glfwMakeContextCurrent(window); //! @note Set the vsync to be enabled by default glfwSwapInterval(interval: 1); float vertices[] = { }; [0]=0.5f, [1]=0.5f, [2]=0.0f, // top right [3]=0.5f, [4]=-0.5f, [5]=0.0f, [6]=-0.5f, [7]=0.5f, [8]=0.0f, // second triangle // bottom right // top left [9]=0.5f, [10]=-0.5f, [11]=0.0f, // bottom right [12]=-0.5f, [13]=-0.5f, [14]=0.0f, // bottom left [15]=-0.5f, [16]=0.5f, [17]=0.0f // top left uint32_t verticesBufferRendererID; glGenBuffers(GL_ARRAY_BUFFER, &verticesBufferRendererID); glBindBuffer(GL_ARRAY_BUFFER, verticesBuffer RendererID); glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW); float indices[] = { }; [0]=0, [1]=1, [2]=3, //! @note First Triangle [3]=1, [4]=2, [5]=3 //! @note Second Triangle uint32_t indicesBufferRendererID; glGenBuffers(GL_ELEMENT_ARRAY_BUFFER, &indicesBufferRendererID); glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indicesBufferRendererID); glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW); glDrawElements (GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), GL_UNSIGNED_INT, 0);
glfwMakeContextCurrent(window); //! @note Set the vsync to be enabled by default glfwSwapInterval(interval: 1); float vertices[] = { }; [0]=0.5f, [1]=0.5f, [2]=0.0f, // top right [3]=0.5f, [4]=-0.5f, [5]=0.0f, [6]=-0.5f, [7]=0.5f, [8]=0.0f, // second triangle // bottom right // top left [9]=0.5f, [10]=-0.5f, [11]=0.0f, // bottom right [12]=-0.5f, [13]=-0.5f, [14]=0.0f, // bottom left [15]=-0.5f, [16]=0.5f, [17]=0.0f // top left uint32_t verticesBufferRendererID; glGenBuffers(GL_ARRAY_BUFFER, &verticesBufferRendererID); glBindBuffer(GL_ARRAY_BUFFER, verticesBuffer RendererID); glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW); float indices[] = { }; [0]=0, [1]=1, [2]=3, //! @note First Triangle [3]=1, [4]=2, [5]=3 //! @note Second Triangle uint32_t indicesBufferRendererID; glGenBuffers(GL_ELEMENT_ARRAY_BUFFER, &indicesBufferRendererID); glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indicesBufferRendererID); glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW); glDrawElements (GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), GL_UNSIGNED_INT, 0);
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
Related questions
Question
In
How does having index buffers work? How do we know what indices we want to reuse, in terms of telling how that works, especially with OpenGL are going to be using those indices?
Can you emphasize both visually and emphasis on how the index buffers refer to our vertices. Like in the image, I attached for more context on what I mean.
What I cant see visually is how do you know what values should be put in the index buffer to render.
![glfwMakeContextCurrent(window);
//! @note Set the vsync to be enabled by default
glfwSwapInterval(interval: 1);
float vertices[] = {
};
[0]=0.5f, [1]=0.5f, [2]=0.0f, // top right
[3]=0.5f, [4]=-0.5f, [5]=0.0f,
[6]=-0.5f, [7]=0.5f, [8]=0.0f,
// second triangle
// bottom right
// top left
[9]=0.5f, [10]=-0.5f, [11]=0.0f, // bottom right
[12]=-0.5f, [13]=-0.5f, [14]=0.0f, // bottom left
[15]=-0.5f, [16]=0.5f, [17]=0.0f // top left
uint32_t verticesBufferRendererID;
glGenBuffers(GL_ARRAY_BUFFER, &verticesBufferRendererID);
glBindBuffer(GL_ARRAY_BUFFER, verticesBuffer RendererID);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
float indices[] = {
};
[0]=0, [1]=1, [2]=3, //! @note First Triangle
[3]=1, [4]=2, [5]=3 //! @note Second Triangle
uint32_t indicesBufferRendererID;
glGenBuffers(GL_ELEMENT_ARRAY_BUFFER, &indicesBufferRendererID);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indicesBufferRendererID);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW);
glDrawElements (GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), GL_UNSIGNED_INT, 0);](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F55f0ae31-0bcc-45bd-bd65-ca5ef078588e%2F880412d1-a16f-41dd-8309-d2e3a058cfde%2Fivnp06_processed.png&w=3840&q=75)
Transcribed Image Text:glfwMakeContextCurrent(window);
//! @note Set the vsync to be enabled by default
glfwSwapInterval(interval: 1);
float vertices[] = {
};
[0]=0.5f, [1]=0.5f, [2]=0.0f, // top right
[3]=0.5f, [4]=-0.5f, [5]=0.0f,
[6]=-0.5f, [7]=0.5f, [8]=0.0f,
// second triangle
// bottom right
// top left
[9]=0.5f, [10]=-0.5f, [11]=0.0f, // bottom right
[12]=-0.5f, [13]=-0.5f, [14]=0.0f, // bottom left
[15]=-0.5f, [16]=0.5f, [17]=0.0f // top left
uint32_t verticesBufferRendererID;
glGenBuffers(GL_ARRAY_BUFFER, &verticesBufferRendererID);
glBindBuffer(GL_ARRAY_BUFFER, verticesBuffer RendererID);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
float indices[] = {
};
[0]=0, [1]=1, [2]=3, //! @note First Triangle
[3]=1, [4]=2, [5]=3 //! @note Second Triangle
uint32_t indicesBufferRendererID;
glGenBuffers(GL_ELEMENT_ARRAY_BUFFER, &indicesBufferRendererID);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indicesBufferRendererID);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW);
glDrawElements (GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), GL_UNSIGNED_INT, 0);
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