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ScissorStack (libgdx API)
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com.badlogic.gdx.scenes.scene2d.utils</FONT>
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Class ScissorStack</H2>
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<PRE>
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java.lang.Object
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  <IMG SRC="../../../../../../resources/inherit.gif" ALT="extended by "><B>com.badlogic.gdx.scenes.scene2d.utils.ScissorStack</B>
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<DT><PRE>public class <B>ScissorStack</B><DT>extends java.lang.Object</DL>
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</PRE>
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<P>
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A stack of <A HREF="../../../../../../com/badlogic/gdx/math/Rectangle.html" title="class in com.badlogic.gdx.math"><CODE>Rectangle</CODE></A> objects to be used for clipping via <A HREF="../../../../../../com/badlogic/gdx/graphics/GLCommon.html#glScissor(int, int, int, int)"><CODE>GLCommon.glScissor(int, int, int, int)</CODE></A>. When a new
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 Rectangle is pushed onto the stack, it will be merged with the current top of stack. The minimum area of overlap is then set as
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 the real top of the stack.
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<DT><B>Author:</B></DT>
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  <DD>mzechner</DD>
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<TD><CODE><B><A HREF="../../../../../../com/badlogic/gdx/scenes/scene2d/utils/ScissorStack.html#ScissorStack()">ScissorStack</A></B>()</CODE>
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<B>Method Summary</B></FONT></TH>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE>static&nbsp;void</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../../../../com/badlogic/gdx/scenes/scene2d/utils/ScissorStack.html#calculateScissors(com.badlogic.gdx.graphics.Camera, com.badlogic.gdx.math.Matrix4, com.badlogic.gdx.math.Rectangle, com.badlogic.gdx.math.Rectangle)">calculateScissors</A></B>(<A HREF="../../../../../../com/badlogic/gdx/graphics/Camera.html" title="class in com.badlogic.gdx.graphics">Camera</A>&nbsp;camera,
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                  <A HREF="../../../../../../com/badlogic/gdx/math/Matrix4.html" title="class in com.badlogic.gdx.math">Matrix4</A>&nbsp;batchTransform,
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                  <A HREF="../../../../../../com/badlogic/gdx/math/Rectangle.html" title="class in com.badlogic.gdx.math">Rectangle</A>&nbsp;area,
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                  <A HREF="../../../../../../com/badlogic/gdx/math/Rectangle.html" title="class in com.badlogic.gdx.math">Rectangle</A>&nbsp;scissor)</CODE>
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<BR>
166 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Calculates a scissor rectangle in OpenGL ES window coordinates from a <A HREF="../../../../../../com/badlogic/gdx/graphics/Camera.html" title="class in com.badlogic.gdx.graphics"><CODE>Camera</CODE></A>, a transformation <A HREF="../../../../../../com/badlogic/gdx/math/Matrix4.html" title="class in com.badlogic.gdx.math"><CODE>Matrix4</CODE></A> and
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 an axis aligned <A HREF="../../../../../../com/badlogic/gdx/math/Rectangle.html" title="class in com.badlogic.gdx.math"><CODE>Rectangle</CODE></A>.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE>static&nbsp;<A HREF="../../../../../../com/badlogic/gdx/math/Rectangle.html" title="class in com.badlogic.gdx.math">Rectangle</A></CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../../../../com/badlogic/gdx/scenes/scene2d/utils/ScissorStack.html#getViewport()">getViewport</A></B>()</CODE>
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<BR>
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE>static&nbsp;<A HREF="../../../../../../com/badlogic/gdx/math/Rectangle.html" title="class in com.badlogic.gdx.math">Rectangle</A></CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../../../../com/badlogic/gdx/scenes/scene2d/utils/ScissorStack.html#popScissors()">popScissors</A></B>()</CODE>
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<BR>
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pops the current scissor rectangle from the stack and sets the new scissor area to the new top of stack rectangle.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE>static&nbsp;boolean</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../../../../com/badlogic/gdx/scenes/scene2d/utils/ScissorStack.html#pushScissors(com.badlogic.gdx.math.Rectangle)">pushScissors</A></B>(<A HREF="../../../../../../com/badlogic/gdx/math/Rectangle.html" title="class in com.badlogic.gdx.math">Rectangle</A>&nbsp;scissor)</CODE>
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<BR>
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pushes a new scissor <A HREF="../../../../../../com/badlogic/gdx/math/Rectangle.html" title="class in com.badlogic.gdx.math"><CODE>Rectangle</CODE></A> onto the stack, merging it with the current top of the stack.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE>static&nbsp;void</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../../../../com/badlogic/gdx/scenes/scene2d/utils/ScissorStack.html#toWindowCoordinates(com.badlogic.gdx.graphics.Camera, com.badlogic.gdx.math.Matrix4, com.badlogic.gdx.math.Vector2)">toWindowCoordinates</A></B>(<A HREF="../../../../../../com/badlogic/gdx/graphics/Camera.html" title="class in com.badlogic.gdx.graphics">Camera</A>&nbsp;camera,
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                    <A HREF="../../../../../../com/badlogic/gdx/math/Matrix4.html" title="class in com.badlogic.gdx.math">Matrix4</A>&nbsp;transformMatrix,
198 
                    <A HREF="../../../../../../com/badlogic/gdx/math/Vector2.html" title="class in com.badlogic.gdx.math">Vector2</A>&nbsp;point)</CODE>
199 
 
