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NAME

       SoPerspectiveCamera -

       The SoPerspectiveCamera class defines a camera node with perspective
       rendering.

       For realistic looking 3D scene, the geometry should be rendered with
       perspective calculations. Use this camera type to accomplish this.

SYNOPSIS

       #include <Inventor/nodes/SoPerspectiveCamera.h>

       Inherits SoCamera.

   Public Member Functions
       SoPerspectiveCamera (void)
       virtual void scaleHeight (float scalefactor)
       virtual SbViewVolume getViewVolume (float useaspectratio=0.0f) const

   Static Public Member Functions
       static void initClass (void)

   Public Attributes
       SoSFFloat heightAngle

   Protected Member Functions
       virtual ~SoPerspectiveCamera ()
       virtual void viewBoundingBox (const SbBox3f &box, float aspect, float
           slack)

Detailed Description

       The SoPerspectiveCamera class defines a camera node with perspective
       rendering.

       For realistic looking 3D scene, the geometry should be rendered with
       perspective calculations. Use this camera type to accomplish this.

       FILE FORMAT/DEFAULTS:

           PerspectiveCamera {
               viewportMapping ADJUST_CAMERA
               position 0 0 1
               orientation 0 0 1  0
               nearDistance 1
               farDistance 10
               aspectRatio 1
               focalDistance 5
               heightAngle 0.78539819
           }

Constructor & Destructor Documentation

   SoPerspectiveCamera::SoPerspectiveCamera (void) Constructor.
   SoPerspectiveCamera::~SoPerspectiveCamera () [protected, virtual]
       Destructor.

Member Function Documentation

   void SoPerspectiveCamera::initClass (void) [static] Sets up initialization
       for data common to all instances of this class, like submitting
       necessary information to the Coin type system.
       Reimplemented from SoCamera.

   void SoPerspectiveCamera::scaleHeight (float scalefactor) [virtual] Scale
       the SoPerspectiveCamera::heightAngle field by multiplying with
       scalefactor.
       Implements SoCamera.

   SbViewVolume SoPerspectiveCamera::getViewVolume (float useaspectratio =
       0.0f) const [virtual] Returns total view volume covered by the camera
       under the current settings.
       This view volume is not adjusted to account for viewport mapping. If
       you want the same view volume as the one used during rendering, you
       should do something like this:

         SbViewVolume vv;
         float aspectratio = myviewport.getViewportAspectRatio();

         switch (camera->viewportMapping.getValue()) {
         case SoCamera::CROP_VIEWPORT_FILL_FRAME:
         case SoCamera::CROP_VIEWPORT_LINE_FRAME:
         case SoCamera::CROP_VIEWPORT_NO_FRAME:
           vv = camera->getViewVolume(0.0f);
           break;
         case SoCamera::ADJUST_CAMERA:
           vv = camera->getViewVolume(aspectratio);
           if (aspectratio < 1.0f) vv.scale(1.0f / aspectratio);
           break;
         case SoCamera::LEAVE_ALONE:
           vv = camera->getViewVolume(0.0f);
           break;
         default:
           assert(0 && "unknown viewport mapping");
           break;
         }

         .fi

       Also, for the CROPPED viewport mappings, the viewport might be changed if the viewport aspect ratio is not equal to the camera aspect ratio. See SoCamera::getView() to see how this is done.

       Implements SoCamera.

   void SoPerspectiveCamera::viewBoundingBox (const SbBox3f & box, float
       aspect, float slack) [protected, virtual] Convenience method for
       setting up the camera definition to cover the given bounding box with
       the given aspect ratio. Multiplies the exact dimensions with a slack
       factor to have some space between the rendered model and the borders of
       the rendering area.
       If you define your own camera node class, be aware that this method
       should not set the orientation field of the camera, only the position,
       focal distance and near and far clipping planes.

       Implements SoCamera.

Member Data Documentation

   SoSFFloat SoPerspectiveCamera::heightAngle The vertical angle of the
       viewport, also known as ’field of view’. Default value is 45° (note:
       value is specified in radians).

Author

       Generated automatically by Doxygen for Coin from the source code.