figure(1);
% first polygon (triangle)
x1 = [0 0 1]';
y1 = [0 1 0]';
c1 = [1 3 9]';
fill(x1, y1, c1);
% second polygon
x2 = [1 0 1]';
y2 = [0 1 1]';
c2 = [9 3 20]';
hold on;
fill(x2, y2, c2);
grid on;
colorbar;
colormap(jet(12));

# X Y Color
  0 0 1
  0 1 3
  1 0 9

  1 0 9
  0 1 3
  1 1 20

figure(2);
x1 = [0 1 0]';
y1 = [0 0 1]';
z1 = [0 0 0]';
c1 = [5 2 6]';
fill3(x1, y1, z1, c1);
x2 = [0 0 0]';
y2 = [0 1 0]';
z2 = [0 0 1]';
c2 = [5 6 9]';
hold on;
fill3(x2, y2, z2, c2);
x3 = [0 1 0]';
y3 = [0 0 0]';
z3 = [0 0 1]';
c3 = [5 2 9]';
hold on;
fill3(x3, y3, z3, c3);
x4 = [1 0 0]';
y4 = [0 0 1]';
z4 = [0 1 0]';
c4 = [2 9 6]';
hold on;
fill3(x4, y4, z4, c4);
grid on;
colorbar;
colormap(jet(12));

# X Y Z Color
  0 0 0 5
  1 0 0 2
  0 1 0 6

  0 0 0 5
  0 1 0 6
  0 0 1 9

  0 0 0 5
  1 0 0 2
  0 0 1 9

  1 0 0 2
  0 0 1 9
  0 1 0 6