200 
<BR>
201 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Transforms a point to real window coordinates (as oposed to OpenGL ES window coordinates), where the origin is in the top
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 left and the the y-axis is pointing downwards</TD>
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&nbsp;<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
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<TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH>
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<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
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&nbsp;
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<!-- ========= CONSTRUCTOR DETAIL ======== -->
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<B>Constructor Detail</B></FONT></TH>
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<A NAME="ScissorStack()"><!-- --></A><H3>
228 
ScissorStack</H3>
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<PRE>
230 
public <B>ScissorStack</B>()</PRE>
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<DL>
232 
</DL>
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235 
 
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<B>Method Detail</B></FONT></TH>
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<A NAME="pushScissors(com.badlogic.gdx.math.Rectangle)"><!-- --></A><H3>
245 
pushScissors</H3>
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<PRE>
247 
public static boolean <B>pushScissors</B>(<A HREF="../../../../../../com/badlogic/gdx/math/Rectangle.html" title="class in com.badlogic.gdx.math">Rectangle</A>&nbsp;scissor)</PRE>
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<DL>
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<DD>Pushes a new scissor <A HREF="../../../../../../com/badlogic/gdx/math/Rectangle.html" title="class in com.badlogic.gdx.math"><CODE>Rectangle</CODE></A> onto the stack, merging it with the current top of the stack. The minimal area of
250 
 overlap between the top of stack rectangle and the provided rectangle is pushed onto the stack. This will invoke
251 
 <A HREF="../../../../../../com/badlogic/gdx/graphics/GLCommon.html#glScissor(int, int, int, int)"><CODE>GLCommon.glScissor(int, int, int, int)</CODE></A> with the final top of stack rectangle. In case no scissor is yet on the stack
252 
 this will also enable <A HREF="../../../../../../com/badlogic/gdx/graphics/GL10.html#GL_SCISSOR_TEST"><CODE>GL10.GL_SCISSOR_TEST</CODE></A> automatically.
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<P>
254 
<DD><DL>
255 
 
256 
<DT><B>Returns:</B><DD>true if the scissors were pushed. false if the scissor area was zero, in this case the scissors were not pushed and
257 
         no drawing should occur.</DL>
258 
</DD>
259 
</DL>
260 
<HR>
261 
 
262 
<A NAME="popScissors()"><!-- --></A><H3>
263 
popScissors</H3>
264 
<PRE>
265 
public static <A HREF="../../../../../../com/badlogic/gdx/math/Rectangle.html" title="class in com.badlogic.gdx.math">Rectangle</A> <B>popScissors</B>()</PRE>
266 
<DL>
267 
<DD>Pops the current scissor rectangle from the stack and sets the new scissor area to the new top of stack rectangle. In case
268 
 no more rectangles are on the stack, <A HREF="../../../../../../com/badlogic/gdx/graphics/GL10.html#GL_SCISSOR_TEST"><CODE>GL10.GL_SCISSOR_TEST</CODE></A> is disabled.
269 
<P>
270 
<DD><DL>
271 
</DL>
272 
</DD>
273 
</DL>
274 
<HR>
275 
 
