intro-solids.md

sidebar_position	1
title	Solids
sidebar_label	Intro Solids
description	Learn how to create solids
tags	code occt rete blockly typescript

import Tabs from '@theme/Tabs'; import TabItem from '@theme/TabItem'; import BitByBitRenderCanvas from '@site/src/components/BitByBitRenderCanvas';

Introduction to OCCT Solids

Solids are three-dimensional shapes that represent complete geometric objects with volume. OCCT provides several primitive solid types that serve as building blocks for more complex 3D modeling operations. These primitives are commonly used in CAD applications and can be combined, modified, and transformed to create sophisticated geometries.

This example demonstrates the creation of the most common primitive solid types:

• Box: A rectangular solid with specified width, length, and height
• Cube: A special case of a box where all dimensions are equal
• Cylinder: A circular solid with specified radius and height
• Sphere: A perfectly round solid with a specified radius
• Cone: A tapered solid with different radii at top and bottom

boxcubecylindersphereconebox378000TRUEcube5500TRUEcylinder23-500010360TRUEsphere1.51000cone213360-1000010boxcubecylinderspherecone","version":"0.20.7","type":"blockly"}} title="Creating primitive solids" /> {\n // Create a rectangular box\n const boxOptions = new BoxDto();\n boxOptions.width = 3;\n boxOptions.length = 7;\n boxOptions.height = 8;\n boxOptions.center = [0, 0, 0] as Point3;\n boxOptions.originOnCenter = true;\n \n const box = await solid.createBox(boxOptions);\n \n // Create a cube at a different position\n const cubeOptions = new CubeDto();\n cubeOptions.size = 5;\n cubeOptions.center = [5, 0, 0] as Point3;\n cubeOptions.originOnCenter = true;\n \n const cube = await solid.createCube(cubeOptions);\n \n // Create a cylinder\n const cylinderOptions = new CylinderDto();\n cylinderOptions.radius = 2;\n cylinderOptions.height = 3;\n cylinderOptions.center = [-5, 0, 0] as Point3;\n cylinderOptions.direction = [0, 1, 0] as Vector3;\n cylinderOptions.angle = 360;\n cylinderOptions.originOnCenter = true;\n \n const cylinder = await solid.createCylinder(cylinderOptions);\n \n // Create a sphere\n const sphereOptions = new SphereDto();\n sphereOptions.radius = 1.5;\n sphereOptions.center = [10, 0, 0] as Point3;\n \n const sphere = await solid.createSphere(sphereOptions);\n \n // Create a cone\n const coneOptions = new ConeDto();\n coneOptions.radius1 = 2;\n coneOptions.radius2 = 1;\n coneOptions.height = 3;\n coneOptions.angle = 360;\n coneOptions.center = [-10, 0, 0] as Point3;\n coneOptions.direction = [0, 1, 0] as Vector3;\n \n const cone = await solid.createCone(coneOptions);\n \n // Draw all the created solids\n bitbybit.draw.drawAnyAsync({ entity: box });\n bitbybit.draw.drawAnyAsync({ entity: cube });\n bitbybit.draw.drawAnyAsync({ entity: cylinder });\n bitbybit.draw.drawAnyAsync({ entity: sphere });\n bitbybit.draw.drawAnyAsync({ entity: cone });\n}\n\n// Execute the function\nstart();","version":"0.20.7","type":"typescript"}} title="Creating primitive solids" />

These primitive solids serve as the foundation for more complex 3D modeling operations. They can be combined using boolean operations (union, intersection, difference), transformed, and modified to create sophisticated geometries for engineering and design applications.