Just OSG 3.5.0 (130) GLES2 Shaders Example V2 /* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2015 Alex Cham * * This example is open source and may be redistributed and/or modified under * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or * (at your option) any later version. The full license is in LICENSE file * included with this distribution, and on the openscenegraph.org website. * * This example is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * OpenSceneGraph Public License for more details.
#define OPENSCENEGRAPH_MAJOR_VERSION 3 #define OPENSCENEGRAPH_MINOR_VERSION 5 #define OPENSCENEGRAPH_PATCH_VERSION 0 #define OPENSCENEGRAPH_SOVERSION 130 $ git log -1 commit bc3a77cb1561ed2e47e88ab507180bcf15309f31 Author: Robert OSFIELD <[email protected]> Date: Fri Jul 17 18:31:22 2015 +0000 */ #include <osgViewer/Viewer> #include <osg/ShapeDrawable> #include <osg/Geode> #include <osg/Vec3> #include <osg/Program> #include <osg/Shader> #include <osg/Uniform> using namespace osg; static const char *vertexShaderSource = { "#version 100\n" // "uniform mat4 mvp_matrix;// model-view-projection matrix\n" "uniform mat3 normal_matrix;// normal matrix\n" "uniform vec3 ec_light_dir;// light direction in eye coords\n" "attribute vec4 a_vertex;// vertex position\n" "attribute vec3 a_normal;// vertex normal\n" // "attribute vec2 a_texcoord;// texture coordinates\n" // "varying float v_diffuse;\n" // "varying vec2 v_texcoord;\n" "void main(void)\n" "{\n" "// put vertex normal into eye coords\n" "vec3 ec_normal = normalize(normal_matrix * a_normal);\n" // "// emit diffuse scale factor, texcoord, and position\n" // "v_diffuse = max(dot(ec_light_dir, ec_normal), 0.0);\n" // "v_texcoord= a_texcoord;\n" "gl_Position = gl_ModelViewProjectionMatrix * a_vertex;\n" "}\n"}; static const char *fragmentShaderSource = { "#version 100\n" "precision mediump float;\n" "void main()\n" "{\n" "gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);\n" "}\n"}; int main(int, char **) { osg::setNotifyLevel(osg::INFO); // construct the viewer. osgViewer::Viewer viewer; // use a geode with a Box ShapeDrawable osg::Geode* geode = new osg::Geode(); geode->addDrawable(new osg::ShapeDrawable(new osg::Box(osg::Vec3(0.0f,0.0f,0.0f),1.0f))); osg::StateSet *ss = geode->getOrCreateStateSet(); osg::Program* program = new osg::Program; program->addShader( new osg::Shader( osg::Shader::VERTEX, vertexShaderSource ) ); program->addShader( new osg::Shader( osg::Shader::FRAGMENT, fragmentShaderSource ) ); ss->setAttributeAndModes(program, osg::StateAttribute::ON); viewer.setSceneData(geode); return viewer.run(); } /* mkdir ./GLES2ContextBuild cd ./GLES2ContextBuild cmake \ -DCMAKE_C_COMPILER="/usr/bin/clang" \ -DCMAKE_CXX_COMPILER="/usr/bin/clang++" \ -DCMAKE_CXX_FLAGS="-std=c++11 -v -Wall" \ -DBUILD_OSG_EXAMPLES=1 \ -DOSG_GL1_AVAILABLE=OFF \ -DOSG_GL2_AVAILABLE=OFF \ -DOSG_GL3_AVAILABLE=OFF \ -DOSG_GLES1_AVAILABLE=OFF \ -DOSG_GLES2_AVAILABLE=ON \ -DOPENGL_INCLUDE_DIR=/usr/include/ \ -DOPENGL_LIBRARY=/usr/lib/x86_64-linux-gnu/libGLESv2.so \ -DOPENGL_egl_LIBRARY=/usr/lib/x86_64-linux-gnu/libEGL.so \ -DOSG_GL_DISPLAYLISTS_AVAILABLE=OFF \ -DSG_GL_MATRICES_AVAILABLE=OFF \ -DOSG_GL_VERTEX_FUNCS_AVAILABLE=OFF \ -DOSG_GL_VERTEX_ARRAY_FUNCS_AVAILABLE=OFF \ -DOSG_GL_FIXED_FUNCTION_AVAILABLE=OFF \ -DOSG_CPP_EXCEPTIONS_AVAILABLE=OFF \ ../GLES2ContextSource http://trac.openscenegraph.org/projects/osg/wiki/Community/OpenGL-ES Based on OSG osgsimpleshaders.cpp http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk/examples/osgsimpleshaders/osgsimpleshaders.cpp See Also Hello Triangle: An OpenGL ES 2.0 Example https://www.khronos.org/assets/uploads/books/openglr_es_20_programming_guide_sample.pdf OpenGL ES 2.0 API & OpenGL ES Shading Language 1.0 Quick Reference Card https://www.khronos.org/files/opengles20-reference-card.pdf OpenGL ES Shading Language Version 1.00 https://www.khronos.org/files/opengles_shading_language.pdf */ Thank you! Cheers, Alex ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=64385#64385 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
