2000 Graphics Drawing on the NEC Starlet William H. Ball 71735,505 Introduction The DRAW.COM Interpreter DRAW.CO i graphic drawin progra fo th NE Starlet Yo ca us th progra t dra picture o th Starlet' scree an the dum th pictur t you printer DRAW.CO i no interactive bu i "file-draw progra tha load you ASCI tex fil o command an draw th pictur o you screen Yo ca sav you picture fo late use DRAW.CO feature ove 2 command fo movin aroun th Starlet' scree an creatin an printin images Th synta i simila t Microsof BASIC' drawin commands. With DRAW.COM you can: - addres an tur o o of an o th Starlet' 61,44 pixels - draw lines between any two points on the screen - dra boxes circles an fille boxe o circle o an size - design your own character fonts for drawing - dump your picture to your Tandy or IBM graphic printer I yo can' wait an wan t tr thi program us thi command: DRAW DEMO.DRW or DRAW DRAWME.DRW an hi th Retur key You'l se tha th Starle ca d graphics just as well as its bigger brothers! Thi progra i mini-interprete tha take you ASCI fil o UPPERCAS command an draw picture o th Starlet' screen I yo hav Tand o IB graphi printer yo ca dum the screen t you printe a an poin i th file I'v limite th siz o th ASCI fil t 500 characters bu yo ca chang thi defaul b recompilin th program. Your draw file must be specified on the command. For example, DRAW MYFILE.DRW wil loa DRAW the loa th specifie ASCI tex file I yo d no specif "MYFILE.DRW, DRA wil exi wit "fil no specified error I DRA canno fin "MYFILE.DRW, i wil exi wit "fil no found error. Screen Size Th Starlet' LC resolutio i 48 dot wid (X-axis b 12 dot hig (Y-axis) s X' valu ca b betwee an 480 ca hav valu o t 128 A x, positio o 0, i th uppe lef o th screen. 0,0 ----------------------------------------- 480,0 | | | The NEC's screen is a liquid- | | crystal display of 480 dots | | by 128 dots. The screen corners | | are x,y positions. | | | | | 0,128 ----------------------------------------- 480,128 Design Your Own Fonts I'v als include comman yo ca us t desig you ow characte font o icons Yo ca us matri o u t 1 dot wid an 1 dot high Thi mean yo ca fi abou 3 character o icon i th maximu siz acros th screen mor i yo overla them Abou nin character o icon wil b a hig a th screen Again yo ca chang thi b recompilin th program Thes limit ar becaus Small- ca onl handl integers as large as 32,768. Index of Commands Here's a quick list of the commands and their syntax: Abx,b1,b2,b3,...bx - draw a user-defined character or icon Bx,y - draw a box to x,y Cn - set color to n Dn - move down n units Fn,x,y - draw box to x,y and fill with color n Gn - move north east n units while plotting Hn - move south east n units while plotting In - move south west n units while plotting Jn - move north west n units while plotting K - wait for a keypress before proceeding Ln - move left n units while plotting Mx,y - move to x,y Nx,y - draw line to x,y Pn - dump screen to printer Rn - move right n units while plotting Sx,y str" - move to approx x,y cursor pos and print str Tx,y,r - draw a circle of radius r around x,y Un - move up n units while plotting Vx,y,r - draw a filled circle of radius r around x,y X - XOR screen ; - ignore rest of line (used for comments) $ - end of program, wait for keypress, quit Th dra fil mus b a ASCI fil create b you edito o WordStar' non-documen mode Al command mus b i uppercase Excep fo th single-lette commands al command mus b followe b a integer Yo ma us an characte t separat th x, integers usuall us comma Th command' strin mus b separate fro th intege b space an mus b delimite by a quote mark. See the S command description. Th Starle mus b i th VT-10 mode becaus som of th commands use that terminal's escape sequences. Fo specifi detail concernin th commands refe t th following information. Command Syntax $ Thi characte tell DRAW.CO t wai fo keypress clea th screen, then quit and return to the MENU command line. ; Ignor th line becaus th tex i comment Yo ca us thi comman a reminde an t documen you picture Thi comman shoul b th firs characte o line I yo hav thi comman followin strin o drawin commands don' us an uppercas letters o DRAW.CO wil interpre th comment a commands Fo example, ; THIS IS A COMMENT AND DRAW.COM WILL IGNORE THIS LINE M240,128 ; move to the middle of the screen Abx,b1,b2,b3,...bx Dra characte a th curren x, positio usin th specifie characte definition The b equal th numbe o binar digit an y-axi line o th character an b throug b equal th decima valu o eac o th y-axi lines Thi comman update th curren x, position I thi sound complicated don' worry Here' a exampl t hel you Fo example A9,0,0,0,0,60,6,62,70,59 wil dra a "a o th screen I yo loo closely you'l se the "a" is not like the Starlet's. Here's what the command means. 