Changeset 293 for osgVisual/trunk/src/util

Timestamp:

Jun 5, 2011, 10:33:34 PM (13 years ago)

Author:

Torben Dannhauer

Message:

 

File:

• osgVisual/trunk/src/util/visual_util.cpp (modified) (2 diffs)

osgVisual/trunk/src/util/visual_util.cpp

@@ -16 +16 @@
 
 #include <visual_util.h>
+#include <osg/Material>
 
 using namespace osgVisual;
@@ -569 +570 @@
         return(false);
 }
+
+void util::AddCylinderBetweenPoints(osg::Vec3d StartPoint, osg::Vec3d EndPoint, float radius, float length, osg::Vec4d CylinderColor, osg::Group *pAddToThisGroup)
+{
+        osg::ref_ptr<osg::Geode> geode = new osg::Geode;
+        osg::Vec3d center;
+        float height;
+        osg::ref_ptr<osg::Cylinder> cylinder;
+        osg::ref_ptr<osg::Drawable> cylinderDrawable;
+        osg::ref_ptr<osg::Material> pMaterial;
+
+        //height = (StartPoint-EndPoint).length();
+        height  = length;
+        center = osg::Vec3( (StartPoint.x() + EndPoint.x()) / 2, (StartPoint.y() + EndPoint.y()) / 2, (StartPoint.z() + EndPoint.z()) / 2);
+
+        // This is the default direction for the cylinders to face in OpenGL
+        osg::Vec3d z = osg::Vec3d(0,0,1);
+
+        // Get diff between two points you want cylinder along
+        osg::Vec3d p = StartPoint - EndPoint;
+
+        // Get CROSS product (the axis of rotation)
+        osg::Vec3d t = z ^ p;
+
+        // Get angle. length is magnitude of the vector
+        double angle = acos( (z * p) / p.length());
+
+        // Create a cylinder between the two points with the given radius
+        cylinder = new osg::Cylinder(center,radius,height);
+        cylinder->setRotation(osg::Quat(angle, osg::Vec3(t.x(), t.y(), t.z())));
+
+        cylinderDrawable = new osg::ShapeDrawable(cylinder );
+        geode->addDrawable(cylinderDrawable);
+
+        // Set the color of the cylinder that extends between the two points.
+        pMaterial = new osg::Material;
+        pMaterial->setDiffuse( osg::Material::FRONT, CylinderColor);
+        geode->getOrCreateStateSet()->setAttribute( pMaterial, osg::StateAttribute::OVERRIDE );
+
+        // Add the cylinder between the two points to an existing group
+        pAddToThisGroup->addChild(geode);
+}