+++ /dev/null
-(*\r
- DEMO02 - Texture mapping and palette rotation\r
- (c) 1994 by Alessandro Scotti\r
-*)\r
-uses Crt, Modex, Plasma, Threed;\r
-\r
-const\r
- LSIZE = 85;\r
- Trans : TPoint = ( X:0; Y:0; Z:0 );\r
-type\r
- T2DPoint = record\r
- X, Y: integer;\r
- end;\r
- TTexture = record\r
- Desc : array[ 0..3 ] of T2DPoint;\r
- Width : word;\r
- Data : array[ 1..64*64 ] of byte;\r
- end;\r
- TQuad = record\r
- VtxCnt : word;\r
- Vtx : array[ 0..3 ] of word;\r
- Texture: word;\r
- end;\r
-var\r
- Vtx : array[ 0..7 ] of TPoint;\r
- XVtx : array[ 0..7 ] of TPoint;\r
- VVtx : array[ 0..7 ] of T2DPoint;\r
- Face : array[ 0..5 ] of TQuad;\r
- Txts : array[ 0..5 ] of TTexture;\r
- Nrm : array[ 0..5 ] of TPoint;\r
- XNrm : array[ 0..5 ] of TPoint;\r
- Page : word;\r
- Palette: array[ byte ] of record R, G, B: byte; end;\r
-\r
-(* Make a 64x64 plasma to be used as texture *)\r
-procedure MakeTexture( Idx: word );\r
-var\r
- I: word;\r
-begin\r
- mxFillBox( 0, 0, 64, 64, 0, OP_SET );\r
- MakePlasma( 0, 0, 64, 64, 96, Random(192)+1, Random(192)+1, Random(192)+1 );\r
- mxGetImage( @Txts[Idx].Data, 0, 0, 64, 64 );\r
- (* Texture vertexes are 8:8 fixed, add $80 (0.5) for best results *)\r
- with Txts[Idx] do begin\r
- Desc[0].X := $80; Desc[0].Y := $80;\r
- Desc[1].X := $80; Desc[1].Y := $3F80;\r
- Desc[2].X := $3F80; Desc[2].Y := $3F80;\r
- Desc[3].X := $3F80; Desc[3].Y := $80;\r
- Width := 64;\r
- end;\r
-end;\r
-\r
-procedure Init;\r
-var\r
- I: integer;\r
-begin\r
- (* Build vertexes for a cube *)\r
- with Vtx[0] do begin X:=-LSIZE; Y:=-LSIZE; Z:=-LSIZE; end;\r
- with Vtx[1] do begin X:=+LSIZE; Y:=-LSIZE; Z:=-LSIZE; end;\r
- with Vtx[2] do begin X:=-LSIZE; Y:=+LSIZE; Z:=-LSIZE; end;\r
- with Vtx[3] do begin X:=+LSIZE; Y:=+LSIZE; Z:=-LSIZE; end;\r
- with Vtx[4] do begin X:=-LSIZE; Y:=-LSIZE; Z:=+LSIZE; end;\r
- with Vtx[5] do begin X:=+LSIZE; Y:=-LSIZE; Z:=+LSIZE; end;\r
- with Vtx[6] do begin X:=-LSIZE; Y:=+LSIZE; Z:=+LSIZE; end;\r
- with Vtx[7] do begin X:=+LSIZE; Y:=+LSIZE; Z:=+LSIZE; end;\r
- for I:=0 to 7 do begin (* Make points 16:16 fixed *)\r
- Vtx[I].X := Vtx[I].X*$10000;\r
- Vtx[I].Y := Vtx[I].Y*$10000;\r
- Vtx[I].Z := Vtx[I].Z*$10000;\r
- end;\r
- (* Build faces *)\r
- with Face[0] do begin Vtx[0]:=0; Vtx[1]:=2; Vtx[2]:=3; Vtx[3]:=1; end;\r
- with Face[1] do begin Vtx[0]:=4; Vtx[1]:=5; Vtx[2]:=7; Vtx[3]:=6; end;\r
- with Face[2] do begin Vtx[0]:=0; Vtx[1]:=1; Vtx[2]:=5; Vtx[3]:=4; end;\r
- with Face[3] do begin Vtx[0]:=1; Vtx[1]:=3; Vtx[2]:=7; Vtx[3]:=5; end;\r
- with Face[4] do begin Vtx[0]:=2; Vtx[1]:=0; Vtx[2]:=4; Vtx[3]:=6; end;\r
- with Face[5] do begin Vtx[0]:=7; Vtx[1]:=3; Vtx[2]:=2; Vtx[3]:=6; end;\r
- for I:=0 to 5 do Face[I].Texture := I;\r
- (* Build textures and palette *)\r
- Randomize;\r
- FillChar( Palette, SizeOf(Palette), 0 );\r
- MakePlasmaPalette( Palette, PAL_RGB );\r
- mxSetPalette( @Palette, 0, 193 );\r
- for I:=0 to 5 do MakeTexture( I );\r
-end;\r
-\r
-var\r
- AX, AY, AZ: byte;\r
- I: word;\r
-begin\r
- mxInit;\r
- mxSetMode( MX_320x240 );\r
- Init;\r
- Page := 240; (* Start with hidden page *)\r
-\r
- AX := 0;\r
- AY := 0;\r
- AZ := 0;\r
- (* Init 3D transforms, perspective is intentionally exaggerated *)\r
- tdSetTranslation( Trans );\r
- tdSetPerspective( 400*$10000, $10000, $10000 );\r
- (* Main loop, all magic here! *)\r
- while( not KeyPressed ) do begin\r
- tdSetRotation( AX, AY, AZ ); (* Set new angles *)\r
- tdTransform( Vtx, XVtx, 8 ); (* 3D transform points *)\r
- tdTransformToImage( XVtx, VVtx, 8, 160, 120+Page );\r
- Inc( AX, 1 ); (* Bump angles *)\r
- Inc( AY, 1 );\r
- Inc( AZ, 2 );\r
- mxSetClipRegion( 0, Page, 320, 240 ); (* Set clip to new page *)\r
- mxSetClip( TRUE );\r
- mxFillBox( 0, Page, 320, 240, 0, OP_MOVE ); (* Clear screen *)\r
- mxRotatePalette( @Palette[1], 192, 3 ); (* Rotate palette *)\r
- (* Draw cube: backface culling is straighforward in this case, so *)\r
- (* it can be handled by the polygon filling procedure *)\r
- for I:=0 to 5 do\r
- mxTexturePoly( 4, Face[I].Vtx, VVtx, Txts[I].Desc, Txts[I].Data, Txts[I].Width );\r
- mxStartLine( Page ); (* Flip pages *)\r
- mxSetPalette( @Palette[1], 1, 192 ); (* Set new palette *)\r
- Page := 240-Page;\r
- end;\r
-\r
- mxSetMode( MX_TEXT );\r
- mxTerm;\r
-end.\r
projects / 16.git / blobdiff