**//My 3D vertex data class**
class Vertex
{
public:
Vertex(float xx, float yy, float zz) : x(xx), y(yy), z(zz) { }
virtual ~Vertex() {}
private:
float x;
float y;
float z;
};
**//My quad data.**
std::vector<Vertex> quadVertexData;
quadVertexData.push_back(Vertex(-0.5, 0.5, 0.0));
quadVertexData.push_back(Vertex(-0.5, -0.5, 0.0));
quadVertexData.push_back(Vertex(0.5, -0.5, 0.0));
quadVertexData.push_back(Vertex(0.5, 0.5, 0.0));
//这是我如何进行我的渲染调用。opengl C++代码不会给出预期的结果
glGenVertexArrays(1, &_vao);
glBindVertexArray(_vao);
glGenBuffers(1, &_vbo);
glGenBuffers(1, &_ebo);
void render(std::vector<Vertex>& vertices, std::vector<unsigned int> indices)
{
glBindBuffer(GL_ARRAY_BUFFER, _vbo);
glBufferData(GL_ARRAY_BUFFER, sizeof(Vertex) * vertices.size(),
&vertices[0], GL_STATIC_DRAW); //tried with sizeof(vertices[0]) too.
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, _ebo);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(unsigned int) * indices.size(),
&indices[0], GL_STATIC_DRAW);
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, 0);
glDrawElements(GL_TRIANGLES, indices.size(), GL_UNSIGNED_INT, 0);
glDisableVertexAttribArray(0);
}
ISSUE://而是四的,我得到一个意想不到的三角形秀照片。 我应该如何通过bufferdata
才能获得理想的效果?
相同的代码,如果我尝试与glm::vec3
那么它的工作正常。
//快照:
感谢您的答复。我也试过硬编码12,结果仍然一样。 –