Tiger12506 wrote: > You know the height and the width of the image, no? > > So you know that every 'width' number of pixels will start a new row. > So if you wanted say the fifth row down, second pixel, how would you find > it? > > The 1st line: 'width' number of pixels > The 2nd line: 'width' number of pixels > The 3rd line: 'width number of pixels > The 4th line: 'width' number of pixels > The 5th line: 2 pixels in from the left > > Add those up ~ width+width+width+width+2 > Or 4*width+2 > if you start counting at the 0th row and 0th column, this will give you the 4th row and 2nd column. if you're counting from the 1st row and 1st column, this will give you the 5th row and 3rd column. > That number is the index to use to get the pixel at coords (2,5) > So this is actually (3,5) or, to count from 0, (2,4). But yeah, the general idea is there. If my math is wrong I'm sure you won't hesitate to correct me ;) -Luke
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