Create mesh direct from vertices and indices

2 files changed, 23 insertions, 16 deletions

diff --git a/gfx/models/mesh.cpp b/gfx/models/mesh.cpp
index 967f3fd..90de8db 100644
--- a/gfx/models/mesh.cpp
+++ b/gfx/models/mesh.cpp
@@ -1,7 +1,6 @@
 #include "mesh.h"

 #include "obj_loader.h"

 #include "vertex.hpp"

-#include <glm/glm.hpp>

 #include <memory>

 #include <vector>

 

@@ -39,23 +38,30 @@ Mesh::Mesh(const IndexedModel & model) :
 	glBindVertexArray(0);

 }

 

-Mesh::Mesh(Vertex * vertices, unsigned int numVertices, unsigned int * indices, unsigned int numIndices) :

-	Mesh {[vertices, numVertices, indices, numIndices]() {

-		IndexedModel model;

+Mesh::Mesh(std::span<Vertex> vertices, std::span<unsigned int> indices) :

+	m_vertexArrayObject {}, m_vertexArrayBuffers {}, m_numIndices {indices.size()}

+{

+	glGenVertexArrays(1, &m_vertexArrayObject);

+	glBindVertexArray(m_vertexArrayObject);

 

-		for (unsigned int i = 0; i < numVertices; i++) {

-			model.positions.push_back(vertices[i].pos);

-			model.texCoords.push_back(vertices[i].texCoord);

-			model.normals.push_back(vertices[i].normal);

-		}

+	glGenBuffers(2, m_vertexArrayBuffers.data());

 

-		for (unsigned int i = 0; i < numIndices; i++) {

-			model.indices.push_back(indices[i]);

-		}

+	glBindBuffer(GL_ARRAY_BUFFER, m_vertexArrayBuffers[0]);

+	glBufferData(GL_ARRAY_BUFFER, sizeof(Vertex) * vertices.size(), vertices.data(), GL_STATIC_DRAW);

 

-		return model;

-	}()}

-{

+	glEnableVertexAttribArray(0);

+	glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void *)offsetof(Vertex, pos));

+

+	glEnableVertexAttribArray(1);

+	glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void *)offsetof(Vertex, texCoord));

+

+	glEnableVertexAttribArray(2);

+	glVertexAttribPointer(2, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void *)offsetof(Vertex, normal));

+

+	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_vertexArrayBuffers[1]);

+	glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices[0]) * indices.size(), indices.data(), GL_STATIC_DRAW);

+

+	glBindVertexArray(0);

 }

 

 Mesh::~Mesh()

diff --git a/gfx/models/mesh.h b/gfx/models/mesh.h
index 6dc5c32..e955644 100644
--- a/gfx/models/mesh.h
+++ b/gfx/models/mesh.h
@@ -4,6 +4,7 @@
 #include <GL/glew.h>

 #include <array>

 #include <cstddef>

+#include <span>

 #include <special_members.hpp>

 #include <string>

 

@@ -16,7 +17,7 @@ class Mesh {
 public:

 	explicit Mesh(const std::string & fileName);

 	explicit Mesh(const IndexedModel & model);

-	Mesh(Vertex * vertices, unsigned int numVertices, unsigned int * indices, unsigned int numIndices);

+	Mesh(std::span<Vertex> vertices, std::span<unsigned int> indices);

 	virtual ~Mesh();

 

 	NO_COPY(Mesh);