src/Platform/OpenGL/OpenGLVertexArray.cpp


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55

#include <glad/glad.h>
#include "OpenGLVertexArray.h"
#include "Rendering/VertexBuffer.h"
#include "Rendering/IndexBuffer.h"

namespace Donut
{
    OpenGLVertexArray::OpenGLVertexArray() 
    {
        glCreateVertexArrays(1, &m_RendererID);
    }

    OpenGLVertexArray::~OpenGLVertexArray() 
    {
        glDeleteVertexArrays(1, &m_RendererID);
    }

    void OpenGLVertexArray::Bind() const 
    {
        glBindVertexArray(m_RendererID);
    }

    void OpenGLVertexArray::Unbind() const 
    {
        glBindVertexArray(0);
    }

    void OpenGLVertexArray::AddVertexBuffer(const std::shared_ptr<VertexBuffer>& vertexBuffer) 
    {
        glBindVertexArray(m_RendererID);
        vertexBuffer->Bind();

        const auto& layout = vertexBuffer->GetLayout();
        for (const auto& element : layout.GetElements()) 
        {
            glEnableVertexAttribArray(m_VertexBufferIndex);
            glVertexAttribPointer(m_VertexBufferIndex,
                element.count,
                element.type,
                element.normalized ? GL_TRUE : GL_FALSE,
                layout.GetStride(),
                (const void*)element.offset);
            m_VertexBufferIndex++;
        }

        m_VertexBuffers.push_back(vertexBuffer);
    }

    void OpenGLVertexArray::SetIndexBuffer(const std::shared_ptr<IndexBuffer>& indexBuffer) 
    {
        glBindVertexArray(m_RendererID);
        indexBuffer->Bind();
        m_IndexBuffer = indexBuffer;
    }
};