomb Yes

trigger.gif sprTrigger Yes

explosion.gif sprExplosion Yes

block.gif sprBlock Yes

Open the sprMonsterlr to view the image. Click on the next subimage button . You should notice that the sprite is made up of a number of different images (similar to an animated gif). We will take advantage of this a little later in the tutorial as we will be able to display the relevant view of the monster sub-image depending on which direction it is going. Look at the other sprites to see their sub-images...

2. You will also need to create a new sprite manually. Right-click the Sprites folder and select Add Sprite.

3. Click the Edit Sprite button then select the File menu and New. Enter 32 for both the Width and Height values then click OK.


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4. Double click on the blank sprite. This will take you into the Image Editor window. Using the Fill

Bucket select a green colour then click on the image.

5. Click the close and save button twice then name the sprite sprHole and uncheck the Remove Background button. You should now have the following sprites:

SOUNDS – OTHER SOUND FX 6. Add the following sounds:

File Name

dead.wav sndDead

explode.wav sndExplode

hole.wav sndHole

push.wav sndPush

You should now have the following sounds. Note: the names might be slightly different…


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OBJECTS – MONSTERS, BOMBS & BLOCKS 7. Create objects for the new sprites from the previous step. Ensure you name the various objects using the names example below.

Sprite Object

sprMonsterlr objMonsterlr

sprMonsterud objMonsterud

sprMonsterall objMonsterall

sprLives objLives

sprBomb objBomb

sprTrigger objTrigger

sprExplosion objExplode

sprBlock objBlock

sprHole objHole

Make sure that objBlock and objHole are set to solid.

You should now have the following objects (the names might be slightly different):


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MONSTER COLLISIONS 8. The objPerson object needs to be modified to take into consideration its collision with the newly created monsters. Using the table below add the events/actions for the objPerson object. Hint: Once you create the actions for the collision with monster_lr, you can duplicate the event (right-click the event>Duplicate Event) and change the collision to the appropriate monster.

Collision with objMonsterlr Event Action List Action Settings

collision, objMonsterlr

Main1

sound: sndDead, loop: false

Main2

milliseconds: 1000, redraw: true

Score

lives: -1, relative

Main1

transition: fade out and in

The actions applied to the collision with objMonsterlr will be exactly the same for when the player collides with the other monsters. Rather than repeating the above steps, you will duplicate the actions and events instead…

9. Right click the collision with objMonsterlr event and select Duplicate Event. Select Collision then click objMonsterud.

10. Right click the collision with objMonsterlr event and select Duplicate Event. Select Collision then click objMonsterall.


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Events/Actions Summary The sequence of events and actions will result in the sndDead being played, a pause of 1 second, the loss of one player life and the restart of the room when the player collides with any of the monsters.

THE BLOCK 9. (i) Using the table below add the following events/actions for the objBlock object:



Control

x: 8*other.hspeed, y: 8*other.vspeed, relative

objects: All

Control

Main1

sound: sndPush, loop: false

Move

x: 8*other.hspeed y: 8*other.vspeed, relative

Control

Control

Control

Control

object: objHole, x: 8*other.hspeed,

y: 8*other.vspeed, relative

Move

x: 8*other.hspeed, y: 8*other.vspeed, relative

Control

(ii) Add the following event to the objPerson object:

collision objBlock Control

comment: do nothing

Events/Actions Summary (i) The sequence of events and actions that are applied to the objBlock object will result in the player being able to move the objBlock around the room. If the objHole object is standing in the way, the objBlock object can be used to remove the obstruction. (ii) The purpose of the objPerson collision with objBlock event (although appearing to do nothing) is to allow the player to make contact with the block so that they can move the block.


