The Ring programming language version 1.10 book - Part 60 of 212

1. Ring Documentation, Release 1.10
60.13 Using the Game Engine - Creating the Game Window
Load "gameengine.ring" # Give Control to the Game Engine
func main # Called by the Game Engine
oGame = New Game # Create the Game Object
{
title = "My First Game"
} # Start the Events Loop
Note: if you want to define global variables, this must be before load “gameengine.ring” because this instruction will
give the control to the game engine.
Screen Shot:
60.14 Using the Game Engine - Drawing Text
Load "gameengine.ring" # Give Control to the Game Engine
func main # Called by the Game Engine
60.13. Using the Game Engine - Creating the Game Window 558

2. Ring Documentation, Release 1.10
oGame = New Game # Create the Game Object
{
title = "My First Game"
text {
x = 10 y=50
animate = false
size = 20
file = "fonts/pirulen.ttf"
text = "game development using ring is very fun!"
color = rgb(0,0,0)
}
} # Start the Events Loop
Screen Shot:
60.15 Using the Game Engine - Moving Text
Load "gameengine.ring" # Give Control to the Game Engine
func main # Called by the Game Engine
oGame = New Game # Create the Game Object
60.15. Using the Game Engine - Moving Text 559

3. Ring Documentation, Release 1.10
{
title = "My First Game"
text {
x = 10 y=50
animate = false
size = 20
file = "fonts/pirulen.ttf"
text = "game development using ring is very fun!"
color = rgb(0,0,0) # Color = black
}
text {
x = 10 y=150
# Animation Part =====================================
animate = true # Use Animation
direction = GE_DIRECTION_INCVERTICAL # Increase y
point = 400 # Continue until y=400
nStep = 3 # Each time y+= 3
#=====================================================
size = 20
file = "fonts/pirulen.ttf"
text = "welcome to the real world!"
color = rgb(0,0,255) # Color = Blue
}
} # Start the Events Loop
Screen Shot:
60.15. Using the Game Engine - Moving Text 560

4. Ring Documentation, Release 1.10
60.16 Using the Game Engine - Playing Sound
Load "gameengine.ring" # Give Control to the Game Engine
func main # Called by the Game Engine
oGame = New Game # Create the Game Object
{
title = "My First Game"
text {
x = 10 y=50
animate = false
size = 20
file = "fonts/pirulen.ttf"
text = "game development using ring is very fun!"
color = rgb(0,0,0) # Color = black
}
text {
x = 10 y=150
# Animation Part ======================================
animate = true # Use Animation
direction = GE_DIRECTION_INCVERTICAL # Increase y
60.16. Using the Game Engine - Playing Sound 561

5. Ring Documentation, Release 1.10
point = 400 # Continue until y=400
nStep = 3 # Each time y+= 3
#======================================================
size = 20
file = "fonts/pirulen.ttf"
text = "welcome to the real world!"
color = rgb(0,0,255) # Color = Blue
}
Sound { # Play Sound
file = "sound/music1.wav" # Sound File Name
}
} # Start the Events Loop
60.17 Using the Game Engine - Animation
Load "gameengine.ring" # Give Control to the Game Engine
func main # Called by the Game Engine
oGame = New Game # Create the Game Object
{
title = "My First Game"
animate {
file = "images/fire.png"
x = 100
y = 200
framewidth = 40
height = 42
nStep = 3 # Used for delay
transparent = true
state = func oGame,oSelf { # Called by engine each frame
oSelf {
nStep--
if nStep = 0
nStep = 3
if frame < 13 # we have 13 frames in animation
frame++ # move to next frame
else
oGame.remove(oself.nIndex) # remove object
ok
ok
}
}
}
} # Start the Events Loop
60.17. Using the Game Engine - Animation 562

