Step 8 initTriangle()

Define function initTriangle()

In main.cpp, define a function initTriangle(), define the triangle:

void initTriangle()
{

}

Add trangle data

Inside the function, adding

GLfloat verts[] = {
    -1.0f, -1.0f,
    1.0f, -1.0f,
    0.0f, 1.0f,
};

Create the vertex buffer

inside initTriangle(), adding code to create the buffer for holding the triangle vertex

    GLuint bufID;
    glGenBuffers(1, &bufID);
    glBindBuffer(GL_ARRAY_BUFFER, bufID);

Set vertex attributes

Set the buffer data to triangle vertex

Specify that each vetex has two coordinate components

    glBufferData(GL_ARRAY_BUFFER, sizeof(verts), verts, GL_STATIC_DRAW);
    glEnableVertexAttribArray(0);
    glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, 0);