3D Printing - STL and File Preparation
Given a binary STL file with 1000 triangles, how many bytes are used to store the triangle data (excluding header and count)?
Given a binary STL file with 1000 triangles, how many bytes are used to store the triangle data (excluding header and count)?
medium📝 Analysis Q4 of 15
Step-by-Step Solution
Solution:
Step 1: Understand triangle data size in binary STL
Each triangle uses 50 bytes: 12 bytes for normal vector, 36 bytes for vertices (3 vertices x 12 bytes), and 2 bytes attribute byte count.Step 2: Calculate total bytes for 1000 triangles
50 bytes x 1000 triangles = 50,000 bytes. But the question excludes header and count, so only triangle data counts.Final Answer:
50,000 bytes -> Option BQuick Check:
Triangle data size = 50 bytes x count [OK]
Quick Trick: Each triangle = 50 bytes in binary STL [OK]
Common Mistakes:
MISTAKES- Including header or count bytes in calculation
- Using wrong bytes per triangle (e.g., 60 bytes)
- Multiplying by wrong triangle count
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