CPlusPlusProjectTemplate/main.cpp

#define OLC_PGE_APPLICATION
#include "pixelGameEngine.h"

using namespace olc;

class BoxBorder : public olc::PixelGameEngine
{
public:
	BoxBorder()
	{
		sAppName = "Box Border";
	}

public:
	Decal*box;

	void DrawBorderBox(const vd2d&pos,const vd2d&size,const vd2d&borderScale={1,1}) {
		vd2d scaledCorner={13*(float)borderScale.x,13*(float)borderScale.y};
		DrawPartialDecal(pos,scaledCorner,box,{0,0},{13,13}); //Upper-Left Corner
		vd2d ULOffset={13*(float)borderScale.x,0};
		DrawPartialDecal(pos+ULOffset,{(float)size.x-26*(float)borderScale.x,13*(float)borderScale.y},box,{13,0},{91,13}); //Top
		vd2d UROffset={size.x-13*(float)borderScale.x,0};
		DrawPartialDecal(pos+UROffset,scaledCorner,box,{104,0},{13,13}); //Upper-Right Corner
		vd2d ULBottomOffset={0,13*(float)borderScale.y};
		DrawPartialDecal(pos+ULBottomOffset,{13*(float)borderScale.x,(float)size.y-25*(float)borderScale.y},box,{0,13},{13,73});//Left
		vd2d BLOffset={0,size.y-13*(float)borderScale.y};
		DrawPartialDecal(pos+BLOffset,scaledCorner,box,{0,86},{13,13}); //Bottom-Left Corner
		vd2d BLLeftOffset={13*(float)borderScale.x,size.y-(13+0.05)*(float)borderScale.y};
		DrawPartialDecal(pos+BLLeftOffset,{(float)size.x-26*(float)borderScale.x,13*(float)borderScale.y},box,{13,86},{91,13}); //Bottom
		vd2d BROffset={size.x-13*(float)borderScale.x,size.y-13*(float)borderScale.y};
		DrawPartialDecal(pos+BROffset,scaledCorner,box,{104,86},{13,13}); //Bottom-Right Corner
		vd2d TROffset={size.x-13*(float)borderScale.x,13*(float)borderScale.y};
		DrawPartialDecal(pos+TROffset,{13*(float)borderScale.x,(float)size.y-25*(float)borderScale.y},box,{104,13},{13,73});//Right
	}

	bool OnUserCreate() override
	{
		box = new Decal(new Sprite("border.png"),false,true);
		return true;
	}

	vd2d borderSize={1,1};

	bool OnUserUpdate(float fElapsedTime) override
	{
		if (GetMouseWheel()>0) {
			borderSize.x+=0.1;
			borderSize.y+=0.1;
		} else 
		if (GetMouseWheel()<0) {
			borderSize.x-=0.1;
			borderSize.y-=0.1;
		}

		vd2d boxPos={24,24};
		vd2d boxSize=GetMousePos()-boxPos;
		FillRectDecal(boxPos,boxSize,GREY);
		DrawBorderBox(boxPos,boxSize,borderSize);
		return true;
	}
};


int main()
{
	BoxBorder demo;
	if (demo.Construct(256, 240, 4, 4))
		demo.Start();

	return 0;
}