Add drawImageRotated example to test-graphics project

The `Gear.png` image was custom created in Inkscape.

test-graphics/TestGraphics.cpp

@@ -6,6 +6,7 @@
 #include <NAS2D/Renderer/Renderer.h>
 #include <NAS2D/Resource/Font.h>
 #include <NAS2D/Math/Rectangle.h>
+#include "NAS2D/Math/Angle.h"
 
 #include <functional>
 #include <random>
@@ -42,6 +43,9 @@ namespace
 
 
 TestGraphics::TestGraphics() :
+	mTimer{},
+	mGear1{"Gear.png"},
+	mGear2{"Gear.png"},
 	mDxImage{"Test_DirectX.png"},
 	mOglImage{"Test_OpenGL.png"}
 {}
@@ -109,6 +113,10 @@ NAS2D::State* TestGraphics::update()
 		r.drawPoint(NAS2D::Point{84, 60} + offset, NAS2D::Color{grey, grey, grey});
 	}
 
+	const auto angle = NAS2D::Angle::degrees(static_cast<float>(mTimer.tick() * 360 / 10 / 1000));
+	r.drawImageRotated(mGear1, {158, 60}, angle);
+	r.drawImageRotated(mGear2, {219, 60}, -angle);
+
 	r.drawImage(mDxImage, {10, 134});
 	r.drawImage(mOglImage, {10 + 512, 134});
 

test-graphics/TestGraphics.h

@@ -2,6 +2,7 @@
 
 #include "NAS2D/State.h"
 #include "NAS2D/EventHandler.h"
+#include "NAS2D/Timer.h"
 #include "NAS2D/Resource/Image.h"
 
 
@@ -22,6 +23,9 @@ class TestGraphics : public NAS2D::State
 	void onWindowResized(int w, int h);
 
 private:
+	NAS2D::Timer mTimer;
+	NAS2D::Image mGear1;
+	NAS2D::Image mGear2;
 	NAS2D::Image mDxImage;
 	NAS2D::Image mOglImage;
 };