Package gaiasky.util.gdx.mesh

Class IntIndexBufferObjectSubData

  • All Implemented Interfaces:
    com.badlogic.gdx.utils.Disposable, IntIndexData
    public class IntIndexBufferObjectSubData
extends java.lang.Object
implements IntIndexData

    This implementation uses 32-bit integer indices instead of 16-bit shorts

    IntIndexBufferObject wraps OpenGL's index buffer functionality to be used in conjunction with VBOs.

    You can also use this to store indices for vertex arrays. Do not call bind() or unbind() in this case but rather use getBuffer() to use the buffer directly with glDrawElements. You must also create the IntIndexBufferObject with the second constructor and specify isDirect as true as glDrawElements in conjunction with vertex arrays needs direct buffers.

    VertexBufferObjects must be disposed via the dispose() method when no longer needed

    • Constructor Summary

      Constructors 
      Constructor Description
      IntIndexBufferObjectSubData​(boolean isStatic, int maxIndices)
      Creates a new IntIndexBufferObject.
      IntIndexBufferObjectSubData​(int maxIndices)
      Creates a new IntIndexBufferObject to be used with vertex arrays.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void bind()
      Binds this IntIndexBufferObject for rendering with glDrawElements.
      void dispose()
      Disposes this IntIndexBufferObject and all its associated OpenGL resources.
      java.nio.IntBuffer getBuffer()
      Returns the underlying IntBuffer.
      int getNumIndices()  
      int getNumMaxIndices()  
      void invalidate()
      Invalidates the IntIndexBufferObject so a new OpenGL buffer handle is created.
      void setIndices​(int[] indices, int offset, int count)
      Sets the indices of this IntIndexBufferObject, discarding the old indices.
      void setIndices​(java.nio.IntBuffer indices)
      Copies the specified indices to the indices of this IntIndexBufferObject, discarding the old indices.
      void unbind()
      Unbinds this IntIndexBufferObject.
      void updateIndices​(int targetOffset, int[] indices, int offset, int count)
      Update (a portion of) the indices.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • IntIndexBufferObjectSubData

        public IntIndexBufferObjectSubData​(boolean isStatic,
                                   int maxIndices)
        Creates a new IntIndexBufferObject.
        Parameters:
        isStatic - whether the index buffer is static
        maxIndices - the maximum number of indices this buffer can hold

      • IntIndexBufferObjectSubData

        public IntIndexBufferObjectSubData​(int maxIndices)
        Creates a new IntIndexBufferObject to be used with vertex arrays.
        Parameters:
        maxIndices - the maximum number of indices this buffer can hold

    • Method Detail

      • getNumIndices

        public int getNumIndices()
        Specified by:
        getNumIndices in interface IntIndexData
        Returns:
        the number of indices currently stored in this buffer

      • getNumMaxIndices

        public int getNumMaxIndices()
        Specified by:
        getNumMaxIndices in interface IntIndexData
        Returns:
        the maximum number of indices this IntIndexBufferObject can store.

      • setIndices

        public void setIndices​(int[] indices,
                       int offset,
                       int count)

        Sets the indices of this IntIndexBufferObject, discarding the old indices. The count must equal the number of indices to be copied to this IntIndexBufferObject.

        This can be called in between calls to bind() and unbind(). The index data will be updated instantly.

        Specified by:
        setIndices in interface IntIndexData
        Parameters:
        indices - the vertex data
        offset - the offset to start copying the data from
        count - the number of floats to copy

      • setIndices

        public void setIndices​(java.nio.IntBuffer indices)
        Description copied from interface: IntIndexData
        Copies the specified indices to the indices of this IntIndexBufferObject, discarding the old indices. Copying start at the current Buffer.position() of the specified buffer and copied the Buffer.remaining() amount of indices. This can be called in between calls to IntIndexData.bind() and IntIndexData.unbind(). The index data will be updated instantly.
        Specified by:
        setIndices in interface IntIndexData
        Parameters:
        indices - the index data to copy

      • updateIndices

        public void updateIndices​(int targetOffset,
                          int[] indices,
                          int offset,
                          int count)
        Description copied from interface: IntIndexData
        Update (a portion of) the indices.
        Specified by:
        updateIndices in interface IntIndexData
        Parameters:
        targetOffset - offset in indices buffer
        indices - the index data
        offset - the offset to start copying the data from
        count - the number of ints to copy

      • getBuffer

        public java.nio.IntBuffer getBuffer()

        Returns the underlying IntBuffer. If you modify the buffer contents they wil be uploaded on the call to bind(). If you need immediate uploading use setIndices(int[], int, int).

        Specified by:
        getBuffer in interface IntIndexData
        Returns:
        the underlying int buffer.

      • bind

        public void bind()
        Binds this IntIndexBufferObject for rendering with glDrawElements.
        Specified by:
        bind in interface IntIndexData

      • unbind

        public void unbind()
        Unbinds this IntIndexBufferObject.
        Specified by:
        unbind in interface IntIndexData

      • invalidate

        public void invalidate()
        Invalidates the IntIndexBufferObject so a new OpenGL buffer handle is created. Use this in case of a context loss.
        Specified by:
        invalidate in interface IntIndexData

      • dispose

        public void dispose()
        Disposes this IntIndexBufferObject and all its associated OpenGL resources.
        Specified by:
        dispose in interface com.badlogic.gdx.utils.Disposable
        Specified by:
        dispose in interface IntIndexData