IT2202 Textures, Lighting, and Shadows: Understanding Texture Mapping
20 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What are textures in the context of three-dimensional scenes?

  • Shadows applied to surfaces of geometric shapes
  • Colors applied to surfaces of geometric shapes
  • Lighting applied to surfaces of geometric shapes
  • Images applied to surfaces of geometric shapes (correct)

How many texture coordinate points are specified for the triangle in the given example?

  • 5
  • 3 (correct)
  • 4
  • 2

What does a (0,0) texture coordinate represent for a vertex in OpenGL?

  • Top-left side of the texture
  • Bottom-left side of the texture (correct)
  • Bottom-right side of the texture
  • Top-right side of the texture

What is the default behavior of OpenGL if texture coordinates are specified out of the range 0 to 1?

<p>Repeat the texture images (A)</p> Signup and view all the answers

How does OpenGL solve the issue of texture (texels) not being precisely the same size as the pixels in the rendered image?

<p>Mipmapping (A)</p> Signup and view all the answers

What is the purpose of texture coordinates in OpenGL?

<p>To retrieve the texture color using sampling (D)</p> Signup and view all the answers

Which lighting type represents light that has been scattered and will appear lighter or darker in various regions?

<p>Diffuse lighting (D)</p> Signup and view all the answers

What is the Phong model commonly used for?

<p>Combining ambient, diffuse, and specular lighting (B)</p> Signup and view all the answers

What does a mipmap consist of?

<p>Texture images where each subsequent texture is twice as small compared to the previous one (B)</p> Signup and view all the answers

What does the angle between the direction vector of the light ray and a vector perpendicular to the surface determine?

<p>The effect of a light source at a point (A)</p> Signup and view all the answers

What is the purpose of mipmapping in OpenGL?

<p>To solve the issue of texture (texels) not being precisely the same size as the pixels in the rendered image (A)</p> Signup and view all the answers

What happens if you specify texture coordinates out of the range 0 to 1 in OpenGL?

<p>The texture will be repeated or tiled (C)</p> Signup and view all the answers

How many texture coordinate points are typically passed to the vertex shader for interpolation in OpenGL?

<p>3 (D)</p> Signup and view all the answers

What does it mean if a mipmap is used in OpenGL?

<p>The texture will be pre-filtered and reduced in size (C)</p> Signup and view all the answers

What coordinates should be used for the top-right vertex of a triangle to correspond with the top-right side of a texture image in OpenGL?

<p>(1,1) (C)</p> Signup and view all the answers

What is the purpose of a mipmap in the context of texture mapping?

<p>To store multiple versions of the same texture at different resolutions (D)</p> Signup and view all the answers

What is the main function of texture coordinates in OpenGL?

<p>To specify the sampling location on the texture image for each vertex (B)</p> Signup and view all the answers

What does the Phong model, commonly used for reflective or shiny surfaces, combine in its illumination model?

<p>Ambient, diffuse, and specular lighting (A)</p> Signup and view all the answers

What is the role of ambient lighting in a scene?

<p>Affects all points on all geometric surfaces by the same amount (B)</p> Signup and view all the answers

How are texture coordinates represented in OpenGL for the lower-left and upper-right corners of a texture image?

<p>(0,0) and (1,1) (B)</p> Signup and view all the answers

More Like This

FQA 2-Testing
23 questions

FQA 2-Testing

BeneficialSense avatar
BeneficialSense
Metamorphic Textures in Geology
15 questions
Musical Textures Overview
5 questions
Use Quizgecko on...
Browser
Browser