Question Type: General Knowledge/Computer Graphics
This question tests your understanding of how different views are used in computer graphics rendering. The core concept is that certain view combinations are incompatible for creating a coherent and accurate visual representation.
Step-by-step explanation:
- Orthogonal projection represents objects in a way that preserves parallel lines. It is a form of parallel projection where the projection lines are perpendicular to the projection plane. In simple words, it's a "straight-on" view without perspective.
- Horizontal view implies viewing the scene from a horizontal plane, like looking straight ahead or down.
- The problem with combining these is that a purely horizontal view alone does not convey depth. Orthographic projection, without other views to show depth, will result in a flat and unclear image. To properly render a scene orthographically, you typically need multiple views (front, top, side) to fully define the object's shape in 3D space.
- Other options are not as problematic. Vertical and rear views, front and rear views, or a parallel and a perspective projection can be utilized together (with appropriate transformations) to create appropriate computer visuals.
Why other options are incorrect:
- Option 2 (Vertical view, rear projection): A vertical view and a rear projection can work together; they just provide different perspectives of the same object.
- Option 3 (Front-side, rear-side): These views are complementary; together, they give a comprehensive view of an object.
- Option 4 (Parallel projection, perspective projection): While stylistically different, these projections are often used together in specific design scenarios. A design might begin with a parallel projection for basic layout and then incorporate a perspective projection for a realistic touch.
Core Logic/Pattern: The core logic is recognizing the limitations of using only an orthogonal projection and a single horizontal viewpoint in accurately representing a three-dimensional object in computer graphics.
Therefore, the correct answer is Option 1: Orthogonal projection, horizontal view.
Important Questions from Three Dimensional Concepts
K-mean clustering algorithm has clustered the given 8 observations into 3 clusters after 1st iteration as follows:
C1 : {(3,3), (5,5), (7,7)}
C2 : {(0,6), (6,0), (3,0)}
C3 : {(8,8),(4,4)}
What will be the Manhattan distance for observation (4,4) from cluster centroid C1 in second iteration?
In the context of 3D computer graphics, which of the following statements is/are TRUE?
P: Orthographic transformations keep parallel lines parallel
Q: Orthographic transformations are affine transformations
Select the correct answer from the options given below:Given below are different properties of 3D projections from A-D. Identify the correct order on the basis of property true of (i) a perspective projection only, (ii) an orthographic projection only, (iii) both orthographic and projective transformations and (iv) neither orthographic nor projective transformation, respectively.
(A) Straight lines are mapped to straight lines.
(B) Distances and angles are (in general) preserved.
(C) Far away objects appear the same size as closer ones
(D) Requires homogeneous coordinates in order for it to be encoded into a linear transformation.
Choose the correct answer from the options given below:
Concerning phong shading and Gouraud shading in a 3D scene, which of the following statements are true ?
(A) Gouraud shading requires more computation than phong shading.
(B) Gouraud shading linearly interpolates the color of an interior pixel from the color at the vertices
(C) Phong shading interpolates over the normal vectors specified at the vertices.
Choose the correct answer from the options given below:
In the context of 3D Computer graphics, which of the following statements is/are correct?
(A) Under perspective projection, each set of parallel lines in the object do not stay parallel in the image (except those that are parallel to the viewplane to start with).
(B) Applying a perspective transformation in the graphics pipeline to a vertex involves dividing by its 'z' coordinate.
(C) Perspective transformation is a linear transformation.
Choose the correct answer from the options given below:
