Re: [PD] Gem - how to get a concave/convex plane
Jack wrote: Hello, See the new version attached to use a texture. thanks a bunch, jack ! you're a hero ! (still trying to figure out the shader language magic ...) that's fantastic ! now (with cyrill's method and yours) i got two working solutions for my problem :-) hugs & kisses ! oliver ___ Pd-list@lists.iem.at mailing list UNSUBSCRIBE and account-management -> https://lists.puredata.info/listinfo/pd-list
Re: [PD] Gem - how to get a concave/convex plane
Hello,
See the new version attached to use a texture.
++
Jack
Le 05/08/2018 à 01:28, oliver a écrit :
> cyrille henry wrote:
>> hello,
>>
>> you can try [curve3d]
>
> cyrille, jack: thanks a lot for your kind help.
>
> i tried both your suggestions with some success , but i'm not quite
> there yet.
>
>
>
> i attached an example patch providing both methods and problems.
>
>
> basically [curve3d] works well, with a minor issue that can be worked
> around. though i don't understand why it's there.
>
> the issue is that the applied texture is rotated by 90°. i tried several
> things to correct it ([pix_flip], [pix_coordinate]) but they all messed
> up the texture.
>
>
>
> the vertex-shader approach of jack produces the shape i was looking for,
> but unfortunately doesn't allow texture mapping. or at least i wasn't
> able to figure out how to do it.
>
> thanks for any further thoughts ...
>
> best
>
> oliver
>
>
> ___
> Pd-list@lists.iem.at mailing list
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> https://lists.puredata.info/listinfo/pd-list
>
mesh_deformation.pd
Description: application/extension-pd
uniform sampler2D tex0;
varying vec4 vertColor;
void main() {
vec4 image = texture2D(tex0, gl_TexCoord[0].st);
gl_FragColor = image * vertColor;
}#define PI 3.1415926535897932384626433832795
uniform float deformation;
varying vec4 vertColor;
void main() {
vertColor = gl_Color;
gl_TexCoord[0] = gl_MultiTexCoord0;
vec4 pos_vertex = gl_Vertex;
float add_y = cos(pos_vertex.x * PI * 0.5) * deformation * pos_vertex.y;
pos_vertex.y += add_y;
gl_Position = gl_ModelViewProjectionMatrix * pos_vertex;
}___
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Re: [PD] Gem - how to get a concave/convex plane
>> basically [curve3d] works well, with a minor issue that can be worked >around. though i don't understand why it's there. >Certainlly because I made a mistake with S T coordinate when I code >this object, and you are the 1st one to notice it. >I don't know if it's a bug that should be corrected, or a bug that is >there for so long that it should stay for compatibility. >anyway, the workaround is easy. > Indeed, and yes i too think compatibility is important. A suggestion for a possible Future release: maybe you could add something like a "flip_texture" or "tex_coordinate" function to [curve3d]. (would be a great Feature anyway ;-)) Best Oliver ___ Pd-list@lists.iem.at mailing list UNSUBSCRIBE and account-management -> https://lists.puredata.info/listinfo/pd-list
Re: [PD] Gem - how to get a concave/convex plane
Le 05/08/2018 à 01:28, oliver a écrit : cyrille henry wrote: hello, you can try [curve3d] cyrille, jack: thanks a lot for your kind help. i tried both your suggestions with some success , but i'm not quite there yet. i attached an example patch providing both methods and problems. basically [curve3d] works well, with a minor issue that can be worked around. though i don't understand why it's there. Certainlly because I made a mistake with S T coordinate when I code this object, and you are the 1st one to notice it. I don't know if it's a bug that should be corrected, or a bug that is there for so long that it should stay for compatibility. anyway, the workaround is easy. best c the issue is that the applied texture is rotated by 90°. i tried several things to correct it ([pix_flip], [pix_coordinate]) but they all messed up the texture. the vertex-shader approach of jack produces the shape i was looking for, but unfortunately doesn't allow texture mapping. or at least i wasn't able to figure out how to do it. thanks for any further thoughts ... best oliver ___ Pd-list@lists.iem.at mailing list UNSUBSCRIBE and account-management -> https://lists.puredata.info/listinfo/pd-list ___ Pd-list@lists.iem.at mailing list UNSUBSCRIBE and account-management -> https://lists.puredata.info/listinfo/pd-list
