Toying with COS & SIN commands to produce 2D effects.

[I love my Brick]

Try this small modification to the above code.  Compile it, move the mouse like crazy with left button held down. The overall effect is very similar to a skyscape coming towards you.

//// Skyscape effect

GETSCREENSIZE w,h

GRABSPRITE 0,0,0,w,h

WHILE TRUE

ROTOSPRITE 0,0,0,0 // draw current display

MOUSESTATE mx, my, b1, b2 // read da mouse

IF b1=1 // button pressed

FOR a=0 TO 90 STEP 5 // change the "STEP" for different effects

DRAWRECT 300+COS(a)*50+mx,200+SIN(a)*50+my,mx-mx/2,my-my/2,RGB(255/mx+my,mx+my,255)
DRAWRECT 300-COS(a)*50-mx,200+SIN(a)*50-my,mx-mx/2,my-my/2,RGB(255/mx+my,mx+my,255)
DRAWRECT 300+COS(a)*50-mx,200+SIN(a)*50+my,mx-mx/2,my-my/2,RGB(255/mx+my,mx+my,255)
DRAWRECT 300+COS(a)*50+mx,200+SIN(a)*50-my,mx-mx/2,my-my/2,RGB(255/mx+my,mx+my,255)

NEXT

ENDIF

GRABSPRITE 0,0,0,w,h // grab new screen display

SHOWSCREEN

WEND

[I love my Brick]

erm...or a strange new world

[I love my Brick]

Replace the above code with the following:

//
DRAWRECT 300+COS(a)*50+mx,200+SIN(a)*50+my,mx-mx/2,my-my/2,RGB(255/mx+my,200,mx+my)
DRAWRECT 300-COS(a)*50-mx,200+SIN(a)*50-my,mx-mx/2,my-my/2,RGB(0,mx+my,255)
//
DRAWRECT 300+COS(a)*50-mx,200+SIN(a)*50+my,mx-mx/2,my-my/2,RGB(mx+my,200,mx+my)
DRAWRECT 300+COS(a)*50+mx,200+SIN(a)*50-my,mx-mx/2,my-my/2,RGB(0,mx+my,255)
//

It creates a simple sky & landscape - fun for the kids.

[I love my Brick]

Code: GLBasic [Select]

// The tunnel that might be made of jelly tweaked.
// A 50 pence production (c)
// created by "I love my brick"

GETSCREENSIZE w,h

tsize=51 ; xpos=320 ; ypos=200 ; shortradius=14 ; longradius=25 ; rot=1

        TYPE tube ; x ; y ; sizex ; sizey ; speed ; r ; g ; b ; sx ; sy ; ENDTYPE

GLOBAL t[] AS tube ; DIM t[tsize]

        FOR a=0 TO tsize-1

        t[a].speed=0.5 ; t[a].x=xpos ;  t[a].y=ypos ; t[a].sizex=shortradius ; t[a].sizey=longradius
        INC shortradius,10; INC longradius,10 ;
        t[a].r=0; t[a].g=0; t[a].b=0 ;
        INC t[a].sx,2 ; INC t[a].sy,2

        NEXT

/////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Main Loop
/////////////////////////////////////////////////////////////////////////////////////////////////////////////

WHILE NOT FALSE
ROTOSPRITE 0,0,0,0.1
FOR bb=0 TO 50

FOR aa=0 TO 360 STEP 15

        x=t[bb].x+t[bb].sizex*COS(aa)*COS(rot)+t[bb].sizey*SIN(aa)*SIN(rot) // the maths bit
        y=t[bb].y+t[bb].sizex*COS(aa)*SIN(rot)-t[bb].sizey*SIN(aa)*COS(rot)

        DRAWRECT x,y,t[bb].sx,t[bb].sy, RGB(t[bb].r, t[bb].g, t[bb].b)
NEXT

        INC t[bb].sx,0.1 ; INC t[bb].sy,0.1 // increase the size of the block
        INC t[bb].sizex,t[bb].speed ; INC t[bb].sizey,t[bb].speed ; INC t[bb].speed,0.1 // acceleration

        IF t[bb].sizex>500 // return to centre of screen
        t[bb].sizex=4 ; t[bb].sizey=25 ;  t[bb].speed=0.1
        t[bb].sx=1.1 ; t[bb].sy=1.1 ; t[bb].sizex=10+RND(20) ; t[bb].sizey=5+RND(10)
        ENDIF
NEXT

        INC rot, 10 // let the wobble begin!
                // set new values for next set of colour
        ran1=RND(255)
        ran2=RND(255)
        ran3=RND(255)

        FOR a=0 TO 50 STEP RND(50) // alter all colours
        t[a].r=ran1
        t[a].b=ran2
        t[a].g=ran3
        NEXT
       
        IF KEY(203)=1 THEN INC x
        GRABSPRITE 0,0,0,w,h
        SHOWSCREEN
WEND // infinity in action!

