本文整理汇总了C++中ImageLayerVector::at方法的典型用法代码示例。如果您正苦于以下问题：C++ ImageLayerVector::at方法的具体用法？C++ ImageLayerVector::at怎么用？C++ ImageLayerVector::at使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类ImageLayerVector的用法示例。
在下文中一共展示了ImageLayerVector::at方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: Depth
// Generates the main shader code for rendering the terrain.
void
RexTerrainEngineNode::updateState()
{
if ( _batchUpdateInProgress )
{
_stateUpdateRequired = true;
}
else
{
osg::StateSet* terrainStateSet = _terrain->getOrCreateStateSet(); // everything
osg::StateSet* surfaceStateSet = getSurfaceStateSet(); // just the surface
//terrainStateSet->setRenderBinDetails(0, "SORT_FRONT_TO_BACK");
// required for multipass tile rendering to work
surfaceStateSet->setAttributeAndModes(
new osg::Depth(osg::Depth::LEQUAL, 0, 1, true) );
surfaceStateSet->setAttributeAndModes(
new osg::CullFace(), osg::StateAttribute::ON);
// activate standard mix blending.
terrainStateSet->setAttributeAndModes(
new osg::BlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA),
osg::StateAttribute::ON );
// install patch param if we are tessellation on the GPU.
if ( _terrainOptions.gpuTessellation() == true )
{
#ifdef HAVE_PATCH_PARAMETER
terrainStateSet->setAttributeAndModes( new osg::PatchParameter(3) );
#endif
}
// install shaders, if we're using them.
if ( Registry::capabilities().supportsGLSL() )
{
Shaders package;
VirtualProgram* terrainVP = VirtualProgram::getOrCreate(terrainStateSet);
terrainVP->setName( "Rex Terrain" );
package.load(terrainVP, package.ENGINE_VERT_MODEL);
surfaceStateSet->addUniform(new osg::Uniform("oe_terrain_color", _terrainOptions.color().get()));
if (_terrainOptions.enableBlending() == true)
{
surfaceStateSet->setDefine("OE_TERRAIN_BLEND_IMAGERY");
}
// Funtions that affect only the terrain surface:
VirtualProgram* surfaceVP = VirtualProgram::getOrCreate(surfaceStateSet);
surfaceVP->setName("Rex Surface");
// Functions that affect the terrain surface only:
package.load(surfaceVP, package.ENGINE_VERT_VIEW);
package.load(surfaceVP, package.ENGINE_FRAG);
// Elevation?
if (this->elevationTexturesRequired())
{
surfaceStateSet->setDefine("OE_TERRAIN_RENDER_ELEVATION");
}
// Normal mapping shaders:
if ( this->normalTexturesRequired() )
{
package.load(surfaceVP, package.NORMAL_MAP_VERT);
package.load(surfaceVP, package.NORMAL_MAP_FRAG);
surfaceStateSet->setDefine("OE_TERRAIN_RENDER_NORMAL_MAP");
}
// Morphing?
if (_terrainOptions.morphTerrain() == true ||
_terrainOptions.morphImagery() == true)
{
package.load(surfaceVP, package.MORPHING_VERT);
if (_terrainOptions.morphImagery() == true)
{
surfaceStateSet->setDefine("OE_TERRAIN_MORPH_IMAGERY");
}
if (_terrainOptions.morphTerrain() == true)
{
surfaceStateSet->setDefine("OE_TERRAIN_MORPH_GEOMETRY");
}
}
// assemble color filter code snippets.
bool haveColorFilters = false;
{
// Color filter frag function:
std::string fs_colorfilters =
"#version " GLSL_VERSION_STR "\n"
GLSL_DEFAULT_PRECISION_FLOAT "\n"
"uniform int oe_layer_uid; \n"
"$COLOR_FILTER_HEAD"
"void oe_rexEngine_applyFilters(inout vec4 color) \n"
"{ \n"
//.........这里部分代码省略.........