1 #ifndef __DALI_CAMERA_ACTOR_H__
2 #define __DALI_CAMERA_ACTOR_H__
5 // Copyright (c) 2014 Samsung Electronics Co., Ltd.
7 // Licensed under the Flora License, Version 1.0 (the License);
8 // you may not use this file except in compliance with the License.
9 // You may obtain a copy of the License at
11 // http://floralicense.org/license/
13 // Unless required by applicable law or agreed to in writing, software
14 // distributed under the License is distributed on an AS IS BASIS,
15 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 // See the License for the specific language governing permissions and
17 // limitations under the License.
21 * @addtogroup CAPI_DALI_ACTORS_MODULE
25 #include <dali/public-api/actors/actor.h>
27 namespace Dali DALI_IMPORT_API
30 namespace Internal DALI_INTERNAL
39 * @brief Type determines how camera operates.
43 FREE_LOOK, ///< Camera orientation is taken from CameraActor
44 LOOK_AT_TARGET, ///< Camera is oriented to always look at a target
48 * @brief Projection modes.
52 PERSPECTIVE_PROJECTION, ///< Distance causes foreshortening; objects further from the camera appear smaller
53 ORTHOGRAPHIC_PROJECTION, ///< Relative distance from the camera does not affect the size of objects
59 * @brief Controls a camera.
61 * Allows the developer to use actor semantics to control a camera.
63 * There are two types of camera actor, LookAt and FreeLook. A LookAt
64 * camera actor ignores the actor rotation, and instead points towards
65 * TargetPosition in world coordinates. This is the default behaviour.
67 * A FreeLook camera uses the camera actor's world rotation to control
68 * where the camera is looking. If no rotation is specified, then the camera
69 * looks along the negative Z axis.
72 class CameraActor : public Actor
76 // Default Properties; additional to Actor properties
77 static const Property::Index TYPE; ///< Property::STRING, // "type" // Not animatable
78 static const Property::Index PROJECTION_MODE; ///< Property::STRING, // "projection-mode" // Not animatable
79 static const Property::Index FIELD_OF_VIEW; ///< Property::FLOAT, // "field-of-view" // Not animatable
80 static const Property::Index ASPECT_RATIO; ///< Property::FLOAT, // "aspect-ratio" // Not animatable
81 static const Property::Index NEAR_PLANE_DISTANCE; ///< Property::FLOAT, // "near-plane-distance" // Not animatable
82 static const Property::Index FAR_PLANE_DISTANCE; ///< Property::FLOAT, // "far-plane-distance" // Not animatable
83 static const Property::Index LEFT_PLANE_DISTANCE; ///< Property::FLOAT, // "left-plane-distance" // Not animatable
84 static const Property::Index RIGHT_PLANE_DISTANCE; ///< Property::FLOAT, // "right-plane-distance" // Not animatable
85 static const Property::Index TOP_PLANE_DISTANCE; ///< Property::FLOAT, // "top-plane-distance" // Not animatable
86 static const Property::Index BOTTOM_PLANE_DISTANCE; ///< Property::FLOAT, // "bottom-plane-distance"// Not animatable
87 static const Property::Index TARGET_POSITION; ///< Property::VECTOR3, // "target" // Not animatable
88 static const Property::Index PROJECTION_MATRIX; ///< Property::MATRIX, // "projection-matrix" // Constraint input, not animatable
89 static const Property::Index VIEW_MATRIX; ///< Property::MATRIX, // "view-matrix" // constraint input, not abimatable
90 static const Property::Index INVERT_Y_AXIS; ///< Property::BOOLEAN, // "invert-y-axis" // Not animatable
93 * @brief Create an uninitialized CameraActor handle.
95 * Initialise it using CameraActor::New(). Calling member functions
96 * with an uninitialized Dali::Object is not allowed.
101 * @brief Create a CameraActor object.
103 * Sets the default camera perspective projection for the stage's size. @see SetPerspectiveProjection().
104 * @return the newly created camera actor.
106 static CameraActor New();
109 * @brief Create a CameraActor object.
111 * Sets the default camera perspective projection for the given canvas size. @see SetPerspectiveProjection().
113 * @param[in] size The canvas size.
114 * @return the newly created camera actor.
116 static CameraActor New( const Size& size );
119 * @brief Downcast an Object handle to CameraActor.
121 * If handle points to a CameraActor the downcast produces valid
122 * handle. If not the returned handle is left uninitialized.
123 * @param[in] handle to An object
124 * @return handle to a CameraActor or an uninitialized handle
126 static CameraActor DownCast( BaseHandle handle );
129 * @brief Virtual destructor.
131 * Dali::Object derived classes typically do not contain member data.
133 virtual ~CameraActor();
136 * @copydoc Dali::BaseHandle::operator=
138 using BaseHandle::operator=;
141 * @brief Set the camera type.