[I love my Brick]

Code: GLBasic [Select]

// Spiral code tweak
// I LOVE MY BRICK

GETSCREENSIZE w,h

GRABSPRITE 0,0,0,w,h

change=3.75

//////////
// DA LOOP
//////////

WHILE TRUE

INC count

        IF count=5

                ROTOSPRITE 0,0,0,0.1 // draw current display

                count=0

        ELSE

                ROTOSPRITE 0,0,0,0

        ENDIF

FOR aa=1 TO 26000 STEP change

        x=COS(aa)/32
        y=SIN(aa)/32

        col=RGB(COS(r)*100+100,SIN(count+aa*5)*127+127,SIN(b+aa*5)*127+127)

        DRAWRECT 320+y*aa/2,200+x*aa/2,2,2,col

NEXT

INC change, 0.4 // let the fun begin!

        GRABSPRITE 0,0,0,w,h // grab new screen display

SHOWSCREEN

WEND

[Hemlos]

Awesome is one of many words i can think of.
Ill be giving my shrink your name when im in a straight jacket after i attepmt to use these ideas with my 3d particle engine.

[I love my Brick]

Well look at me, I think Im a priest and drag a brick around on a piece of string. The code Ive been posting has had a heavy effect upon my sanity

But if you do try to implement anything into your particle engine, just remember..."no pain, no gain"

[Hemlos]

You gave me your bug..
Dont stare at this too long.

Code: GLBasic [Select]

// Spiral code tweak
// Hemlos

SETSCREEN 800,600,TRUE
FUN1=1


LIMITFPS 40

LOCAL  w,h
GETSCREENSIZE w,h
GRABSPRITE 0,0,0,w,h

WHILE TRUE
        ROTOSPRITE 0,0,0, 4.0
        ALPHAMODE 1.0
        FOR aa=0 TO 359 STEP FUN1

                INC spread, 1.0

                x=COS(aa)*spread
                y=SIN(aa)*spread
               
                IF spread>w/2 THEN spread=1.0
       
                Tweakcolor1=RND(255)/2.0+64
                col=RGB(COS(change)*Tweakcolor1,SIN(change)*Tweakcolor1,SIN(change)*Tweakcolor1)
                DRAWRECT w/2+x,h/2+y,1,1,col

        NEXT

INC change, 1.0
IF change=360.0; change=1.0; ENDIF;

GRABSPRITE 0,0,0,w,h // grab new screen display

SHOWSCREEN

WEND

[I love my Brick]

Very nice Hemlos, reminds me of some kind of fossilised shell.

[Hemlos]

Reminds me of vertigo

This thread belongs in the math section i think, how about you?

[I love my Brick]

Yes I agree, now how do we move it?

[Hemlos]

Well, we merely need to mention it i suppose!
Obviously, theres a little bird with an impecable sense of direction flying around the forums .

[I love my Brick]

Does this bird look like the pheonix you display near you name?

Thankx.

Now Im in Math land lets hope users can see that circluar Math can with clever imagination be implemented into dazzling effects - often cheap on the processor leaving space for other requirements.
 

[Hemlos]

No, it was another mod

[I love my Brick]

I was just jesting Hemlos.  I read "bird" and saw a "bird" representing you.

I`m an admirer of your manipulation of the 2d screen.  keep it up!

Me, well too long in the tooth - so I use old fashioned ways with present day power to create a reaction on screen.

(which often only takes a few lines of code. - I always knew one day they would work)

All code Ive placed is a reflection of ideas that never worked on the humble Amiga.(slow frame rate)

Then I see guys like you with a platform that makes anything possible - unlike the ST & Amiga.

I`m learning Hemlos to embrace this new platform via young guys like you.