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rtVTK
0.6.0
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00001 00002 /****************************************************************************** 00003 * Copyright (c) 2012, Grove City College 00004 * All rights reserved. 00005 * 00006 * Redistribution and use in source and binary forms, with or without 00007 * modification, are permitted provided that the following conditions are 00008 * met: 00009 * 00010 * * Redistributions of source code must retain the above copyright 00011 * notice, this list of conditions and the following disclaimer. 00012 * 00013 * * Redistributions in binary form must reproduce the above copyright 00014 * notice, this list of conditions and the following disclaimer in 00015 * the documentation and/or other materials provided with the 00016 * distribution. 00017 * 00018 * * Neither the name of Grove City College nor the names of its 00019 * contributors may be used to endorse or promote products derived 00020 * from this software without specific prior written permission. 00021 * 00022 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 00023 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 00024 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 00025 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 00026 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 00027 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 00028 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 00029 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 00030 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 00031 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 00032 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00033 * 00034 */ 00035 00036 00037 #ifndef Core_uiCore_Camera_h 00038 #define Core_uiCore_Camera_h 00039 00040 #include <Math/Math.h> 00041 #include <Math/Quaternion.h> 00042 00043 #ifdef WIN32 00044 # undef near 00045 # undef far 00046 #endif // WIN32 00047 00048 namespace uiCore 00049 { 00050 00052 // Using directives 00053 00054 using MathF::Point; 00055 using MathF::Vector; 00056 00057 using Math::Cross; 00058 using Math::Quaternion; 00059 00060 // Eye == "Rotate about position". 00061 // LookAt == "Rotate about focal point". 00062 enum CameraMode { Eye, Lookat, numCameraModes }; 00063 00065 // Class definition 00070 class Camera 00071 { 00072 public: 00073 Camera(const Point& = Point(0, 0, 5), 00074 const Point& = Point(0, 0, 0), 00075 const Vector& = Vector(0, 1, 0), 00076 float = 45.f, 00077 float = 0.1f, 00078 float = 100.f, 00079 CameraMode = Lookat); 00080 00081 ~Camera() { /* no-op */ } 00082 00083 void reset(); 00084 00085 void moveCam(const Vector&); 00086 void rotateCam(const Vector&, float); 00087 void setLookMode(CameraMode); 00088 00089 void setFOV(float fov_) { fov = fov_; } 00090 void setNear(float near_) { near = near_; } 00091 void setFar(float far_) { far = far_; } 00092 00093 Point getEye() const 00094 { 00095 return (mode == Eye ? origin : origin - rotation.rotateV(move)); 00096 } 00097 00098 Point getLook() const 00099 { 00100 return (mode == Lookat ? 00101 origin + rotation.rotateV(refIn*move.length() - move) : 00102 origin + rotation.rotateV(move)); 00103 } 00104 00105 Point getRotPt() const 00106 { 00107 return (mode == Lookat ? origin : origin + rotation.rotateV(move)); 00108 } 00109 00110 Vector getUp() const { return rotation.rotateV(refUp); } 00111 float getFOV() const { return fov; } 00112 float getNear() const { return near; } 00113 float getFar() const { return far; } 00114 CameraMode getMode() const { return mode; } 00115 00116 private: 00121 Point initPos; 00122 Point initLook; 00123 Vector initUp; 00124 float initFOV; 00126 00127 float fov; 00128 float near; 00129 float far; 00130 00132 CameraMode mode; 00133 00134 static const Vector refUp; 00135 static const Vector refIn; 00136 static const Vector refSide; 00137 00143 Point origin; 00144 Quaternion rotation; 00146 00147 Vector move; 00148 }; // class Camera 00149 00150 } // namespace uiCore 00151 00152 #endif // Core_uiCore_Camera_h