Hi Zach, Yep this sounds like software rendering. Check you pixel formats on the texture.
Robert. On 4/30/07, Zach Deedler <[EMAIL PROTECTED]> wrote:
Hi Paul, Yes I could've been more descriptive. "renders horribly", like 1fps. The texture I'm using is 512x256. The draw time is 1128ms. I'm up to date with my drivers. Zach > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Paul Speed > Sent: Sunday, April 29, 2007 21:29 > To: osg users > Subject: Re: [osg-users] Height map vertex shader > > Can you describe what you mean by "renders horribly"? > Perhaps that will provide a clue. > > Is this just a flat shaded shape? I noticed you aren't > giving it texture or color or anything. > > -Paul > > Zach Deedler wrote: > > Hello osg-users, > > > > I'm trying to implement dynamic terrain displacement using > a shader. > > I am trying to just edit a texture to cause the vertex > shader to look > > at the texture, and modify the vertex displacement. But, when I > > implemented it, it renders horribly. Anybody see what I > did wrong in my vertex shader? > > > > uniform sampler2D heightMapSampler; > > void main() > > { > > vec3 vertex; > > > > gl_TexCoord[0] = gl_MultiTexCoord0; > > vec4 heightMap = texture2D( heightMapSampler, > gl_MultiTexCoord0.st ); > > vertex.xy = gl_Vertex.xy; > > //Add displacement to vertex. > > vertex.z = gl_Vertex.z + heightMap.r; > > gl_Position = gl_ModelViewProjectionMatrix * vec4(vertex,1.0); } > > > > I have a feeling I'm supposed to be using texture2DLod in > the vertex > > shader, or that this just isn't a viable way to do vertex > displacements. > > > > Thanks. > > > > _______________________________________________ > > osg-users mailing list > > [email protected] > > http://openscenegraph.net/mailman/listinfo/osg-users > > http://www.openscenegraph.org/ > _______________________________________________ > osg-users mailing list > [email protected] > http://openscenegraph.net/mailman/listinfo/osg-users > http://www.openscenegraph.org/ > _______________________________________________ osg-users mailing list [email protected] http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/
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