Polygon (shape) Component¶

(added in version 1.78.00)

The Polygon stimulus allows you to present a wide range of regular geometric shapes. The basic control comes from setting the number of vertices:

2 vertices give a line
3 give a triangle
4 give a rectangle etc.
a large number will approximate a circle/ellipse

The size parameter takes two values. For a line only the first is used (then use ori to specify the orientation). For triangles and rectangles the size specifies the height and width as expected. Note that for pentagons upwards, however, the size determines the width/height of the ellipse on which the vertices will fall, rather than the width/height of the vertices themselves (slightly smaller typically).

Parameters¶

namestring: Everything in a PsychoPy^® experiment needs a unique name. The name should contain only letters, numbers and underscores (no punctuation marks or spaces).
start :: The time that the stimulus should first appear. See Defining the onset/duration of components for details.
stop :: Governs the duration for which the stimulus is presented. See Defining the onset/duration of components for details.
shapeline, triangle, rectangle, cross, star, regular polygon: What shape the stimulus is
num verticesint: The number of vertices for your shape (2 gives a line, 3 gives a triangle,… a large number results in a circle/ellipse). It is not (currently) possible to vary the number of vertices dynamically.

Appearance¶

How should the stimulus look? Colour, borders, etc.

fill colorcolor: See Color spaces
color spacergb, dkl, lms, hsv: See Color spaces
border colorcolor: See Color spaces
line widthint | float: How wide should the line be? Width is specified in chosen spatial units, see Units for the window and stimuli
opacity :: Vary the transparency, from 0.0 = invisible to 1.0 = opaque

Layout¶

How should the stimulus be laid out? Padding, margins, size, position, etc.

oridegrees: The orientation of the entire patch (texture and mask) in degrees.
pos[X,Y]: The position of the centre of the stimulus, in the units specified by the stimulus or window
size(width, height): Size of the stimulus on screen
spatial unitsdeg, cm, pix, norm, or inherit from window: See Units for the window and stimuli

Texture¶

Control how the stimulus handles textures.

interpolatelinear, nearest: Should textures be interpolated?
unitsdeg, cm, pix, norm, or inherit from window: See Units for the window and stimuli