HW3

Goal

1. Draw a sphere and apply Phong shading or Gouraud shading on it.
2. Use keyboard to control the lighting parameters.

*Use GLSL to do this homework, otherwise youll get zero points.

Spec

Camera:

Position: (0, 0, 5.6) Center: (0, 0, 0)

Up vector: (0, 1, 0)

Sphere:

Slice: 20

Stack: 10

Radius: 1

Spec

Point light source : (draw a small sphere to represent the light source)

Position : (1.1, 1.0 , 1.3)

The color of the sphere : (0.4, 0.5, 0.0)

The radius of the sphere : 0.05

Keyboard control :

1 : The parameter Ks decreases from 1 to 0 (Ks -= 0.1)

2 : The parameter Ks increases from 0 to 1 (Ks += 0.1)

3 : The parameter Kd decreases from 1 to 0 (Kd -= 0.1)

4 : The parameter Kd increases from 0 to 1 (Kd += 0.1)

Spec

Phong Shading :

Ks = 0 (initial value)

Kd = 0 (initial value) Ka = 0.5 alpha = 3.6 la = (0.2, 0.2, 0.2) ld = (0.5, 0.5, 0.5) ls = (0.8, 0.8, 0.8)

Score

1. Successfully draw a sphere and apply Gouraud shading on it. (70%)

2. Switch to Phong shading (Use keyboard B). (10%)

3. Use keyboard to control the Kd and Ks parameters. (10%)

4. Demo (10%)

(We will ask you some questions about this homework)

5. Bonus : (10%)

(1).Change to tone mapping (5%) (Use keyboard B)

(Set the threshold to map the color into 4 Intensity levels.)

(2).Add border enhancement (5%)

(Use keyboard E to enable and disable the border)

Example video

Phong shading Phong shadingGouraud shadingTone mapping

Control Kd and Ks Border enhancement

Others

1. You can do this homework based on your HW2.
2. Zip your Visual Studio project into StudentID_HW3.zip , and upload it to New e3.
3. The deadline is at 11:55 pm on December 23.
4. If you submit your homework late, the score will be discounted. submit between (12/24 12/30) : Your final score * 0.9 submit between (12/31 1/6) : Your final score * 0.8 submit between (1/6~1/10) : Your final score * 0.7