Young Wu's Homepage

📗 Please wait for the message "Successful submission." to appear after the "Submit" button. If there is an error message or no message appears after 10 seconds, please email the instructor or make a Piazza post about it. You could submit multiple times (but please do not submit too often): only the latest submission will be counted.

📗 [1 points] Which one of the following objects can be added to a scene = new THREE.Scene() using scene.add(x)?

x = new THREE.Mesh();
x = new THREE.SpotLight();
x = new THREE.PerspectiveCamera();
x = new THREE.BoxGeometry();
x = new THREE.MeshPhongMaterial();
None of the above.

📗 [1 points] A target can be set for which of the following lights using light.target = new THREE.Object3D();?

📗 Note: HemisphereLight does not have a target.

light = new THREE.DirectionalLight();
light = new THREE.SpotLight();
light = new THREE.HemisphereLight();
light = new THREE.PointLight();
light = new THREE.AmbientLight();
None of the above.

📗 [1 points] Given the only objects in the scene a light = new THREE.PointLight("white", 1, 5) and a sphere = new THREE.Mesh(new THREE.SphereGeometry(1), new THREE.MeshStandardMaterial());, which of the following positions of the sphere result in the sphere being (partially) visible?

sphere.position.set(1, 2, 3);
sphere.position.set(2, 2, 2);
sphere.position.set(5, 0, 0);
sphere.position.set(5, 5, 0);
sphere.position.set(5, 5, 5);
None of the above.

📗 [1 points] The color of a point on the surface of a mesh = new THREE.Mesh(new THREE.SphereGeometry(1), new THREE.MeshStandardMaterial()); depends on which of the following? Assume light = new THREE.PointLight(); and mesh is visible under light.

mesh.material.roughness
mesh.material.metalness
light.color
light.intensity
mesh.material.shininess
None of the above.

📗 [1 points] Which of the following parameters for a material = new THREE.MeshStandardMaterial(x); show specular reflection of a light = new THREE.PointLight(); on the surface of a sphere = new THREE.Mesh(new THREE.SphereGeometry(1), material);?

x = {roughness: 0.5, metalness: 0.5}
x = {roughness: 0, metalness: 1}
x = {roughness: 0.75, metalness: 0.25}
x = {roughness: 0.25, metalness: 0.75}
x = {roughness: 1, metalness: 0}
None of the above.

📗 [1 points] Which of the following spheres appear the largest when using camera = new OrthographicCamera(5, -5, 5, -5, 0, 10);? Suppose s1 = new THREE.Mesh(new THREE.SphereGeometry(1), new MeshBasicMaterial()); and s2 = new THREE.Mesh(new THREE.SphereGeometry(2), new MeshBasicMaterial());

s2.position.set(0, 0, 5);
s2.position.set(0, 0, 10);
s1.position.set(0, 0, 5);
s1.position.set(0, 0, 10);
s2.position.set(0, 0, 15);
None of the above.

📗 [1 points] Which of the following points are in the camera frustum of camera = new PerspectiveCamera(45, 1, 2, 4); with camera.position.set(0, 0, 0); and camera.lookAt(0, 0, 1);?

THREE.Vector3(0, 0, 3)
THREE.Vector3(0, 0, 6)
THREE.Vector3(0, 0, 1)
THREE.Vector3(0, 0, 0)
THREE.Vector3(0, 0, -3)
None of the above.

📗 [1 points] Which of the following lines rotate the camera = new PerspectiveCamera(); to look at the position Vector3(1, 1, 1)? Suppose box = new THREE.Mesh(); with box.position.set(1, 1, 1); and scene.add(box);.

camera.lookAt(1, 1, 1);
camera.lookAt(new Vector3(1, 1, 1));
camera.lookAt(box.position);
camera.lookAt(box);
camera.lookAt(box.parent);
None of the above.

# QS6: Week 6 Survey Questions

# Grade

# Submission