The Ring programming language version 1.9 book - Part 60 of 210
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This document provides documentation for Ring version 1.9 and includes code samples for using the Ring game engine. It shows how to create a game object, add a map and images, handle mouse and keyboard events, create objects that can be drawn and moved, and provides a full sample game code for a "Stars Fighter" space shooter game.
![Ring Documentation, Release 1.9
[0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0]
]
aImages = ["images/fbwall.png",
"images/fbwallup.png",
"images/fbwalldown.png"]
state = func oGame,oSelf {
oSelf {
x -= 3
if x < - 2100 x = 0 ok
}
}
}
} # Start the Events Loop
Screen Shot:
59.24. Using the Game Engine - Map 559](https://image.slidesharecdn.com/591ring-181111125627/85/The-Ring-programming-language-version-1-9-book-Part-60-of-210-1-320.jpg)
![Ring Documentation, Release 1.9
59.25 Using the Game Engine - Map Events
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"
Map {
blockwidth = 80
blockheight = 80
aMap = [
[0,0,0,0,0,0,0,0,0,1,0,0,0,3,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0],
[0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0],
[0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,2,0,0,0,1,0,0,0],
[0,0,0,0,0,0,0,0,0,1,0,0,0,2,0,0,0,3,0,0,0,1,0,0,0,1,0,0,0],
[0,0,0,0,0,0,0,0,0,3,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,3,0,0,0],
[0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0]
]
aImages = ["images/fbwall.png",
"images/fbwallup.png",
"images/fbwalldown.png"]
state = func oGame,oSelf {
oSelf {
x -= 3
if x < - 2100 x = 0 ok
}
}
mouse = func ogame,oself,nType,aMouseList {
if nType = GE_MOUSE_UP
oSelf {
mX = aMouseList[GE_MOUSE_X]
mY = aMouseList[GE_MOUSE_Y]
nValue = GetValue(mX,mY)
nRow = GetRow(mX,mY)
nCol = GetCol(mX,mY)
Switch nValue
On 1 aMap[nRow][nCol] = 0
On 2 aMap[nRow][nCol] = 0
On 3 aMap[nRow][nCol] = 0
On 0 aMap[nRow][nCol] = 1
Off
}
ok
}
}
} # Start the Events Loop
59.25. Using the Game Engine - Map Events 560](https://image.slidesharecdn.com/591ring-181111125627/85/The-Ring-programming-language-version-1-9-book-Part-60-of-210-2-320.jpg)
![Ring Documentation, Release 1.9
state = func ogame,oself {
oself {
if x < -350
direction = ge_direction_inc
point = 370
but x = 0 and direction = ge_direction_inc
direction = ge_direction_dec
point = -370
ok
}
}
}
sprite
{
file = "images/player.png"
transparent = true
type = ge_type_player
x = 400 y =400 width=100 height=100
animate=false move=true Scaled=true
mouse = func ogame,oself,nType,aMouseList {
if not ( aMouseList[GE_MOUSE_X] >= oSelf.x and
aMouseList[GE_MOUSE_X] <= oSelf.x+oSelf.width and
aMouseList[GE_MOUSE_Y] >= oself.y and
aMouseList[GE_MOUSE_Y] <= oSelf.y+oSelf.height )
if nType = GE_MOUSE_DOWN
if aMouseList[1] < oSelf.X # left
oSelf.X -= 100
else
oSelf.X += 100
ok
if aMouseList[2] < oSelf.Y # up
oSelf.Y -= 100
else
oSelf.Y += 100
ok
ok
else
if nType = GE_MOUSE_UP
cFunc = oself.keypress
call cFunc(oGame,oSelf,Key_Space)
ok
ok
}
keypress = func oGame,oself,nkey {
if nkey = key_space
ogame {
sprite {
type = ge_type_fire
file = "images/rocket.png"
transparent = true
x = oself.x + 30
y = oself.y - 30
width = 30
height = 30
point = -30
59.27. Stars Fighter Game 567](https://image.slidesharecdn.com/591ring-181111125627/85/The-Ring-programming-language-version-1-9-book-Part-60-of-210-9-320.jpg)
The Ring programming language version 1.9 book - Part 60 of 210
