_TITLE "b+QB64 Asteroids M10" 'started 2018-07-13 '2020 - Oct and Nov: Special thanks to SierraKen who has been helpful with suggestions, ideas and fixes.
' Far far away in a universe where Newton's 1st Law of Motion is not obeyed... ;-))
' New Controls
' key a or left arrow = turn left
' key s or right arrow = turn right
' enter or spacebar = "hyperspace" show up somewhere else better or worse use when collision is imminent
' key k or up arrow = thrust just a burst in direction you are pointed but doesn't last
' fire! owwha, owha, owha... is now continuous
'=================================================================================================================
' 2020-10-27 remove the alternate subs and get down below 200 LOC almost there now! new shooter action font and background
' 2020-10-28 another makeover explosions and split asteroids
' 2020-10-29 fix baby rock management, break between lives
' 2020-10-29 fix left/right gun, fix explosions over many frames to eliminate pause in action, speed up 60 fps
' 2020-10-30 m3 SierraKen's idea to angle shooter with mousewheel also finish WASD options, more rocks, points system
' points:
' The higher the speed the better speed range .5 to 2.5, diff = 2 * 50 = 100 s - .5 * 50
' DELETE The lower the color the better color range 10 to 60, diff = 50 * 2 = 100 50 - (c - 10) * 2
' The smaller the size the better size range 10 to 100, diff = 90 * 1.1111 = 100 90 - (sz -10) * 1.1111
' ((speed - .5) * 50 + (90 - (r - 10)) * 1.1111) / 2 = 100 best score per hit
' 2020-10-30 increase level of difficulty, fix double lives lost, add an ending after all lives spent.
' 2020-10-31 M4 They are Here - the aliens have accepted my invitaion for war games don't get caught in their beam.
' rework ending and variable LONG suffix. Aliens on the attack 100 points before or after transformed into the Bolder of Death.
' 2020-11-01 M5 FX Moving through space, Oh yeah, more aliens!
' 2020-11-01 M6 add play again and save high game , continuous shoot
' 2020-11-01 M7 fix hits count when hit alien ship or Bolder of Death. Fix lights on aliens ship. I want to see collsions with ship.
' Ken recommends removing text in middle of screen, yeah, distracting. Makeover ship as with mouse x, y it's center. Add Splash screen.
' Show mouse in between lives so can be in screen center when press key to start next run.
' 2020-11-03 M9 watching videos on Asteroids, I found a view and description of the control panel, it is:
' 2 buttons on left and lower button in middle and 2 buttons on right level with 2 on left.
' 2 buttons on left are left and right turns they will be Keys A and S
' The middle will be spacebar for Hypespace or these days we might call it worm hole, jump to another location better or worse!
' 2 buttons on right K and L: K will be a thruster of sorts you eventually come to a stop (not what Newton would like) L is the fire button.
' So let's try that. I am impressed by hitting thruster and shooting all around as you dift in direction gun was pointed when hit thruster.
' Lighten rocks and change points, based now only on size and speed of Asteroids.
' 2020-11-04 M9 Install new update to thrust control. Thanks to SierraKen for finding out what happened to Hyperspace jump when press
' spacebar a 2nd time in a life. Oh also Boulders of Death are now more like smooth colored spheres. Ahhhh Fixed the crashing at the borders
' now fly out one side and come back in on the other! This is getting good! Adding some sound effects.
' 2020-11-05 M10 set some constants for starting game so can just change them to level of play desired.
' speed points = 50 * (rockSpeed - minRockSpeed)/rockSpeedRange > fastest rock gets 50 points
' size points = 50 * (rockSizeRange - (rockSize - minRockSize))/rockSizeRange > smallest rock gets 50 points
' points = points + 50 * ( (rockSpeed - minRockSpeed)/rockSpeedRange + (rockSizeRange - (rockSize - minRockSize))/rockSizeRange )
' Dav's comments: Add arrow keys for left right turns and up for thrust, continuous fire now! A little score board in top left corner.
' Dav I am keeping spacebar for Hyperspace but also Enter, don't need fire button now.
' Try the A for left and the right arrow for right turns.
