0

我熟悉 IBO、VBO 和 VAO，同时在一个缓冲区中传递顶点、uv 和法线。尽管有些情况下，将它们组合在一个缓冲区中有点困难。

因此我想出了这段代码：

glGenBuffers(2, &iboID[0]);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, iboID[0]);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, vertInd.size() * sizeof(unsigned int), &vertInd[0], GL_STATIC_DRAW);

glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, iboID[1]);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, uvInd.size() * sizeof(unsigned int), &uvInd[0], GL_STATIC_DRAW);

glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);

glGenBuffers(2, &vboID[0]);
glBindBuffer(GL_ARRAY_BUFFER, vboID[0]);
glBufferData(GL_ARRAY_BUFFER, tempV.size() * sizeof(glm::vec3), &tempV[0], GL_STATIC_DRAW);

glBindBuffer(GL_ARRAY_BUFFER, vboID[1]);
glBufferData(GL_ARRAY_BUFFER, tempUV.size() * sizeof(glm::vec2), &tempUV[0], GL_STATIC_DRAW);

glBindBuffer(GL_ARRAY_BUFFER, 0);

glGenVertexArrays(1, &vaoID[0]);
glBindVertexArray(vaoID[0]);    

glBindBuffer(GL_ARRAY_BUFFER, vboID[0]);
glVertexAttribPointer(_shader->attrib("vert"), 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(_shader->attrib("vert"));
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, iboID[0]);
outputError();
glBindBuffer(GL_ARRAY_BUFFER, vboID[1]);
glVertexAttribPointer(_shader->attrib("vertTexCoord"), 2, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(_shader->attrib("vertTexCoord"));
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, iboID[1]);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glBindVertexArray(0);

所以我的问题是：这是正确的做法吗？（因为此刻我没有看到任何东西被吸引到屏幕上）

4

1 回答 1

1

You are trying to specify different element arrays (in separate IBOs), each for a vertex attribute. This is not going to work. Defining separate VBOs for each attribute is fine, but the GL can only have one element array, indexing all the currently enabled attribute arrays at the same time.

于 2013-05-03T21:38:10.080 回答