276 
<A NAME="calculateScissors(com.badlogic.gdx.graphics.Camera, com.badlogic.gdx.math.Matrix4, com.badlogic.gdx.math.Rectangle, com.badlogic.gdx.math.Rectangle)"><!-- --></A><H3>
277 
calculateScissors</H3>
278 
<PRE>
279 
public static void <B>calculateScissors</B>(<A HREF="../../../../../../com/badlogic/gdx/graphics/Camera.html" title="class in com.badlogic.gdx.graphics">Camera</A>&nbsp;camera,
280 
                                     <A HREF="../../../../../../com/badlogic/gdx/math/Matrix4.html" title="class in com.badlogic.gdx.math">Matrix4</A>&nbsp;batchTransform,
281 
                                     <A HREF="../../../../../../com/badlogic/gdx/math/Rectangle.html" title="class in com.badlogic.gdx.math">Rectangle</A>&nbsp;area,
282 
                                     <A HREF="../../../../../../com/badlogic/gdx/math/Rectangle.html" title="class in com.badlogic.gdx.math">Rectangle</A>&nbsp;scissor)</PRE>
283 
<DL>
284 
<DD>Calculates a scissor rectangle in OpenGL ES window coordinates from a <A HREF="../../../../../../com/badlogic/gdx/graphics/Camera.html" title="class in com.badlogic.gdx.graphics"><CODE>Camera</CODE></A>, a transformation <A HREF="../../../../../../com/badlogic/gdx/math/Matrix4.html" title="class in com.badlogic.gdx.math"><CODE>Matrix4</CODE></A> and
285 
 an axis aligned <A HREF="../../../../../../com/badlogic/gdx/math/Rectangle.html" title="class in com.badlogic.gdx.math"><CODE>Rectangle</CODE></A>. The rectangle will get transformed by the camera and transform matrices and is then
286 
 projected to screen coordinates. Note that only axis aligned rectangles will work with this method. If either the Camera or
287 
 the Matrix4 have rotational components, the output of this method will not be suitable for
288 
 <A HREF="../../../../../../com/badlogic/gdx/graphics/GLCommon.html#glScissor(int, int, int, int)"><CODE>GLCommon.glScissor(int, int, int, int)</CODE></A>.
289 
<P>
290 
<DD><DL>
291 
<DT><B>Parameters:</B><DD><CODE>camera</CODE> - the <A HREF="../../../../../../com/badlogic/gdx/graphics/Camera.html" title="class in com.badlogic.gdx.graphics"><CODE>Camera</CODE></A><DD><CODE>batchTransform</CODE> - the transformation <A HREF="../../../../../../com/badlogic/gdx/math/Matrix4.html" title="class in com.badlogic.gdx.math"><CODE>Matrix4</CODE></A><DD><CODE>area</CODE> - the <A HREF="../../../../../../com/badlogic/gdx/math/Rectangle.html" title="class in com.badlogic.gdx.math"><CODE>Rectangle</CODE></A> to transform to window coordinates<DD><CODE>scissor</CODE> - the Rectangle to store the result in</DL>
292 
</DD>
293 
</DL>
294 
<HR>
295 
 
296 
<A NAME="getViewport()"><!-- --></A><H3>
297 
getViewport</H3>
298 
<PRE>
299 
public static <A HREF="../../../../../../com/badlogic/gdx/math/Rectangle.html" title="class in com.badlogic.gdx.math">Rectangle</A> <B>getViewport</B>()</PRE>
300 
<DL>
301 
<DD><DL>
302 
 
303 
<DT><B>Returns:</B><DD>the current viewport in OpenGL ES window coordinates based on the currently applied scissor</DL>
304 
</DD>
305 
</DL>
306 
<HR>
307 
 
308 
<A NAME="toWindowCoordinates(com.badlogic.gdx.graphics.Camera, com.badlogic.gdx.math.Matrix4, com.badlogic.gdx.math.Vector2)"><!-- --></A><H3>
309 
toWindowCoordinates</H3>
310 
<PRE>
311 
public static void <B>toWindowCoordinates</B>(<A HREF="../../../../../../com/badlogic/gdx/graphics/Camera.html" title="class in com.badlogic.gdx.graphics">Camera</A>&nbsp;camera,
312 
                                       <A HREF="../../../../../../com/badlogic/gdx/math/Matrix4.html" title="class in com.badlogic.gdx.math">Matrix4</A>&nbsp;transformMatrix,
313 
                                       <A HREF="../../../../../../com/badlogic/gdx/math/Vector2.html" title="class in com.badlogic.gdx.math">Vector2</A>&nbsp;point)</PRE>
314 
<DL>
315 
<DD>Transforms a point to real window coordinates (as oposed to OpenGL ES window coordinates), where the origin is in the top
316 
 left and the the y-axis is pointing downwards
317 
<P>
318 
<DD><DL>
319 
<DT><B>Parameters:</B><DD><CODE>camera</CODE> - the <A HREF="../../../../../../com/badlogic/gdx/graphics/Camera.html" title="class in com.badlogic.gdx.graphics"><CODE>Camera</CODE></A><DD><CODE>transformMatrix</CODE> - the transformation <A HREF="../../../../../../com/badlogic/gdx/math/Matrix4.html" title="class in com.badlogic.gdx.math"><CODE>Matrix4</CODE></A><DD><CODE>point</CODE> - the point to be transformed.</DL>
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