' 2020-11-05 p is for pause
' 2020-11-06 Move it or lose it!
'================================================================================================================
' NOTE: !!!!!!!!!!!!!!! When there is a pause in action, just press enter, as in enter a new life!
'================================================================================================================
CONST xmax
= 1200, ymax
= 700, pi
= _PI, polyAngle
= _PI / 6, nRocks
= 300, nBullets
= 2000, bSpeed
= 15 CONST startRocks
= 2, minRockSpeed
= 0.7500, maxRockSpeed
= 3.2500, minRockSize
= 10, maxRockSize
= 100 CONST rockSpeedRange
= maxRockSpeed
- minRockSpeed
, rockSizeRange
= maxRockSize
- minRockSize
CONST alienSpeed
= rockSpeedRange
/ 2 + minRockSpeed
' average rock speed
ls
AS LONG ' lights offset and gray scale
speed
AS SINGLE ' just a constant now when Thrust is applied thrustAngle
AS SINGLE ' ship/gun angle at moment Thrust is pressed angle
AS SINGLE ' rotated position ship/gun now A or S keypress or hold down thrust
AS LONG ' this now tracks how many frames ship will move at speed and thrustAngle
ra
AS SINGLE ' rotation position a = a + spin heading
AS SINGLE ' heading from which dx, dy are calc with speed spin
AS SINGLE ' rotation direction and amount seed
AS LONG ' for drawing rocks with RND USING c
AS LONG ' color rgb(c, c, c) live
AS LONG ' need this to track rocks still active like bullets explodeFrame
AS LONG ' after a rock is hit by bullet, it explodes and in more than one frame
DIM SHARED rocks
AS LONG 'rocks is the minimum number of parent rocks to have on screen automatic replace when hit or out of bounds
DIM kh
AS LONG 'key hit for ship thrust k or up arrow or hyperspace jump spacebar DIM hs$
, s$
, k$
, t
, lastt
'high score, general string and times for bullets ship.speed = 3.5 'this would be a constant but ship has to declared as Ship Type first, Hyperspace jump
fnt
= _LOADFONT("ARLRDBD.ttf", 16, "MONOSPACE")fnt2
= _LOADFONT("ARLRDBD.ttf", 40, "MONOSPACE")COLOR &HFF00FFFF, &H00000000
hs$
= "High Score:" + STR$(HS
)
'a little splash screen
rocks = 7: alienN = 3
newRock i
IF i
> rocks
THEN r
(i
).live
= 0 newAlien i
i = 0
drawStars 0
i = i + 1
IF i
MOD 30 = 29 AND rocks
< nRocks
THEN rocks
= rocks
+ 1: r
(rocks
).live
= 1 drawAliens i
s$ = "*** b+QB64 Asteroids ***"
s$ = "A or arrow = Left spin"
s$ = "S or arrow = Right Spin"
s$ = "Space or Enter = Hyper jump"
s$ = "K or up arrow = Thrust"
s$ = "Escape quit, any plays"
restart:
hs$
= " High Score:" + STR$(HS
)lives = 10: alienN = 1: rocks = startRocks: ' always active rocks
points = 0: hits = 0: bullets = 0
newAlien ai
FOR i
= 1 TO nRocks
'reset rocks mainly clear baby rocks newRock (i)
IF i
> rocks
THEN r
(i
).live
= 0 ship.x = xmax / 2 'avoids explosions top left corner at start, dang still get some!
