[2753] | 1 | #ifndef __CAMERA_H
|
---|
| 2 | #define __CAMERA_H
|
---|
| 3 |
|
---|
| 4 | #include "Vector3.h"
|
---|
| 5 | #include "AxisAlignedBox3.h"
|
---|
[2755] | 6 | #include "Plane3.h"
|
---|
[2753] | 7 |
|
---|
| 8 |
|
---|
[2776] | 9 | namespace CHCDemoEngine
|
---|
[2755] | 10 | {
|
---|
[2753] | 11 |
|
---|
[2911] | 12 | class Matrix4x4;
|
---|
| 13 | class Polyhedron;
|
---|
[2753] | 14 |
|
---|
[3062] | 15 |
|
---|
[2911] | 16 | /** Class representing a frustum.
|
---|
| 17 | */
|
---|
| 18 | class Frustum
|
---|
[2753] | 19 | {
|
---|
[2911] | 20 | friend class Camera;
|
---|
| 21 |
|
---|
[2753] | 22 | public:
|
---|
[2911] | 23 |
|
---|
[3147] | 24 | enum {LEFT_PLANE, RIGHT_PLANE, BOTTOM_PLANE, TOP_PLANE, NEAR_PLANE, FAR_PLANE};
|
---|
| 25 |
|
---|
[2911] | 26 | Frustum() {};
|
---|
| 27 |
|
---|
| 28 | Frustum(const Matrix4x4 &trafo);
|
---|
| 29 |
|
---|
| 30 | /** Resizes the current frustum so that it fully encloses the given polyhedron
|
---|
[2755] | 31 | */
|
---|
[2911] | 32 | void EnclosePolyhedron(const Polyhedron &polyhedron);
|
---|
[2753] | 33 |
|
---|
[2911] | 34 | void ExtractTransformation(Matrix4x4 &m) const;
|
---|
| 35 |
|
---|
| 36 |
|
---|
| 37 | /// the 6 clip planes
|
---|
| 38 | Plane3 mClipPlanes[6];
|
---|
| 39 | };
|
---|
| 40 |
|
---|
| 41 |
|
---|
[3061] | 42 | /** Classs representing a camera.
|
---|
| 43 | */
|
---|
[2911] | 44 | class Camera
|
---|
| 45 | {
|
---|
| 46 | public:
|
---|
[3061] | 47 | /** Default constructor.
|
---|
| 48 | */
|
---|
[2753] | 49 | Camera();
|
---|
[2932] | 50 | /** Sets the current camera position.
|
---|
| 51 | */
|
---|
[2753] | 52 | void SetPosition(const Vector3 &pos);
|
---|
[3061] | 53 | /** See set.
|
---|
| 54 | */
|
---|
[2753] | 55 | inline Vector3 GetPosition() const { return mPosition; }
|
---|
[3061] | 56 | /** Returns view direction.
|
---|
| 57 | */
|
---|
[2796] | 58 | Vector3 GetDirection() const;
|
---|
[3061] | 59 | /** Returns up vector.
|
---|
| 60 | */
|
---|
[2796] | 61 | Vector3 GetUpVector() const;
|
---|
[3061] | 62 | /** Returns right vector.
|
---|
| 63 | */
|
---|
[2796] | 64 | Vector3 GetRightVector() const;
|
---|
[2753] | 65 |
|
---|
[2911] | 66 | Vector3 GetBaseDirection() const;
|
---|
| 67 | Vector3 GetBaseUpVector() const;
|
---|
| 68 | Vector3 GetBaseRightVector() const;
|
---|
[3061] | 69 | /** Sets up viewing matrices in for opengl rendering
|
---|
| 70 | */
|
---|
[2756] | 71 | void SetupCameraView();
|
---|
[2826] | 72 | /** Returns the current projection matrix.
|
---|
| 73 | */
|
---|
[3063] | 74 | void GetProjectionMatrix(Matrix4x4 &mat) const;
|
---|
[2826] | 75 | /** Returns the current model view matrix.
