X-Git-Url: http://4ch.mooo.com/gitweb/?a=blobdiff_plain;f=16%2Fxw%2Fmodex%2FDEMO01.PAS;fp=16%2Fxw%2Fmodex%2FDEMO01.PAS;h=c684acdd3d0e24afbff89e39dba66bc982a624c3;hb=47cdc66151d973d975d0e31fb8a786eb639bebdb;hp=0000000000000000000000000000000000000000;hpb=4b23f27092a9470a741e3a18261ad389fd1929db;p=16.git diff --git a/16/xw/modex/DEMO01.PAS b/16/xw/modex/DEMO01.PAS new file mode 100755 index 00000000..c684acdd --- /dev/null +++ b/16/xw/modex/DEMO01.PAS @@ -0,0 +1,126 @@ +(* + DEMO01 - Sprites, page flipping and palette rotation + Copyright (c) 1994 Alessandro Scotti +*) +uses Crt, Modex; + +const + MAX_SPRITE = 100; +type + (* Sprite structure *) + TSprite = record + X, Y : integer; (* Sprite coordinates *) + DX,DY: integer; (* Deltas for sprite movement *) + W, H : integer; (* Sprite width and height *) + Image: array[ 1..16, 1..16 ] of byte; (* Sprite image data *) + end; + (* RGB color structure *) + TRgb = record + R, G, B: byte; + end; +var + S : array[ 1..MAX_SPRITE ] of TSprite; (* An array of sprites *) + Palette: array[ byte ] of TRgb; (* Palette *) + Page : word; (* Page offset *) + I : word; + +(* Initializes a sprite structure *) +procedure sxInit( var S: TSprite ); +var + I: word; +begin + S.X := Random( 320 ); (* Initialize position with random values *) + S.Y := Random( 240 ); + S.DX := Random( 7 )-3; (* Initialize speed with random values *) + S.DY := Random( 7 )-3; + S.W := 16; (* Size is fixed in this program *) + S.H := 16; + (* The image is a square with a hole inside *) + FillChar( S.Image, SizeOf(S.Image), Random(15)+1 ); + for I:=5 to 12 do FillChar( S.Image[ I, 5 ], 8, 0 ); +end; + +(* Moves a sprite *) +procedure sxMove( var S: TSprite ); +begin + Inc( S.X, S.DX ); (* Get new position *) + Inc( S.Y, S.DY ); + (* Check sprite position, change delta if needed *) + if( S.X > 320 ) then begin + S.X := 320; + S.DX := -S.DX; + end; + if( S.X < -16 ) then begin + S.X := -16; + S.DX := -S.DX; + end; + if( S.Y > 240 ) then begin + S.Y := 240; + S.DY := -S.DY; + end; + if( S.Y < -16 ) then begin + S.Y := -16; + S.DY := -S.DY; + end; + (* Draw the sprite, note the Page offset added to the *) + (* Y coordinate of the image *) + mxPutImage( @S.Image, S.X, Page+S.Y, S.W, S.H, OP_TRANS ); +end; + +begin + (* Initialize library *) + mxInit; + + (* Enter graphics mode *) + mxSetMode( MX_320x240 ); + + (* Print initialization message *) + mxSetTextColor( 15, OP_TRANS ); + mxOutStr( 4, 4, 'Initializing...' ); + + (* Initialize sprites *) + for I:=1 to MAX_SPRITE do sxInit( S[I] ); + + (* Draw background *) + for I:=1 to 192 do begin + mxCircle( 160, 480+120, I, I+63 ); + mxCircle( 161, 480+120, I, I+63 ); + end; + + (* Compute and set palette *) + for I:=1 to 192 do with Palette[I+63] do begin + R := 0; + G := 0; + B := 0; + if( I < 64 ) then + R := I shr 1+31 + else if( I < 128 ) then + G := (I-64) shr 1+31 + else + B := (I-128) shr 1+31; + end; + mxSetPalette( @Palette[64], 64, 192 ); + + (* Main loop *) + Page := 240; + while( not KeyPressed ) do begin + (* Set clip region to current page *) + mxSetClipRegion( 0, Page, 320, 240 ); + mxSetClip( TRUE ); + (* Restore background *) + mxBitBlt( 0, 480, 320, 240, 0, Page ); + (* Draw sprites *) + for I:=1 to MAX_SPRITE do sxMove( S[I] ); + (* Print message *) + mxOutStr( 4, Page+4, 'Some sprites moving...' ); + (* Flip page *) + mxStartLine( Page ); + Page := 240-Page; + (* Animate palette *) + mxSetPalette( @Palette[64], 64, 192 ); + mxRotatePalette( @Palette[64], 192, 3 ); + end; + + mxSetMode( MX_TEXT ); + mxTerm; +end.