made const

headers/Mandelbrot.h

@@ -16,7 +16,7 @@ private:
 	int iterations = 0;
 	double scale = 1;
 	QVector2D translation;
-	void setShaderValues(QOpenGLShaderProgram&);
+	void setShaderValues(QOpenGLShaderProgram&) const;
 };
 
 

src/Mandelbrot.cpp

@@ -13,7 +13,7 @@ void Mandelbrot::draw(GLuint vao, QOpenGLShaderProgram& shader) {
 	glBindVertexArray(0);
 }
 
-void Mandelbrot::setShaderValues(QOpenGLShaderProgram &shader) {
+void Mandelbrot::setShaderValues(QOpenGLShaderProgram &shader) const {
 	shader.setUniformValue("origin", QVector2D(-1, 1));
 	shader.setUniformValue("size", QVector2D(2, 2));
 	shader.setUniformValue("iterationCount", iterations);