Graphics and Visual Computing Semi-Final Exam

What are the essential techniques used in computer graphics to simulate how light interacts with objects?

• Point Light

• Lighting and Shading

• Spotlight

What determines how objects are illuminated in computer graphics?

• Light sources, material properties, and the surface normal.

• Shadows, reflections, and refraction

• Shadow mapping, ray tracing, and shaders

What does shading refer to in the context of lighting and shading?

• Shading determines how objects are illuminated, using various light sources like point lights, directional lights or spotlights to define the direction, intensity and color of light.

• Shading refers to the technique of depicting shadows and light on surfaces to create depth and realism in visual representations, enhancing the perception of three-dimensionality.

• Shading determine light sources are used to simulate how real-world lighting affects objects in a scene

What is the function of a Point Light in computer graphics?

• Emits light equally in all directions from a single point.

• Represents a distant light source.

• Focuses light in a specific direction.

• Simulates light coming from a surface.

How does a Spot Light differ from a Point Light in computer graphics?

• It is used to create shadows on surfaces.

• It emits light equally in all directions.

• It emits light in a specific direction with a cone shape.

• It simulates ambient light in a scene.

What is the purpose of Ambient Light in a 3D scene?

• To create sharp shadows and highlights.

• To provide a uniform light level across the entire scene.

• To simulate light from a specific source.

• To enhance the color of objects in the scene.

What is the purpose of Specular Lightning in a 3S scene?

• Responsible for giving an object a softer, more natural appearance.

• Responsible for low-level illumination to all objects in the scene.

• Responsible for the intensity of shiny reflections.

• Responsible for creating shiny highlights on smooth surfaces.

What is the purpose of Diffuse Lightning in a 3S scene?

• Responsible for giving an object a softer, more natural appearance.

• Responsible for low-level illumination to all objects in the scene.

• Responsible for the intensity of shiny reflections.

• Responsible for creating shiny highlights on smooth surfaces.

What is Shadow Mapping in the context of shadows?

• A technique that renders the scene from the light’s perspective to determine which areas are in shadow.

• Simulates how light bounces off the surface of an object, creating the effect of reflections

• A more advanced method that traces the path of light rays to calculate where shadows fall.

• Occurs on highly smooth surfaces like mirrors, where light reflects directly, producing a clear and crisp image of other objects

What is Ray-traced in the context of shadows?

• A technique that renders the scene from the light’s perspective to determine which areas are in shadow.

• Simulates how light bounces off the surface of an object, creating the effect of reflections

• A more advanced method that traces the path of light rays to calculate where shadows fall.

• Occurs on highly smooth surfaces like mirrors, where light reflects directly, producing a clear and crisp image of other objects