Re: [PD] Gem - how to get a concave/convex plane
cyrille henry wrote: hello, you can try [curve3d] cyrille, jack: thanks a lot for your kind help. i tried both your suggestions with some success , but i'm not quite there yet. i attached an example patch providing both methods and problems. basically [curve3d] works well, with a minor issue that can be worked around. though i don't understand why it's there. the issue is that the applied texture is rotated by 90°. i tried several things to correct it ([pix_flip], [pix_coordinate]) but they all messed up the texture. the vertex-shader approach of jack produces the shape i was looking for, but unfortunately doesn't allow texture mapping. or at least i wasn't able to figure out how to do it. thanks for any further thoughts ... best oliver #N canvas 516 50 834 744 10; #X declare -lib Gem -path Gem; #X obj 8 11 cnv 15 100 60 empty empty empty 20 12 0 14 -228856 -66577 0; #N canvas 24 469 455 304 gemwin 0; #X obj 132 182 gemwin; #X obj 67 89 outlet; #X obj 67 10 inlet; #X obj 67 41 route create; #X msg 67 70 set destroy; #X msg 142 68 set create; #X msg 198 112 destroy; #X msg 132 112 create \, 1; #X obj 294 56 gemhead; #X obj 294 80 world_light; #X obj 207 134 loadbang; #X obj 292 20 tgl 15 0 empty empty empty 17 7 0 10 -262144 -1 -1 0 1; #X msg 207 155 lighting 1; #X obj 173 25 loadbang; #X connect 2 0 3 0; #X connect 3 0 4 0; #X connect 3 0 7 0; #X connect 3 1 5 0; #X connect 3 1 6 0; #X connect 4 0 1 0; #X connect 5 0 1 0; #X connect 6 0 0 0; #X connect 7 0 0 0; #X connect 8 0 9 0; #X connect 10 0 12 0; #X connect 11 0 8 0; #X connect 12 0 0 0; #X connect 13 0 5 0; #X restore 24 48 pd gemwin; #X msg 24 29 destroy; #X text 20 8 Create window:; #X obj 126 10 loadbang; #X msg 126 31 open Gem/examples/data/temp2.JPG, f 33; #X obj 126 52 s img; #X obj 8 87 cnv 15 400 330 empty empty CYRILLE'S_METHOD: 120 12 0 16 -204786 -66577 0; #X obj 144 383 curve3d 3 3; #X obj 144 252 pix_texture; #X obj 154 359 r curve3d_1; #X obj 144 228 pix_image; #X obj 158 203 r img; #X obj 144 285 translateXYZ 0 2.5 0, f 13; #X obj 22 179 gemhead 100; #X obj 22 228 pix_image; #X obj 36 203 r img; #X obj 22 285 translateXYZ -2.5 2.5 0, f 13; #X obj 22 383 square 1; #X obj 22 252 pix_texture; #X obj 144 179 gemhead 90; #X obj 283 383 curve3d 3 3; #X obj 283 252 pix_texture; #X obj 283 228 pix_image; #X obj 297 203 r img; #X obj 293 359 r curve3d_2; #X obj 283 179 gemhead 80; #X obj 283 285 translateXYZ 2.5 2.5 0, f 13; #X obj 283 329 rotateXYZ 0 0 90; #X text 31 127 Original Image on Square:, f 9; #X text 125 126 Image on desired shape \, but it's rotated 90° CW. Why ?, f 21; #X text 281 115 Workaround: Modified Shape and finally rotated by 90° , f 15; #X obj 216 104 cnv 4 100 4 empty empty empty 170 12 0 16 -204786 -66577 0; #X obj 8 418 cnv 15 400 300 empty empty empty 170 12 0 16 -159655 -66577 0; #X msg 21 536 set 0 2 1 1 0; #X msg 21 620 set 2 0 -1 -1 0; #X msg 21 654 set 2 2 1 -1 0; #X msg 21 577 set 1 1 0 0 0; #X msg 21 560 set 1 0 -1 0 0; #X msg 21 594 set 1 2 1 0 0; #X msg 21 502 set 0 0 -1 1 0; #X msg 21 637 set 2 1 0 -0.5 0; #X msg 21 519 set 0 1 0 0.5 0; #X obj 21 433 loadbang; #X text 70 450 this is the shape i want:, f 13; #X obj 21 680 s curve3d_1; #X text 237 434 SHAPE 2:; #X text 80 433 SHAPE 1:; #X text 221 451 this is how i have to modify Shape 1 because of the 90° rotation., f 23; #X obj 409 87 cnv 15 400 630 empty empty JACK'S_METHOD: 120 12 0 16 -220544 -66577 0; #X obj 560 105 cnv 4 100 4 empty empty empty 120 12 0 16 -220544 -66577 0; #X obj 647 13 declare -lib Gem -path Gem; #X obj 438 222 glsl_vertex; #X obj 438 277 glsl_fragment; #X obj 438 418 glsl_program; #X msg 501 349 link \$1 \$2; #X obj 513 300 t b f; #X obj 501 326 pack; #X obj 525 173 loadbang; #X msg 525 205 open vertex.vert; #X msg 525 260 open vertex.frag; #X