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REQUIRE

@@ -1,9 +1,9 @@
 julia 1.0
+LinearAlgebra
 
 LinearAlgebraicRepresentation
 Triangle
 StaticArrays
-LinearAlgebra
 DataStructures
 VoronoiDelaunay
 QHull

examples/hpc/Convex2d.jl

@@ -0,0 +1,43 @@
+using QHull
+using Revise
+using ViewerGL
+GL = ViewerGL
+using Plasm, QHull
+
+# ////////////////////////////////////////////////////////////////////////
+function GLHull2d(points::Array{Float64,2})
+
+	ch = QHull.chull(points)
+	verts = ch.vertices
+	vdict = Dict(zip(verts, 1:length(verts)))
+	edges = [[vdict[u],vdict[v]] for (u,v) in ch.simplices]
+	points = points[verts,:]
+
+	faces = edges
+	vertices=Vector{Float32}()
+	normals =Vector{Float32}()
+	for face in faces
+		p2,p1=points[face[1],:],points[face[2],:]
+		t=p2-p1;  n=LinearAlgebra.normalize([-t[2];+t[1]])
+
+		p1 = convert(GL.Point3d, [p1; 0.0])
+		p2 = convert(GL.Point3d, [p2; 0.0])
+		n  = convert(GL.Point3d, [ n; 0.0])
+
+		append!(vertices,p1); append!(normals,n)
+		append!(vertices,p2); append!(normals,n)
+	end
+
+	ret=GL.GLMesh(GL.GL_LINES)
+	ret.vertices = GL.GLVertexBuffer(vertices)
+	ret.normals  = GL.GLVertexBuffer(normals)
+	return ret
+end
+
+
+points = rand(50,2)
+GL.VIEW([
+      # GL.GLCuboid(Box3d(GL.Point3d(0,0,0),GL.Point3d(1,1,1)))
+      GLHull2d(points)
+      GL.GLAxis(GL.Point3d(0,0,0),GL.Point3d(1,1,1))
+])

src/ViewerGL.jl

@@ -1,7 +1,6 @@
 module ViewerGL
 
 	using LinearAlgebra
-
 	using ModernGL
 	using GLFW
 	import Base:*