en:pixel
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en:pixel [2016/08/12 12:36] admin |
en:pixel [2020/05/27 10:02] (current) admin |
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| ==== Description ==== | ==== Description ==== | ||
| Returns the [[RGB|RGB]] value of the pixel at the [[numericexpressions|x_position]] and [[numericexpressions|y_position]] coordinate. If the pixels has not been set since the last [[clg|Clg]] command or was drawn with the color CLEAR a -1 will be returned. | Returns the [[RGB|RGB]] value of the pixel at the [[numericexpressions|x_position]] and [[numericexpressions|y_position]] coordinate. If the pixels has not been set since the last [[clg|Clg]] command or was drawn with the color CLEAR a -1 will be returned. | ||
| + | |||
| + | ==== Sample Program ==== | ||
| + | |||
| + | The following sample program shows how to use the binary and operation and integer division to extract the red, blue, and green values from the number returned by pixel. | ||
| + | |||
| + | < | ||
| + | color red | ||
| + | rect 0,0,100,100 | ||
| + | |||
| + | color rgb(100, | ||
| + | rect 100, | ||
| + | |||
| + | color white | ||
| + | rect 200, | ||
| + | |||
| + | while true | ||
| + | c = pixel(mousex, | ||
| + | r = (c & 0xff0000) \ 0x10000 | ||
| + | g = (c & 0xff00) \ 0x100 | ||
| + | b = (c & 0xff) | ||
| + | print r,g,b | ||
| + | pause .5 | ||
| + | end while | ||
| + | </ | ||
| ==== See Also ==== | ==== See Also ==== | ||
| Line 13: | Line 37: | ||
| ==== History ==== | ==== History ==== | ||
| |0.9.5m|New To Version| | |0.9.5m|New To Version| | ||
| + | |2.0.0.4|Added example| | ||
en/pixel.1471026962.txt.gz ยท Last modified: 2020/02/28 10:46 (external edit)
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