arthurx70/mayo

3D CAD viewer and converter based on Qt + OpenCascade

What is Mayo

Mayo is a 3D viewer and converter inspired by FreeCad

Overview

• View and convert 3D files in different formats
• Explore assembly trees and view properties
• Cross platform: runs on Windows and Linux
• Underlying toolkits: OpenCascade and Qt

Current features

• Support of multi-documents, user can open many files in the session
• Support of STEP/IGES assemblies(product structure and colors)
• Area and volume properties for meshes and shapes
• Editable name of STEP/IGES entities
• Editable 3D properties of the imported items, eg. material, color, display mode, ...
• 3D clip planes with configurable capping
• 3D view cube providing intuitive camera manipulation
• Perspective/orthographic 3D view projection
• Save image(snapshot) of the current 3D view

3D viewer operations :

• Rotate : mouse left + move
• Pan : mouse right + move
• Zoom : mouse wheel(scroll)
• Window zoom : mouse wheel + move
• Instant zoom : space bar

Supported formats

Formats	Import	Export	Notes
STEP	✔	✔	AP203, 214, 242(some parts)
IGES	✔	✔	v5.3
OpenCascade BREP	✔	✔
OBJ	✔	❌	Requires OpenCascade ≥ v7.4.0
glTF	✔	✔	Import requires OpenCascade ≥ v7.4.0 Export requires OpenCascade ≥ v7.5.0 Supports 1.0, 2.0 and GLB
VRML	❌	✔	v2.0 UTF8
STL	✔	✔	ASCII/binary

Gallery

Build instructions

Mayo requires Qt5 and OpenCascade ≥ 7.3.0

• Qt installer
• OpenCascade Download Center

It uses the CSF_OCCTIncludePath and CSF_OCCTLibPath environment variables to locate OpenCascade include and library paths. On Windows these two variables are set by the env.bat script which can be found within OpenCascade's base folder, it is recommended to run this script and then build Mayo :

cd .../mayo
qmake
(n)make

In case you don't want to run OpenCascade env.bat you can use the CASCADE_INC_DIRand CASCADE_LIB_DIR qmake variables instead :

qmake "CASCADE_INC_DIR=occ_include_dir" "CASCADE_LIB_DIR=occ_library_dir"