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src/graphics/Mesh.cpp

@@ -0,0 +1,45 @@
+#include "Mesh.h"
+#include <GL/glew.h>
+
+Mesh::Mesh(const float* buffer, size_t vertices, const int* attrs) : vertices(vertices){
+	vertexSize = 0;
+	for (int i = 0; attrs[i]; i++){
+		vertexSize += attrs[i];
+	}
+
+	glGenVertexArrays(1, &vao);
+	glGenBuffers(1, &vbo);
+
+	glBindVertexArray(vao);
+	glBindBuffer(GL_ARRAY_BUFFER, vbo);
+	glBufferData(GL_ARRAY_BUFFER, sizeof(float) * vertexSize * vertices, buffer, GL_STATIC_DRAW);
+
+	// attributes
+	int offset = 0;
+	for (int i = 0; attrs[i]; i++){
+		int size = attrs[i];
+		glVertexAttribPointer(i, size, GL_FLOAT, GL_FALSE, vertexSize * sizeof(float), (GLvoid*)(offset * sizeof(float)));
+		glEnableVertexAttribArray(i);
+		offset += size;
+	}
+
+	glBindVertexArray(0);
+}
+
+Mesh::~Mesh(){
+	glDeleteVertexArrays(1, &vao);
+	glDeleteBuffers(1, &vbo);
+}
+
+void Mesh::reload(const float* buffer, size_t vertices){
+	glBindVertexArray(vao);
+	glBindBuffer(GL_ARRAY_BUFFER, vbo);
+	glBufferData(GL_ARRAY_BUFFER, sizeof(float) * vertexSize * vertices, buffer, GL_STATIC_DRAW);
+	this->vertices = vertices;
+}
+
+void Mesh::draw(unsigned int primitive){
+	glBindVertexArray(vao);
+	glDrawArrays(primitive, 0, vertices);
+	glBindVertexArray(0);
+}