ship.y = ymax / 2
ship.angle = 0
ship.thrustAngle = 0
ship.thrust = 0
ship.live = 1
rockPoints = 0
roundPoints = 0
_KEYCLEAR 'clear all previous INKEY$ or _KEYHIT and variables so ship should always start in middle of sceen pointed east kh = 0
'draw everything then process bullets
drawStars 1
drawAliens ai
IF r
(i
).live
THEN 'make sure if we crash into a ship it is a live rock, not one sitting on side waiting to be called up drawRock i ' while drawing rocks the ship could be blown up
IF ((r
(i
).x
- ship.x
) ^ 2 + (r
(i
).y
- ship.y
) ^ 2) ^ .5 < r
(i
).r
+ 20 THEN 'rock collides with ship? CIRCLE ((ship.x
+ r
(i
).x
) / 2, (ship.y
+ r
(i
).y
) / 2), br
, _RGB32(255 - br
, 255 - 2 * br
, 0) drawRock i
drawship
ship.live = 0
FOR i
= 1 TO nRocks
'smoke up the place with rock debris fields still flying out from hit frames ago r(i).explodeFrame = r(i).explodeFrame + 1
IF r
(i
).explodeFrame
> .25 * r
(i
).r
THEN r(i).explodeFrame = 0
IF i
<= rocks
THEN newRock i
' now replace the rock explode r(i).x, r(i).y, r(i).r, r(i).explodeFrame
IF SQR((aliens
(ai
).x
- ship.x
) ^ 2 + (aliens
(ai
).y
- ship.y
) ^ 2) < 55 THEN 'aliens and ship collisde boom boom CIRCLE ((ship.x
+ aliens
(ai
).x
) / 2, (ship.y
+ aliens
(ai
).y
) / 2), br
, _RGB32(255 - br
, 255 - 2 * br
, 0) drawship
ship.live = 0
drawship
' ship controls update
'a key or left arrow = left spin
's key or right arrow = right spin
'l is Fire! JUST CONTINUOUS FIRE
fire = 0
'IF _KEYDOWN(108) THEN
IF lastt
= 0 OR t
- lastt
> .15 THEN fire
= 1:
SOUND 2088, .01: lastt
= t
'END IF
kh = 0
CASE 107, 18432 'thrust k key or up arrow ship.thrustAngle = ship.angle: ship.thrust = 120
CASE 13, 32 ' space = hyperspace jump ship.x
= (xmax
- 300) * RND + 150: ship.y
= (ymax
- 300) * RND + 150: ship.thrust
= 0
' locate ship
'relocate ship position
ship.x
= ship.x
+ ship.speed
* COS(ship.thrustAngle
) ship.y
= ship.y
+ ship.speed
* SIN(ship.thrustAngle
) ' jump borders
IF ship.x
< 0 THEN ship.x
= xmax
- ABS(ship.x
) IF ship.x
> xmax
THEN ship.x
= ship.x
- xmax
IF ship.y
< 0 THEN ship.y
= ymax
- ABS(ship.y
) IF ship.y
> ymax
THEN ship.y
= ship.y
- ymax
FOR i
= 0 TO nBullets
' handle bullets IF b
(i
).live
= 0 AND fire
= 1 THEN 'have inactive bullet to use b
(i
).x
= ship.x
+ 2 * bSpeed
* COS(ship.angle
) b
(i
).y
= ship.y
+ 2 * bSpeed
* SIN(ship.angle
) b
(i
).dx
= bSpeed
* COS(ship.angle
) b
(i
).dy
= bSpeed
* SIN(ship.angle
) b(i).live = -1
bullets = bullets + 1
fire = 0
IF b
(i
).live
THEN 'new location b(i).x = b(i).x + b(i).dx
b(i).y = b(i).y + b(i).dy
IF b
(i
).x
> 0 AND b
(i
).x
< xmax
AND b
(i
).y
> 0 AND b
(i
).y
< ymax
THEN 'in bounds draw it
'bullet hit aliens?
