Open Inventor Reference
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00001 /* 00002 * 00003 * Copyright (C) 2000 Silicon Graphics, Inc. All Rights Reserved. 00004 * 00005 * This library is free software; you can redistribute it and/or 00006 * modify it under the terms of the GNU Lesser General Public 00007 * License as published by the Free Software Foundation; either 00008 * version 2.1 of the License, or (at your option) any later version. 00009 * 00010 * This library is distributed in the hope that it will be useful, 00011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00013 * Lesser General Public License for more details. 00014 * 00015 * Further, this software is distributed without any warranty that it is 00016 * free of the rightful claim of any third person regarding infringement 00017 * or the like. Any license provided herein, whether implied or 00018 * otherwise, applies only to this software file. Patent licenses, if 00019 * any, provided herein do not apply to combinations of this program with 00020 * other software, or any other product whatsoever. 00021 * 00022 * You should have received a copy of the GNU Lesser General Public 00023 * License along with this library; if not, write to the Free Software 00024 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00025 * 00026 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, 00027 * Mountain View, CA 94043, or: 00028 * 00029 * http://www.sgi.com 00030 * 00031 * For further information regarding this notice, see: 00032 * 00033 * http://oss.sgi.com/projects/GenInfo/NoticeExplan/ 00034 * 00035 */ 00036 00037 00038 /* 00039 * Copyright (C) 1990,91,92 Silicon Graphics, Inc. 00040 * 00041 _______________________________________________________________________ 00042 ______________ S I L I C O N G R A P H I C S I N C . ____________ 00043 | 00044 | $Revision: 1.1.1.1 $ 00045 | 00046 | Description: 00047 | This file contains the definition of the SbSphereSectionProjector 00048 | class. This projector projects the mouse position onto the 00049 | section of a sphere that has been sliced by a plane. 00050 | 00051 | The tolerance slice can be specified as a fraction of the radius 00052 | of the sphere. The projection point will not extend beyond 00053 | the sliced portion of the sphere. 00054 | 00055 | This projector is good for trackballs that only do 00056 | pure roll when the mouse is off the sliced portion of 00057 | the sphere. 00058 | 00059 | Author(s) : Howard Look, Paul Isaacs 00060 | 00061 ______________ S I L I C O N G R A P H I C S I N C . ____________ 00062 _______________________________________________________________________ 00063 */ 00064 00065 #ifndef _SB_SPHERE_SECTION_PROJECTOR_ 00066 #define _SB_SPHERE_SECTION_PROJECTOR_ 00067 00068 #include <Inventor/projectors/SbSphereProjector.h> 00069 00072 00093 00094 00095 class INVENTOR_API SbSphereSectionProjector : public SbSphereProjector 00096 { 00097 public: 00104 SbSphereSectionProjector(float edgeTol = .9, 00105 SbBool orientToEye = TRUE); 00106 00108 SbSphereSectionProjector(const SbSphere &sph, 00109 float edgeTol = .9, 00110 SbBool orientToEye = TRUE); 00111 00113 ~SbSphereSectionProjector() {} 00114 00117 virtual SbProjector * copy() const; 00118 00122 virtual SbVec3f project(const SbVec2f &point); 00123 00125 virtual SbRotation getRotation(const SbVec3f &point1, 00126 const SbVec3f &point2); 00127 00129 void setTolerance(float edgeTol); 00130 00135 float getTolerance() const { return tolerance; } 00136 00138 void setRadialFactor(float rad = 0.0) { radialFactor = rad;} 00153 float getRadialFactor() const { return radialFactor; } 00154 00157 SbBool isWithinTolerance(const SbVec3f &point); 00158 00159 protected: 00160 00162 virtual void setupTolerance(); 00163 00165 float tolerance; 00166 float tolDist; 00167 00168 float radialFactor; 00169 00171 SbVec3f planePoint; 00172 SbVec3f planeDir; 00173 float planeDist; 00174 SbPlane tolPlane; 00175 }; 00176 00177 #endif /* _SB_SPHERE_SECTION_PROJECTOR_ */ 00178