three.js 画正多边形-线性
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1.正三角形
function initLine(){ geometry = new THREE.Geometry(); var material = new THREE.LineBasicMaterial({vertexColors:true}); var p1 = new THREE.Vector3(-5,0,0); var p2 = new THREE.Vector3(5,0,0); var p3 = new THREE.Vector3(0,Math.sqrt(75),0); var color1 = new THREE.Color(0x3385ff); var color2 = new THREE.Color(0x3385ff); var color3 = new THREE.Color(0x3385ff); geometry.vertices.push(p1,p2,p2,p3,p3,p1); geometry.colors.push(color1,color2,color3,color1,color1,color1); var triangle = new THREE.LineSegments(geometry,material,THREE.LinePieces); triangle.position.z = 2390; scene.add(triangle); }
页面显示(上图)
2.
正方形
function initLine(){ geometry = new THREE.Geometry(); var material = new THREE.LineBasicMaterial({vertexColors:true}); var p1 = new THREE.Vector3(-5,5,0); var p2 = new THREE.Vector3(5,5,0); var p3 = new THREE.Vector3(5,-5,0); var p4 = new THREE.Vector3(-5,-5,0); var color1 = new THREE.Color(0x3385ff); geometry.vertices.push(p1,p2,p2,p3,p3,p4,p4, p1); geometry.colors.push(color1,color1,color1,color1,color1,color1,color1,color1); var triangle = new THREE.LineSegments(geometry,material,THREE.LinePieces); triangle.position.z = 2390; scene.add(triangle); }
3.正六边形
代码
geometry = new THREE.Geometry(); var material = new THREE.LineBasicMaterial({vertexColors:true}); var p1 = new THREE.Vector3(5,0,0); var p2 = new THREE.Vector3(10,Math.sqrt(75),0); var p3 = new THREE.Vector3(5,2*Math.sqrt(75),0); var p4 = new THREE.Vector3(-5,2*Math.sqrt(75),0); var p5 = new THREE.Vector3(-10,Math.sqrt(75),0); var p6 = new THREE.Vector3(-5,0,0); var color1 = new THREE.Color(0x3385ff); geometry.vertices.push(p1,p2,p2,p3,p3,p4,p4,p5,p5,p6,p6,p6,p1,p6); geometry.colors.push(color1,color1,color1,color1,color1,color1,color1,color1,color1,color1,color1,color1,color1,color1,color1); var triangle = new THREE.LineSegments(geometry,material,THREE.LinePieces); triangle.position.z = 2390; scene.add(triangle);
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