Contents
How to draw multiple models in OpenGL stack overflow?
Fill buffer with vertex data. Repeat 2 and 3 for buffer 2 as element array buffer and index data, respectively. Bind buffer 1 as an array buffer. Use glVertexAttribPointer to specify that this buffer goes to a specific attribute.
How to create multiple VBO’s in OpenGL?
In the loading function, it generates a new VBO ID and loads the vertex data from a file into that buffer by binding it etc. (This works fine) At the beginning of the program I make one model object and load a .obj file.
What can you do with a buffer in OpenGL?
When a buffer is active, you can do stuff with it (populate with data for example). Note that there are different bind targets, so you can, for example, have one active array buffer (for vertex data) and one active element array buffer (for index data).
How to find the source of an attribute in OpenGL?
To do this, you first bind your buffer with your vertex data (as an array buffer), then call glVertexAttribPointer with you attribute id. This tells OpenGL that the bound buffer is now the source for the current attribute.
Can you use multiple Vbos at the same time?
You cannot use multiple VBOs at once for the same attribute – the call to bind another buffer just overwrites the previous call and makes the second buffer active, which, I assume, is why only your second object gets drawn.
How to create a VBO object in OpenGL?
Once glBindBuffer() is first called, VBO initializes the buffer with a zero-sized memory buffer and set the initial VBO states, such as usage and access properties. glBufferData() You can copy the data into the buffer object with glBufferData() when the buffer has been initialized.
How to create a vertex buffer in OpenGL?
It requires 2 parameters: the first one is the number of buffer objects to create, and the second parameter is the address of a GLuint variable or array to store a single ID or multiple IDs. void glGenBuffers(GLsizei n, GLuint* ids) glBindBuffer()