--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/dotproduct.d	Sat Sep 01 21:43:27 2007 +0200
@@ -0,0 +1,34 @@
+struct vec3
+{
+    float x,y,z;
+
+    float dot(ref vec3 v)
+    {
+        return x*v.x + y*v.y + z*v.z;
+    }
+
+    void print(char* n)
+    {
+        printf("%s = vec3(%.4f, %.4f, %.4f)\n", n, x,y,z);
+    }
+}
+
+int main()
+{
+    printf("Dot Product test\n");
+
+    const float f = 0.7071067811865474617f;
+    vec3 v = vec3(f,f,0);
+    vec3 w = vec3(f,0,f);
+
+    v.print("v");
+    v.print("w");
+
+    auto dp = v.dot(w);
+    printf("v · w = %f\n", dp);
+    assert(dp > 0.4999 && dp < 0.5001);
+
+    printf("  SUCCESS\n");
+    return 0;
+}
+