IF SQR((aliens
(ai
).x
- b
(i
).x
) ^ 2 + (aliens
(ai
).y
- b
(i
).y
) ^ 2) < 30 THEN CIRCLE (aliens
(ai
).x
, aliens
(ai
).y
), br
/ 3, plasma~&
(0) hits = hits + 1
roundPoints = roundPoints + 100
points = points + 100
aliens(ai).live = 0
newAlien ai
b(i).live = 0
FOR r
= 1 TO nRocks
'check for collision with rock IF SQR((r
(r
).x
- b
(i
).x
) ^ 2 + (r
(r
).y
- b
(i
).y
) ^ 2) < r
(r
).r
THEN 'its a hit! r(r).explodeFrame = 1 'linger with explosion
r(r).live = 0
hits = hits + 1
rockPoints = 50 * ((r(r).speed - minRockSpeed) / rockSpeedRange + (rockSizeRange - (r(r).r - minRockSize)) / rockSizeRange)
roundPoints = roundPoints + rockPoints
points = points + rockPoints
IF r
(r
).r
> 30 THEN ' split rock into ? new ones maxBabyRocks
= INT((r
(r
).r
- 10) / 10) maxBabyRocks = irnd&(2, maxBabyRocks) ' pick a number of baby Rocks
FOR br
= 1 TO maxBabyRocks
' new rock
newRockN = freeRock& ' get inactive rock number
newRock newRockN ' new identity and activate
r(newRockN).r = (r(r).r - 10) / maxBabyRocks ' split in equal parts minus 20% mass
r(newRockN).x = r(r).x + irnd&(-30, 30) ' thrown from parent
r(newRockN).y = r(r).y + irnd&(-30, 30)
r(newRockN).c = r(r).c ' same color as parent
r(newRockN).heading = rrnd(ship.angle - .75 * pi, ship.angle + .75 * pi)
END IF ' big enough to split b(i).live = 0 'kill bullet
IF b
(i
).live
THEN fcirc b
(i
).x
, b
(i
).y
, 3, _RGB32(255, 255, 0) 'draws bullet b(i).live = 0 'out of bounds
END IF ' bullet is in bounds END IF ' if ship still live lives = lives - 1
s$
= "Lives:" + STR$(lives
) + " Hits:" + STR$(hits
) + " Bullets:" + STR$(bullets
) + " Shooting:" + STR$(INT(hits
* 100 / bullets
)) + "%" s$ = "Press enter to enter next life."
kh = 0
_LIMIT 60 ' if ship dies let's rest and regroup before restart next life ship.x = -200: ship.y = -200 'get it out of the way
i = 0
drawStars 0
i = i + 1
IF i
MOD 30 = 29 AND rocks
< nRocks
THEN rocks
= rocks
+ 1: r
(rocks
).live
= 1 s$
= "Lives:" + STR$(lives
) + " Hits:" + STR$(hits
) + " Bullets:" + STR$(bullets
) + " Shooting:" + STR$(INT(hits
* 100 / bullets
)) + "%" IF points
> HS
THEN s$
= s$
+ " a New Record!" ELSE s$
= STR$(points
) + hs$
s$ = "Press q to quit, p or a to Play Again..."
IF beenHere
= 0 THEN 'static part stars
(i
).x
= RND * xmax: stars
(i
).y
= RND * ymax: stars
(i
).size
= 0 stars(i).c = irnd&(80, 140)
stars
(i
).x
= RND * xmax: stars
(i
).y
= RND * ymax: stars
(i
).size
= .3 stars(i).c = irnd&(80, 140)
stars
(i
+ 400).x
= RND * xmax: stars
(i
+ 400).y
= RND * ymax: stars
(i
+ 100).size
= .6 stars(i).c = irnd&(110, 170)
stars
(i
+ 540).x
= RND * xmax: stars
(i
+ 540).y
= RND * ymax: stars
(i
+ 170).size
= 1.2 stars(i).c = irnd&(140, 200)
stars
(i
+ 590).x
= RND * xmax: stars
(i
+ 590).y
= RND * ymax: stars
(i
+ 195).size
= 2.4 stars(i).c = irnd&(170, 235)
cy = ymax / 2
beenHere = 1
LINE (0, ymax
- i
)-(xmax
, ymax
- i
), _RGB(0, 0, .1 * i
+ 4) stars(i).x = stars(i).x + .2 * stars(i).size ^ stars(i).size
IF stars
(i
).x
> xmax
THEN stars
(i
).x
= -1 * RND * 20 fcirc stars
(i
).x
, stars
(i
).y
, stars
(i
).size
, _RGB32(stars
(i
).c
- 10, stars
(i
).c
, stars
(i
).c
+ 10)
side = irnd&(1, 4) 'bring rock in from one side, need to set heading according to side
aliens(i).fireX = ship.x: aliens(i).fireY = ship.y
aliens(i).fireX = irnd(10, xmax - 10): aliens(i).fireY = irnd(10, ymax - 10)
aliens(i).attackFrame = irnd(50, 400) ' EDIT a tweak to survive a little long before getting murdered with low lives over and over...
