本文整理汇总了C++中SbViewVolume::getWorldToScreenScale方法的典型用法代码示例。如果您正苦于以下问题：C++ SbViewVolume::getWorldToScreenScale方法的具体用法？C++ SbViewVolume::getWorldToScreenScale怎么用？C++ SbViewVolume::getWorldToScreenScale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SbViewVolume的用法示例。
在下文中一共展示了SbViewVolume::getWorldToScreenScale方法的2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: getScaleFactor
float SoZoomTranslation::getScaleFactor(SoAction* action) const
{
// Dividing by 5 seems to work well
SbViewVolume vv = SoViewVolumeElement::get(action->getState());
float aspectRatio = SoViewportRegionElement::get(action->getState()).getViewportAspectRatio();
float scale = vv.getWorldToScreenScale(SbVec3f(0.f, 0.f, 0.f), 0.1f) / (5*aspectRatio);
return scale;
}示例2: idleCB
void SoFCCSysDragger::idleCB(void *data, SoSensor *)
{
SoFCCSysDragger *sudoThis = reinterpret_cast<SoFCCSysDragger *>(data);
assert(sudoThis->camera);
SbMatrix localToWorld = sudoThis->getLocalToWorldMatrix();
SbVec3f origin;
localToWorld.multVecMatrix(SbVec3f(0.0, 0.0, 0.0), origin);
SbViewVolume viewVolume = sudoThis->camera->getViewVolume();
float radius = sudoThis->draggerSize.getValue() / 2.0;
float localScale = viewVolume.getWorldToScreenScale(origin, radius);
SbVec3f scaleVector(localScale, localScale, localScale);
SoScale *localScaleNode = SO_GET_ANY_PART(sudoThis, "scaleNode", SoScale);
localScaleNode->scaleFactor.setValue(scaleVector);
sudoThis->autoScaleResult.setValue(localScale);
}