[GSOC] Added color properties to the ply&obj file

testdata/pointcloudio/orig.obj

@@ -2,14 +2,14 @@
 # www.blender.org
 mtllib cube.mtl
 o Cube_Cube.001
-v -5.93915 -0.13257 2.55837
-v -5.93915 1.86743 2.55837
-v -5.93915 -0.13257 -1.16339
-v -5.93915 1.86743 -1.16339
-v 0.399941 -0.13257 2.55837
-v 0.399941 1.86743 2.55837
-v 0.399941 -0.13257 -1.16339
-v 0.399941 1.86743 -1.16339
+v -5.93915 -0.13257 2.55837 0.0756 0.5651 0.5829
+v -5.93915 1.86743 2.55837 0.8596 0.1105 0.8455
+v -5.93915 -0.13257 -1.16339 0.8534 0.6143 0.3950
+v -5.93915 1.86743 -1.16339 0.0438 0.6308 0.3065
+v 0.399941 -0.13257 2.55837 0.9716 0.7170 0.8378
+v 0.399941 1.86743 2.55837 0.2472 0.7701 0.0234
+v 0.399941 -0.13257 -1.16339 0.6472 0.7467 0.5981
+v 0.399941 1.86743 -1.16339 0.3502 0.7954 0.0443
 vt 0.375000 0.000000
 vt 0.625000 0.000000
 vt 0.625000 0.250000

testdata/pointcloudio/orig.ply

@@ -5,17 +5,20 @@ element vertex 8
 property float x
 property float y
 property float z
+property uchar red
+property uchar green
+property uchar blue
 element face 12
 property list uchar uint vertex_indices
 end_header
--1.000000 -1.000000 1.000000
--1.000000 1.000000 1.000000
--1.000000 1.000000 -1.000000
-1.000000 1.000000 1.000000
-1.000000 1.000000 -1.000000
-1.000000 -1.000000 1.000000
-1.000000 -1.000000 -1.000000
--1.000000 -1.000000 -1.000000
+-1.000000 -1.000000 1.000000 12 29 67
+-1.000000 1.000000 1.000000 137 174 194
+-1.000000 1.000000 -1.000000 164 152 129
+1.000000 1.000000 1.000000 179 162 122
+1.000000 1.000000 -1.000000 97 172 125
+1.000000 -1.000000 1.000000 59 82 121
+1.000000 -1.000000 -1.000000 136 52 226
+-1.000000 -1.000000 -1.000000 23 32 29
 3 0 1 2
 3 1 3 4
 3 3 5 6