aliens(i).x = -10
aliens(i).y = rrnd(80, ymax - 80)
aliens(i).x = xmax + 10
aliens(i).y = rrnd(80, ymax - 80)
aliens(i).x = rrnd(80, xmax - 80)
aliens(i).y = -10
aliens(i).x = rrnd(80, xmax - 80)
aliens(i).y = ymax + 10
heading
= _ATAN2(aliens
(i
).fireY
- aliens
(i
).y
, aliens
(i
).fireX
- aliens
(i
).x
) aliens
(i
).dx
= alienSpeed
* COS(heading
) aliens
(i
).dy
= alienSpeed
* SIN(heading
) aliens(i).live = 0
aliens(i).transform = 0
aliens
(i
).c
= _RGB32(irnd
(128, 255), irnd
(0, 255), irnd
(0, 255))
r
= RND: g
= RND: b
= RND: beenHere
= 1: cnt
= 0 cnt = cnt + .2
plasma~&
= _RGB32(127 + 127 * SIN(r
* cnt
), 127 + 127 * SIN(g
* cnt
), 127 + 127 * SIN(b
* cnt
))
SOUND 6000 + i
* 200, .07 IF aliens
(i
).transform
= 0 THEN fellipse aliens
(i
).x
, aliens
(i
).y
, 6, 15, _RGB32(r
, g
- 120, b
- 100) fellipse aliens
(i
).x
, aliens
(i
).y
, 18, 11, _RGB32(r
, g
- 60, b
- 50) fellipse aliens
(i
).x
, aliens
(i
).y
, 30, 7, _RGB32(r
, g
, b
) fcirc aliens
(i
).x
- 30 + 11 * light
+ aliens
(i
).ls
, aliens
(i
).y
, 1, _RGB32(aliens
(i
).ls
* 50, aliens
(i
).ls
* 50, aliens
(i
).ls
* 50) aliens(i).ls = aliens(i).ls + 1
IF aliens
(i
).ls
> 5 THEN aliens
(i
).ls
= 0 drawBall aliens(i).x, aliens(i).y, 30, aliens(i).c
'time to shoot?
aliens(i).x = aliens(i).x + aliens(i).dx
aliens(i).y = aliens(i).y + aliens(i).dy
IF SQR((aliens
(i
).fireX
- aliens
(i
).x
) ^ 2 + (aliens
(i
).fireY
- aliens
(i
).y
) ^ 2) < 5 THEN 'transform into the bolder of death aliens(i).transform = 1
heading
= _ATAN2(ship.y
- aliens
(i
).y
, ship.x
- aliens
(i
).x
) aliens
(i
).dx
= 2.5 * COS(heading
) aliens
(i
).dy
= 2.5 * SIN(heading
) IF aliens
(i
).x
< -10 OR aliens
(i
).x
> xmax
+ 10 THEN IF aliens
(i
).y
< -10 OR aliens
(i
).y
> ymax
+ 10 THEN ' out of bounds goodbye bolder of death! aliens(i).live = 0 'man we dodged a bullet here!!!!