msg 528 401 deformation \$1; #X obj 531 382 hsl 70 15 -0.5 0.5 0 0 empty empty empty -2 -8 0 10 -262144 -1 -1 0 1; #X obj 438 460 mesh_square 50 50; #X obj 438 184 gemhead 70; #X obj 660 222 glsl_vertex; #X obj 660 277 glsl_fragment; #X obj 660 418 glsl_program; #X obj 660 576 mesh_square 50 50; #X obj 660 184 gemhead 60; #X msg 723 348 link \$1 \$2; #X obj 735 299 t b f; #X obj 723 325 pack; #X obj 660 539 translateXYZ 0 -2.5 0, f 13; #X obj 660 514 pix_texture; #X obj 660 490 pix_image; #X obj 674 465 r img; #X text 425 118 works perfectly well on it's own:, f 17; #X text 648 116 but a texture can not be applied upon the mesh_square ..., f 19; #X msg 21 455 bang; #X msg 179 536 set 0 2 1 1 0; #X msg 179 620 set 2 0 -1 -1 0; #X msg 179 654 set 2 2 1 -1 0; #X msg 179 577 set 1 1 0 0 0; #X msg 179 502 set 0 0 -1 1 0; #X obj 179 433 loadbang; #X msg 179 455 bang; #X obj 179 680 s curve3d_2; #X msg 179 519 set 0 1 0 1 0; #X msg 179 637 set 2 1 0 -1 0; #X msg 179 560 set 1 0 -0.5 0 0; #X msg 179 594 set 1 2 0.5 0 0; #X text 438 627 Do the shader files need to be adapted to allow for texture mapping
Re: [PD] Gem - how to get a concave/convex plane
hello, you can try [curve3d] cheers c Le 04/08/2018 à 11:20, oliver a écrit : Jack wrote: For me, the simplest way to achieve this, is to use a mesh square with shaders. Take a look at exemples in Gem and shaders and how to move vertices in model view. Hi, Jack ! thanks a lot for your suggestion. Unfortunately my my shader/glsl skills are very limited and so is the documentation of [mesh_square] or [glsl_vertex]... [mesh_square]-help just says: "This object is usefull when working with vertex_shader." do you (or anybody here) know any example patches that demonstrate the approach to creating an arbitrary plane with [mesh_square] ? (the GLSL example patches don't really seem to be pointing that out.) i also tried the geometry help patch from GEM examples, but this gives me an error: [glsl_geometry]: compile Info_log: [glsl_geometry]: ERROR: 0:17: 'gl_VerticesIn' : undeclared identifier best oliver ++ Jack Le 03/08/2018 à 17:02, oliver a écrit : Hi, dear list ! I am looking for a Geo, that looks like a distorted plane, in particular a "concave" or "convex" plane as shown in this .jpg: https://wolke.klingt.org/index.php/s/QO7Vb5UDNn42CG9 can anybody hint me to a way that this can be done in Gem ? the "convex" version seems easier, it's more or less a scaled cylinder, but i can't ssem to achieve the "concave" version with this Geo. Best Oliver ___ Pd-list@lists.iem.at mailing list UNSUBSCRIBE and account-management -> https://lists.puredata.info/listinfo/pd-list ___ Pd-list@lists.iem.at mailing list UNSUBSCRIBE and account-management -> https://lists.puredata.info/listinfo/pd-list
Re: [PD] Gem - how to get a concave/convex plane
Hello Oliver,
Le 04/08/2018 à 11:20, oliver a écrit :
> Jack wrote:
>> For me, the simplest way to achieve this, is to use a mesh square with
>> shaders. Take a look at exemples in Gem and shaders and how to move
>> vertices in model view.
>
> Hi, Jack ! thanks a lot for your suggestion.
>
> Unfortunately my my shader/glsl skills are very limited and so is the
> documentation of [mesh_square] or [glsl_vertex]...
>
> [mesh_square]-help just says:
> "This object is usefull when working with vertex_shader."
>
> do you (or anybody here) know any example patches that demonstrate the
> approach to creating an arbitrary plane with [mesh_square] ?
Yes, there is an exemple in Gem :
10.glsl/09.vertex_texture_fetching
In this exemple, the Z position of each vertex of a mesh_square depends
on the color of the texture.
>
> (the GLSL example patches don't really seem to be pointing that out.)
See above.
>
> i also tried the geometry help patch from GEM examples, but this gives
> me an error:
>
> [glsl_geometry]: compile Info_log:
> [glsl_geometry]: ERROR: 0:17: 'gl_VerticesIn' : undeclared identifier
Using geometry is possible here with [gemVertexbuffer] but it is more
complicated.
Attached is an exemple (not perfect) with a vertex shader and a fragment
shader with [mesh_square].
