altern a écrit :
hi
just tested it under linux and it does work,
test2 or test3 work?
cyrille
so this seems to be either a windows issue or my laptop graphics card. any ideas?
enrike
cyrille henry(e)k dio:
hello,
altern a écrit :
hi
do you mean something like the example attached?
yes, exactly.
This doesnt work ok for me, the shape should be 10x10 px and is not,
a [rectangle 10 10] should be 20 pixel.
also x and y pos are dont match with window size. Translating to 400, 300 should place the rect in top right corner but I get that with only 320, 190, so the units are not mapped to pixels
translating to 400 300 should move the center of the rectangle in the top right corner. if your rectangle is 100 100, then you just have to move it 300 200 in order to have the corner of the rectangle in the corner of the gem window.
your patch work that way here.
but maybe i am missing something from what you describe?
In opengl to achieve this 2D like-pixels to units effect i would set the perspective to be orthographical with glOrtho command, is something like this possible in Gem?
yes, insert an [ortho] after the gemhead
cyrille
thanks!!
enrike
cyrille henry(e)k dio:
hello,
i tried with : dimen 400 300 view 0 0 1000 // 1000 is in order to put the camera far from the view point, to reduce space distortion perspec 0 400 0 300 999 1001 // 999 and 1001 limit the render to primitive position is between -1 and 1 (because camera is at 1000)
and everything is working as expected. i just have 1 strange thing : i need to set the [dimen<, [create< , then [reset< and last [view< and [perspec< if i did not do a reset, a square is not rendered as a square but a rectangle.
anyway, it's working.
cyrille
altern a écrit :
i tried to pass different view values to gemwin. I can see that in order to be able to specify location or with with pixels i should set view to view 0 0 2 but as soon as i set that the shape is not there any more. This is an example i am using to test. If i ser view to view 0 0 2.01 it is almost there but if i set it to 0 0 2 it is not there any more. I guess it might be because it is either beyond the back limit y or behind the camera?
thanks
enrike
altern(e)k dio:
hi
I am trying to map GEM units to pixels so that i can position some videos in the GEM window using pixels values. For this I understand that i must match the projection values with the window size. So i am doing
dimen 400 300 perspect 0 400 0 300 1 20
and i render all objects at z position 1
translateXYZ 100 100 1
However I am getting a weird result, the units are far smaller that pixels, so to move a video 100px in the x i need to change it x position by 300 units or something like this. So I am not sure about what i am doing wrong, I am familiar with OpenGL but i never played too much with GEM before so I am still getting into it.
Another small issue is that I would also like to reverse the Y so that upper left is 0,0 and bottom left would be 0,200 for example, not sure about how to change this. I guess it is to do with the gemwin settings but i dont get it right.
thanks
enrike
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#N canvas 393 156 429 320 10; #X obj 84 210 gemwin; #X obj 245 163 gemhead; #X msg 173 82 create , 1; #X msg 293 106 0 , destroy; #X floatatom 309 164 5 0 0 0 - - -; #X floatatom 347 164 5 0 0 0 - - -; #X floatatom 288 215 5 0 0 0 - - -; #X floatatom 332 215 5 0 0 0 - - -; #X obj 245 190 translateXYZ 10 10 1; #X msg 215 50 dimen 400 300; #X msg 48 73 view 0 0 1000; #X msg 9 48 perspec 0 400 0 300 999 1001; #X msg 110 99 reset; #X obj 50 -8 bng 15 250 50 0 empty empty empty 0 -6 0 10 -262144 -1 -1; #X obj 50 13 t b b b b b; #X obj 245 234 rectangle 10 10; #X connect 1 0 8 0; #X connect 2 0 0 0; #X connect 3 0 0 0; #X connect 4 0 8 1; #X connect 5 0 8 2; #X connect 6 0 15 1; #X connect 7 0 15 2; #X connect 8 0 15 0; #X connect 9 0 0 0; #X connect 10 0 0 0; #X connect 11 0 0 0; #X connect 12 0 0 0; #X connect 13 0 14 0; #X connect 14 0 11 0; #X connect 14 1 10 0; #X connect 14 2 12 0; #X connect 14 3 2 0; #X connect 14 4 9 0;
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