如何将两个不同的顶点缓冲区绑定到两个槽

how to bind two different vertex buffer to two slots

本文关键字：两个 缓冲区 绑定 顶点      更新时间：2023-10-16

如何将两个顶点缓冲区绑定到不同的槽(slot0和slot1)，

我想要这样的东西在OpenGL(QT):

QGLBuffer VB0, VB1;
VB0.bind(0);
VB1.bind(1);

我到目前为止有这个:

verticesBuffer = new QGLBuffer(QGLBuffer::VertexBuffer);
verticesBuffer->create();
verticesBuffer->bind();
verticesBuffer->setUsagePattern(QGLBuffer::DynamicDraw);
verticesBuffer->allocate(vertices.constData(), _ANGLE_CNT * _RANGE_CNT * 6 * sizeof(QVector3D));
verticesBuffer->release();
colorsBuffer = new QGLBuffer(QGLBuffer::VertexBuffer);
colorsBuffer->create();
colorsBuffer->bind();
colorsBuffer->setUsagePattern(QGLBuffer::DynamicDraw);
colorsBuffer->allocate(_ANGLE_CNT * _RANGE_CNT * 6 * sizeof(float));
colorsBuffer->release();

你能写一个例子来解释我应该做些什么来绑定这两个缓冲区到插槽吗?

当人们不完全理解我的问题时，他们不会随意给它投反对票。我在另一个论坛上问了同样的问题，我得到了确切的答案。我的账户被这种愚蠢的投票方式封锁了。所以，我在这里回答我自己的问题:

glGenVertexArrays(1, &VAO_ID);
glBindVertexArray(VAO_ID);
glBindBuffer(GL_ARRAY_BUFFER,buffer_0_id);
 glVertexAttribPointer(POSITION_0, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), 0);
...

glBindBuffer(GL_ARRAY_BUFFER,buffer_1_id);
 glVertexAttribPointer(POSITION_1, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), 0);
...
layout(location = POSITION_0) in  vec3  Position0;
layout(location = POSITION_1) in  vec3  Position1;

更新:将此添加到初始化部分:

verticesSize = sizeof(vertices);
colorsSize   = sizeof(colors);
glGenBuffers(2, vbods);                       
glBindBuffer(GL_ARRAY_BUFFER, vbods[VERTEX]); 
glBufferData(GL_ARRAY_BUFFER,
             sizeof(vertices)+sizeof(colors),
             vertices, GL_STATIC_DRAW );
glBufferSubData(GL_ARRAY_BUFFER, sizeof(vertices), sizeof(colors), colors);
glEnableClientState(GL_VERTEX_ARRAY); 
glEnableClientState(GL_COLOR_ARRAY);

和这个到渲染部分:

glBindBuffer(GL_ARRAY_BUFFER, vbods[VERTEX]);
glVertexPointer(2, QVector3D, 0, 0);   
glColorPointer(3, GL_FLOAT, 0, (GLvoid *) (ANGLE_COUNT * RANGE_COUNT * 6));
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