Remove error checking in Model getSurfacePoints.

src/tracer/model/Model.java

@@ -17,9 +17,10 @@
 public interface Model extends Copyable<Model> {
 
     /**
-     * Returns aleatory surface points with uniform probability of the model.
+     * Returns aleatory surface points with uniform probability of the model, if the count is less than 1, a zero sized
+     * vector array is returned.
      *
-     * @param count the number of points to get (can not be less than 1)
+     * @param count the number of points to get
      * @return points of the surface
      */
     Vector3[] getSurfacePoints(int count);

src/tracer/model/Sphere.java

@@ -89,9 +89,6 @@ public Model copy() {
 
     @Override
     public Vector3[] getSurfacePoints(int count) {
-        if (count < 1) {
-            throw new IllegalArgumentException("The count should be greater than 0.");
-        }
         Vector3[] surfacePoints = new Vector3[count];
         for (int i = 0; i < count; i++) {
             surfacePoints[i] = TTRand.onPolarSphere().scale(radius).sum(center);

src/tracer/model/Triangle.java

@@ -67,9 +67,6 @@ public Model copy() {
 
     @Override
     public Vector3[] getSurfacePoints(int count) {
-        if (count < 1) {
-            throw new IllegalArgumentException("The count should be greater than 0.");
-        }
         Random prng = new Random();
         Vector3[] surfacePoints = new Vector3[count];
         for (int i = 0; i < count; i++) {