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#include "mesh.h"
#include "gfx/gl/vertexArrayObject.hpp"
#include "glArrays.h"
#include "vertex.hpp"
#include <cstddef>
Mesh::Mesh(const std::span<const Vertex> vertices, const std::span<const unsigned int> indices, GLenum m) :
m_numIndices {static_cast<GLsizei>(indices.size())}, mode {m}
{
VertexArrayObject::data(vertices, m_vertexArrayBuffers[0], GL_ARRAY_BUFFER);
VertexArrayObject::data(indices, m_vertexArrayBuffers[1], GL_ARRAY_BUFFER);
configureVAO(m_vertexArrayObject);
}
VertexArrayObject &
Mesh::configureVAO(VertexArrayObject && vao) const
{
return vao
.addAttribs<Vertex, &Vertex::pos, &Vertex::texCoord, &Vertex::normal, &Vertex::colour, &Vertex::material>(
m_vertexArrayBuffers[0])
.addIndices(m_vertexArrayBuffers[1]);
}
void
Mesh::Draw() const
{
glBindVertexArray(m_vertexArrayObject);
glDrawElements(mode, m_numIndices, GL_UNSIGNED_INT, nullptr);
glBindVertexArray(0);
}
void
Mesh::DrawInstanced(GLuint vao, GLsizei count) const
{
glBindVertexArray(vao);
glDrawElementsInstanced(mode, m_numIndices, GL_UNSIGNED_INT, nullptr, count);
glBindVertexArray(0);
}
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