// Render the color cube into the FBO
void FboBasicApp::renderSceneToFbo()
{
// this will restore the old framebuffer binding when we leave this function
// on non-OpenGL ES platforms, you can just call mFbo->unbindFramebuffer() at the end of the function
// but this will restore the "screen" FBO on OpenGL ES, and does the right thing on both platforms
gl::ScopedFramebuffer fbScp( mFbo );
// clear out the FBO with blue
gl::clear( Color( 0.25, 0.5f, 1.0f ) );
// setup the viewport to match the dimensions of the FBO
gl::ScopedViewport scpVp( ivec2( 0 ), mFbo->getSize() );
// setup our camera to render the torus scene
CameraPersp cam( mFbo->getWidth(), mFbo->getHeight(), 60.0f );
cam.setPerspective( 60, mFbo->getAspectRatio(), 1, 1000 );
cam.lookAt( vec3( 2.8f, 1.8f, -2.8f ), vec3( 0 ));
gl::setMatrices( cam );
// set the modelview matrix to reflect our current rotation
gl::setModelMatrix( mRotation );
// render the color cube
gl::ScopedGlslProg shaderScp( gl::getStockShader( gl::ShaderDef().color() ) );
gl::color( Color( 1.0f, 0.5f, 0.25f ) );
gl::drawColorCube( vec3( 0 ), vec3( 2.2f ) );
gl::color( Color::white() );
}
// Render our scene into the FBO (a cube)
void FboMultipleRenderTargetsApp::renderSceneToFbo()
{
// setup our camera to render our scene
CameraPersp cam( mFbo->getWidth(), mFbo->getHeight(), 60 );
cam.setPerspective( 60, mFbo->getAspectRatio(), 1, 1000 );
cam.lookAt( vec3( 2.8f, 1.8f, -2.8f ), vec3( 0 ) );
// bind our framebuffer in a safe way:
gl::ScopedFramebuffer fboScope( mFbo );
// clear out both of the attachments of the FBO with black
gl::clear();
// setup the viewport to match the dimensions of the FBO, storing the previous state
gl::ScopedViewport viewportScope( ivec2( 0 ), mFbo->getSize() );
// store matrices before updating for CameraPersp
gl::ScopedMatrices matScope;
gl::setMatrices( cam );
// set the modelview matrix to reflect our current rotation
gl::multModelMatrix( mRotation );
// render the torus with our multiple-output shader
gl::ScopedGlslProg glslScope( mGlslMultipleOuts );
gl::drawCube( vec3( 0 ), vec3( 2.2f ) );
}
void ShadowMappingBasic::setup()
{
mLightPos = vec3( 0.0f, 5.0f, 1.0f );
gl::Texture2d::Format depthFormat;
#if defined( CINDER_GL_ES )
depthFormat.setInternalFormat( GL_DEPTH_COMPONENT16 );
#else
depthFormat.setInternalFormat( GL_DEPTH_COMPONENT32F );
depthFormat.setCompareMode( GL_COMPARE_REF_TO_TEXTURE );
#endif
depthFormat.setMagFilter( GL_LINEAR );
depthFormat.setMinFilter( GL_LINEAR );
depthFormat.setWrap( GL_CLAMP_TO_EDGE, GL_CLAMP_TO_EDGE );
depthFormat.setCompareFunc( GL_LEQUAL );
mShadowMapTex = gl::Texture2d::create( FBO_WIDTH, FBO_HEIGHT, depthFormat );
mCam.setPerspective( 40.0f, getWindowAspectRatio(), 0.5f, 500.0f );
gl::Fbo::Format fboFormat;
fboFormat.attachment( GL_DEPTH_ATTACHMENT, mShadowMapTex );
mFbo = gl::Fbo::create( FBO_WIDTH, FBO_HEIGHT, fboFormat );
// Set up camera from the light's viewpoint
mLightCam.setPerspective( 100.0f, mFbo->getAspectRatio(), 0.5f, 10.0f );
mLightCam.lookAt( mLightPos, vec3( 0.0f ) );
try {
#if defined( CINDER_GL_ES )
mGlsl = gl::GlslProg::create( loadAsset( "shadow_shader_es2.vert" ), loadAsset( "shadow_shader_es2.frag" ) );
#else
mGlsl = gl::GlslProg::create( loadAsset( "shadow_shader.vert" ), loadAsset( "shadow_shader.frag" ) );
#endif
}
catch ( Exception &exc ) {
CI_LOG_EXCEPTION( "glsl load failed", exc );
std::terminate();
}
auto teapot = geom::Teapot().subdivisions( 8 );
mTeapotBatch = gl::Batch::create( teapot, gl::getStockShader( gl::ShaderDef() ) );
mTeapotShadowedBatch = gl::Batch::create( teapot, mGlsl );
auto floor = geom::Cube().size( 10.0f, 0.5f, 10.0f );
mFloorBatch = gl::Batch::create( floor, gl::getStockShader( gl::ShaderDef() ) );
mFloorShadowedBatch = gl::Batch::create( floor, mGlsl );
gl::enableDepthRead();
gl::enableDepthWrite();
}