{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Applying background part 2

Applying background part 2 - 23 Polygonal Meshes ■ many...

This preview shows pages 1–3. Sign up to view the full content.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 23 Polygonal Meshes ■ many algorithms assume triangular meshes ◆ hardware support ◆ always convex ◆ always planar ✦ polygon normal vector easy to compute N N n P P P P N H H H H = − × − = ) ( ) ( 2 1 24 Polygonal Meshes: Per Vertex Normal Vectors ■ a mesh usually approximation for smooth surface ◆ for shading want normal vector of smooth surface ✦ store this information only at mesh vertices • example: normal vectors shown as arrows, vertices as dots • important: normal vectors are perpendicular to “true” smooth surface ■ usually most convenient to store normalized (unit) normal vectors 25 Polygonal Meshes: Operations ■ rendering ■ simplification ◆ given a mesh, compute a new mesh that looks the same as the old mesh but has fewer vertices and faces ■ smoothing ◆ given a mesh, compute a new mesh that looks smoother than the old mesh ■ animation or warping ■ slicing ◆ cut a mesh into two or more meshes 26 Polygonal Meshes: Operations (cont) ■...
View Full Document

{[ snackBarMessage ]}

Page1 / 5

Applying background part 2 - 23 Polygonal Meshes ■ many...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online