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moving each vertex along its normal
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hello i want to apply an extrude effect to a mesh so i just want to move each vertex along its normal.
this is what i try in glsl code:
vec4 v = vec4(gl_Vertex.xyz + gl_Normal * moveamount, 1);
gl_Position = gl_ProjectionMatrix * gl_ModelViewMat... |
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Posted January 4, 2011 12:39:04 PM
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sphere with texturecoordinates for spherical panorama
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hello,
not sure if this is the right forum.
i am looking for sphere-model that has texture coordinates which fit a spherical panorama image like this one:
http://www.panoramio.com/photo/19699699
i am also interested in an algorithm that... |
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Posted October 29, 2010 3:32:19 PM
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collision of moving objects along arbitray path
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hello, i guess the following is a common problem in collision detection, but i am new to physics so i have no idea about it.
i have two moving objects that should be tested for collision. so each frame i test if the distance between them is small... |
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Posted September 9, 2010 6:53:37 AM
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android/opengles alpha textures not semitransparent but binary transparent
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hello, i am drawing some textures with alpha channel, but when they are displayed it looks like the alpha channel is only binary. so a pixel is either transparent or opaque, although in the texture file itself the pixel is half-transparent.
i... |
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Posted September 6, 2010 6:34:26 AM
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OBJ renderer with vertex arrays
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hello,
does anyone know of an opengl class or sample code that renders meshes in the OBJ file format using vertex arrays? the programming language doesnt matter.
so far i have been using classic glVertex stuff, but now i need to switch to VAs... |
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Posted August 25, 2010 7:13:53 AM
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how to provide vertexattributes when rendering with vertex arrays
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hello, since OpenGL ES doesnt provide functions like glVertex anymore i am forced to use vertex arrays, right?
but how would one provide vertex paramters via glVertexAttrib when rendering with VAs.
also how can you define hard edges? i.e.... |
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Posted August 21, 2010 5:01:55 PM
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looking for octave of note-sounds
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hello,
i am looking for a free-to-use set of notes, which cover about three octaves. (ideally from a piano, but other instruments or tunes might work too)
thanks!
[Edited by - ehmdjii on July 6, 2010 6:39:40 AM] |
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Posted July 5, 2010 11:27:16 AM
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how to interpolate a matrix
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hello,
i store the position of an object in 3d space in a 4by4 transformation matrix. now in order to move the object from the position stored in matrix A to the position stored in matrix B, i would like to interpolate them.
so do i just do thi... |
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Posted June 23, 2010 3:57:29 AM
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intel cards: "no errors" from glsl
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hello, i am using this code to check if my glsl shader compiled fine.
glGetObjectParameterivARB(obj, GL_OBJECT_INFO_LOG_LENGTH_ARB, &infologLength);
if (infologLength > 1)
{
int charsWritten = 0;
char * const infoLog... |
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Posted April 18, 2010 1:11:11 PM
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how to make a ribbon effect?
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hello,
i am trying to implement the effect of an object, which, when moving around, leaves a glowing trail behind.
i was wondering how this effect is usually done. are the polygons of the trail procedurally created? do you usually use quad str... |
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Posted February 20, 2010 4:36:30 AM
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View All Topics Started By This User
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| Some recent replies made on our forums |
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moving each vertex along its normal
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you were right, there was a problem with the sphere model itself. all the faces where duplicated and mirrored. that's why i saw backfaced faces in the first place. |
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Posted January 4, 2011 4:35:57 PM
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sphere with texturecoordinates for spherical panorama
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thanks, yes i have wings3d or blender. |
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Posted October 29, 2010 3:47:04 PM
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android/opengles alpha textures not semitransparent but binary transparent
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thanks for the hint. actually
gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
did the trick.
however i am not sure if i want to use that. since on all my desktop opengl apps i use
gl.glBlendFunc(GL10.GL_ONE, GL10.GL_ONE... |
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Posted September 6, 2010 8:48:19 AM
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android/opengles alpha textures not semitransparent but binary transparent
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ok, this is how the blending is set up:
gl.glEnable(GL10.GL_BLEND);
gl.glBlendFunc(GL10.GL_ONE, GL10.GL_ONE_MINUS_SRC_ALPHA); |
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Posted September 6, 2010 7:20:41 AM
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how to provide vertexattributes when rendering with vertex arrays
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thanks everyone! |
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Posted August 22, 2010 5:22:24 AM
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GLES and glOrthof
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well in my case it turned out to be caused by using glorthox instead of glorthof, as well as the x version of all other fl functions |
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Posted August 21, 2010 4:28:08 PM
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GLES and glOrthof
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yes, i am on android 2.2 |
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Posted August 20, 2010 5:20:57 AM
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GLES and glOrthof
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yes i have problems with glortho in opengles too. but for me it is already broken on the emulator.
i usually set it up like this so that i can do pixelperfect drawing
glOrtho(0, width, 0 height, -1, 1);
but the viewport doesnt seem to ha... |
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Posted August 19, 2010 4:07:31 PM
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looking for octave of note-sounds
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Quote:Original post by milkshakeiii
Actually, wouldn't you say that there is a good chance that merely downloading a simple sample library with the raw WAVs accessable will serve the OP's purpose?
For example: http://www.archive.org/download/Berk... |
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Posted July 13, 2010 11:21:00 AM
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looking for octave of note-sounds
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> Ok so you want a seperate file for each note?
yes, that would be the ideal situation.
something like c.wav, d.wav, e.wav, ...
the idea is that in the end i want to procedurally play a tune similar to midi files.
> And how long shou... |
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Posted July 7, 2010 1:49:54 PM
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View All Replies Made By This User
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