thanks wes, i tried playing around with the js, replacing the sphere with a gl.model dont seem to work for me. any pointers?

On 1/4/07, Wesley Smith wrote: > > For those who are curious about how to do projective texturing in > Jitter, I've uploaded a sample patch and Cg shader for doing > projective texturing with Phong shading. I'm using the jit.gl.texture > @bordercolor attribute in the patch, so if you don't have the latest > beta when a bug related to bordercolor was fixed, some of the colors > might look funky. > > The key to doing projetive texturing is using OpenGL's matrix loading > and multiplication functions to calculate the coordinate transform of > the scene from the light's point of view. This is applied to the > texture coordinates so that they seem to project from that location. > The texture transform matrix also needs the model to world transform > of the object the shader is operating on, so that matrix is passed in > as another variable. > > Here's the link: http://www.mat.ucsb.edu/~whsmith/ProjectiveTextures.zip . > > wes >

Works for me. It may the model file you're using?? Not sure. Try this snippet:

var sphere = new JitterObject("jit.gl.gridshape", RenderContext); sphere.shape = "sphere"; sphere.lighting_enable = 1; sphere.blend_enable = 1; sphere.color = [1., 1., 1., 1.]; sphere.texture = "movie"; sphere.shader = shader.name; sphere.auto_material = 0; sphere.automatic = 0;

var model = new JitterObject("jit.gl.model", RenderContext); model.lighting_enable = 1; model.blend_enable = 1; model.color = [1., 1., 1., 1.]; model.scale = [5., 5., 5.]; model.texture = "movie"; model.shader = shader.name; model.auto_material = 0; model.automatic = 0; model.read("starfish.obj");

var objects = new Array() objects[objects.length] = ground; objects[objects.length] = sphere; objects[objects.length] = model;

function camera(vals) { camera_pos = arrayfromargs(arguments); }

erd

On 1/4/07, yair reshef wrote: > thanks wes, i tried playing around with the js, replacing the sphere with a > gl.model dont seem to work for me. any pointers? > > > > On 1/4/07, Wesley Smith wrote: > > > > For those who are curious about how to do projective texturing in > > Jitter, I've uploaded a sample patch and Cg shader for doing > > projective texturing with Phong shading. I'm using the jit.gl.texture > > @bordercolor attribute in the patch, so if you don't have the latest > > beta when a bug related to bordercolor was fixed, some of the colors > > might look funky. > > > > The key to doing projetive texturing is using OpenGL's matrix loading > > and multiplication functions to calculate the coordinate transform of > > the scene from the light's point of view. This is applied to the > > texture coordinates so that they seem to project from that location. > > The texture transform matrix also needs the model to world transform > > of the object the shader is operating on, so that matrix is passed in > > as another variable. > > > > Here's the link: > http://www.mat.ucsb.edu/~whsmith/ProjectiveTextures.zip . > > > > wes > > > > > > >

my syntax... i used hand.read = ("hand.obj"); instead of hand.read("hand.obj");

all is well

On 1/5/07, yair reshef wrote: > > as you guessed the problem was with the model file, i used one imported > from 3dsmax, changing it to "apple.obj" worked. i trusted that model as i > got it to work with jit.model before. > here it is. > the object is a hand, part of the makeHuman, > http://www.dedalo-3d.com/index.php , a poser gnu clone. > > On 1/4/07, Wesley Smith wrote: > > > > Works for me. It may the model file you're using?? Not sure. Try this > > snippet: > > > > var sphere = new JitterObject("jit.gl.gridshape", RenderContext); > > sphere.shape = "sphere"; > > sphere.lighting_enable = 1; > > sphere.blend_enable = 1; > > sphere.color = [1., 1., 1., 1.]; > > sphere.texture = "movie"; > > sphere.shader = shader.name; > > sphere.auto_material = 0; > > sphere.automatic = 0; > > > > var model = new JitterObject("jit.gl.model", RenderContext); > > model.lighting_enable = 1; > > model.blend_enable = 1; > > model.color = [1., 1., 1., 1.]; > > model.scale = [5., 5., 5.]; > > model.texture = "movie"; > > model.shader = shader.name; > > model.auto_material = 0; > > model.automatic = 0; > > model.read("starfish.obj"); > > > > var objects = new Array() > > objects[ objects.length] = ground; > > objects[objects.length] = sphere; > > objects[objects.length] = model; > > > > function camera(vals) > > { > > camera_pos = arrayfromargs(arguments); > > } > > > > erd > > > > > > On 1/4/07, yair reshef < yair99@gmail.com> wrote: > > > thanks wes, i tried playing around with the js, replacing the sphere > > with a > > > gl.model dont seem to work for me. any pointers? > > > > > > > > > > > > On 1/4/07, Wesley Smith wrote: > > > > > > > > For those who are curious about how to do projective texturing in > > > > Jitter, I've uploaded a sample patch and Cg shader for doing > > > > projective texturing with Phong shading. I'm using the > > jit.gl.texture > > > > @bordercolor attribute in the patch, so if you don't have the latest > > > > beta when a bug related to bordercolor was fixed, some of the colors > > > > > > might look funky. > > > > > > > > The key to doing projetive texturing is using OpenGL's matrix > > loading > > > > and multiplication functions to calculate the coordinate transform > > of > > > > the scene from the light's point of view. This is applied to the > > > > texture coordinates so that they seem to project from that location. > > > > The texture transform matrix also needs the model to world transform > > > > of the object the shader is operating on, so that matrix is passed > > in > > > > as another variable. > > > > > > > > Here's the link: > > > http://www.mat.ucsb.edu/~whsmith/ProjectiveTextures.zip. > > > > > > > > wes > > > > > > > > > > > > > > > > > > > > > > > >

