From fbc5f2ea555c2ef5440028ff3d5648ee2efca74a Mon Sep 17 00:00:00 2001
From: Irlan <->
Date: Thu, 3 May 2018 20:17:14 -0300
Subject: [PATCH] control primitive drawing order

---
 examples/testbed/tests/collide_test.h |  2 ++
 examples/testbed/tests/convex_hull.h  | 49 ++++++++++++++++++++++++---
 2 files changed, 47 insertions(+), 4 deletions(-)

diff --git a/examples/testbed/tests/collide_test.h b/examples/testbed/tests/collide_test.h
index aa95433..4818df3 100644
--- a/examples/testbed/tests/collide_test.h
+++ b/examples/testbed/tests/collide_test.h
@@ -60,6 +60,8 @@ public:
 
 		g_draw->DrawString(b3Color_white, "Left/Right/Up/Down Arrow - Translate shape");
 		g_draw->DrawString(b3Color_white, "X/Y/Z - Rotate shape");
+		
+		g_draw->Flush();
 	}
 
 	virtual void KeyDown(int key)
diff --git a/examples/testbed/tests/convex_hull.h b/examples/testbed/tests/convex_hull.h
index 662cea7..26d6e82 100644
--- a/examples/testbed/tests/convex_hull.h
+++ b/examples/testbed/tests/convex_hull.h
@@ -72,11 +72,52 @@ public:
 		b3QHull hull;
 		hull.Set(m_points, m_count);
 
-		b3HullShape shape;
-		shape.m_hull = &hull;
+		for (u32 i = 0; i < m_count; ++i)
+		{
+			b3Draw_draw->DrawPoint(m_points[i], 4.0f, b3Color_green);
+		}
+
+		for (u32 i = 0; i < hull.edgeCount; i += 2)
+		{
+			const b3HalfEdge* edge = hull.GetEdge(i);
+			const b3HalfEdge* twin = hull.GetEdge(i + 1);
+
+			b3Vec3 v1 = hull.GetVertex(edge->origin);
+			b3Vec3 v2 = hull.GetVertex(twin->origin);
+
+			b3Draw_draw->DrawSegment(v1, v2, b3Color_black);
+		}
+
+		g_draw->Flush();
+
+		for (u32 i = 0; i < hull.faceCount; ++i)
+		{
+			const b3Face* face = hull.GetFace(i);
+			const b3HalfEdge* begin = hull.GetEdge(face->edge);
+
+			b3Vec3 n = hull.GetPlane(i).normal;
+
+			const b3HalfEdge* edge = hull.GetEdge(begin->next);
+			do
+			{
+				u32 i1 = begin->origin;
+				u32 i2 = edge->origin;
+				const b3HalfEdge* next = hull.GetEdge(edge->next);
+				u32 i3 = next->origin;
+
+				b3Vec3 v1 = hull.GetVertex(i1);
+				b3Vec3 v2 = hull.GetVertex(i2);
+				b3Vec3 v3 = hull.GetVertex(i3);
+
+				b3Color solidColor(1.0f, 1.0f, 1.0f, 0.5f);
+				g_draw->DrawSolidTriangle(n, v1, v2, v3, solidColor);
+
+				edge = next;
+			} while (hull.GetEdge(edge->next) != begin);
+		}
+
+		g_draw->Flush();
 
-		g_draw->DrawSolidShape(&shape, b3Color_white, b3Transform_identity);
-		
 		g_draw->DrawString(b3Color_white, "G - Generate a random convex hull");
 	}