000000000 A - start definition of 9 lines, 0 for line 1 000000000 0 for line 2 000000000 the character is 9 dots wide 0 for line 3 000000000 0 for line 4 000111100 1111 <-- 60 for line 5 000000110 11 | 6 for line 6 000111110 11111 |-- Look familiar? 62 for line 7 001000110 1 11 | 70 for line 8 000111011 111 11 <-- 59 for line 9 Usin thi approach yo ca desig you ow font o characters I you omi mov (Mx,y comman befor definin an printin th letter th letter wil b printe alon vertica axis Doe anyon ou ther wan t desig cursor-controlle fon editor Usin binar number drive m crazy. Bx,y Dra box usin diagona fro th curren x, positio t x,y I th curren x, positio were 0,0 the command B480,128 woul dra bo th siz o th screen Nic fo borders Thi command does not update the current x,y position. Cn Dra usin th specifie color wher equa fo o o fo off I you'r jus starting includ "C1 a th firs comman i you file Thi comman doe no affec th curren x, position. Dn Move dow times plottin do eac time Yo ca us thi command alon wit I G H J L R an U t dra character too bu prefe th command Thi comman update th curren x, position. Fn,x,y Dra bo fro th curren x, positio o diagona t th specifie x, position an us th specifie colo t fil th box Th color n ca b o 1 Thi comman doe no update the current x,y position. Gn Mov north ea 1400 st units plottin do alon th way Thi command updates the current x,y position. Hn Move south east n units, plottin do alon th way Thi command updates the current x,y position. In Move south west n units, plottin do alon th way Thi command updates the current x,y position. Jn Move north west n units, plottin do alon th way Thi command updates the current x,y position. K Wai fo keypres befor proceeding Don' us thi comman i yo hav XOR' th screen Th keypres wil b echoe t th scree a th curren curso (no x,y position creatin hol i you picture Thi comman i helpfu i yo ar testin portion o you dra file DRAW.CO wil wai fo keypres a th en o fil a default. Ln Mov lef units plottin do alon th way Thi comman updates the current x,y position. Mx,y Mov t specifie do position Thi comman update th curren x, position bu doe no dra lin fro th previou x, positio o plo do a th specifie position Us thi comman t mov aroun th scree an positio fo draw. Nx,y Dra lin fro th curren x, positio t th specifie x, position. This command does not update the current x,y position. Pn Dum th scree t you printer I equal 1 th printe i Tand printer I equal 2 th printe i a IB graphi printer. Rn Mov righ units plottin do alon th way Thi comman update the current x,y position. Sx,y str" Mov t specifie x, positio an prin th string Thi comman calculate th curso positio b dividin b an b 8 Fo example, S240,64 At center" wil mov th curso t characte 40 (24 divide b equal 40) an lin (6 divide b equal 8) Thi comman i no a flexibl a th command bu i faste becaus i use th Starlet' VT-10 curso positionin sequence Th curso positio i calculate b intege division s th an value wil b rounde down I yo omi th en quote th scree wil b cleare an you'l receiv a erro message Thi comman doe no updat th curren x, position bu i doe updat th current cursor position. Tx,y,r Dra circl o radiu aroun th specifie x, position Thi command updates the current x,y position. Un Mov u units plottin do alon th way Thi comman updates the current x,y position. Vx,y,r Dra fille circl o radiu aroun th specifie x, position. This command updates the current x,y position. X Thi comman XOR th screen Thi mean th blac dot wil becom whit an th whit dot wil becom black Thi comman does not affect the current x,y position. A Note About DRAW.COM Th progra doe littl error-checking s b careful o yo ma en u drawin picture of th Starlet' screen. You pictur fil i limite t abou 5,00 characters WordSta wil tel yo exactl ho larg you ASCI fil i i yo d ^Q t g t th en o th fil i th non-documen mode DRAW.CO wil exi wit a erro messag i you fil i to large kep thi siz smal s peopl withou NODE' grea Datapa ca ru th program (I yo tr t ru progra large tha 31 o th Starle whe i th 32 CP mode you'l ge "Ba Fil Load error. I yo ru ou o room tr deletin th comments Yo ca als strin severa command o eac line DRAW.CO see you progra a on lon string an load i int memor first s you comman lin ca a wid a 256 characters. Don' forge t plac th Starle i th VT-10 mod vi th OPTIO comman fro th MENU Otherwise th scree wil no b cleare whe DRAW.CO starts an escap sequence wil b echoe t th screen DRAW.CO wil rea you file dra th pictur fro you commands the wai fo keypress clea th scree and quit. Strang thing ma happe i yo tr t defin character large tha 1 dot wid wit th command or forge t inser space o delimiter wher the shoul b fo eac command I'v kep error-checkin t minimu t kee th progra small Don' b afraid to experiment though, and have fun! I yo woul lik th sourc cod t DRAW an doze othe utilitie written just for the Starlet, send $10 to: William H. Ball 4255 Ancona Court Indianapolis, IN 46236  0