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A Small Game Tutorial (from 2014)

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A Small Game Tutorial (from 2014)
SMcNeill Online
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#1
11-13-2023, 06:21 AM
Digging through some old junk on old drives once again, and I found more QB64 goodies.   This one is a HTML tutorial on making a little space avoidance type game, and from initial testing all still works as it should -- even after almost 10 years!  (This file was dated 6/6/2014 on my drive!)

The final version has you making this game:

Code: (Select All)
_TITLE "Space 64"



DIM asteroidx(100), asteroidy(100), asteroidspeed(100)



SCREEN 13







DATA 000,000,000,000,000,000,000,000,000,000

DATA 000,000,015,015,015,015,015,000,000,000

DATA 000,015,015,015,015,007,007,015,000,000

DATA 000,015,015,015,015,015,015,015,015,000

DATA 000,015,015,015,015,015,015,015,015,015

DATA 000,015,015,015,015,015,015,015,015,000

DATA 000,000,015,015,015,015,015,015,000,000

DATA 000,000,000,000,000,000,000,000,000,000

DATA 000,000,000,000,000,000,000,000,000,000

DATA 000,000,000,000,000,000,000,000,000,000



FOR y = 1 TO 10

    FOR x = 1 TO 10



        READ c

        PSET (x, y), c

    NEXT

NEXT



ship = _NEWIMAGE(11, 11, 13)



_PUTIMAGE (1, 1)-(10, 10), , ship, (1, 1)-(10, 10)



CLS



DATA 000,000,000,000,000,000,000,000,000,000

DATA 000,000,000,006,006,006,000,000,000,000

DATA 000,000,006,006,006,006,006,000,000,000

DATA 000,006,012,006,006,006,006,006,000,000

DATA 000,006,006,006,006,012,006,006,000,000

DATA 000,006,006,006,006,006,006,006,000,000

DATA 000,000,006,006,012,006,006,000,000,000

DATA 000,000,006,006,006,006,000,000,000,000

DATA 000,000,000,006,006,000,000,000,000,000

DATA 000,000,000,000,000,000,000,000,000,000



FOR y = 1 TO 10

    FOR x = 1 TO 10



        READ c

        PSET (x, y), c

    NEXT

NEXT



obstacle = _NEWIMAGE(11, 11, 13)



_PUTIMAGE (1, 1)-(10, 10), , obstacle, (1, 1)-(10, 10)



CLS



DATA 000,000,000,000,000,000,000,000,000,000

DATA 000,000,004,004,000,004,004,000,000,000

DATA 000,004,012,012,004,012,012,004,000,000

DATA 000,004,012,012,012,012,012,004,000,000

DATA 000,004,012,012,012,012,012,004,000,000

DATA 000,004,012,012,012,012,012,004,000,000

DATA 000,000,004,012,012,012,004,000,000,000

DATA 000,000,000,004,012,004,000,000,000,000

DATA 000,000,000,000,004,000,000,000,000,000

DATA 000,000,000,000,000,000,000,000,000,000





FOR y = 1 TO 10

    FOR x = 1 TO 10



        READ c

        PSET (x, y), c

    NEXT

NEXT



life = _NEWIMAGE(11, 11, 13)



_PUTIMAGE (1, 1)-(10, 10), , life, (1, 1)-(10, 10)



CLS



lives = 3



shipx = 10 'we set the x position of the ship to 10 and the y position is set

shipy = 95 'at the middle of the screen (middle of the ship is 5 hence 100-5=95).



DO



    _LIMIT 60

    CLS



    IF explosion = 0 THEN

        _PUTIMAGE (shipx, shipy), ship 'let's only display it when explosion = 0



        'we can make some fire behind the ship by randomly setting some red pixels behind it.

        FOR k = 1 TO 10: PSET (shipx - INT(RND * 5), shipy + INT(RND * 6) + 2), 4: NEXT

    END IF





    'display lives:

    IF lives > 0 THEN

        FOR k = 1 TO lives

            _PUTIMAGE (k * 10, 0), life

        NEXT



    END IF



    'display number of numbers collected:

    _PRINTSTRING (0, 2), LTRIM$(STR$(collected))





    IF _KEYDOWN(CVI(CHR$(0) + "H")) THEN shipy = shipy - 1

    IF _KEYDOWN(CVI(CHR$(0) + "P")) THEN shipy = shipy + 1

    IF _KEYDOWN(CVI(CHR$(0) + "K")) THEN shipx = shipx - 1

    IF _KEYDOWN(CVI(CHR$(0) + "M")) THEN shipx = shipx + 1

    IF _KEYDOWN(27) THEN END





    IF shipx + 10 > 319 THEN shipx = 319 - 10

    IF shipx < 0 THEN shipx = 0

    IF shipy + 10 > 199 THEN shipy = 199 - 10

    IF shipy < 0 THEN shipy = 0





    IF numasteroids > 0 THEN

        FOR asteroid = 1 TO numasteroids



            _PUTIMAGE (asteroidx(asteroid), asteroidy(asteroid)), obstacle



            IF explosion = 0 THEN 'this is added so that the ship doesn't explode twice (it is invulnerable for a while)



