/**
* Creates a new IndexArray to be used with vertex arrays.
*
* @param maxIndices the maximum number of indices this buffer can hold
*/
public IndexArray(int maxIndices) {
byteBuffer = BufferUtils.newUnsafeByteBuffer(maxIndices * 2);
buffer = byteBuffer.asShortBuffer();
buffer.flip();
byteBuffer.flip();
}
/** Disposes this IndexArray and all its associated OpenGL resources. */
public void dispose() {
BufferUtils.disposeUnsafeByteBuffer(byteBuffer);
}
// [------------------------------ MAIN CLASS ----------------------------------]
public class IndexArray implements IndexData {
static final IntBuffer tmpHandle = BufferUtils.newIntBuffer(1);
ShortBuffer buffer;
ByteBuffer byteBuffer;
/**
* Creates a new IndexArray to be used with vertex arrays.
*
* @param maxIndices the maximum number of indices this buffer can hold
*/
public IndexArray(int maxIndices) {
byteBuffer = BufferUtils.newUnsafeByteBuffer(maxIndices * 2);
buffer = byteBuffer.asShortBuffer();
buffer.flip();
byteBuffer.flip();
}
/** @return the number of indices currently stored in this buffer */
public int getNumIndices() {
return buffer.limit();
}
/** @return the maximum number of indices this IndexArray can store. */
public int getNumMaxIndices() {
return buffer.capacity();
}
/**
* Sets the indices of this IndexArray, discarding the old indices. The count must equal the
* number of indices to be copied to this IndexArray.
*
* <p>
*
* <p>This can be called in between calls to {@link #bind()} and {@link #unbind()}. The index data
* will be updated instantly.
*
* @param indices the vertex data
* @param offset the offset to start copying the data from
* @param count the number of shorts to copy
*/
public void setIndices(short[] indices, int offset, int count) {
buffer.clear();
buffer.put(indices, offset, count);
buffer.flip();
byteBuffer.position(0);
byteBuffer.limit(count << 1);
}
/**
* Returns the underlying ShortBuffer. If you modify the buffer contents they wil be uploaded on
* the call to {@link #bind()}. If you need immediate uploading use {@link #setIndices(short[],
* int, int)}.
*
* @return the underlying short buffer.
*/
public ShortBuffer getBuffer() {
return buffer;
}
/** Binds this IndexArray for rendering with glDrawElements. */
public void bind() {}
/** Unbinds this IndexArray. */
public void unbind() {}
/**
* Invalidates the IndexArray so a new OpenGL buffer handle is created. Use this in case of a
* context loss.
*/
public void invalidate() {}
/** Disposes this IndexArray and all its associated OpenGL resources. */
public void dispose() {
BufferUtils.disposeUnsafeByteBuffer(byteBuffer);
}
}
