obuil

1. #include <osg/Geometry>
   
2. #include <osg/Group>
   
3. #include <osg/Texture2D>
   
4. #include <osg/TextureCubeMap>
   
5. #include <osgDB/ReadFile>
   
6. #include <osgViewer/Viewer>
   
7. 
   
8. osg::ref_ptr<osg::Geometry> createPlane( float length, float width )
   
9. {
   
10.         osg::ref_ptr<osg::Vec3Array> vec = new osg::Vec3Array;
    
11.         vec->resize( 8 );
    
12.         (*vec)[0] = osg::Vec3f(  length, 0, width )*0.5;
    
13.         (*vec)[1] = osg::Vec3f( -length, 0, width )*0.5;
    
14.         (*vec)[2] = osg::Vec3f( -length, 0,-width )*0.5;
    
15.         (*vec)[3] = osg::Vec3f(  length, 0,-width )*0.5;
    
16. 
    
17.         osg::ref_ptr<osg::Vec3Array> nor = new osg::Vec3Array;
    
18.         nor->push_back( osg::Vec3f( 0.0, -1.0, 0.0 ) );
    
19. 
    
20.         osg::ref_ptr<osg::Vec2Array> tex = new osg::Vec2Array;
    
21.         tex->push_back( osg::Vec2f(5.0, 5.0) );
    
22.         tex->push_back( osg::Vec2f(0.0, 5.0) );
    
23.         tex->push_back( osg::Vec2f(0.0, 0.0) );
    
24.         tex->push_back( osg::Vec2f(5.0, 0.0) );
    
25. 
    
26.         osg::ref_ptr<osg::Geometry> geo = new osg::Geometry;
    
27.         geo->setVertexArray( vec.get() );
    
28.         geo->setTexCoordArray( 0, tex.get() );
    
29.         geo->setNormalArray( nor.get() );
    
30.         geo->setNormalBinding( osg::Geometry::BIND_PER_PRIMITIVE_SET );
    
31.         geo->addPrimitiveSet( new osg::DrawArrays( osg::PrimitiveSet::QUADS, 0, 4 ) );
    
32. 
    
33.         return geo;
    
34. }
    
35. 
    
36. osg::TextureCubeMap* readCubeMap()
    
37. {
    
38.         osg::TextureCubeMap* cubemap = new osg::TextureCubeMap;
    
39. 
    
40.         osg::Image* imagePosX = osgDB::readImageFile( "cubemap/posx.bmp" );
    
41.         osg::Image* imageNegX = osgDB::readImageFile( "cubemap/negx.bmp" );
    
42.         osg::Image* imagePosY = osgDB::readImageFile( "cubemap/posy.bmp" );
    
43.         osg::Image* imageNegY = osgDB::readImageFile( "cubemap/negy.bmp" );
    
44.         osg::Image* imagePosZ = osgDB::readImageFile( "cubemap/posz.bmp" );
    
45.         osg::Image* imageNegZ = osgDB::readImageFile( "cubemap/negz.bmp" );
    
46. 
    
47.         if (imagePosX && imageNegX && imagePosY /*&& imageNegY && imagePosZ && imageNegZ*/)
    
48.         {
    
49.                 cubemap->setImage(osg::TextureCubeMap::POSITIVE_X, imagePosX);
    
50.                 cubemap->setImage(osg::TextureCubeMap::NEGATIVE_X, imageNegX);
    
51.                 cubemap->setImage(osg::TextureCubeMap::POSITIVE_Y, imagePosY);
    
52.                 cubemap->setImage(osg::TextureCubeMap::NEGATIVE_Y, imageNegY);
    
53.                 cubemap->setImage(osg::TextureCubeMap::POSITIVE_Z, imagePosZ);
    
54.                 cubemap->setImage(osg::TextureCubeMap::NEGATIVE_Z, imageNegZ);
    
55. 
    
56.                 cubemap->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
    
57.                 cubemap->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
    
58.                 cubemap->setWrap(osg::Texture::WRAP_R, osg::Texture::CLAMP_TO_EDGE);
    
59. 
    
60.                 cubemap->setFilter(osg::Texture::MIN_FILTER, osg::Texture::LINEAR_MIPMAP_LINEAR);
    
61.                 cubemap->setFilter(osg::Texture::MAG_FILTER, osg::Texture::LINEAR);
    
62.         }
    
63. 
    
