Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
/**
 * Copyright 2008 - 2011
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 * 
 * @project loonframework
 * @author chenpeng
 * @emailceponline@yahoo.com.cn
 * @version 0.1
 */

import java.nio.ByteBuffer;
import java.nio.ByteOrder;

import java.nio.FloatBuffer;

public class Main {
    public static final int SIZEOF_FLOAT = 4;

    public static FloatBuffer ensureLargeEnough(FloatBuffer buf, final int required) {
        if (buf == null || (buf.remaining() < required)) {
            final int position = (buf != null ? buf.position() : 0);
            final FloatBuffer newVerts = createFloatBuffer(position + required);
            if (buf != null) {
                buf.rewind();
                newVerts.put(buf);
                newVerts.position(position);
            }
            buf = newVerts;
        }
        return buf;
    }

    public static FloatBuffer createFloatBuffer(FloatBuffer buf) {
        FloatBuffer dest = createFloatBuffer(buf.capacity());
        dest.clear();
        dest.put(buf);
        dest.position(0);
        return dest;
    }

    public static FloatBuffer createFloatBuffer(FloatBuffer buf, int start, int end) {
        final float[] inds = new float[buf.limit()];
        for (int x = start - 1; x < end - 1; x++) {
            inds[x] = buf.get();
        }
        return createFloatBuffer(inds);
    }

    public static FloatBuffer createFloatBuffer(final int size) {
        final FloatBuffer buf = ByteBuffer.allocateDirect(SIZEOF_FLOAT * size).order(ByteOrder.nativeOrder())
                .asFloatBuffer();
        buf.clear();
        return buf;
    }

    public static FloatBuffer createFloatBuffer(float... floats) {
        FloatBuffer fb = createFloatBuffer(floats.length);
        fb.put(floats);
        fb.position(0);
        return fb;
    }

    public static FloatBuffer createFloatBuffer(final FloatBuffer reuseStore, final float... data) {
        if (data == null) {
            return null;
        }
        final FloatBuffer buff;
        if (reuseStore == null || reuseStore.capacity() != data.length) {
            buff = createFloatBuffer(data.length);
        } else {
            buff = reuseStore;
            buff.clear();
        }
        buff.clear();
        buff.put(data);
        buff.flip();
        return buff;
    }
}