i'm using the mesh library by lee byron  http://leebyron.com/else/mesh/

(although i'm open to another mesh library, whether it be toxi's, hemesh, or whatever)

what i'm trying to do is build a mesh that has a hole in it. essentially i'm creating a series of points that form a circle (the outer edges of the mesh) then creating a shape in the middle (triangle) and then populating it with random points. however when i create the delanay mesh all of the points are connected. 

so how do i create a mesh that only connects the points in the space between the middle shape (triangle) and the outer shape (circle). i don't want any lines or points to be in the middle? probably not a delanay mesh? or is it multiple delanay meshes?

any help/insight would be much appreciated.

here's some code (don't judge me... haha)

1. 
   
2. //-----------------------------------------------------------------------------
3. //libraries
4. //-----------------------------------------------------------------------------
5. import megamu.mesh.*;
6. 
   
7. //-----------------------------------------------------------------------------
8. Delaunay del;
9. float[][] delEdges;
10. 
    
11. PVector[] tri = new PVector[3];     //middle shape (hole)
12. ArrayList coord = new ArrayList();  //more flexible adding of points
13. float res;
14. int rand;
15. float rad;
16. 
    
17. void setup() {
18.   size(400,400);
19. 
    
20.   res = 36;
21.   rand = 10;
22.   rad = 100;
23. 
    
24.   createPoints();
25. }
26. 
    
27. void draw() {
28.   background(0);
29.   noFill();
30. 
    
31.   translate(width/2,height/2);
32. 
    
33.   //------------------------------------
34.   //facets  
35.   //------------------------------------
36.   stroke(255,0,255);  
37.   beginShape(LINES);
38.   //is there a way to use TRIANGLE_STRIP or QUAD_STRIP?
39.   //maybe even extract faces?
40.   for(int i=0; i<delEdges.length; i++) {
41.     float x1 = delEdges[i][0];
42.     float y1 = delEdges[i][1];
43.     float x2 = delEdges[i][2];
44.     float y2 = delEdges[i][3];
45. 
    
46.     vertex( x1,y1 );
47.     vertex( x2,y2 );
48.   }
49.   endShape(CLOSE);
50. 
    
51.   //------------------------------------
52.   //triangle
53.   //------------------------------------
54.   //just to see the triangle middle form
55.   stroke(0,255,255);
56.   triangle( tri[0].x, tri[0].y,
57.             tri[1].x, tri[1].y,
58.             tri[2].x, tri[2].y );
59. 
    
60. }
61. 
    
62. 
    
63. //-----------------------------------------------------------------------------
64. //methods
65. //-----------------------------------------------------------------------------
66. void createPoints() {
67.   coord.clear();
68. 
    
69.   //create triangle points
70.   //keeps them at the front of mt coords array
71.   //should the be seperate?
72.   int index = 0;
73.   for(int i=0; i<360; i+=360/tri.length) {
74.     float x = cos( radians(i) ) * rad * 0.61;
75.     float y = sin( radians(i) ) * rad * 0.61;
76.     tri[index] = new PVector(x,y);
77.     coord.add( tri[index].array() );
78. 
    
79.     index++;
80.   }
81. 
    
82.   //create points for circle
83.   for(int i=0; i<360/res; i++) {
84.     float x = cos( radians(i*res) ) * rad;
85.     float y = sin( radians(i*res) ) * rad;
86.     coord.add( new float[]{x,y} );
87.   }
88. 
    
89.   //create the random points
90.   //not sure how to exclude from the middle form
91.   for(int i=0; i<rand; i++) {
92.     float x = random( -cos( radians(i*res) ), cos( radians(i*res) ) ) * rad;
93.     float y = random( -sin( radians(i*res) ), sin( radians(i*res) ) ) * rad;
94.     coord.add( new float[]{x,y} );
95.   }
96. 
    
97.   del = new Delaunay( getFloatArray(coord) );
98.   delEdges = del.getEdges();
99. }
100. 
     
101. float[][] getFloatArray(ArrayList a) {
102.   float[][] floatArray = new float[a.size()][3];
103.   
104.   for(int i=0; i<a.size(); i++) {
105.     float[] temp = (float[]) a.get(i);
106.     floatArray[i] = temp; 
107.   }
108. 
     
109.   return floatArray;
110. }
111. 
     
112. //-----------------------------------------------------------------------------
113. //interactvitiy
114. //-----------------------------------------------------------------------------
115. void mousePressed() {
116.   createPoints();
117. }