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MONSTER MOVEMENT 10. Using the table below add the following additional events/actions to the monster_lr object:


create

Control


Move

direction: left, right, Speed: 32/6

step, end step

Control

variable: hspeed, value: 0; operation: smaller than

Main1

sprite: sprMonster1, subimage: 3, speed: 0

Control

Main1


collision, objWall

Control


Move

Events/Actions Summary Create event - This will start the monster moving in either a left or right direction. Step event - This will check to see if the monster is moving left or right. When hspeed is less than zero (i.e. moving from right to left) the image needs to face left. The Change Sprite action will make sure that the monster is facing the correct way. Collision event - This will move the monster in the opposite direction when it hits a wall.

11. Using the table below add the following additional events/actions to the monster_ud object:


create

Control


Move

direction: up, down, Speed: 32/6

step, end step

Control

variable: vspeed, value: 0; operation: smaller than

Main1


Control

Main1



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collison objWall

Control


Move

12. Using the table below add the following additional events/actions to the monster_all object:


create

Control


Move

direction: up, down, left, right, speed: 32/6

step, step

Control

Control

Move

snap hor: 32 snap ver: 32

sides: 8

direction: up, down, left, right, speed: 32/6

step, end step

Control

variable: hspeed, value: 0, operation: smaller than

Control

variable: image_index, value: 3

Control

variable: hspeed, value: 0, operation: larger than

Control


Control

variable: vspeed, value: 0, operation: smaller than

Control


Control

variable: vspeed, value: 0, operation: larger than

Control


collision, objWall

Move

direction: direction + 90 speed: 32/6

Control

x: hspeed, y: vspeed, relative

Control

-

Move

direction: direction + 180 speed: 32/6

Control

x: hspeed, y: vspeed, relative

Control

-

Move

direction: direction -90 speed: 32/6


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Events/Actions Summary The sequence of events and actions for the first two monsters will result in the monsters moving horizontally for monster1 and vertically for monster2. When objMonsterlr hits either wall it will bounce in the other horizontal direction. The sprite will also change so that the monster is facing in the correct direction, hence the use of the image_index property. This is similar for objMonsterud except that it will move vertically and bounce in the other direction when it hits the wall. objMonsterall is a little more complicated in that its movements can be one of four possibilities (up, down, left, right). The use of the chance action is to provide some unpredictability to its movement so that the monster will suddenly change direction.

THE HOLE 13. Using the table below add the following events/actions for the objHole object:


collision, objBlock

Main1

sound: sndHole, loop: false

Main1

applies to: self

Main1

applies to: other

Events/Actions Summary The sequence of events/actions ensures that when the objBlock object makes contact (collides) with the objHole object, both objects are removed. The sndHole effect is also played.

THE BOMB, TRIGGER & EXPLOSION 14. Using the table below add the following events/actions for the objTrigger object:



Main1

sound: sndExplode

Main1

object: objBomb, change into: objExplode, perform events: yes

Main1

applies to: self


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15. Using the table below add the following events/actions for the objExplode object:


create

Move

x: -200, y: -200, relative

Main1

x: 200-16, y: 200-16, relative

Main1

x: 200-16, y: 200+16, relative

Main1

x: 200-16, y: 200+48, relative

Main1

x: 200+16, y: 200-16, relative

Main1

x: 200+16, y: 200+16, relative

Main1

x: 200+16, y: 200+48, relative

Main1

x: 200+48, y: 200-16, relative

Main1

x: 200+48, y: 200+16, relative

Main1

x: 200+48, y: 200+48, relative

Move

x: 200, y: 200, relative

other, animation end Main1

applies to: self

Note: The x and y values for the Destroy instances at a position action requires a little trial and error so that the relevant parts of the room are 'destroyed'.

Events/Actions Summary The sequence of events and actions in the objTrigger object will result in the objBomb object being transformed into the objExplode object and the bomb being removed. The objExplode sequence of events and actions will result in the explosion causing any objects in the vicinity to be destroyed. The animation end event is to ensure that the animated explosion sequence doesn't repeat forever.


