Looking to extrude a quarter Circle Geometry in Three.js?
To create the quarter circle, you can use the following code:
var circle = new THREE.Mesh(
new THREE.CircleGeometry( 25, 32, 0, Math.PI/2 ),
new THREE.MeshBasicMaterial({ color: 0xffffff, side: THREE.DoubleSide })
);
scene.add( circle );
However, if you want to extrude it instead of just displaying it as a plane, you can explore using THREE.ExtrudeGeometry. It's worth investigating whether this will suit your needs or not.
Here's a demonstration showcasing how to create an extruded shape, specifically a triangle along a straight line. This process aligns with the primary function of the Shape class. Check it out here
// Defining a 2D triangular shape
// The Shape() class facilitates the drawing of 2D shapes
var triangleShape = new THREE.Shape();
triangleShape.moveTo(-2, -2);
triangleShape.lineTo(0, 2);
triangleShape.lineTo(2, -2);
triangleShape.lineTo(-2, -2);
// Generating a new geometry by extruding the triangleShape
// 'amount' denotes the extrusion distance, 'bevelEnabled: false' disables beveling
var extrudedGeometry = new THREE.ExtrudeGeometry(triangleShape, { amount: 5, bevelEnabled: false });
// Utilizing a Mesh to give context to the geometry
var extrudedMesh = new THREE.Mesh(extrudedGeometry, new THREE.MeshPhongMaterial({ color: 0xff0000 }));
scene.add(extrudedMesh);
The essential points to grasp:
Dive deeper into THREE.js documentation for further insights:
Learn about Shape on THREE.js documentation
Explore ExtrudeGeometry in THREE.js documentation
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