Some calculator art done this week:

Eye Parametric Pattern

HP Prime:

App: Parametric

Range: Autoscale, -2.85349369234 ≤ T ≤ 2.85349369234

Equations:

X1(T) = T

Y1(T) = -0.1736934*T^2 + 1.4142857

X2(T) = T

Y2(T) = -0.1736934*T^2 - 0.587143

X3(T) = T

Y3(T) = -Y1(T)

X4(T) = T

Y4(T) = -Y2(T)

X5(T) = 0.1736934*T^2 - 1.4142857

Y5(T) = T

X6(T) = -X5(T)

Y6(T) = T

X7(T) = 0.17356934*T^2 + 0.5857143

Y7(T) = T

X8(T) = -X7(T)

Y8(T) = T

Hilly Yard

HP Prime

App: Parametric

Range: -2 π ≤ T ≤ 2 π , Radians Mode

Equations:

X1(T) = T

Y1(T) = PIECEWISE(-2 π ≤ T < -1.5 π, 2T/π + 4,

-1.5 π ≤ T < -0.5 π , -2T/π - 2,

-0.5 π ≤ T < 0.5 π, 2T/π,

0.5 π ≤ T < 1.5 π, -2T/π + 2,

1.5 π ≤ T ≤ 2 π, 2T/π -4)

Color: Orange

X2(T) = T

Y2(T) = sin T

Color: blue

X3(T) = PIECEWISE(-1 ≤ T ≤ 1, -π/2)

Y3(T) = PIECEWISE(-1 ≤ T ≤ 1, T)

Color: Green

X4(T) = PIECEWISE(-π/2 ≤ T ≤ π/2, T)

Y4(T) = PIECEWISE(-π/2 ≤ T ≤ π/2, T/π + 3/2)

Color: Green

X5(T) = 0.15 cos T + π/2

Y5(T) = 0.15 sin T + 2

Color: Red

X6(T) = cos(27*T) sin T + π/2

Y6(T) = cos(27*T) cos T + 2

Color: Red.

The Shield

Casio Prizm

Mode: Graphing

Window:

X = [-3.5, 3.5], Y = [-0.1, 4.5], Range: -2 ≤ T ≤ 2

Equations (Shield):

X1(T) = T

Y1(T) = -0.3125 T^2 + 4.25

X2(T) = T

Y2(T) = 3 T^2 ÷ 4

X3(T) = T

Y3(T) = -0.125 T^2 + 3.5

The arrow was drawn with the FreeLine command.

Flowers

HP Prime:

App: Advanced Graphing

Radians Mode, Autoscale

Equations:

V1: √(X^2 + Y^2) ≤ 2 cos (24 atan(Y/X))

Color: Red

V2: √(X^2 + Y^2) ≤ 2.5 cos (4 atan(Y/X))

Color: Green

V3: √(X^2 + Y^2) ≤ 2.5 cos (4 (atan(Y/X) - π/4)

Color: Green.

Circlegraph

Casio Prizm

Program:

PROGRAM DRAWCIR

Cls

-10 →Xmin

10 → Xmax

-10 → Ymin

10 → Ymax

For 0 → I To 2 π Step π ÷ 8

Plot/Line Color Blue

Circle 5 cos I, 5 sin I, 2

Plot/Line Color Green

Circle 5 cos I, 5 sin I, 1

Next

Plot/Line Color Yellow

Circle 0,0,5

This blog is property of Edward Shore. 2014

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