Added test on Rotated Up Vector

test/unit/webgl/p5.Camera.js

@@ -289,6 +289,54 @@
     });
   });
 
+  suite('Camera Tilt and Up Vector', function() {
+    test('Tilt() correctly updates the up vector', function() {
+      var orig = getVals(myCam); // Store original camera values
+
+      // Apply tilt to the camera
+      myCam.tilt(30); // Tilt by 30 degrees
+      // Compute expected up vector (normalized)
+      let forward = myp5.createVector(
+        myCam.centerX - myCam.eyeX,
+        myCam.centerY - myCam.eyeY,
+        myCam.centerZ - myCam.eyeZ
+      );
+      let up = myp5.createVector(orig.ux, orig.uy, orig.uz);
+      let right = p5.Vector.cross(forward, up);
+      let expectedUp = p5.Vector.cross(right, forward).normalize();
+      // Verify that the up vector has changed
+      assert.notStrictEqual(myCam.upX, orig.ux, 'upX should be updated');
+      assert.notStrictEqual(myCam.upY, orig.uy, 'upY should be updated');
+      assert.notStrictEqual(myCam.upZ, orig.uz, 'upZ should be updated');
+      // Verify up vector matches expected values within a small margin of error
+      assert.closeTo(myCam.upX, expectedUp.x, 0.001, 'upX mismatch');
+      assert.closeTo(myCam.upY, expectedUp.y, 0.001, 'upY mismatch');
+      assert.closeTo(myCam.upZ, expectedUp.z, 0.001, 'upZ mismatch');
+    });
+
+    test('Tilt() with negative angle correctly updates the up vector', function() {
+      var orig = getVals(myCam); // Store original camera values
+      myCam.tilt(-30); // Tilt by -30 degrees
+      // Compute expected up vector (normalized)
+      let forward = myp5.createVector(
+        myCam.centerX - myCam.eyeX,
+        myCam.centerY - myCam.eyeY,
+        myCam.centerZ - myCam.eyeZ
+      );
+      let up = myp5.createVector(orig.ux, orig.uy, orig.uz);
+      let right = p5.Vector.cross(forward, up);
+      let expectedUp = p5.Vector.cross(right, forward).normalize();
+      // Verify that the up vector has changed
+      assert.notStrictEqual(myCam.upX, orig.ux, 'upX should be updated');
+      assert.notStrictEqual(myCam.upY, orig.uy, 'upY should be updated');
+      assert.notStrictEqual(myCam.upZ, orig.uz, 'upZ should be updated');
+      // Verify up vector matches expected values within a small margin of error
+      assert.closeTo(myCam.upX, expectedUp.x, 0.001, 'upX mismatch');
+      assert.closeTo(myCam.upY, expectedUp.y, 0.001, 'upY mismatch');
+      assert.closeTo(myCam.upZ, expectedUp.z, 0.001, 'upZ mismatch');
+    });
+  });
+
   suite('Rotation with angleMode(DEGREES)', function() {
     beforeEach(function() {
       myp5.push();