Brain Imaging & Analysis Center

The “sketch” parameters are used to enable interactive drawing during a Showplay paradigm.

The Sketch parameters are:
sk_flag - main control flag

• 1 - sketching features are activated
• 2 - draw at cursor
• 4 - transform cursor position by SK_AFFINE matrix
• 8 - flip the X cursor coordinate
• 16 - flip the Y cursor coordinate
• 32 - beep if drawing in SK_IMAGE 0 region (with flag 64+128)
• 64 - check cursor positions within SK_IMAGE
• 128 - save SK_IMAGE value at cursor as SK_VAL
• 256 - draw with SK_OFFCOLOR if SK_VAL is 0

sk_tmin - minimum elapsed time before recording new cursor position
sk_dmin - minimum cursor displacement (pixels) before recording new cursor position
sk_dmax - maximum cursor displacement (pixels) for connected points; greater than this starts a new vector list
sk_wid -
sk_hgt -
sk_imagename - background template image file name
sk_rect - rectangle to constrain drawing
sk_beep - name of beep sound sk_dbeep - minimum time between beeps (ms)

All sketching operations are implemented in the real-time program module “rt_response”. Copy the original and modify it in your task folder if you want to customize sketching features.

Note: Sketch data are recorded within the “pdigm” output file, and are also saved in a “drawing.txt” file.

See Also:

CIGAL Home, CIGAL Manual, ShowPlay Home, ShowPlay Manual, InputParameters List, Manual Help