- 1. Ring Documentation, Release 1.9 [0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0], [0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0] ] aImages = ["images/fbwall.png", "images/fbwallup.png", "images/fbwalldown.png"] state = func oGame,oSelf { oSelf { x -= 3 if x < - 2100 x = 0 ok } } } } # Start the Events Loop Screen Shot: 59.24. Using the Game Engine - Map 559
- 2. Ring Documentation, Release 1.9 59.25 Using the Game Engine - Map Events 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" Map { blockwidth = 80 blockheight = 80 aMap = [ [0,0,0,0,0,0,0,0,0,1,0,0,0,3,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0], [0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0], [0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,2,0,0,0,1,0,0,0], [0,0,0,0,0,0,0,0,0,1,0,0,0,2,0,0,0,3,0,0,0,1,0,0,0,1,0,0,0], [0,0,0,0,0,0,0,0,0,3,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,3,0,0,0], [0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0], [0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0], [0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0] ] aImages = ["images/fbwall.png", "images/fbwallup.png", "images/fbwalldown.png"] state = func oGame,oSelf { oSelf { x -= 3 if x < - 2100 x = 0 ok } } mouse = func ogame,oself,nType,aMouseList { if nType = GE_MOUSE_UP oSelf { mX = aMouseList[GE_MOUSE_X] mY = aMouseList[GE_MOUSE_Y] nValue = GetValue(mX,mY) nRow = GetRow(mX,mY) nCol = GetCol(mX,mY) Switch nValue On 1 aMap[nRow][nCol] = 0 On 2 aMap[nRow][nCol] = 0 On 3 aMap[nRow][nCol] = 0 On 0 aMap[nRow][nCol] = 1 Off } ok } } } # Start the Events Loop 59.25. Using the Game Engine - Map Events 560
- 3. Ring Documentation, Release 1.9 Screen Shot: 59.26 Using the Game Engine - Object and Drawing We can use the Object keyword (defined by the game engine) to create objects from the GameObject class. Example: 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" Object { x = 0 y=300 width = 200 height=200 draw = func oGame,oSelf { oSelf { for t = 1 to 210 gl_draw_circle(x,y,t, gl_map_rgb(t*random(255), t*2,t*3),1) 59.26. Using the Game Engine - Object and Drawing 561
- 4. Ring Documentation, Release 1.9 next } } state = func oGame,oSelf { oSelf { if x <= 800 x+= 3 else x=0 ok } } 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 Screen Shot: 59.26. Using the Game Engine - Object and Drawing 562
- 5. Ring Documentation, Release 1.9 Example: 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" Object { x = 400 y=300 width = 200 height=200 draw = func oGame,oSelf { oSelf { for t = 1 to 210 gl_draw_rectangle(x+t,y+t, x+t*2,y+t*2, gl_map_rgb(t*random(255), t*2,t*3),1) gl_draw_rectangle(x+t*2,y+t*2, x-t*2,y-t*2, gl_map_rgb(t*random(255), t*2,t*3),1) next } } 59.26. Using the Game Engine - Object and Drawing 563
- 6. Ring Documentation, Release 1.9 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 Screen Shot: 59.27 Stars Fighter Game The Stars Fighter source code 59.27. Stars Fighter Game 564
- 7. Ring Documentation, Release 1.9 # The Ring Standard Library # Game Engine for 2D Games # 2016, Mahmoud Fayed <msfclipper@yahoo.com> oGameState = NULL load "gameengine.ring" func main oGame = New Game while true oGameState = new GameState oGame { title = "Stars Fighter!" sprite { file = "images/menu1.jpg" x = 0 y=0 width=800 height = 600 scaled = true animate = false keypress = func ogame,oself,nKey { if nkey = key_esc or nKey = GE_AC_BACK ogame.shutdown() but nKey = key_space oGameState.startplay=true ogame.shutdown=true ok } mouse = func ogame,oself,nType,aMouseList { if nType = GE_MOUSE_UP oGameState.startplay=true ogame.shutdown=true ok } } text { animate = false size = 35 file = "fonts/pirulen.ttf" text = "Stars Fighter" x = 10 y=50 } text { animate = false size = 25 file = "fonts/pirulen.ttf" text = "Version 1.0" x = 80 y=100 } text { animate = false size = 16 file = "fonts/pirulen.ttf" text = "(C) 2016, Mahmoud Fayed" x = 45 y=140 } 59.27. Stars Fighter Game 565
