Method rectangle

envs/gs/SIBR_viewers/src/core/view/ImagesGrid.cpp:273–298

	}

	void DrawUtilities::rectangle(const Vector3f & color, const Vector2f & tl, const Vector2f & br, bool fill, float alpha, const Viewport & vp)
	{
		auto rectangleMesh = std::make_shared<Mesh>();

		rectangleMesh->vertices({
			{ tl.x(), tl.y() , 0 },
			{ tl.x(), br.y() , 0 },
			{ br.x(), br.y() , 0 },
			{ br.x(), tl.y() , 0 }
			});

		if (fill) {
			rectangleMesh->triangles({
				{ 0,1,2 },
				{ 0,2,3 }
				});

			baseRendering(*rectangleMesh, Mesh::FillRenderMode, color, { 0,0 }, { 1,1 }, alpha, vp);
		}

		rectangleMesh->triangles({
			{ 0,0,1 },{ 1,1,2 },{ 2,2,3 },{ 3,3,0 }
			});

		baseRendering(*rectangleMesh, Mesh::LineRenderMode, color, { 0,0 }, { 1,1 }, 1.0f, vp);
	}

	void DrawUtilities::rectanglePixels(const Vector3f & color, const Vector2f & center, const Vector2f & diagonalPixs, bool fill, float alpha, const Viewport & vp)
	{