6. Ring Documentation, Release 1.10
60.18 Using the Game Engine - Animation and Functions
Load "gameengine.ring" # Give Control to the Game Engine
func main # Called by the Game Engine
oGame = New Game # Create the Game Object
{
title = "My First Game"
for x = 70 to 700 step 50
for y = 70 to 500 step 50
showfire(oGame,x,y)
next
next
} # Start the Events Loop
func showfire oGame,nX,nY
oGame {
animate {
file = "images/fire.png"
x = nX
60.18. Using the Game Engine - Animation and Functions 563

7. Ring Documentation, Release 1.10
y = nY
framewidth = 40
height = 42
nStep = 3 # Used for delay
transparent = true
state = func oGame,oSelf { # Called by engine each frame
oSelf {
nStep--
if nStep = 0
nStep = 3
if frame < 13 # we have 13 frames in animation
frame++ # move to next frame
else
frame=1
ok
ok
}
}
}
}
60.18. Using the Game Engine - Animation and Functions 564

8. Ring Documentation, Release 1.10
60.19 Using the Game Engine - Sprite - Automatic Movement using
Keyboard
Load "gameengine.ring" # Give control to the game engine
func main # Called by the Game Engine
oGame = New Game # Create the Game Object
{
title = "My First Game"
sprite
{
type = GE_TYPE_PLAYER # Just for our usage
x=400 y=400 width=100 height=100
file = "images/player.png"
transparent = true
Animate=false
Move=true # we can move it using keyboard arrows
Scaled=true
}
} # Start the Events Loop
60.19. Using the Game Engine - Sprite - Automatic Movement using Keyboard 565

9. Ring Documentation, Release 1.10
60.20 Using the Game Engine - Sprite - Keypress event
Load "gameengine.ring" # Give control to the game engine
func main # Called by the Game Engine
oGame = New Game # Create the Game Object
{
title = "My First Game"
sprite
{
type = GE_TYPE_PLAYER # Just for our usage
x=400 y=400 width=100 height=100
file = "images/player.png"
transparent = true
Animate=false
Move=false # Custom Movement
Scaled=true
keypress = func oGame,oSelf,nKey {
oSelf {
Switch nKey
on KEY_LEFT
x -= 10
on KEY_RIGHT
x += 10
on KEY_UP
y -= 10
on KEY_DOWN
y += 10
off
}
}
}
} # Start the Events Loop
60.21 Using the Game Engine - Sprite - Mouse event
Load "gameengine.ring" # Give control to the game engine
func main # Called by the Game Engine
oGame = New Game # Create the Game Object
{
title = "My First Game"
sprite
{
type = GE_TYPE_PLAYER # Just for our usage
x=400 y=400 width=100 height=100
file = "images/player.png"
transparent = true
Animate=false
Move=false # Custom Movement
Scaled=true
keypress = func oGame,oSelf,nKey {
oSelf {
60.20. Using the Game Engine - Sprite - Keypress event 566

10. Ring Documentation, Release 1.10
Switch nKey
on KEY_LEFT
x -= 10
on KEY_RIGHT
x += 10
on KEY_UP
y -= 10
on KEY_DOWN
y += 10
off
}
}
mouse = func oGame,oSelf,nType,aMouseList {
if nType = GE_MOUSE_UP
oSelf {
x = aMouseList[GE_MOUSE_X]
y = aMouseList[GE_MOUSE_Y]
}
ok
}
}
} # Start the Events Loop
60.22 Using the Game Engine - Sprite - State event
Load "gameengine.ring" # Give control to the game engine
func main # Called by the Game Engine
oGame = New Game # Create the Game Object
{
title = "My First Game"
sprite
{
type = GE_TYPE_PLAYER # Just for our usage
x=400 y=400 width=100 height=100
file = "images/player.png"
transparent = true
Animate=false
Move=false # Custom Movement
Scaled=true
keypress = func oGame,oSelf,nKey {
oSelf {
Switch nKey
on KEY_LEFT
x -= 10
on KEY_RIGHT
x += 10
on KEY_UP
y -= 10
on KEY_DOWN
y += 10
off
}
}
mouse = func oGame,oSelf,nType,aMouseList {
60.22. Using the Game Engine - Sprite - State event 567