how many bits in this?

Code:

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  GLubyte mask[] = {
    0x0, 0x0, 0x0, 0x0,
    0x0, 0x0, 0x0, 0x0,
    0x0, 0x0, 0x0, 0x0,
    0x0, 0x0, 0x0, 0x0,
    0x0, 0x0, 0x0, 0x0,
    0x0, 0x0, 0x0, 0x0,
    0x0, 0x0, 0x0, 0x0,
    0x0, 0x0, 0x0, 0x0,
    0x0, 0x0, 0x0, 0x0,
    0x7, 0xFF, 0xF0, 0x0,
    0x1F, 0xE0, 0x1E, 0x0,
    0x7E, 0x20, 0x01, 0x0,
    0x7F, 0x39, 0xAB, 0x6F,
    0xFC, 0xA6, 0xAB, 0x6F,
    0xF8, 0x66, 0x6E, 0xEC,
    0xF8, 0x6A, 0x2A, 0x6C,
    0xFC, 0x80, 0x02, 0x2C,
    0x7F, 0x0, 0x1, 0xC8,
    0x7F, 0x0, 0x1, 0xC8,
    0x1F, 0xC0, 0x0C, 0x0,
    0x07, 0xFF, 0xF0, 0x0,
    0x03, 0xFF, 0xE0, 0x0,
    0x0, 0x1C, 0x0, 0x0,
    0x0, 0x0, 0x0, 0x0,
    0x0, 0x0, 0x0, 0x0,
    0x0, 0x0, 0x0, 0x0,
    0x0, 0x0, 0x0, 0x0,
    0x0, 0x0, 0x0, 0x0,
    0x0, 0x0, 0x0, 0x0,
    0x0, 0x0, 0x0, 0x0,
    0x0, 0x0, 0x0, 0x0,
    0x0, 0x0, 0x0, 0x0
  };

---

Count it up yourself. Take all the ones with 2 hex digits and multiple them by 16, then take the single digit ones and multiply them by 8.

Edit: Or was this supposed to be a trick question? :(

Quote:

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Originally posted by stovellp
Count it up yourself. Take all the ones with 2 hex digits and multiple them by 16, then take the single digit ones and multiply them by 8.

Edit: Or was this supposed to be a trick question? :(

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No it wasn't a trick question, I am just trying to figure how tou make patterns.......this is supposed to be a 16 bit array, but it doesn't add up the way you're telling me. The function definitions takes 16 bits , but I don't see how this is 16 bits.

This i think is a 32 by 32 bits array.

each line is 32 bits;

0x0, 0x0, 0x0, 0x0, = 0x00, 0x00, 0x00, 0x00,

each 0x00 = 8 bits or 2 words
8 * 4 = 32 .

Quote:

---

Originally posted by SAMSAM
This i think is a 32 by 32 bits array.

each line is 32 bits;

0x0, 0x0, 0x0, 0x0, = 0x00, 0x00, 0x00, 0x00,

each 0x00 = 8 bits or 2 words
8 * 4 = 32 .

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Then how is it possible to pass this to a function which is waiting for some 16 bits?


//EDIT: sometime later



ahh I see why............

glPolygonStipple() This takes in a 32*32 array, it's a different function.


And 0x1E is 8 bits or 00011110 * 4 of these would equal our 32
times 32 columms then we have our 32*32 mask.......

And 0x3F07 would be an example for function
void glLineStipple(GLint factor, GLushort pattern);
So this would take in the 16 bits for this function........


//whoa 3 a.m. mabe I should hit the sack now.......again people please correct me if I am wrong.

One more question...........

example 0011111100000111

is a pixel drawn everytime it encounters a zero? Everytime it encounters one? Which one makes a pixel to be drawn.

"is a pixel drawn everytime it encounters a zero? Everytime it encounters one? Which one makes a pixel to be drawn"



1 sets the pixel.
0 doesnt.

but in monochrom bitmaps (win API) the opposit is true.



cheers!