Category : Miscellaneous Language Source Code
Archive   : SPL.ZIP
Filename : IPLOT.SP

 
Output of file : IPLOT.SP contained in archive : SPL.ZIP
BEGIN

COMMENT
This program will plot a set of points in three
dimensions using the high resolution graphics. ;

REAL extent,vx,vy,topx,topy;
REAL ARRAY x(500),y(500),z(500);
INTEGER limit,i;

PROCEDURE Plotter;
BEGIN
COMMENT This procedure scales and plots the points on
the computer screen. ;

INTEGER i;
REAL maxx,maxy,minx,miny,difx,dify;

maxx := -1*10^30; maxy := maxx; minx := 1*10^30; miny := minx;
topx := 639; topy := 200;

FOR i := 1 STEP 1 UNTIL limit DO
BEGIN
IF x(i) >= maxx THEN maxx := x(i);
IF x(i) <= minx THEN minx := x(i);
IF y(i) >= maxy THEN maxy := y(i);
IF y(i) <= miny THEN miny := y(i);
END

COMMENT The maximum and minimum x and y values are computed. ;

difx := maxx-minx; dify := maxy-miny;

FOR i := 1 STEP 1 UNTIL limit DO
BEGIN
x(i) := ((x(i)-minx)/difx)*topx;
y(i) := ((y(i)-miny)/dify)*topy;
PSET(x(i),topy-y(i)),7;
END

END

PROCEDURE Convert_3D_to_2D;
BEGIN

COMMENT This procedure converts 3 dimensional coordinates to
2 dimensional coordinates. ;

REAL cosine_45,sine_45;
INTEGER i;

cosine_45 := COS((45.*3.14159)/180.);
sine_45 := SIN((45.*3.14159)/180.);

FOR i := 1 STEP 1 UNTIL limit DO
BEGIN
x(i) := x(i) + (extent-y(i))*cosine_45;
y(i) := z(i) + (extent-y(i))*sine_45;
END

END



COMMENT This is the start of the main program. ;



HOME; SCREEN 2;

Start_plot:

INPUT('Enter the scale factor:' @ extent); HOME;

OUTPUT('.... WAIT ....');

IF extent < 0 THEN GO Finish;
i:=1;
FOR vx := -1. STEP .1 UNTIL 1. DO
BEGIN
FOR vy := -1. STEP .1 UNTIL 1. DO
BEGIN
x(i) := vx; y(i) := vy; z(i) := SQR(2.-vx^2-vy^2); i := i+1;
END
END

COMMENT Points have been computed,now set up axes. ;

x(i+1) := extent; y(i+1) := 0; z(i+1) := 0;
x(i+2) := -extent; y(i+2) := 0; z(i+2) := 0;
x(i+3) := 0; y(i+3) := extent; z(i+3) := 0;
x(i+4) := 0; y(i+4) := -extent; z(i+4) := 0;
x(i+5) := 0; y(i+5) := 0; z(i+5) := extent;
x(i) := 0; y(i) := 0; z(i) := -extent;
limit := i+5;


Convert_3D_to_2D;

HOME;

Plotter;

OUTPUT( DATE$ + ' ' + TIME$ );

LINE (x(i+1),topy-y(i+1)) - (x(i+2),topy-y(i+2)),7;
LINE (x(i+3),topy-y(i+3)) - (x(i+4),topy-y(i+4)),7;
LINE (x(i),topy-y(i)) - (x(i+5),topy-y(i+5)),7;

Busy: IF INKEY$ = '' THEN GO TO Busy;
ELSE GO TO Start_plot;

Finish:
END


  3 Responses to “Category : Miscellaneous Language Source Code
Archive   : SPL.ZIP
Filename : IPLOT.SP

  1. Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

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