vbo

I´m trying to make a dynamic point cloud visualizer. The points are updated every frame with Kinect Sensor. To grab the frames I´m using OpenCV and GLUT to display. The OpenCV API returns a 640 x 480 (float *), for the points xyz position , and a 640 x 480 (int *) for the rgb color data. To get the maximum performance, I´m trying to use Vertex Buffer Object in stream mode instead of a simple Vertex Array. I´m being able to render it with Vertex Array, but nothing is being rendered with my VBO implementation. I tryied a bunch of different orders in the declarations, but i can't find what I'm

I am rendering array of points with a custom vertex shader. Shaders looks like: void mainVP() in varying int in_vertex_id : VERTEXID { foo(in_vertex_id); } So the only thing I need - is vertex id. But I need a lot of vertices and I don't want to store fake VBO for them (it takes around 16mb of memory). I tried to run my code without binding any VBO. It works. So my rendering looks like: size_t num_vertices = ... glDrawArrays(GL_POINTS, 0, num_vertices); But can I be sure that rendering without binding VBO is safe? But can I be sure that rendering without binding VBO is safe? You can't. The

In my ongoing attempt to convert to OpenGL ES 2.0 from ES 1.x I'm currently converting some code to use Vertex Buffer Objects ('VBOs') rather than the existing unbuffered glDrawArrays calls. I've set up the VBOs and got them working, but have hit a design dilemma and would be grateful the advice of someone more experienced with OpenGL ES 2.0. I want to draw a bunch of polygonal sprites which move often. This is because they're dynamic Box2D bodies, if you're familiar with Box2D. These polygon bodies are each generated by use of GL_TRIANGLE_FAN, which is somewhat critical since GL_POLYGON is

Is there a max size for vertex buffer objects binded to GL_ARRAY_BUFFER or GL_ELEMENT_ARRAY_BUFFER??? Originally, I was drawing a mesh composed of 16 submeshes. For each submesh, I created a vertex buffer and during the rendering phase, I called glDrawElements. This worked fine on the iOS simulator, but when I tried to render to my device, the screen flashes constantly and the meshes aren't displayed. I then did some reading and found that you shouldn't call glDrawElements too many times during a render phase. I tried to combine all of my submeshes into one vertex buffer. The buffer bound to

I came from this question: opengl vbo advice I use OpenGL 3.3 and will not to use deprecated features. Im using Assimp to import my blender models. But im a bit confused as to how much i should split them up in terms of VAO's and VBO's. First off a little side question. I use glDrawElements, do that mean i cannot interleave my vertex attributes or can the VAO figure out using the glVertexAttribPointer and the glDrawElements offset to see where my vertex position is? Main question i guess, boils down to how do i structure my VAO/VBO's for a model with multiple moving parts, and multiple meshes

this question is similar to something I asked here Android OpenGL ES 2: Introduction to VBOs however I tried multiple aproaches since then and I still haven't succeeded, so I think posting another question where I offer aditional details would be a better aproach. I am new to OpenGL ES 2 on Android (I have never worked with another OpenGL, I just need to draw something for an app I am developing for Android) and I would very much like to understand how to use VBOs. I tried to modify this OpenGL ES 2 for Android tutorial to use VBOs when drawing the triangle. I tried to use this step by step