64.         return cubemap;
    
65. }
    
66. 
    
67. 
    
68. class updateShader : public osg::Uniform::Callback
    
69. {
    
70. public:
    
71.         updateShader() : time(0.0), dir(true) {}
    
72.         virtual void operator() ( osg::Uniform* uniform, osg::NodeVisitor* nv )
    
73.         {
    
74.                 time += 0.03;
    
75.                 uniform->set( time );
    
76.         }
    
77. 
    
78.         bool dir;
    
79.         float time;
    
80. };
    
81. 
    
82. int main(int argc, char** argv)
    
83. {
    
84.         osg::Group* root = new osg::Group;
    
85.         osg::Geode* model = new osg::Geode;
    
86.         model->addDrawable( createPlane(5, 5).get() );
    
87.         //osg::Node* model = osgDB::readNodeFile( "cow.osg" );
    
88.         root->addChild( model );
    
89. 
    
90.         osg::StateSet* stateset = model->getOrCreateStateSet();
    
91.         osg::Shader* vertexShader = new osg::Shader( osg::Shader::VERTEX );
    
92.         osg::Shader* fragmentShader = new osg::Shader( osg::Shader::FRAGMENT );
    
93.         vertexShader->loadShaderSourceFromFile( "ocean.vert" );
    
94.         fragmentShader->loadShaderSourceFromFile( "ocean.frag" );
    
95. 
    
96.         osg::Program* program = new osg::Program;
    
97.         program->addShader( vertexShader );
    
98.         program->addShader( fragmentShader );
    
99.         stateset->setAttributeAndModes( program, osg::StateAttribute::ON );
    
100. 
     
101.         osg::Uniform* param1 = new osg::Uniform( "LightPos", osg::Vec3(1.0, 1.0, 0.0) );
     
102.         stateset->addUniform( param1 );
     
103.         osg::Uniform* param2 = new osg::Uniform( "time", 0.0f );
     
104.         param2->setUpdateCallback( new updateShader );
     
105.         stateset->addUniform( param2 );
     
106.         osg::Uniform* param3 = new osg::Uniform( "normalMap", 0 );
     
107.         stateset->addUniform( param3 );
     
108.         osg::Uniform* param4 = new osg::Uniform( "cubeMap", 1 );
     
109.         stateset->addUniform( param4 );
     
110. 
     
111.         osg::Image* image = osgDB::readImageFile( "water.bmp" );
     
112.         osg::Texture2D* tex = new osg::Texture2D( image );
     
113.         tex->setWrap(osg::Texture::WRAP_S, osg::Texture::REPEAT);
     
114.         tex->setWrap(osg::Texture::WRAP_T, osg::Texture::REPEAT);
     
115.         tex->setWrap(osg::Texture::WRAP_R, osg::Texture::REPEAT);
     
116.         tex->setFilter(osg::Texture::MIN_FILTER, osg::Texture::LINEAR_MIPMAP_LINEAR);
     
117.         tex->setFilter(osg::Texture::MAG_FILTER, osg::Texture::LINEAR);
     
118.         stateset->setTextureAttributeAndModes( 0, tex, osg::StateAttribute::ON );
     
119. 
     
120.         stateset->setTextureAttributeAndModes( 1, readCubeMap(), osg::StateAttribute::ON );
     
121. 
     
122.         osgViewer::Viewer viewer;
     
123.         viewer.setSceneData( root );
     
124.         viewer.realize();
     
125.         
     
126.         return viewer.run();
     
127. }
     

复制代码

游客，如果您要查看本帖隐藏内容请回复

多谢分享

看看，谢谢了

感谢分享，资料真多

谢谢分享，学习了。

shengma 发表于 2013-11-16 07:40 AM
谢谢分享，学习了。

多谢分享

求分享啊

osg通过shader实现的水面效果

感谢楼主！

学习了，感谢

谢谢分享。
但是，里面的 bmp文件需要从哪里获得呢？

谢谢分享

看看效果如何，

freeman 发表于 2013-12-24 10:52 PM
看看效果如何，

高级特性还是比较牛啊

多谢分享

谢谢分享

谢谢分享

很好 谢谢 顶一下

看看，学习下

谢谢分享，学习一下。