Hp Prime Graphing Wireless Calculator Instrukcja Użytkownika Pobierz pdf (Strona 291)

Programming in HP PPL 287

TRIANGLE_P

TRIANGLE Syntax: TRIANGLE_P([G], x1, y1, x2, y2, x3, y3, c1,

[c2, c3], [Alpha], ["ZString", z1, z2, z3])

TRIANGLE_P([G], {x1, y1, [c1], [z1]}, {x2, y2,

[c2], [z2]},{x3, y3, [c3], [z3]}, ["ZString"])

TRIANGLE_P([G],points_definition,

triangle_definitions, rotation_matrix or

{rotation_matrix or -1, ["N"], [{eye_x, eye_y,

eye_z} or -1], [{3Dxmin, 3Dxmax, 3Dymin,

3Dymax, 3Dzmin, 3Dzmax}]}, [zstring])

TRIANGLE_P([G],pre_rotated_points,

triangle_definitions, [zstring])

TRIANGLE_P([G])

The basic form of TRIANGLE draws one triangle between

the specified pixel coordinates in the graphic using the

specified color and transparency (0 ≤ Alpha ≤ 255). If

three colors are specified, it blends the colors in between

the vertices.

The advanced form of TRIANGLE_P allows multiple

triangles to be rendered at the same time with a potential

3D transformation of the triangles’ vertices.

This is mostly used if you have a set of vertices and

triangles and want to display them all at once (faster).

points_definition is either a list or a matrix of point

definition. Each point is defined by two to four numbers:

x, y, z, and color. A valid point definition can have

multiple forms. Here are a couple of example: [x, y, z, c],

{x, y, z, c}, {x, y, #c}, {(x, y), c}, (x,y)... You can use a

vector of points instead of a list; in this case, the points can

be expressed as complex numbers.

triangle_ definitions is either a list or a matrix of triangle

definitions. Each triangle is defined by three to five

numbers: p1, p2, p3, color and alpha. p1, p2 and p3 are

the index in the points_definition of the 3 points that

define the triangle. Color is used to override the per point

color definition. If you need to provide an Alpha, but not

a color, use -1 for the color.

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Hp Prime Graphing Wireless Calculator Instrukcja Użytkownika Strona 291