Hi Sebastian, Declare the function stub in the main.frag
vec3 fog(in vec3 color); void main().. K. 2009/11/30 Sebastien Nerig <[email protected]>: > Hi robert > thx for your answer > Ok I tried what you said, but I still have a pb. > > I made a shader "common.frag" with a basic fog function > > > Code: > uniform vec3 fogColor; > uniform float fogDensity; > > vec3 fog(in vec3 color) > { > const float LOG2 = 1.442695; > float z = gl_FragCoord.z / gl_FragCoord.w; > float fogFactor = exp2(-fogDensity * fogDensity * z * z * LOG2); > fogFactor = clamp(fogFactor, 0.0, 1.0); > return mix(fogColor, color, fogFactor); > } > > > > And I did a "main.frag" with the main function > > > Code: > void main(void) > { > vec3 color = vec3(1,1,1); > color = fog(color); > gl_FragColor = vec4(color, 1); > } > > > > then I load thoses shaders into one program as fragment shader > > Code: > osg::Program* program = new osg::Program; > osg::Shader* shader = new osg::Shader(osg::Shader::FRAGMENT); > shader->loadShaderSourceFromFile("common.frag"); > program->addShader(shader); > osg::Shader* shader1 = new osg::Shader(osg::Shader::FRAGMENT); > shader1->loadShaderSourceFromFile("main.frag"); > program->addShader(shader1) > > > > But when OSG compile my shader, it fails because "fog" is not known in the > main function. > Any ideas ? If I find the solution I will post... > > thanks a lot > Sebastien[/code] > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=20578#20578 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
