SkyRenderer.java 文件源码

private void generateSky()
{
    Tessellator tessellator = Tessellator.getInstance();
    BufferBuilder bufferBuilder = tessellator.getBuffer();

    if (this.skyVBO != null)
    {
        this.skyVBO.deleteGlBuffers();
    }

    if (this.glSkyList >= 0)
    {
        GLAllocation.deleteDisplayLists(this.glSkyList);
        this.glSkyList = -1;
    }

    if (this.vboEnabled)
    {
        this.skyVBO = new net.minecraft.client.renderer.vertex.VertexBuffer(this.vertexBufferFormat);
        this.renderSky(bufferBuilder, 16.0F, false);
        bufferBuilder.finishDrawing();
        bufferBuilder.reset();
        this.skyVBO.bufferData(bufferBuilder.getByteBuffer());
    }
    else
    {
        this.glSkyList = GLAllocation.generateDisplayLists(1);
        GlStateManager.glNewList(this.glSkyList, 4864);
        this.renderSky(bufferBuilder, 16.0F, false);
        tessellator.draw();
        GlStateManager.glEndList();
    }
}