54 lines
1.5 KiB
C++
54 lines
1.5 KiB
C++
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#include "VertexArrayObject.hpp"
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#include <assert.h>
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#include <glad/glad.h>
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AbstractVertexArrayObject::~AbstractVertexArrayObject()
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{
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glDeleteBuffers(1, &ebo);
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glDeleteBuffers(1, &vbo);
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glDeleteVertexArrays(1, &vao);
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}
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AbstractVertexArrayObject::AbstractVertexArrayObject(const VertexArray& vertices, const IndexArray& indices, const Layout& layout, Usage usage) :
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vao(0), vbo(0), ebo(0)
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{
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glGenVertexArrays(1, &vao);
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glBindVertexArray(vao);
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// Determing native OpenGL GLenum depending on specified usage
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GLenum bufferUsage;
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switch (usage)
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{
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case Usage::Static: bufferUsage = GL_STATIC_DRAW; break;
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case Usage::Dynamic: bufferUsage = GL_DYNAMIC_DRAW; break;
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case Usage::Stream: bufferUsage = GL_STREAM_DRAW; break;
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default: // Forgot to add a usage case to this switch
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assert("Unknown buffer usage" == "");
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break;
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}
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// Create VBO
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glGenBuffers(1, &vbo);
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glBindBuffer(GL_ARRAY_BUFFER, vbo);
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glBufferData(GL_ARRAY_BUFFER, vertices.size() * sizeof(float), (const void*)(vertices.data()), bufferUsage);
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// Create EBO
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glGenBuffers(1, &ebo);
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ebo);
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glBufferData(GL_ELEMENT_ARRAY_BUFFER, indices.size() * sizeof(unsigned int), (const void*)(indices.data()), bufferUsage);
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// Set up pipeline layout
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unsigned int index = 0;
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for (const VertexAttribute& attribute : layout)
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{
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glVertexAttribPointer(index, attribute.size, attribute.type, attribute.normalized, attribute.stride, attribute.pointer);
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glEnableVertexAttribArray(index);
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index++;
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}
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}
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