                IF shipx + 10 >= asteroidx(asteroid) AND shipx <= asteroidx(asteroid) + 10 THEN

                    IF shipy + 10 >= asteroidy(asteroid) AND shipy <= asteroidy(asteroid) + 10 THEN





                        explosion = 1

                        lives = lives - 1



                    END IF

                END IF



            END IF



            asteroidx(asteroid) = asteroidx(asteroid) - asteroidspeed(asteroid)







            IF asteroidx(asteroid) < 0 - 10 THEN

                removeasteroid = asteroid

            END IF





        NEXT

    END IF





    IF removeasteroid <> 0 THEN

        FOR k = removeasteroid TO numasteroids

            asteroidx(k) = asteroidx(k + 1)

            asteroidy(k) = asteroidy(k + 1)

            asteroidspeed(k) = asteroidspeed(k + 1)

        NEXT

        numasteroids = numasteroids - 1

        removeasteroid = 0

    END IF









    IF explosion = 1 THEN

        expl = expl + 1



        FOR k = 1 TO expl

            PSET (shipx - INT(RND * k), shipy - INT(RND * k)), INT(RND * 255)

            PSET (shipx + INT(RND * k), shipy + INT(RND * k)), INT(RND * 255)

            PSET (shipx - INT(RND * k), shipy + INT(RND * k)), INT(RND * 255)

            PSET (shipx + INT(RND * k), shipy - INT(RND * k)), INT(RND * 255)

        NEXT

        IF expl > 30 THEN expl = 0: explosion = 0

    END IF





    rand = INT(RND * (30 - (collected * 3))) + 1 '(collected*3) makes the asteroids more frequent

    IF rand = 1 THEN

        numasteroids = numasteroids + 1

        asteroidx(numasteroids) = 319 + 10

        asteroidy(numasteroids) = INT(RND * 219) + 1

        asteroidspeed(numasteroids) = RND * 1.5 + .5 + ((collected + 1) / 50) '(collected+1)/50 makes them faster

    END IF







    IF heart = 0 THEN 'only if heart is 0 should we create one (it is already created otherwise)

        rand = INT(RND * 1000) + 1 'very seldom does a heart arrive

        IF rand = 1 THEN

            heart = 1

            heartx = 319 + 10

            hearty = INT(RND * 219) + 1

            heartspeed = RND * 1.5 + .5

        END IF

    END IF



    'here we display the heart and handles the collision for the heart:

    IF heart = 1 THEN

        _PUTIMAGE (heartx, hearty), life

        heartx = heartx - heartspeed



        IF heartx < -10 THEN heart = 0 'remove it if it goes outside the screen.



        IF shipx + 10 >= heartx AND shipx <= heartx + 10 THEN

            IF shipy + 10 >= hearty AND shipy <= hearty + 10 THEN

                'it collided with the heart!

                heart = 0 'set heart to 0 to remove it

                lives = lives + 1 'add 1 to lives



            END IF

        END IF



    END IF



    'we do the same for the numbers as with the heart:

    IF number = 0 THEN

        rand = INT(RND * 500) + 1 'very seldom does a number arrive

        IF rand = 1 THEN

            number = 1

            numberx = 319 + 10

            numbery = INT(RND * 219) + 1

            numberspeed = RND * 1.5 + .5

        END IF

    END IF



    'here we display the number and handle the collision for the number:

    IF number = 1 THEN

        _PRINTSTRING (numberx, numbery), STR$(collected + 1) 'we use printstring to represent the number

        numberx = numberx - numberspeed

        IF numberx < -10 THEN number = 0

        IF shipx + 10 >= numberx AND shipx <= numberx + 10 THEN

            IF shipy + 10 >= numbery AND shipy <= numbery + 10 THEN

                'it collided with the number!

                collected = collected + 1 'add one to the collected numbers

                number = 0 'set number to 0 to remove it

            END IF

        END IF

    END IF







    'loose:

    IF lives < 0 THEN

        LOCATE 10, 15: PRINT "GAME OVER"

        _DISPLAY: END

    END IF



    'win:

    IF collected = 9 THEN

        LOCATE 10, 16: PRINT "YOU WIN"

        _DISPLAY: END

    END IF







    _DISPLAY

LOOP


And the whole tutorial file is here:
.html   A_Small_Game_Tutorial.html (Size: 52.38 KB / Downloads: 99)
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SMcNeill Online
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#2
11-13-2023, 07:10 AM
A few more old tutorials from back in the same time frame.

BASIC Programing Basics Tutorial --> 
.html   BASIC_Programming_Basics.html (Size: 51.28 KB / Downloads: 143)
Graphics with QB64 -->
.html   Graphics_with_QB64.html (Size: 19.01 KB / Downloads: 99)
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Kernelpanic Offline
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#3
11-13-2023, 09:11 PM
Graphic example Earth: I get an error message at 17, 32, 41.

The link to the image doesn't work - clearly, it's too old. Here is a "new earth".  Big Grin

[Image: Erde-frei.jpg]
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