142 * The default type is Dali::Camera::LookAtTarget
143 * @param[in] type The camera type
145 void SetType( Dali::Camera::Type type );
148 * @brief Get the type of the camera.
150 * @return the type of camera
152 Dali::Camera::Type GetType() const;
155 * @brief Set the projection mode.
157 * @param[in] mode One of PerspectiveProjection or OrthographicProjection
159 void SetProjectionMode( Dali::Camera::ProjectionMode mode );
162 * @brief Get the projection mode.
164 * @return One of PerspectiveProjection or OrthographicProjection
166 Dali::Camera::ProjectionMode GetProjectionMode() const;
169 * @brief Set the field of view.
171 * @param[in] fieldOfView The field of view in radians
173 void SetFieldOfView( float fieldOfView );
176 * @brief Get the field of view in Radians.
178 * The default field of view is 45 degrees
179 * @return The field of view in radians
181 float GetFieldOfView( );
184 * @brief Set the aspect ratio.
186 * @param[in] aspectRatio The aspect ratio
188 void SetAspectRatio( float aspectRatio );
191 * @brief Get the aspect ratio of the camera.
193 * The default aspect ratio is 4.0f/3.0f
194 * @return the aspect ratio
196 float GetAspectRatio( );
199 * @brief Sets the near clipping plane distance.
201 * @param[in] nearClippingPlane distance of the near clipping plane
203 void SetNearClippingPlane( float nearClippingPlane );
206 * @brief Get the near clipping plane distance.
208 * The default near clipping plane is 800.0f, to match the default screen height
209 * Reduce this value to see objects closer to the camera
210 * @return the near clipping plane value
212 float GetNearClippingPlane( );
215 * @brief Sets the far clipping plane distance.
217 * @param[in] farClippingPlane distance of the far clipping plane
219 void SetFarClippingPlane( float farClippingPlane );
222 * @brief Get the far clipping plane distance.
224 * The default value is the default near clipping plane + (0xFFFF>>4)
225 * @return the far clipping plane value
227 float GetFarClippingPlane( );
230 * @brief Set the target position of the camera.
232 * @pre Camera type is LookAtTarget
233 * @param[in] targetPosition The position of the target to look at
235 void SetTargetPosition( const Vector3& targetPosition );
238 * @brief Get Camera Target position.
240 * The target position is Vector3::ZERO
241 * @pre Camera type is LookAtTarget
242 * @return The target position of the camera
244 Vector3 GetTargetPosition() const;
247 * @brief Request for an inversion on the Y axis on the projection calculation.
249 * The default value is not inverted.
250 * @param[in] invertYAxis True if the Y axis should be inverted
252 void SetInvertYAxis(bool invertYAxis);
255 * @brief Get whether the Y axis is inverted.
257 * @return True if the Y axis is inverted, false otherwise
259 bool GetInvertYAxis();
262 * @brief Sets the default camera perspective projection for the given canvas size.
264 * Sets the near and far clipping planes, the field of view, the aspect ratio
265 * and the Z position of the actor based on the canvas size so that 1 unit in
266 * XY (z=0) plane is 1 pixel on screen.
268 * If the canvas size is ZERO, it sets the default camera perspective
269 * projection for the stage's size.
271 * @pre If size is non ZERO, \e width and \e height must be greater than zero.
273 * @param[in] size The canvas size.
275 void SetPerspectiveProjection( const Size& size );
278 * @brief Sets the camera projection to use orthographic projection.
280 * The XY plane is centered on the camera axis. The units in the X/Y
281 * plane directly equate to pixels on an equivalently sized
284 * The Z position of the actor, and the near and far clip planes of the
285 * bounding box match those that would be created by using
286 * SetPerspectiveProjection with the same size.
288 * @param[in] size Size of XY plane (normal to camera axis)
290 void SetOrthographicProjection( const Size& size );
293 * @brief Sets the camera projection to use orthographic projection with the given clip planes.
295 * This does not change the Z value of the camera actor.
297 * @param[in] left Distance to left clip plane (normal to camera axis)
298 * @param[in] right Distance to right clip plane (normal to camera axis)
299 * @param[in] top Distance to top clip plane (normal to camera axis)
300 * @param[in] bottom Distance to bottom clip plane (normal to camera axis)
301 * @param[in] near Distance to the near clip plane (along camera axis)
302 * @param[in] far Distance to the far clip plane (along camera axis)
304 void SetOrthographicProjection( float left, float right, float top, float bottom, float near, float far );
306 public: // Not intended for use by Application developers
308 * @brief This constructor is used by Dali New() methods.
310 * @param [in] actor A pointer to a newly allocated Dali resource
312 explicit DALI_INTERNAL CameraActor(Internal::CameraActor* actor);
321 #endif // __DALI_CAMERA_ACTOR_H__