Renamed osgshadercompositor to osgvirtualprogram.

2010-06-24 14:03:51 +00:00
parent 0816d4f9cd
commit d138f99cf1
7 changed files with 4 additions and 3 deletions
--- a/examples/osgvirtualprogram/CreateSimpleHierachy.cpp
+++ b/examples/osgvirtualprogram/CreateSimpleHierachy.cpp
@@ -0,0 +1,147 @@
+#include <iostream>
+#include <osg/Geode>
+#include <osg/TexGen>
+#include <osg/Texture2D>
+#include <osg/MatrixTransform>
+#include <osgDB/ReadFile>
+#include <osgViewer/Viewer>
+
+#include "VirtualProgram.h"
+
+using osgCandidate::VirtualProgram;
+
+////////////////////////////////////////////////////////////////////////////////
+osg::Node * CreateSimpleHierarchy( osg::Node * node )
+{
+    if( !node ) return NULL;
+    float r = node->getBound().radius(); // diameter
+    osg::Group * root = new osg::Group();
+    osg::Group * group = new osg::Group();
+
+    // Create four matrices for translated instances of the cow
+    osg::MatrixTransform * transform0  = new osg::MatrixTransform( );
+    transform0->setMatrix( osg::Matrix::translate( 0,0,r ) );
+
+    osg::MatrixTransform * transform1  = new osg::MatrixTransform( );
+    transform1->setMatrix( osg::Matrix::translate( 0,0,0 ) );
+
+    osg::MatrixTransform * transform2  = new osg::MatrixTransform( );
+    transform2->setMatrix( osg::Matrix::translate( -r,0,-r ) );
+
+    osg::MatrixTransform * transform3  = new osg::MatrixTransform( );
+    transform3->setMatrix( osg::Matrix::translate(  r,0,-r ) );
+
+    root->addChild( transform0 );
+    root->addChild( group );
+    group->addChild( transform1 );
+    group->addChild( transform2 );
+    group->addChild( transform3 );
+
+    transform0->addChild( node );
+    transform1->addChild( node );
+    transform2->addChild( node );
+    transform3->addChild( node );
+
+    // At the scene root apply standard program 
+    if( 1 )
+    {
+        osg::Program * program = new osg::Program;
+        osg::Shader * main = new osg::Shader( osg::Shader::FRAGMENT );
+
+        main->setShaderSource(
+            "uniform sampler2D base; \n"
+            "void main(void) \n"
+            "{\n"
+            "    gl_FragColor = gl_Color * texture2DProj( base, gl_TexCoord[0] );\n"
+            "    gl_FragColor *= vec4( 1.0, 1.0, 1.0, 0.5 ); \n"
+            "}\n"
+            );
+        program->addShader( main );
+
+        main->setName( "White" ); 
+
+        root->getOrCreateStateSet( )->setAttributeAndModes( program );
+    }
+
+    // Now override root program with default VirtualProgram for three bottom cows
+    if( 1 )
+    {
+        VirtualProgram * virtualProgram = new VirtualProgram( );
+
+        // Create main shader which declares and calls ColorFilter function 
+        osg::Shader * main = new osg::Shader( osg::Shader::FRAGMENT );
+
+        main->setShaderSource( 
+            "vec4 ColorFilter( in vec4 color ); \n"
+            "uniform sampler2D base; \n"
+            "void main(void) \n"
+            "{ \n"
+            "    gl_FragColor = gl_Color * texture2DProj( base, gl_TexCoord[0] ); \n"
+            "    gl_FragColor = ColorFilter( gl_FragColor ); \n"
+            "}\n"
+            );
+
+        virtualProgram->setShader( "main", main );
+
+        main->setName( "Virtual Main" );
+
+        // Create filter shader which implements greem ColorFilter function 
+        osg::Shader * colorFilter = new osg::Shader( osg::Shader::FRAGMENT );
+
+        colorFilter->setShaderSource(       
+            "vec4 ColorFilter( in vec4 color ) \n"
+            "{ \n"
+            "    return color * vec4( 0.0, 1.0, 0.0, 1.0 ); \n"
+            "}\n"
+            );
+
+        colorFilter->setName( "Virtual Green" );
+
+        virtualProgram->setShader( "ColorFilter", colorFilter );
+
+        group->getOrCreateStateSet( )->setAttributeAndModes( virtualProgram );
+    }
+
+    // Create "incomplete" VirtualProgram overriding ColorFilter function
+    // Lower left cow drawn will be red
+    if( 1 )
+    {
+        VirtualProgram * virtualProgram = new VirtualProgram();
+      
+        osg::Shader * redFilter = new osg::Shader( osg::Shader::FRAGMENT );
+        redFilter->setShaderSource( 
+            "vec4 ColorFilter( in vec4 color ) \n"
+            "{ \n"
+            "    return color * vec4( 1, 0, 0, 1 ); \n"
+            "}\n"
+            );
+        virtualProgram->setShader( "ColorFilter", redFilter );
+
+        redFilter->setName( "Virtual Red" );
+
+        transform2->getOrCreateStateSet( )->setAttribute( virtualProgram );
+    }   
+
+    // Create "incomplete" VirtualProgram overriding ColorFilter function
+    // Lower right cow will be drawn with grid pattern on yellow background
+    if( 1 )
+    {
+        VirtualProgram * virtualProgram = new VirtualProgram();
+
+        osg::Shader * gridFilter = new osg::Shader( osg::Shader::FRAGMENT );
+        gridFilter->setShaderSource(         
+            "vec4 ColorFilter( in vec4 color ) \n"
+            "{ \n"
+            "    vec2 grid = clamp( mod( gl_FragCoord.xy, 16.0 ), 0.0, 1.0 ); \n"
+            "    return color * vec4( grid, 0.0, 1.0 ); \n"
+            "}\n"
+            );
+        virtualProgram->setShader( "ColorFilter", gridFilter );
+
+        gridFilter->setName( "Virtual Grid" );
+       
+        transform3->getOrCreateStateSet( )->setAttribute( virtualProgram );
+    }
+
+    return root;
+}//////////////////////////////////////////