Property	Value
Hex Value	`$13`
Categories	Catalog > P Drawing > Commands
Localizations	FR: `pxl-Test(`

`pxl-Test(`

Overview

Returns 1 if pixel (row, column) is on, 0 if it is off;

Availability: Token available everywhere.

Syntax

pxl-Test(row,column)

Arguments

Name	Type	Optional
row
column

Location

2nd, draw, POINTS, 7:pxl-Test(

Description

The pxl-Test( command is used to test a pixel at the given (Y,X) coordinates of the graph screen, to see whether it is on or off. One is returned if the pixel is on and zero is returned if the pixel is off. Please note that the coordinates are switched around so that the row comes first and then the column — it's (Y,X) instead of (X,Y). This command's coordinates are independent of the window settings.

You can store the result of pxl-Test( to a variable for later use, or use the command in a conditional or loop.

:Pxl-On(25,25
:If pxl-Test(25,25
:Disp "Pixel turned on!

Error Conditions

ERR:DOMAIN is triggered if the coordinates are not whole numbers or not in the right range ([0..62] for row, [0..94] for column). These bounds are also affected by split screen mode (Horiz)

Source: parts of this page were written by the following TI|BD contributors: Battlesquid, burr, DarkerLine, GoVegan.

History

Calculator	OS Version	Description
TI-82	1.0	Added

Authors: Adrien Bertrand

pxl-Test(