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Created VAO

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Lauchmelder 2021-12-20 16:58:47 +01:00
parent eeac82d8a1
commit 8f1ea5c7ff
7 changed files with 126 additions and 3 deletions
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53
src/VertexArrayObject.cpp Normal file
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#include "VertexArrayObject.hpp"
#include <assert.h>
#include <glad/glad.h>
AbstractVertexArrayObject::~AbstractVertexArrayObject()
{
glDeleteBuffers(1, &ebo);
glDeleteBuffers(1, &vbo);
glDeleteVertexArrays(1, &vao);
}
AbstractVertexArrayObject::AbstractVertexArrayObject(const VertexArray& vertices, const IndexArray& indices, const Layout& layout, Usage usage) :
vao(0), vbo(0), ebo(0)
{
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
// Determing native OpenGL GLenum depending on specified usage
GLenum bufferUsage;
switch (usage)
{
case Usage::Static: bufferUsage = GL_STATIC_DRAW; break;
case Usage::Dynamic: bufferUsage = GL_DYNAMIC_DRAW; break;
case Usage::Stream: bufferUsage = GL_STREAM_DRAW; break;
default: // Forgot to add a usage case to this switch
assert("Unknown buffer usage" == "");
break;
}
// Create VBO
glGenBuffers(1, &vbo);
glBindBuffer(GL_ARRAY_BUFFER, vbo);
glBufferData(GL_ARRAY_BUFFER, vertices.size() * sizeof(float), (const void*)(vertices.data()), bufferUsage);
// Create EBO
glGenBuffers(1, &ebo);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ebo);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, indices.size() * sizeof(unsigned int), (const void*)(indices.data()), bufferUsage);
// Set up pipeline layout
unsigned int index = 0;
for (const VertexAttribute& attribute : layout)
{
glVertexAttribPointer(index, attribute.size, attribute.type, attribute.normalized, attribute.stride, attribute.pointer);
glEnableVertexAttribArray(index);
index++;
}
}