added vao

headers/Mandelbrot.h

@@ -2,9 +2,9 @@
 #pragma once
 
 #include <QVector2D>
-#include <QOpenGLFunctions>
+#include <QOpenGLFunctions_3_3_Core>
 
-class Mandelbrot : public QObject, protected QOpenGLFunctions {
+class Mandelbrot : public QObject, protected QOpenGLFunctions_3_3_Core {
 Q_OBJECT
 public:
 	void init();
@@ -13,6 +13,9 @@ public:
 public slots:
 	void setIterations(int);
 private:
+	static float* genVertices();
+	GLuint createVAO();
+	GLuint vao;
 	int iterations = 0;
 	double scale = 1;
 	QVector2D translation;

headers/OutputWidget.h

@@ -3,11 +3,10 @@
 
 
 #include <QWidget>
-#include <QOpenGLFunctions>
 #include <QOpenGLWidget>
 #include "Mandelbrot.h"
 
-class OutputWidget : public QOpenGLWidget, protected QOpenGLFunctions {
+class OutputWidget : public QOpenGLWidget, protected QOpenGLFunctions_3_3_Core {
 	Q_OBJECT
 public:
 	explicit OutputWidget(QWidget* parent): QOpenGLWidget(parent) {}

src/Mandelbrot.cpp

@@ -4,7 +4,7 @@
 void Mandelbrot::init() {
 	initializeOpenGLFunctions();
 
-
+	vao = createVAO();
 }
 
 void Mandelbrot::draw() {
@@ -19,4 +19,34 @@ void Mandelbrot::setIterations(int value) {
 	iterations = value;
 }
 
+GLuint Mandelbrot::createVAO() {
+	GLuint vboId;
+	glGenBuffers(1, &vboId);
+	glBindBuffer(GL_ARRAY_BUFFER, vboId);
+
+	float* vertices = genVertices();
+	glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
+
+	GLuint vaoId;
+	glGenVertexArrays(1, &vaoId);
+	glBindVertexArray(vaoId);
+	glBindBuffer(GL_ARRAY_BUFFER, vboId);
+
+	glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 2 * sizeof(float), (void*) nullptr);
+	glEnableVertexAttribArray(0);
+
+	glBindVertexArray(0);
+
+	return vaoId;
+}
+
+float* Mandelbrot::genVertices() {
+	return new float[8]{
+			-1, -1,
+			1, -1,
+			1, 1,
+			-1, 1
+	};
+}
+