Your example patch works exactly as it should on OSX. <br><br><div><span class="gmail_quote">On 5/13/07, <b class="gmail_sendername">altern</b> <<a href="mailto:altern2@gmail.com">altern2@gmail.com</a>> wrote:</span>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">cyrille henry(e)k dio:<br>> hello,<br>><br>> altern a écrit :<br>>> hi<br>>>
<br>>> do you mean something like the example attached?<br>> yes, exactly.<br>><br>>> This doesnt work ok for me, the shape should be 10x10 px and is not,<br>> a [rectangle 10 10] should be 20 pixel.<br>
<br>i understand from the rectangle help that [rectangle 10 10] should be a<br>10 units width by 10 units height square. I get a rectangle which is<br>irregular, check the attached screnshot gif<br><br>>> also x and y pos are dont match with window size. Translating to 400,
<br>>> 300 should place the rect in top right corner but I get that with only<br>>> 320, 190, so the units are not mapped to pixels<br>> translating to 400 300 should move the center of the rectangle in the
<br>> top right corner.<br>> if your rectangle is 100 100, then you just have to move it 300 200 in<br>> order to have the corner of the rectangle in the corner of the gem window.<br>><br>> your patch work that way here.
<br><br>check the attachment again, the rect is 10x10 and it is located at<br>X=307, Y=167. This should be far from 400, 300 which should be the<br>top,right location. So the coordinate system is distorted, specially on<br>
the y axis<br><br>I also tried with<br>dimen 400 400<br>perspec 0 400 0 400 999 1001<br>If draw a 1 by 1 rect and i get it to the right top corner by<br>translating it 320, 320. So pixels are dont match gl units and moreover
<br>in the previous example when the gem window is not a square the<br>distortion affects differently the X and the Y axis<br><br>>><br>>> but maybe i am missing something from what you describe?<br>>><br>
>> In opengl to achieve this 2D like-pixels to units effect i would<br>>> set the perspective to be orthographical with glOrtho command, is<br>>> something like this possible in Gem?<br>> yes, insert an [ortho] after the gemhead
<br>><br>><br>> cyrille<br>><br>>><br>>> thanks!!<br>>><br>>> enrike<br>>><br>>> cyrille henry(e)k dio:<br>>>> hello,<br>>>><br>>>> i tried with :
<br>>>> dimen 400 300<br>>>> view 0 0 1000 // 1000 is in order to put the camera far from the view<br>>>> point, to reduce space distortion<br>>>> perspec 0 400 0 300 999 1001 // 999 and 1001 limit the render to
<br>>>> primitive position is between -1 and 1 (because camera is at 1000)<br>>>><br>>>><br>>>> and everything is working as expected.<br>>>> i just have 1 strange thing : i need to set the [dimen<, [create< ,
<br>>>> then [reset< and last [view< and [perspec< if i did not do a reset, a<br>>>> square is not rendered as a square but a rectangle.<br>>>><br>>>> anyway, it's working.
<br>>>><br>>>> cyrille<br>>>><br>>>><br>>>> altern a écrit :<br>>>>> i tried to pass different view values to gemwin. I can see that in<br>>>>> order to be able to specify location or with with pixels i should
<br>>>>> set view to<br>>>>> view 0 0 2<br>>>>> but as soon as i set that the shape is not there any more. This is<br>>>>> an example i am using to test. If i ser view to<br>
>>>> view 0 0 2.01<br>>>>> it is almost there but if i set it to 0 0 2 it is not there any<br>>>>> more. I guess it might be because it is either beyond the back limit<br>>>>> y or behind the camera?
<br>>>>><br>>>>> thanks<br>>>>><br>>>>> enrike<br>>>>><br>>>>><br>>>>> altern(e)k dio:<br>>>>>> hi<br>>>>>>
<br>>>>>> I am trying to map GEM units to pixels so that i can position some<br>>>>>> videos in the GEM window using pixels values. For this I understand<br>>>>>> that<br>>>>>> i must match the projection values with the window size. So i am doing
<br>>>>>><br>>>>>> dimen 400 300<br>>>>>> perspect 0 400 0 300 1 20<br>>>>>><br>>>>>> and i render all objects at z position 1<br>>>>>>
<br>>>>>> translateXYZ 100 100 1<br>>>>>><br>>>>>> However I am getting a weird result, the units are far smaller that<br>>>>>> pixels, so to move a video 100px in the x i need to change it x
<br>>>>>> position<br>>>>>> by 300 units or something like this. So I am not sure about what i am<br>>>>>> doing wrong, I am familiar with OpenGL but i never played too much<br>
>>>>> with<br>>>>>> GEM before so I am still getting into it.<br>>>>>><br>>>>>> Another small issue is that I would also like to reverse the Y so that<br>>>>>> upper left is 0,0 and bottom left would be 0,200 for example, not sure
<br>>>>>> about how to change this. I guess it is to do with the gemwin settings<br>>>>>> but i dont get it right.<br>>>>>><br>>>>>> thanks<br>>>>>>
<br>>>>>> enrike<br>>>>>><br>>>>>><br>>>>><br>>>>><br>>>>> _______________________________________________<br>>>>> <a href="mailto:PD-list@iem.at">
PD-list@iem.at</a> mailing list<br>>>>> UNSUBSCRIBE and account-management -><br>>>>> <a href="http://lists.puredata.info/listinfo/pd-list">http://lists.puredata.info/listinfo/pd-list</a><br>>>>>
<br>>>>><br>>>><br>>><br>>><br>>><br>>> ------------------------------------------------------------------------<br>>><br>>> #N canvas 393 156 429 320 10;<br>>> #X obj 84 210 gemwin;
<br>>> #X obj 245 163 gemhead;<br>>> #X msg 173 82 create \, 1;<br>>> #X msg 293 106 0 \, destroy;<br>>> #X floatatom 309 164 5 0 0 0 - - -;<br>>> #X floatatom 347 164 5 0 0 0 - - -;<br>>> #X floatatom 288 215 5 0 0 0 - - -;
<br>>> #X floatatom 332 215 5 0 0 0 - - -;<br>>> #X obj 245 190 translateXYZ 10 10 1;<br>>> #X msg 215 50 dimen 400 300;<br>>> #X msg 48 73 view 0 0 1000;<br>>> #X msg 9 48 perspec 0 400 0 300 999 1001;
<br>>> #X msg 110 99 reset;<br>>> #X obj 50 -8 bng 15 250 50 0 empty empty empty 0 -6 0 10 -262144 -1<br>>> -1;<br>>> #X obj 50 13 t b b b b b;<br>>> #X obj 245 234 rectangle 10 10;<br>>> #X connect 1 0 8 0;
<br>>> #X connect 2 0 0 0;<br>>> #X connect 3 0 0 0;<br>>> #X connect 4 0 8 1;<br>>> #X connect 5 0 8 2;<br>>> #X connect 6 0 15 1;<br>>> #X connect 7 0 15 2;<br>>> #X connect 8 0 15 0;
<br>>> #X connect 9 0 0 0;<br>>> #X connect 10 0 0 0;<br>>> #X connect 11 0 0 0;<br>>> #X connect 12 0 0 0;<br>>> #X connect 13 0 14 0;<br>>> #X connect 14 0 11 0;<br>>> #X connect 14 1 10 0;
<br>>> #X connect 14 2 12 0;<br>>> #X connect 14 3 2 0;<br>>> #X connect 14 4 9 0;<br>>><br>><br><br><br>_______________________________________________<br><a href="mailto:PD-list@iem.at">PD-list@iem.at
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