newAlien i 'reset the trap
aliens(i).attackFrame = aliens(i).attackFrame - 1
IF aliens
(i
).attackFrame
= 0 THEN aliens(i).live = 1
FOR i
= rocks
+ 1 TO nRocks
' look for inactive rock number
maxParticles = r * 4
NewDot i, x, y, r
rounds = r
dots(i).x = dots(i).x + dots(i).dx
dots(i).y = dots(i).y + dots(i).dy
fcirc dots(i).x, dots(i).y, dots(i).size, dots(i).kolor
NewDot (rounds + i), x, y, r
rounds = rounds + r
dots
(i
).x
= x
+ rd
* COS(angle
) dots
(i
).y
= y
+ rd
* SIN(angle
) dots
(i
).size
= RND * r
* .05 rd
= RND 'STxAxTIC recommended for rounder spreads dots
(i
).dx
= rd
* 10 * (10 - 2 * dots
(i
).size
) * COS(angle
) dots
(i
).dy
= rd
* 10 * (10 - 2 * dots
(i
).size
) * SIN(angle
) dots
(i
).kolor
= _RGBA32(rd
, rd
, rd
, 80)
SUB drawship
'simple red iso triangle pointed towards radianAngle 'burn out flame as thruster dies out
x4
= ship.x
+ .5 * ship.thrust
* COS(ship.angle
- 17 / 18 * pi
) y4
= ship.y
+ .5 * ship.thrust
* SIN(ship.angle
- 17 / 18 * pi
) x5
= ship.x
+ .5 * ship.thrust
* COS(ship.angle
- 19 / 18 * pi
) y5
= ship.y
+ .5 * ship.thrust
* SIN(ship.angle
- 19 / 18 * pi
) ftri ship.x, ship.y, x4, y4, x5, y5, &H99FFFF88
ship.thrust = ship.thrust - 1
'draw ship dead or alive thrust or not, calculate 3 points of triangle ship
fcirc ship.x, ship.y, 30, &H05FFFFFF
x1
= ship.x
+ 30 * COS(ship.angle
) ' front point y1
= ship.y
+ 30 * SIN(ship.angle
) ' x2
= ship.x
+ 30 * COS(ship.angle
+ .6666 * pi
) ' wing y2
= ship.y
+ 30 * SIN(ship.angle
+ .6666 * pi
) x3
= ship.x
+ 30 * COS(ship.angle
- .6666 * pi
) ' other wing y3
= ship.y
+ 30 * SIN(ship.angle
- .6666 * pi
) ftri ship.x
, ship.y
, x1
, y1
, x2
, y2
, _RGB32(80, 120, 80, 80) ftri ship.x
, ship.y
, x1
, y1
, x3
, y3
, _RGB32(60, 100, 60, 80) LINE (x1
, y1
)-(ship.x
, ship.y
), _RGB32(255, 255, 128)
RANDOMIZE USING r
(iRock
).seed
'this prevents having to save a particular sequence of random number DIM dx
, dy
, j
AS LONG, rRad
AS SINGLE, leg
AS SINGLE, x0
AS LONG, y0
AS LONG, rc
AS LONG, c~&
, x1
AS LONG, y1
AS LONG, xoff
, yoff
, i
AS LONG dx
= r
(iRock
).speed
* COS(r
(iRock
).heading
) dy
= r
(iRock
).speed
* SIN(r
(iRock
).heading
) 'update location r(iRock).ra = r(iRock).ra + r(iRock).spin
IF r
(iRock
).x
+ dx
+ r
(iRock
).r
< 0 OR r
(iRock
).x
+ dx
- r
(iRock
).r
> xmax
OR r
(iRock
).y
+ dy
+ r
(iRock
).r
< 0 OR r
(iRock
).y
+ dy
- r
(iRock
).r
> ymax
THEN IF iRock
<= rocks
THEN newRock iRock
ELSE r
(iRock
).live
= 0 EXIT SUB ' reassigned get out of here r(iRock).x = r(iRock).x + dx
r(iRock).y = r(iRock).y + dy
FOR j
= 10 TO 3 STEP -1 ' rock drawing (see demo program where developed code) rRad = .1 * j * r(iRock).r
leg
= rRad
* (RND * .7 + .3) x0
= r
(iRock
).x
+ leg
* COS(r
(iRock
).ra
