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Introduction to 3D Graphics. Computer Graphics. Animation. Rendering. …. Vector Graphics. Raster Graphics. Solid Modeling. Scientific Visualization. Rendering. Computer graphics is “the creation and manipulation of graphics images by means of computer.” (Marc Berger, 1986.). 681-782.

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Computer Graphics

Animation

Rendering

Vector Graphics

Raster Graphics

Solid Modeling

Scientific Visualization

Rendering

Computer graphics is “the creation and manipulation of graphics images by means of computer.” (Marc Berger, 1986.)

681-782

Real-time

694A,682?

781

784

Coming soon…

CSE 681

vector graphics
Vector Graphics

Draw a picture line by line.

  • Advantages:
  • Straight lines.
  • Hardward supports high resolution
  • Drawbacks:
  • Not solid imagery (wireframe).
  • Vector hardware continually redraws all objects.

CSE 681

raster graphics
Raster Graphics

n x m grid of pixels

  • Advantages:
  • Based on TV technology
  • Lends itself to shaded imagery
  • Problems:
  • Needs a frame buffer
  • Convert objects to pixels
  • Aliasing: Screen resolution may be much less than object resolution.

CSE 681

2d v 3d
2D v. 3D

y

Window

x

Viewport

SCREEN

CSE 681

3d graphics
3D Graphics

3D Graphics

Modeling

Rendering

Animating

Vector Graphics

Raster Graphics

Scan Conversion

Ray Tracing

CSE 681

scan conversion

Image plane

Scan Conversion
  • Transform 3d object into 2d object (object-based)
  • “Scan” 3d object, converting it into pixels.
  • Fast;
  • Commonly used;
  • Industry standard – OpenGL;
  • Hardware support (OpenGL).

CSE 681

ray tracing
Ray Tracing
  • Shoot a ray through each pixel (pixel-based)
  • Find first object intersected by ray.

Image plane

Eye

  • Slow;
  • Not commonly used;
  • No hardware support.

CSE 681

scan conversion v ray tracing
Scan Conversion v. Ray Tracing
  • Ray Tracing
  • (CSE 681)
  • Models optics (better);
  • Photorealistic rendering;
  • Special effects;
  • Better for understanding rendering/lighting.

Scan Conversion

(CSE 581, 781, …)

  • Fast;
  • Commonly used;
  • Industry standard (OpenGL);
  • Hardware support.

CSE 681

creating a scene
Creating a Scene
  • Translate & rotate objects.
  • Linear algebra. (Prerequisite: Math 568 or 571.)

CSE 681