View source: R/opiKineticStimulus.r
opiKineticStimulus | R Documentation |
List containing stimulus parameters with an S3 class attribute
of opiKineticStimulus
"See details"
The list should be of class opiKineticStimulus and contain the following elements.
path
list of (x,y) coordinates in degrees that is usable by xy.coords()
image
image[i]
is the image to display (in a machine specific format) in the section of the path specified by path[i]..path[i+1]
.
levels
if is.na(image)
then levels[i]
is the stimulus level in cd/\mbox{m}^2
in the section of the path specified by path[i]..path[i+1]
sizes
sizes[i]
is the size of stimulus (diameter in degrees) to use for the section of path specified by path[i]..path[i+1]
, or a scaling factor for images[i]
.
colors
colors[i]
is the color to use for the stimulus in the section of path specified by path[i]..path[i+1]
. Ignored if !is.na(image).
speeds
speeds[i]
is the speed (degrees per second) for the stimulus to traverse the path specified by path[i]..path[i+1]
.
...
machine specific parameters
x
and y
are in degrees, with precision to three decimal places
recognised.
image
is not possible on an Octopus 900.
levels
are in cd/\mbox{m}^2
, and are rounded to the nearest
one tenth of a dB for display.
colors
are ignored. Use opiSetBackground()
to alter stimulus color.
sizes
are in degrees, but are rounded to the nearest Goldmann Size I..V
for display.
Only a simple path with a start and an end point is supported by the AP-7000.
x
and y
are in degrees and should only be length 2. (precision?)
image
is not possible on an Kowa AP 7000.
levels
are in cd/\mbox{m}^2
in the range 0.03 to 3183, and are
rounded to the nearest one tenth of a dB for display. (precision?)
colors
one of .OpiEnv$KowaAP7000$COLOR_WHITE
,
.OpiEnv$KowaAP7000$COLOR_GREEN
, .OpiEnv$KowaAP7000$COLOR_BLUE
, and
.OpiEnv$KowaAP7000$COLOR_RED
.
sizes
are in degrees, but are rounded to the nearest Goldmann Size I..V
for display.
speeds
are in degrees per second in the range 3 to 5.
Not implemented.
opiSetBackground
, opiStaticStimulus
,
opiTemporalStimulus
# A Size III white kinetic stimuli on a bilinear path {(27,27), (15,20), (0,0)}
stim <- list(path=list(x=c(27,15,0), y=c(27,20,0)),
izes=rep(0.43,2),
colors=rep("white",2),
levels=rep(318,2),
speeds=c(4,3))
class(stim) <- "opiKineticStimulus"
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