++
Jack
>
>
>
> best
>
> oliver
>
>
>> ++
>>
>> Jack
>>
>>
>> Le 03/08/2018 à 17:02, oliver a écrit :
>>> Hi, dear list !
>>>
>>> I am looking for a Geo, that looks like a distorted plane, in particular
>>> a "concave" or "convex" plane as shown in this .jpg:
>>>
>>> https://wolke.klingt.org/index.php/s/QO7Vb5UDNn42CG9
>>>
>>> can anybody hint me to a way that this can be done in Gem ?
>>>
>>> the "convex" version seems easier, it's more or less a scaled cylinder,
>>> but i can't ssem to achieve the "concave" version with this Geo.
>>>
>>> Best
>>>
>>> Oliver
>>>
>>>
>>
>>
>> ___
>> Pd-list@lists.iem.at mailing list
>> UNSUBSCRIBE and account-management ->
>> https://lists.puredata.info/listinfo/pd-list
>>
>
>
mesh_deformation.pd
Description: application/extension-pd
#define PI 3.1415926535897932384626433832795
uniform float deformation;
varying vec4 vertColor;
void main() {
vertColor = gl_Color;
vec4 pos_vertex = gl_Vertex;
float sign = sign(pos_vertex.y);
float add_y = cos(pos_vertex.x * PI * 0.5) * deformation;
pos_vertex.y += add_y * sign;
gl_Position = gl_ModelViewProjectionMatrix * pos_vertex;
}varying vec4 vertColor;
void main() {
gl_FragColor = vertColor;
}___
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Re: [PD] Gem - how to get a concave/convex plane
Jack wrote: For me, the simplest way to achieve this, is to use a mesh square with shaders. Take a look at exemples in Gem and shaders and how to move vertices in model view. Hi, Jack ! thanks a lot for your suggestion. Unfortunately my my shader/glsl skills are very limited and so is the documentation of [mesh_square] or [glsl_vertex]... [mesh_square]-help just says: "This object is usefull when working with vertex_shader." do you (or anybody here) know any example patches that demonstrate the approach to creating an arbitrary plane with [mesh_square] ? (the GLSL example patches don't really seem to be pointing that out.) i also tried the geometry help patch from GEM examples, but this gives me an error: [glsl_geometry]: compile Info_log: [glsl_geometry]: ERROR: 0:17: 'gl_VerticesIn' : undeclared identifier best oliver ++ Jack Le 03/08/2018 à 17:02, oliver a écrit : Hi, dear list ! I am looking for a Geo, that looks like a distorted plane, in particular a "concave" or "convex" plane as shown in this .jpg: https://wolke.klingt.org/index.php/s/QO7Vb5UDNn42CG9 can anybody hint me to a way that this can be done in Gem ? the "convex" version seems easier, it's more or less a scaled cylinder, but i can't ssem to achieve the "concave" version with this Geo. Best Oliver ___ Pd-list@lists.iem.at mailing list UNSUBSCRIBE and account-management -> https://lists.puredata.info/listinfo/pd-list -- /// http://pendler.klingt.org // \\\ http://oliver.klingt.org \\ ___ Pd-list@lists.iem.at mailing list UNSUBSCRIBE and account-management -> https://lists.puredata.info/listinfo/pd-list
Re: [PD] Gem - how to get a concave/convex plane
For me, the simplest way to achieve this, is to use a mesh square with shaders. Take a look at exemples in Gem and shaders and how to move vertices in model view. ++ Jack Le 03/08/2018 à 17:02, oliver a écrit : > Hi, dear list ! > > I am looking for a Geo, that looks like a distorted plane, in particular > a "concave" or "convex" plane as shown in this .jpg: > > https://wolke.klingt.org/index.php/s/QO7Vb5UDNn42CG9 > > can anybody hint me to a way that this can be done in Gem ? > > the "convex" version seems easier, it's more or less a scaled cylinder, > but i can't ssem to achieve the "concave" version with this Geo. > > Best > > Oliver > > ___ Pd-list@lists.iem.at mailing list UNSUBSCRIBE and account-management -> https://lists.puredata.info/listinfo/pd-list
[PD] Gem - how to get a concave/convex plane
Hi, dear list ! I am looking for a Geo, that looks like a distorted plane, in particular a "concave" or "convex" plane as shown in this .jpg: https://wolke.klingt.org/index.php/s/QO7Vb5UDNn42CG9 can anybody hint me to a way that this can be done in Gem ? the "convex" version seems easier, it's more or less a scaled cylinder, but i can't ssem to achieve the "concave" version with this Geo. Best Oliver -- /// http://pendler.klingt.org // \\\ http://oliver.klingt.org \\ ___ Pd-list@lists.iem.at mailing list UNSUBSCRIBE and account-management -> https://lists.puredata.info/listinfo/pd-list
