README.md

Mesh Primitive Modes

Tags

testing

Summary

An example that shows rendering modes that are supported for mesh primitives in glTF.

Operations

• Display in SampleViewer
• Model Directory

Screenshot

Description

Seven mesh primitive types: Points, Lines, Line Loops, Line Strips, Triangles, Triangle Strips, Triangle Fans.

Structure

The example contains seven meshes, each with one mesh primitive. All mesh primitives have the same vertex positions, forming a regular hexagon:

       3
   4       2
       0   
   5       1
       6

Each mesh primitive has a different mode, corresponding to the glTF mesh topology types. The indices of each mesh primitive for the respective modes are as follows:

• indices for mode=0 (POINTS): [0, 1, 2, 3, 4, 5, 6]
• indices for mode=1 (LINES): [0, 1, 0, 2, 0, 3, 0, 4, 0, 5, 0, 6]
• indices for mode=2 (LINE_LOOP): [0, 1, 2, 3, 4, 5, 6]
• indices for mode=3 (LINE_STRIP): [0, 1, 2, 3, 4, 5, 6]
• indices for mode=4 (TRIANGLES): [0, 1, 2, 0, 2, 3, 0, 3, 4, 0, 4, 5, 0, 5, 6, 0, 6, 1]
• indices for mode=5 (TRIANGLE_STRIP): [2, 3, 1, 4, 6, 5] (vertex 0 is unused here)
• indices for mode=6 (TRIANGLE_FAN): [0, 1, 2, 3, 4, 5, 6, 1]

Legal

© 2023, Public. CC0 1.0 Universal

• Marco Hutter for Everything

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