- 8. Ring Documentation, Release 1.9 text { animate = false size = 25 file = "fonts/pirulen.ttf" text = "Press Space to start" x = 190 y=470 } text { animate = false size = 20 file = "fonts/pirulen.ttf" text = "Press Esc to Exit" x = 260 y=510 } Sound { file = "sound/music1.wav" } } if oGameState.startplay oGame.refresh() playstart(oGame) oGame.refresh() ok end func playstart oGame oSound = New Sound { file = "sound/music2.wav" } while true play(oGame) if ogame.shutdown = true and oGameState.value = 0 exit ok ogame.refresh() end oSound.Delete() func play oGame oGame { FPS = 60 FixedFPS = 120 title = "Stars Fighter!" sprite { file = "images/stars.jpg" x = 0 y = 0 point = -370 direction = ge_direction_dec type = ge_type_background 59.27. Stars Fighter Game 566
- 9. Ring Documentation, Release 1.9 state = func ogame,oself { oself { if x < -350 direction = ge_direction_inc point = 370 but x = 0 and direction = ge_direction_inc direction = ge_direction_dec point = -370 ok } } } sprite { file = "images/player.png" transparent = true type = ge_type_player x = 400 y =400 width=100 height=100 animate=false move=true Scaled=true mouse = func ogame,oself,nType,aMouseList { if not ( aMouseList[GE_MOUSE_X] >= oSelf.x and aMouseList[GE_MOUSE_X] <= oSelf.x+oSelf.width and aMouseList[GE_MOUSE_Y] >= oself.y and aMouseList[GE_MOUSE_Y] <= oSelf.y+oSelf.height ) if nType = GE_MOUSE_DOWN if aMouseList[1] < oSelf.X # left oSelf.X -= 100 else oSelf.X += 100 ok if aMouseList[2] < oSelf.Y # up oSelf.Y -= 100 else oSelf.Y += 100 ok ok else if nType = GE_MOUSE_UP cFunc = oself.keypress call cFunc(oGame,oSelf,Key_Space) ok ok } keypress = func oGame,oself,nkey { if nkey = key_space ogame { sprite { type = ge_type_fire file = "images/rocket.png" transparent = true x = oself.x + 30 y = oself.y - 30 width = 30 height = 30 point = -30 59.27. Stars Fighter Game 567
- 10. Ring Documentation, Release 1.9 nstep = 20 direction = ge_direction_decvertical state = func oGame,oSelf { for x in oGame.aObjects if x.type = ge_type_enemy if oself.x >= x.x and oself.y >= x.y and oself.x <= x.x + x.width and oself.y <= x.y + x.height showfire(oGame,x.x+40,x.y+40) ogame.remove(x.nindex) oGameState.score+=10 oGameState.enemies-- checkwin(oGame) exit ok ok next } } } but nkey = key_esc or nKey = GE_AC_BACK ogame.shutdown() ok } state = func oGame,oSelf { oself { if x < 0 x = 0 ok if y < 0 y = 0 ok if x > ogame.screen_w-width x= ogame.screen_w - width ok if y > ogame.screen_h-height y=ogame.screen_h-height ok } } } for g = 1 to oGameState.enemies sprite { type = ge_type_enemy file = "images/enemy.png" transparent = true x = g*random(50) y =g width=100 height=100 animate=true Scaled=true direction = ge_direction_random state = func oGame,oSelf { oself { if x < 0 x = 0 ok if y < 0 y = 0 ok if x > ogame.screen_w-width x= ogame.screen_w - width ok if y > ogame.screen_h-height y=ogame.screen_h-height ok } if random(100) = 1 ogame { sprite { type = ge_type_fire file = "images/rocket2.png" transparent = true x = oself.x + 30 y = oself.y + oself.height+ 30 width = 30 height = 30 59.27. Stars Fighter Game 568