now im trying to add to the loop an opengl object from outside js. my logic was that if only i add the gl obejct instance name to the // for(var i=0; i < objects.length; i++) { var model_to_world = modelToWorldTransform(objects[i]); shader.param("modelToWorld", model_to_world); objects[i].draw(); } // but if i recall it isnt possible to share a render context in js and in max togther. at least i couldnt find an example for such. is this possible? hope im getting thru.

On 1/5/07, yair reshef wrote: > > my syntax... > i used > hand.read = ("hand.obj"); > instead of > hand.read("hand.obj"); > > all is well > > On 1/5/07, yair reshef wrote: > > > > as you guessed the problem was with the model file, i used one imported > > from 3dsmax, changing it to "apple.obj" worked. i trusted that model as > > i got it to work with jit.model before. > > here it is. > > the object is a hand, part of the makeHuman, > > http://www.dedalo-3d.com/index.php , a poser gnu clone. > > > > On 1/4/07, Wesley Smith < wesley.hoke@gmail.com> wrote: > > > > > > Works for me. It may the model file you're using?? Not sure. Try > > > this snippet: > > > > > > var sphere = new JitterObject("jit.gl.gridshape", RenderContext); > > > sphere.shape = "sphere"; > > > sphere.lighting_enable = 1; > > > sphere.blend_enable = 1; > > > sphere.color = [1., 1., 1., 1.]; > > > sphere.texture = "movie"; > > > sphere.shader = shader.name; > > > sphere.auto_material = 0; > > > sphere.automatic = 0; > > > > > > var model = new JitterObject("jit.gl.model", RenderContext); > > > model.lighting_enable = 1; > > > model.blend_enable = 1; > > > model.color = [1., 1., 1., 1.]; > > > model.scale = [5., 5., 5.]; > > > model.texture = "movie"; > > > model.shader = shader.name; > > > model.auto_material = 0; > > > model.automatic = 0; > > > model.read ("starfish.obj"); > > > > > > var objects = new Array() > > > objects[ objects.length] = ground; > > > objects[objects.length] = sphere; > > > objects[objects.length] = model; > > > > > > function camera(vals) > > > { > > > camera_pos = arrayfromargs(arguments); > > > } > > > > > > erd > > > > > > > > > On 1/4/07, yair reshef < yair99@gmail.com> wrote: > > > > thanks wes, i tried playing around with the js, replacing the sphere > > > with a > > > > gl.model dont seem to work for me. any pointers? > > > > > > > > > > > > > > > > On 1/4/07, Wesley Smith wrote: > > > > > > > > > > For those who are curious about how to do projective texturing in > > > > > Jitter, I've uploaded a sample patch and Cg shader for doing > > > > > projective texturing with Phong shading. I'm using the > > > jit.gl.texture > > > > > @bordercolor attribute in the patch, so if you don't have the > > > latest > > > > > beta when a bug related to bordercolor was fixed, some of the > > > colors > > > > > might look funky. > > > > > > > > > > The key to doing projetive texturing is using OpenGL's matrix > > > loading > > > > > and multiplication functions to calculate the coordinate transform > > > of > > > > > the scene from the light's point of view. This is applied to the > > > > > texture coordinates so that they seem to project from that > > > location. > > > > > The texture transform matrix also needs the model to world > > > transform > > > > > of the object the shader is operating on, so that matrix is passed > > > in > > > > > as another variable. > > > > > > > > > > Here's the link: > > > > http://www.mat.ucsb.edu/~whsmith/ProjectiveTextures.zip. > > > > > > > > > > wes > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >

I don't think this is going to workout. You need some kind of function like jit_object_findregistered() which doesn't exist in JS. You'll need to figure out another way to do things. Theoretically, you can convert the JS into a patch. It might even work nicely in a poly~ which you can use in place of the for loop.

HTH, wes