|
---|
| 76 | */
|
---|
[2986] | 77 | void GetModelViewMatrix(Matrix4x4 &mat) const;
|
---|
[3045] | 78 | /** Returns the view orientation (the model view matrix without the translation)
|
---|
| 79 | */
|
---|
[2986] | 80 | void GetViewOrientationMatrix(Matrix4x4 &mat) const;
|
---|
[2806] | 81 | /** Returns the near plane.
|
---|
| 82 | */
|
---|
[2764] | 83 | inline float GetNear() const { return mNear; }
|
---|
[2806] | 84 | /** Returns the far plane.
|
---|
| 85 | */
|
---|
| 86 | inline float GetFar() const { return mFar; }
|
---|
| 87 | /** Sets the near plane
|
---|
| 88 | */
|
---|
[2764] | 89 | void SetNear(float nearDist);
|
---|
[2806] | 90 | /** Sets the far plane.
|
---|
| 91 | */
|
---|
| 92 | void SetFar(float farDist);
|
---|
[3061] | 93 | /** Set yaw (rotation around vertical axis.
|
---|
| 94 | */
|
---|
[2796] | 95 | void Yaw(float angle);
|
---|
[3061] | 96 | /** Set pitch.
|
---|
| 97 | */
|
---|
[2796] | 98 | void Pitch(float angle);
|
---|
[3061] | 99 | /** Returns pitch.
|
---|
| 100 | */
|
---|
[2806] | 101 | float GetPitch() const { return mPitch; }
|
---|
[3061] | 102 | /** Returns yaw.
|
---|
| 103 | */
|
---|
[2806] | 104 | float GetYaw() const { return mYaw; }
|
---|
[3061] | 105 | /** Resets pitch and yaw.
|
---|
| 106 | */
|
---|
[2838] | 107 | void ResetPitchAndYaw() { mPitch = 0; mYaw = 0; }
|
---|
[3061] | 108 | /** Sets the view direction.
|
---|
[2829] | 109 | */
|
---|
| 110 | void SetDirection(const Vector3 &direction);
|
---|
[3061] | 111 | /** Sets up projection matrix in OpenGl.
|
---|
| 112 | */
|
---|
| 113 | void SetupProjection();
|
---|
| 114 | /** Sets up view + projection matrix in OpenGl.
|
---|
| 115 | */
|
---|
| 116 | void SetupViewProjection();
|
---|
[3062] | 117 | /** Calculates a frustum from the projection and the modelview matrix.
|
---|
| 118 | */
|
---|
| 119 | void CalcFrustum(Frustum &frustum);
|
---|
[2796] | 120 |
|
---|
[2753] | 121 | protected:
|
---|
| 122 |
|
---|
[3063] | 123 | virtual void UpdateProjectionMatrix() = 0;
|
---|
| 124 |
|
---|
[2796] | 125 | void Precompute(const Vector3 &direction);
|
---|
[2753] | 126 |
|
---|
[2796] | 127 | void CalculateFromPitchAndYaw();
|
---|
[2753] | 128 |
|
---|
[2780] | 129 |
|
---|
[2796] | 130 | ////////////////
|
---|
| 131 | //-- members
|
---|
| 132 |
|
---|
[2764] | 133 | float mNear;
|
---|
[2796] | 134 | float mFar;
|
---|
[3061] | 135 |
|
---|
[2796] | 136 | Matrix4x4 mBaseOrientation;
|
---|
| 137 | Matrix4x4 mViewOrientation;
|
---|
| 138 |
|
---|
[3063] | 139 | Matrix4x4 mProjection;
|
---|
| 140 |
|
---|
[2796] | 141 | float mPitch;
|
---|
| 142 | float mYaw;
|
---|
| 143 |
|
---|
| 144 | Vector3 mPosition;
|
---|
[3062] | 145 | };
|
---|
[3061] | 146 |
|
---|
[3062] | 147 |
|
---|
| 148 | /** Classs representing a perspective camera.
|
---|
| 149 | */
|
---|
| 150 | class PerspectiveCamera: public Camera
|
---|
| 151 | {
|
---|
| 152 | friend class ShadowMap;
|
---|
| 153 |
|
---|
| 154 | public:
|
---|
| 155 | /** Default constructor.
