Grafica

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Grafica - DXT 4109

Questo programma consente la rappresentazione grafica
dei dati inseriti, sotto forma di diagrammi a barre e a torta.
Oltre a ciò potete disegnare sul video funzioni a due e tre
dimensioni. I valori della funzione e la relativa derivata
prima in vari punti del grafico possono essere evidenziati
per mezzo del Joystick.

Developer: Original developer of the US release (CX4109): Lane Winner (uncredited) / Howard D. Siebenrock
According to source code (REM at line 0) (see below), it’s exactly the same rev numbers than the german release « Graph It aka Graph IT II aka Graph IT Enhanced – TXG 9517 »

Crédits :
Loading screen : 0 REM ENHANCED BY HOWARD SIEBENROCK REV 1.2 10-30-81
Bar : 0 REM GRAPH IT BAR-PIE REV 0.1 7-5-80 ENHANCED BY HOWARD SIEBENROCK REV. 1.3 11.13.81
Graph XY :  0 REM GRAPH.XY ENHANCMENTS BY HOWARD SIEBENROCK REV 1.3 11-13-81 (Yes, including the typo at « ENHANCMENTS » ! 😉 – same typo in the german release)
Polar : 0 REM GRAPH POL:REV 0.3 9-25-80 ENHANCED BY HOWARD SIEBENROCK VES. 1.3 11-14-81
3D : 0 REM 3D REV. 0.1 8-15-80 ENHANCED BY HOWARD SIEBENROCK REV 1.3 11-15-81

Date: 1984 according to cover, 1981 according to source code, no date on the booklet.
Distributed by: ATARI International (Italy) Inc. V.le della Liberazione, 18 – 20124 Milano
Dump:  Download – Source Atarinside – .Pro format (with protection log).
Notes: Translation and enhancement of « Graph IT » – CX4109 – USA.
How to run:  Load .PRO in your emulator (Altirra), boot without « Option » key. Enable Disk SIO Patch and Fast FP Math if you don’t want to wait.
Other translations :
USA: « Enhancements to Graph It » – APX 20074 – 1982
Germany: Graph It aka Graph IT II aka Graph IT Enhanced – TXG 9517
Atariwiki reports that another release was also made for Germany with a different source code of « GRAPH IT BAR-PIE » in 1982.

Rendering comparison (« Grafica 3D ») :

1 – Heart
Atari Formula : 5+​(‑sqr(​1-​x^​2-​(y-​abs(​x))^​2))*​cos(​30*​(1-​x^​2-​(y-​abs(​x))^​2))
Google Formula : 5 + (-sqrt(1-x^2-(y-abs(x))^2))*cos(30*((1-x^2-(y-abs(x))^2))), x is from -1 to 1, y is from -1 to 1.5, z is from 1 to 6

  

2 – Water drop
Atari Formula : sqr(x*x+y*y)+3*cos(sqr(x*x+y*y))+5
Google Formula : sqrt(x*x+y*y)+3*cos(sqrt(x*x+y*y))+5 from -20 to 20

 

3 – Egg
Atari Formula : 1.2+(sqr(1-(sqr(x^2+y^2))^2)+1–x^2-y^2)*(sin(10*(x*3+y/5+7))+1/4)
Google Formula : 1.2+(sqrt(1-(sqrt(x^2+y^2))^2)+1–x^2-y^2)*(sin(10*(x*3+y/5+7))+1/4) from -1.6 to 1.6

 

4 – Wheel

Atari Formula : (0.4^2-(0.6-(x^2+y^2)^0.5)^2)^0.5
Google Formula : (0.4^2-(0.6-(x^2+y^2)^0.5)^2)^0.5

 

5 – Pyramid

Atari Formula : 1-abs(x+y)-abs(y-x)
Google Formula : 1-abs(x+y)-abs(y-x)

 

6 – Waves

Atari Formula : x*sin(-(x*x)-(y*y))
Google Formula : x*sin(-(x*x)-(y*y)) from -5 to 5

 

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