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PLAYER SPRITE UPDATE 1. Replace sprPerson and sprLives with person_nice.gif. Add the following sprite:

File Name Transparent

life.gif sprHeart Yes

SOUNDS - LIFE 2. Add the following sound:

File Name

life.wav sndLife

OBJECTS – PLAYER & LIFE 3. The objPerson object uses an animated sprite (GIF) that contains a number of different images of the player going up, down, left and right. The images below illustrate...

Player left Player right Player down Player up

To take this into account, we will need to create additional events and actions. Using the table below, add the new events and actions to the objPerson object:


create Main1

sprite: sprPerson, subimage: 0

keyboard <left> Main1


Control


Move

Direction: left, Speed: 4

keyboard <right> Main1


Control


Move

Direction: right, Speed: 4


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keyboard <up> Main1


Control


Move

Direction: up, Speed: 4

keyboard <down> Main1


Control


Move

Direction: down, Speed: 4

4. Using the table below add the following additional events/actions to the objLife object:


collision objPerson

Score

Main1

Main1

sound: sndLife, loop: False

new lives: +1, relative

applies to: self

Events/Actions Summary The sequence of events and actions in the keyboard events for the objPerson object will result in the relevant subimage displaying when the player is facing left, right, up or down. The objLife collision with the player will result in an extra life being added to the game.

ROOMS – ADDITIONAL 16. Add four more rooms using the settings listed. Ensure that all rooms have the main_controller placed in the bottom left-corner as well.

Hint: To save yourself time you can duplicate the rooms. Right-click on the room then select Duplicate…


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Name: room3, Caption: Watch out for the monsters!, Snap x: 32, Snap y: 32, Width: 480, Height: 512

Name: room3, Caption: Hidden flag!, Snap x: 32, Snap y: 32, Width: 480, Height: 512

Name: room3, Caption: Use the rocks!, Snap x: 32,

Snap y: 32, Width: 480, Height: 512 Name: room3, Caption: Bombs away!, Snap x: 32, Snap y:

32, Width: 480, Height: 512

17. Ensure that the rooms are in the following order: room_start, room1, room2, room3, room4, room5, room6.

18. Save the game and test.


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LESSON 6 – COMPLETING THE MAZE GAME This is a continuation of the maze game created in the last tutorial. Open the maze file from lesson 5. In this lesson, you will create one more room, modify the game controller and add a user’s guide...


SPRITES – ONE RING TO RULE THEM ALL

1. Add the following sprite:


ring.gif sprRing Yes

2. Create an object using the sprRing sprite and name it objRing.

3. Add the following additional events/actions to the objRing object:


Collision, objPerson

Main1

Applies to: self

Score

New score: 250; relative

4. Add the following room to the game using the same settings as the other rooms. Make up your own caption:


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5. Using the table below add the following additional events/actions to the main_controller:


keyboard, letters, N

Main1

Main1

Transition fade out and in

keyboard, letters, P Main1

Transition optional

keyboard, letters, R Main1

Transition optional

other, no more lives

Score

Colours are optional -

Main2

draw

Score

Font: score_font, Align: left

Draw

Colour: yellow

Score

x: 300, y: 4, caption: Score, relative

Draw

text: Lives, x: 8, y: 4, relative

Score

x: 70, y: 4, image: sprLives, relative

Events/Actions Summary The sequence of events and actions in the keyboard events for the main_controller object will give the user some basic cheats when playing the game. If they press the letter N it will go to the next room (if it exists). When the P letter is pressed it will go to the previous room and R will restart the current room. The draw event will display the score and lives.

GAME INFORMATION 6. The game information section in Game Maker can be used to create a basic user's help guide. Double-click the Game Information ( ) button then type the following:


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7. Further customisation of the game can be made in the game settings dialog. Double-click the Global Settings button and modify the Other tab as shown below:

8. Save and test the game.

game maker: maze tutorialyear9gamemaker.weebly.com/uploads/5/0/1/9/50198163/game... ·...

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