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Topic: z-coordinates (Read 573 times) |
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meltphace
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z-coordinates
« on: Aug 20th, 2003, 3:07am » |
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when i run that piece of code,
the lines at the screen don't mean anything :
//---------------------------------------
void setup() {
size(200,200);
background(0);
}
void loop() {
stroke(255);
line(0,0,0, 0,0,500);
line(50,0,0, 50,0,1000);
}
//-------------------------------------------
...and if i just inverse the z-coordinates, then
it yields a correct drawing :
//-------------------------------------------
void setup() {
size(200,200);
background(0);
}
void loop() {
stroke(255);
line(0,0,0, 0,0,-500);
line(50,0,0, 50,0,-1000);
}
//-------------------------------------
is it normal ?
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benelek
 
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Re: z-coordinates
« Reply #1 on: Aug 21st, 2003, 2:05am » |
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the lines not being drawn seem to be given a z-value behind the camera... so they are outside the field of view.
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meltphace
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Re: z-coordinates
« Reply #2 on: Aug 22nd, 2003, 3:20pm » |
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line(0,0,0, 0,0,500);
line(50,0,0, 50,0,1000);
(this example gives shitty results)
the coordinates are all positive.
so they are not behind the camera.
am i wrong ?
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meltphace
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Re: z-coordinates
« Reply #4 on: Aug 25th, 2003, 3:49pm » |
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ok. so i'm very sorry.
in my mind it was clear that z coordinates was
always positive.
thanks for the info.
...and i won't ask questions like that in the
"software bugs" sections anymore. 
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fry
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Re: z-coordinates
« Reply #5 on: Aug 25th, 2003, 6:23pm » |
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on Aug 25th, 2003, 3:49pm, meltphace wrote:...and i won't ask questions like that in the
"software bugs" sections anymore. |
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heh, don't worry about it.. the distinction between bugs and confusing but proper implementation can be vague in programming, but worse with the current state of the Processing release.
so i won't get uppity until the legitimate traffic on the bugs section of the site slows down 
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