Changeset 11137 for OpenSceneGraph/trunk/src/osgShadow/ShadowMap.cpp

Timestamp:

03/01/10 14:00:04 (3 years ago)

Author:

robert

Message:

Added a ShadowTechnique::computeOrthogonalVector(const osg::Vec3& direction) const method for helping compute an appropriate
up vector to setViewMatrixAsLookAt(..) codes in osgShadow. This will addresses previous issues that occured when look vectors
co-incided with the hard coded up vectors.

Files:

• OpenSceneGraph/trunk/src/osgShadow/ShadowMap.cpp (modified) (3 diffs)

OpenSceneGraph/trunk/src/osgShadow/ShadowMap.cpp

@@ -409 +409 @@
             osg::Vec3 position(lightpos.x(), lightpos.y(), lightpos.z());
             _camera->setProjectionMatrixAsPerspective(fov, 1.0, 0.1, 1000.0);
-            _camera->setViewMatrixAsLookAt(position,position+lightDir,osg::Vec3(0.0f,1.0f,0.0f));
+            _camera->setViewMatrixAsLookAt(position,position+lightDir,computeOrthogonalVector(lightDir));
         }
         else
@@ -436 +436 @@
 
                 _camera->setProjectionMatrixAsFrustum(-right,right,-top,top,znear,zfar);
-                _camera->setViewMatrixAsLookAt(position,bb.center(),osg::Vec3(0.0f,1.0f,0.0f));
+                _camera->setViewMatrixAsLookAt(position,bb.center(),computeOrthogonalVector(bb.center()-position));
             }
             else    // directional light
@@ -458 +458 @@
 
                 _camera->setProjectionMatrixAsOrtho(-right, right, -top, top, znear, zfar);
-                _camera->setViewMatrixAsLookAt(position,bb.center(),osg::Vec3(0.0f,1.0f,0.0f));
+                _camera->setViewMatrixAsLookAt(position,bb.center(),computeOrthogonalVector(lightDir));
             }