Three.js地图导航

最终效果

关键代码

...
//map摄像机
cameraMap = new THREE.PerspectiveCamera(75,width/height,0.1,20000);
cameraMap.position.set(0,10,0); //copy( camera.position ) 或者复制主摄像机的位置
cameraMap.lookAt(0,0,0);

...
function onWindowResize(){
    
    
	...
	insetWidth = window.innerHeight / 5; 
	insetHeight = window.innerHeight / 5;

	cameraMap.aspect = insetWidth / insetHeight;
	cameraMap.updateProjectionMatrix();

}

function animation(){
    
    
	...
	// main scene
	renderer.setClearColor( 0x000000, 1 );
	renderer.setViewport( 0, 0, window.innerWidth, window.innerHeight );
	renderer.render( scene, camera );

	// inset scene
	renderer.setClearColor( 0x222222, 0.1 );
	renderer.clearDepth(); // important!
	renderer.setScissorTest( true );
	renderer.setScissor( 20, 20, insetWidth, insetHeight );
	renderer.setViewport( 20, 20, insetWidth, insetHeight );
	//camera2.position.copy( camera.position );
	//camera2.quaternion.copy( camera.quaternion );
	// renderer will set this eventually
	renderer.render( scene, cameraMap);
	renderer.setScissorTest( false );
	...
}

地图视角图标

待续