vbo

问题 1) Do I understand correctly that to draw using vertex arrays or VBOs I need for all my attributes to either call glBindAttribLocation before the shader program linkage or call glGetAttribLocation after the shader program was successfully linked and then use the bound/obtained index in the glVertexAttribPointer and glEnableVertexAttribArray calls? To be more specific: these three functions - glGetAttribLocation, glVertexAttribPointer and glEnableVertexAttribArray - they all have an input

问题 I am having trouble getting my level data to appear on the screen. I have my shader in use rendering a cube correctly but not the level. Here is the setup for my VBO, VAO and IBO: void ZoneMesh::buildData() { // Create the VBO for this mesh glGenBuffers(1, &vbo); glBindBuffer(GL_ARRAY_BUFFER, vbo); glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW); // Create the IBO glGenBuffers(1, &ibo); glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo); glBufferData(GL_ELEMENT_ARRAY_BUFFER,

问题 I am having trouble getting my level data to appear on the screen. I have my shader in use rendering a cube correctly but not the level. Here is the setup for my VBO, VAO and IBO: void ZoneMesh::buildData() { // Create the VBO for this mesh glGenBuffers(1, &vbo); glBindBuffer(GL_ARRAY_BUFFER, vbo); glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW); // Create the IBO glGenBuffers(1, &ibo); glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo); glBufferData(GL_ELEMENT_ARRAY_BUFFER,

问题 So I'm swapping from one program to another, and I can't figure out why but GL_QUADS will no longer display with the same code. To try and figure out why old code was not working, I made this new, simple code and it STILL does not work. The setup: vector <vec3f> squarepoints; vec3f temper(-0.5f, 0.5f, 0.5f); squarepoints.push_back(temper); temper.x += 1.0f; squarepoints.push_back(temper); temper.y -= 1.0f; squarepoints.push_back(temper); temper.x -= 1.0f; squarepoints.push_back(temper);

来源： https://stackoverflow.com/questions/63411913/how-can-i-render-a-quad-using-lwjgl3

来源： https://stackoverflow.com/questions/63545503/problem-with-rendering-a-quad-in-lwjgl-3-using-vaos-and-vbos

问题 I'm trying to draw two triangles in a window in OpenGL 3.3. I'm using the GLFW library for the windowing system. From what I understand, I should have two VBOs (one for each triangle) and one VAO containing these two VBOs. That's what I did. However, I can't figure out what calls I should make to render these two VBOs. Indeed, whatever I do, only the first VBO (first triangle) gets drawn . The second one never shows up. int main() { GLFWwindow *window = setupWindow(); GLfloat

问题 I'm trying to draw two triangles in a window in OpenGL 3.3. I'm using the GLFW library for the windowing system. From what I understand, I should have two VBOs (one for each triangle) and one VAO containing these two VBOs. That's what I did. However, I can't figure out what calls I should make to render these two VBOs. Indeed, whatever I do, only the first VBO (first triangle) gets drawn . The second one never shows up. int main() { GLFWwindow *window = setupWindow(); GLfloat

问题 So I'm swapping from one program to another, and I can't figure out why but GL_QUADS will no longer display with the same code. To try and figure out why old code was not working, I made this new, simple code and it STILL does not work. The setup: vector <vec3f> squarepoints; vec3f temper(-0.5f, 0.5f, 0.5f); squarepoints.push_back(temper); temper.x += 1.0f; squarepoints.push_back(temper); temper.y -= 1.0f; squarepoints.push_back(temper); temper.x -= 1.0f; squarepoints.push_back(temper);

问题 I am using Firefox to render a 3D object in a canvas using WebGL. My code was working previously, whereby a textured object was being displayed within the canvas. However upon revisiting my code, without making any changes, the object will not render and the browser console displays the following error: Error: WebGL: drawArrays: no VBO bound to enabled vertex attrib index 1! It is complaining about a line in my drawScene() function, shown below: function drawScene() { gl.viewport(0, 0, gl