) y0
= r
(iRock
).y
+ leg
* SIN(r
(iRock
).ra
) rc
= r
(iRock
).c
+ 30 * RND - 15 c~&
= _RGB32(rc
+ 5, rc
- 10, rc
+ 5) x1 = x0
y1 = y0
xoff
= RND * 20 - 10 + r
(iRock
).x
yoff
= RND * 20 - 10 + r
(iRock
).y
leg
= rRad
* (RND * .35 + .65) x2 = x0: y2 = y0
x2
= xoff
+ leg
* COS(i
* polyAngle
+ r
(iRock
).ra
) y2
= yoff
+ leg
* SIN(i
* polyAngle
+ r
(iRock
).ra
) ftri r(iRock).x, r(iRock).y, x1, y1, x2, y2, c~&
x1 = x2: y1 = y2
side = irnd&(1, 4) 'bring rock in from one side, need to set heading according to side
r(iRock).x = -100
r(iRock).y = rrnd(80, ymax - 80)
IF RND < .25 THEN r
(iRock
).heading
= _ATAN2(ship.y
- r
(iRock
).y
, ship.x
- r
(iRock
).x
) ELSE r
(iRock
).heading
= 3 * pi
/ 2 + RND * pi
r(iRock).x = xmax + 100
r(iRock).y = rrnd(80, ymax - 80)
IF RND < .25 THEN r
(iRock
).heading
= _ATAN2(ship.y
- r
(iRock
).y
, ship.x
- r
(iRock
).x
) ELSE r
(iRock
).heading
= pi
/ 2 + RND * pi
r(iRock).x = rrnd(80, xmax - 80)
r(iRock).y = -100
IF RND < .25 THEN r
(iRock
).heading
= _ATAN2(ship.y
- r
(iRock
).y
, ship.x
- r
(iRock
).x
) ELSE r
(iRock
).heading
= RND * pi
r(iRock).x = rrnd(80, xmax - 80)
r(iRock).y = ymax + 100
IF RND < .25 THEN r
(iRock
).heading
= _ATAN2(ship.y
- r
(iRock
).y
, ship.x
- r
(iRock
).x
) ELSE r
(iRock
).heading
= pi
+ RND * pi
r(iRock).speed = rrnd(minRockSpeed, maxRockSpeed) 'speed, rotation angle, radius, gray coloring, spin, seed, hit for explosion
r
(iRock
).ra
= RND * 2 * pi
r(iRock).r = irnd&(minRockSize * 3, maxRockSize) 'every parent rock can be split up into at least 2 - 10 size rocks
r(iRock).c = irnd&(60, 110) ' Ken request increase in rock color
r(iRock).spin = rrnd(-pi / 20, pi / 20)
r
(iRock
).seed
= INT(RND * 64000) - 32000 r(iRock).explodeFrame = 0
r(iRock).live = 1
FUNCTION irnd&
(n1
, n2
) 'return an integer between 2 numbers IF n1
> n2
THEN l%
= n2: h%
= n1
ELSE l%
= n1: h%
= n2
irnd&
= INT(RND * (h%
- l%
+ 1)) + l%
FUNCTION rrnd
(n1
, n2
) ' return number (expecting reals =_single, double, _float depending on default / define setup) rrnd
= (n2
- n1
) * RND + n1
f = 1 - rr / r
fcirc x
, y
, rr
, _RGB32(red
* f
, grn
* f
, blu
* f
)
w2 = xr * xr: h2 = yr * yr: h2w2 = h2 * w2
LINE (CX
- xr
, CY
)-(CX
+ xr
, CY
), C
, BF
y = y + 1
x
= SQR((h2w2
- y
* y
* w2
) \ h2
) LINE (CX
- x
, CY
+ y
)-(CX
+ x
, CY
+ y
), C
, BF
LINE (CX
- x
, CY
- y
)-(CX
+ x
, CY
- y
), C
, BF
_BLEND a&
'<<<< new 2019-12-16 fix
x0 = R: y0 = 0: e = 0
y0 = y0 + 1
LINE (x
- x0
, y
+ y0
)-(x
+ x0
, y
+ y0
), C
, BF
LINE (x
- x0
, y
- y0
)-(x
+ x0
, y
- y0
), C
, BF
e = e + 2 * y0
LINE (x
- y0
, y
- x0
)-(x
+ y0
, y
- x0
), C
, BF
LINE (x
- y0
, y
+ x0
)-(x
+ y0
, y
+ x0
), C
, BF
x0 = x0 - 1: e = e - 2 * x0
LINE (x
- R
, y
)-(x
+ R
, y
), C
, BF
