initial commit

Painty.cpp

@@ -0,0 +1,61 @@
+#include "Painty.h"
+#include <cmath>
+
+Painty::Painty()
+{
+
+}
+
+void Painty::setXY(int idx, float x, float y) {
+	if (points.size() < idx+1) {points.resize(idx+1);}
+	points[idx] = QPointF(x,y);
+	emit update();
+}
+
+void Painty::setSigma(double s) {
+	this->sigma = s;
+	emit update();
+}
+
+#include <QPainter>
+void Painty::paint(QPainter* p) {
+
+	p->setPen(Qt::blue);
+	p->drawLine(0,0,100,100);
+
+	const double s = sigma;
+
+	static QImage img(width(), height(), QImage::Format_ARGB32);
+	std::vector<double> vec;
+
+	if (points.size() < 3) {return;}
+
+	double max = 0;
+	for (int y = 0; y < height(); ++y) {
+		for (int x = 0; x < width(); ++x) {
+			double sum = 0;
+			for (const QPointF p : points) {
+				const double dx = x-p.x();
+				const double dy = y-p.y();
+				const double dist = std::sqrt(dx*dx+dy*dy);
+				sum += 1.0 / std::sqrt(2*M_PI*s*s) * std::exp(- (dist*dist)/(2*s*s) );
+			}
+			vec.push_back(sum);
+			if (sum > max) {max = sum;}
+		}
+	}
+
+	for (size_t idx = 0; idx < vec.size(); ++idx) {
+		int x = idx % (int) width();
+		int y = idx / width();
+		double h = 1.0 - vec[idx]/max;
+		QColor c = QColor::fromHsvF(h, 0.5, 1);
+		img.setPixelColor(x, y, c);
+
+	}
+
+	p->drawImage(0, 0, img);
+
+
+
+}