Check if normals and uvs are null

Author: yuripourre

src/main/java/org/sunflow/core/parameter/geometry/GenericMeshParameter.java

@@ -20,16 +20,20 @@ public void setup(SunflowAPIInterface api) {
         api.parameter("points", "point", "vertex", points);
         api.parameter("triangles", triangles);
 
-        if (!faceVaryingNormals) {
-            api.parameter("normals", "vector", "vertex", normals);
-        } else {
-            api.parameter("normals", "vector", "facevarying", normals);
+        if (normals != null) {
+            if (!faceVaryingNormals) {
+                api.parameter("normals", "vector", "vertex", normals);
+            } else {
+                api.parameter("normals", "vector", "facevarying", normals);
+            }
         }
 
-        if (!faceVaryingTextures) {
-            api.parameter("uvs", "texcoord", "vertex", uvs);
-        } else {
-            api.parameter("uvs", "texcoord", "facevarying", uvs);
+        if (uvs != null) {
+            if (!faceVaryingTextures) {
+                api.parameter("uvs", "texcoord", "vertex", uvs);
+            } else {
+                api.parameter("uvs", "texcoord", "facevarying", uvs);
+            }
         }
 
         if (faceShaders != null) {

src/test/java/org/sunflow/core/primitive/TriangleMeshTest.java

@@ -0,0 +1,28 @@
+package org.sunflow.core.primitive;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.sunflow.math.Point3;
+
+public class TriangleMeshTest {
+
+    TriangleMesh mesh;
+
+    @Before
+    public void setUp() {
+        mesh = new TriangleMesh();
+    }
+
+    @Test
+    public void testInit() {
+        mesh.points = new float[]{0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 6, 7, 7, 7, 8, 8, 8};
+        mesh.triangles = new int[]{0, 1, 2, 3, 4, 5, 6, 7, 8};
+
+        Assert.assertEquals(3, mesh.getNumPrimitives());
+
+        Assert.assertEquals(new Point3(0, 0, 0), mesh.getPoint(0));
+        Assert.assertEquals(new Point3(1, 1, 1), mesh.getPoint(1));
+        Assert.assertEquals(new Point3(2, 2, 2), mesh.getPoint(2));
+    }
+}