add mesh routines

2 files changed, 67 insertions, 0 deletions

diff --git a/src/graphics/Mesh.cpp b/src/graphics/Mesh.cpp
new file mode 100644
index 0000000..64c4c7e
--- /dev/null
+++ b/src/graphics/Mesh.cpp
@@ -0,0 +1,48 @@
+#include <GL/glew.h>
+
+#include "Mesh.hpp"
+
+Mesh::Mesh(Vertex *vertices, size_t num_vert, GLuint *indices, size_t num_indices)
+	: number_indices(num_indices)
+{
+	glGenVertexArrays(1, &VAO);
+	glGenBuffers(1, &VBO);
+	glGenBuffers(1, &EBO);
+
+	glBindVertexArray(VAO);
+
+		glBindBuffer(GL_ARRAY_BUFFER, VBO);
+		glBufferData(GL_ARRAY_BUFFER, num_vert * sizeof(Vertex),
+			&vertices[0], GL_STATIC_DRAW);
+
+		glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
+		glBufferData(GL_ELEMENT_ARRAY_BUFFER, num_indices * sizeof(GLuint),
+			&indices[0], GL_STATIC_DRAW);
+
+		// attributes with coords
+		glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex),
+			(GLvoid *)0);
+		glEnableVertexAttribArray(0);
+
+		// attributes with texture
+		glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex),
+			(GLvoid *)offsetof(Vertex, tex_coords));
+		glEnableVertexAttribArray(1);
+
+		glBindBuffer(GL_ARRAY_BUFFER, 0);
+
+	glBindVertexArray(0);
+}
+
+Mesh::~Mesh()
+{
+	glDeleteBuffers(1, &VBO);
+	glDeleteVertexArrays(1, &VAO);
+}
+
+void Mesh::Draw()
+{
+	glBindVertexArray(VAO);
+		glDrawElements(GL_TRIANGLES, number_indices, GL_UNSIGNED_INT, 0);
+	glBindVertexArray(0);
+}
diff --git a/src/graphics/Mesh.hpp b/src/graphics/Mesh.hpp
new file mode 100644
index 0000000..577a32a
--- /dev/null
+++ b/src/graphics/Mesh.hpp
@@ -0,0 +1,19 @@
+#ifndef ENGINE_MESH_H
+#define ENGINE_MESH_H
+
+#include <GL/glew.h>
+#include "../graphics/Vertex.hpp"
+
+class Mesh {
+	GLuint VAO, VBO, EBO;
+	size_t number_indices;
+
+public:
+	Mesh(Vertex *vertices, size_t num_vert,
+		GLuint *indices, size_t num_indices);
+	~Mesh();
+
+	void Draw();
+};
+
+#endif /* ENGINE_VERTEX_H */