public
class
Camera
extends Object
| java.lang.Object | |
| ↳ | android.graphics.Camera |
A camera instance can be used to compute 3D transformations and
generate a matrix that can be applied, for instance, on a
Canvas.
Public constructors | |
|---|---|
Camera()
Creates a new camera, with empty transformations. |
|
Public methods | |
|---|---|
void
|
applyToCanvas(Canvas canvas)
Computes the matrix corresponding to the current transformation and applies it to the specified Canvas. |
float
|
dotWithNormal(float dx, float dy, float dz)
|
float
|
getLocationX()
Gets the x location of the camera. |
float
|
getLocationY()
Gets the y location of the camera. |
float
|
getLocationZ()
Gets the z location of the camera. |
void
|
getMatrix(Matrix matrix)
Computes the matrix corresponding to the current transformation and copies it to the supplied matrix object. |
void
|
restore()
Restores the saved state, if any. |
void
|
rotate(float x, float y, float z)
Applies a rotation transform around all three axis. |
void
|
rotateX(float deg)
Applies a rotation transform around the X axis. |
void
|
rotateY(float deg)
Applies a rotation transform around the Y axis. |
void
|
rotateZ(float deg)
Applies a rotation transform around the Z axis. |
void
|
save()
Saves the camera state. |
void
|
setLocation(float x, float y, float z)
Sets the location of the camera. |
void
|
translate(float x, float y, float z)
Applies a translation transform on all three axis. |
Protected methods | |
|---|---|
void
|
finalize()
Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. |
Inherited methods | |
|---|---|
 From
class
java.lang.Object
| |
void applyToCanvas (Canvas canvas)
Computes the matrix corresponding to the current transformation and applies it to the specified Canvas.
| Parameters | |
|---|---|
canvas |
Canvas:
The Canvas to set the transform matrix onto
|
Developers
float dotWithNormal (float dx,
float dy,
float dz)
| Parameters | |
|---|---|
dx |
float
|
dy |
float
|
dz |
float
|
| Returns | |
|---|---|
float |
|
float getLocationX ()
Gets the x location of the camera.
| Returns | |
|---|---|
float |
|
See also:
float getLocationY ()
Gets the y location of the camera.
| Returns | |
|---|---|
float |
|
See also:
float getLocationZ ()
Gets the z location of the camera.
| Returns | |
|---|---|
float |
|
See also:
void getMatrix (Matrix matrix)
Computes the matrix corresponding to the current transformation and copies it to the supplied matrix object.
| Parameters | |
|---|---|
matrix |
Matrix:
The matrix to copy the current transforms into
|
void rotate (float x,
float y,
float z)
Applies a rotation transform around all three axis.
| Parameters | |
|---|---|
x |
float:
The angle of rotation around the X axis, in degrees |
y |
float:
The angle of rotation around the Y axis, in degrees |
z |
float:
The angle of rotation around the Z axis, in degrees |
void rotateX (float deg)
Applies a rotation transform around the X axis.
| Parameters | |
|---|---|
deg |
float:
The angle of rotation around the X axis, in degrees |
void rotateY (float deg)
Applies a rotation transform around the Y axis.
| Parameters | |
|---|---|
deg |
float:
The angle of rotation around the Y axis, in degrees |
void rotateZ (float deg)
Applies a rotation transform around the Z axis.
| Parameters | |
|---|---|
deg |
float:
The angle of rotation around the Z axis, in degrees |
void save ()
Saves the camera state. Each save should be balanced
with a call to restore().
See also:
void setLocation (float x,
float y,
float z)
Sets the location of the camera. The default location is set at 0, 0, -8.
| Parameters | |
|---|---|
x |
float:
The x location of the camera |
y |
float:
The y location of the camera |
z |
float:
The z location of the camera
|
void translate (float x,
float y,
float z)
Applies a translation transform on all three axis.
| Parameters | |
|---|---|
x |
float:
The distance to translate by on the X axis |
y |
float:
The distance to translate by on the Y axis |
z |
float:
The distance to translate by on the Z axis
|
void finalize ()
Called by the garbage collector on an object when garbage collection
determines that there are no more references to the object.
A subclass overrides the finalize method to dispose of
system resources or to perform other cleanup.
The general contract of finalize is that it is invoked
if and when the JavaTM virtual
machine has determined that there is no longer any
means by which this object can be accessed by any thread that has
not yet died, except as a result of an action taken by the
finalization of some other object or class which is ready to be
finalized. The finalize method may take any action, including
making this object available again to other threads; the usual purpose
of finalize, however, is to perform cleanup actions before
the object is irrevocably discarded. For example, the finalize method
for an object that represents an input/output connection might perform
explicit I/O transactions to break the connection before the object is
permanently discarded.
The finalize method of class Object performs no
special action; it simply returns normally. Subclasses of
Object may override this definition.
The Java programming language does not guarantee which thread will
invoke the finalize method for any given object. It is
guaranteed, however, that the thread that invokes finalize will not
be holding any user-visible synchronization locks when finalize is
invoked. If an uncaught exception is thrown by the finalize method,
the exception is ignored and finalization of that object terminates.
After the finalize method has been invoked for an object, no
further action is taken until the Java virtual machine has again
determined that there is no longer any means by which this object can
be accessed by any thread that has not yet died, including possible
actions by other objects or classes which are ready to be finalized,
at which point the object may be discarded.
The finalize method is never invoked more than once by a Java
virtual machine for any given object.
Any exception thrown by the finalize method causes
the finalization of this object to be halted, but is otherwise
ignored.
| Throws | |
|---|---|
Throwable |
|