WorldVertexBufferUploader.java 文件源码

@SuppressWarnings("incomplete-switch")
public void draw(VertexBuffer vertexBufferIn)
{
    if (vertexBufferIn.getVertexCount() > 0)
    {
        VertexFormat vertexformat = vertexBufferIn.getVertexFormat();
        int i = vertexformat.getNextOffset();
        ByteBuffer bytebuffer = vertexBufferIn.getByteBuffer();
        List<VertexFormatElement> list = vertexformat.getElements();

        for (int j = 0; j < list.size(); ++j)
        {
            VertexFormatElement vertexformatelement = (VertexFormatElement)list.get(j);
            VertexFormatElement.EnumUsage vertexformatelement$enumusage = vertexformatelement.getUsage();
            int k = vertexformatelement.getType().getGlConstant();
            int l = vertexformatelement.getIndex();
            bytebuffer.position(vertexformat.getOffset(j));

            // moved to VertexFormatElement.preDraw
            vertexformatelement.getUsage().preDraw(vertexformat, j, i, bytebuffer);
        }

        GlStateManager.glDrawArrays(vertexBufferIn.getDrawMode(), 0, vertexBufferIn.getVertexCount());
        int i1 = 0;

        for (int j1 = list.size(); i1 < j1; ++i1)
        {
            VertexFormatElement vertexformatelement1 = (VertexFormatElement)list.get(i1);
            VertexFormatElement.EnumUsage vertexformatelement$enumusage1 = vertexformatelement1.getUsage();
            int k1 = vertexformatelement1.getIndex();

            // moved to VertexFormatElement.postDraw
            vertexformatelement1.getUsage().postDraw(vertexformat, i1, i, bytebuffer);
        }
    }

    vertexBufferIn.reset();
}