|
---|
| 156 | */
|
---|
| 157 | PerspectiveCamera();
|
---|
| 158 | /** Camera taking the image width and height and the field of view.
|
---|
| 159 | */
|
---|
| 160 | PerspectiveCamera(float aspect, float fieldOfView = 90.f);
|
---|
| 161 | /** Returns the field of view.
|
---|
| 162 | */
|
---|
| 163 | inline float GetFov() const { return mFOVy; }
|
---|
| 164 | /** Returns the aspect ratio.
|
---|
| 165 | */
|
---|
| 166 | inline float GetAspect() const { return mAspect; }
|
---|
| 167 | /** Computes the extremal points of this frustum.
|
---|
| 168 | If farthestVisibleDistance is nearer than the far plane,
|
---|
| 169 | it is used to define the far plane instead.
|
---|
| 170 | */
|
---|
| 171 | void ComputePoints(Vector3 &ftl, Vector3 &ftr, Vector3 &fbl, Vector3 &fbr,
|
---|
| 172 | Vector3 &ntl, Vector3 &ntr, Vector3 &nbl, Vector3 &nbr,
|
---|
| 173 | float farthestVisibleDistance = 1e25f) const;
|
---|
| 174 | /** Returns frustum as polyhedron.
|
---|
| 175 | */
|
---|
| 176 | Polyhedron *ComputeFrustum(float farthestVisibleDistance = 1e25f) const;
|
---|
| 177 |
|
---|
| 178 |
|
---|
| 179 | protected:
|
---|
[3063] | 180 | /** Calculates the current projection matrix.
|
---|
| 181 | */
|
---|
| 182 | virtual void UpdateProjectionMatrix();
|
---|
[3062] | 183 |
|
---|
| 184 | void ComputePointsInternal(Vector3 &ftl, Vector3 &ftr, Vector3 &fbl, Vector3 &fbr,
|
---|
| 185 | Vector3 &ntl, Vector3 &ntr, Vector3 &nbl, Vector3 &nbr,
|
---|
| 186 | const Vector3 &view, const Vector3 &right, const Vector3 &up,
|
---|
| 187 | const Vector3 &pos,
|
---|
| 188 | float farthestVisibleDistance = 1e25f) const;
|
---|
| 189 |
|
---|
| 190 | ////////////////
|
---|
| 191 | //-- members
|
---|
| 192 |
|
---|
| 193 | float mFOVy;
|
---|
[3061] | 194 | float mAspect;
|
---|
[2753] | 195 | };
|
---|
| 196 |
|
---|
[3102] | 197 | /** Classs representing an orthographics camera.
|
---|
| 198 | */
|
---|
| 199 | class OrthoCamera: public Camera
|
---|
| 200 | {
|
---|
| 201 | friend class ShadowMap;
|
---|
[3062] | 202 |
|
---|
[3102] | 203 | public:
|
---|
| 204 | /** Default constructor.
|
---|
| 205 | */
|
---|
| 206 | OrthoCamera();
|
---|
| 207 | /** Camera taking the frustum left, right, bottom, top.
|
---|
| 208 | */
|
---|
| 209 | OrthoCamera(float l, float r, float b, float t);
|
---|
| 210 |
|
---|
| 211 | /** Camera taking the frustum left, right, bottom, top, near, far.
|
---|
| 212 | */
|
---|
| 213 | OrthoCamera(float l, float r, float b, float t, float n, float f);
|
---|
| 214 |
|
---|
| 215 |
|
---|
| 216 | protected:
|
---|
| 217 | /** Calculates the current projection matrix.
|
---|
| 218 | */
|
---|
| 219 | virtual void UpdateProjectionMatrix();
|
---|
| 220 |
|
---|
| 221 |
|
---|
| 222 | //////////
|
---|
| 223 | //-- members
|
---|
| 224 |
|
---|
| 225 | float mLeft;
|
---|
| 226 | float mRight;
|
---|
| 227 | float mBottom;
|
---|
| 228 | float mTop;
|
---|
| 229 | };
|
---|
[2753] | 230 | }
|
---|
| 231 | #endif
|
---|