Merge pull request #38 from Databean/fixClicking

Fixed clicking on things

Author: PickledMonkey

src/Renderer.cpp

@@ -163,7 +163,7 @@ Coordinate screenToCoord(const pair<float, float>& screen) {
 	Coordinate ret;
 	float y_approx = (screen.second - 0.1f) / std::sin(angle) / scale;
 	ret.second = std::round(y_approx);
-	ret.first = std::round((screen.first - 0.2f) / scale - (screen.second - 0.1f) / scale / std::sin(angle) * std::cos(angle)) - 1;
+	ret.first = std::round((screen.first - 0.2f) / scale - y_approx * std::cos(angle) - 0.5);
 	return ret;
 }
 

tests/testRenderer.cpp

@@ -0,0 +1,20 @@
+#include <iostream>
+
+#include "UnitTest++.h"
+#include "Renderer.h"
+
+using std::cout;
+using std::endl;
+using std::make_pair;
+
+TEST(coordToScreen) {
+	for(int x = -5; x < 5; x++) {
+		for(auto y = -5; y < 5; y++) {
+			auto original = make_pair(x, y);
+			auto screen = coordToScreen(original);
+			auto back = screenToCoord(screen);
+			CHECK(original.first == back.first);
+			CHECK(original.second == back.second);
+		}
+	}
+}