Add rtgrpblib_draw_circular_arc

Signed-off-by: Mattias Andrée <maandree@kth.se>

1 files changed, 19 insertions, 2 deletions

diff --git a/demo.c b/demo.c
index 76473e7..6157fbd 100644
--- a/demo.c
+++ b/demo.c
@@ -26,11 +26,16 @@ main(void)
 		{35, 15},
 		{20, 25},
 		{5, 15}
-#else
+#elif 0
 		{5.25, 5.25},
 		{35.75, 5.25},
 		{35.75, 25.75},
 		{5.25, 25.75}
+#else
+		/* for circular arch*/
+		{20, 15},
+		{15, 10},
+		{100 * M_PI/180, 400 * M_PI/180}
 #endif
 	};
 
@@ -46,9 +51,21 @@ main(void)
 #elif 0
 	rtgrpblib_draw_quadratic_bezier(raster, P(2), P(3), P(0));
 	rtgrpblib_draw_linear_bezier(raster, P(0), P(2));
-#else
+#elif 0
 	rtgrpblib_draw_cubic_bezier(raster, P(0), P(1), P(2), P(3));
 	rtgrpblib_draw_linear_bezier(raster, P(3), P(0));
+#else
+	rtgrpblib_draw_circular_arc(raster, P(0), P(1), P(2));
+	rtgrpblib_draw_linear_bezier(raster,
+	                             points[0].x + points[1].x * cos(points[2].y),
+	                             points[0].y + points[1].y * sin(points[2].y),
+	                             points[0].x,
+	                             points[0].y);
+	rtgrpblib_draw_linear_bezier(raster,
+	                             points[0].x,
+	                             points[0].y,
+	                             points[0].x + points[1].x * cos(points[2].x),
+	                             points[0].y + points[1].y * sin(points[2].x));
 #endif
 
 	rtgrpblib_fill_shapes(image, width, raster);