Three.js BufferGeometry

BufferGeometry是Three.js最基本的几何体。

所有的几何体都继承于BufferGeometry。

BufferGeometry的使用。

// Scene
const scene = new THREE.Scene()

const geometry = new THREE.BufferGeometry();

// create a simple square shape. We duplicate the top left and bottom right
// vertices because each vertex needs to appear once per triangle.
const vertices = new Float32Array( [
	-1.0, -1.0,  1.0, // v0
	 1.0, -1.0,  1.0, // v1
	 1.0,  1.0,  1.0, // v2

	 1.0,  1.0,  1.0, // v3
	-1.0,  1.0,  1.0, // v4
	-1.0, -1.0,  1.0  // v5

	
] );

// itemSize = 3 because there are 3 values (components) per vertex
geometry.setAttribute( 'position', new THREE.BufferAttribute( vertices, 3 ) );
const material = new THREE.MeshBasicMaterial( { color: 0xff0000 } );
const mesh = new THREE.Mesh( geometry, material );
scene.add( mesh );

显示效果：