Unity3d makes dynamic mesh and can be undulating with the ground

Applicable scenario: The protagonist with a halo, halo with a map, to be affixed to the ground, and with the ground bumps and downs

Code

Using unityengine;using System.Collections; [Requirecomponent (typeof (Meshfilter))] [Requirecomponent (typeof (Meshrenderer))]public class Test:monobehaviour {private Meshfilter mfilter;private Mesh mmesh;public int quadnum = 1;public float quadlength = 1;//Use this for initializationvoid Start () {mfilter = Gameobject . Getcomponent<meshfilter> (); Mmesh = new Mesh (); Mfilter.sharedmesh = Mmesh;mmesh.markdynamic (); var len = 2 * QuadNum * Quadlength;var H_len = quadnum * quadlength;var vertices = new Vector3[quadnum * 2 * quadnum * 2 * 4];var UV = new Vecto R2[quadnum * 2 * quadnum * 2 * 4];var triangle = new Int[quadnum * 2 * quadnum * 2 * 6];var offset = new Vector3 (-h_len, 0 ,-h_len); int idx = 0;for (int i = 0; i < Quadnum * 2; i++) {for (int j = 0; J < Quadnum * 2; + j) {var p0 = offset + New Vector3 (J * quadlength, 0, I * quadlength), var p1 = offset + new Vector3 (J * quadlength, 0, (i + 1) * quadlength); var P2 = offset + new Vector3 ((j + 1) * quadlength, 0, (i + 1) * quadlength)var p3 = offset + new Vector3 ((j + 1) * quadlength, 0, I * quadlength); int quad = (j + i * quadnum * 2) * 4;vertices[quad ] = P0;vertices[quad + 1] = P1;vertices[quad + 2] = P2;vertices[quad + 3] = P3;uv[quad] = new Vector2 ((p0.x + h_len)/len , (p0.z + h_len)/len), Uv[quad + 1] = new Vector2 ((p1.x + h_len)/len, (p1.z + h_len)/len); Uv[quad + 2] = new Vector2 ( (p2.x + h_len)/len, (p2.z + h_len)/len), Uv[quad + 3] = new Vector2 ((p3.x + h_len)/len, (p3.z + h_len)/len); Triangl e[idx++] = quad;triangle[idx++] = quad + 1;triangle[idx++] = quad + 2;triangle[idx++] = quad;triangle[idx++] = quad + 2;tr iangle[idx++] = quad + 3;}} mmesh.vertices = Vertices;mmesh.uv = Uv;mmesh.triangles = triangle; }//update is called once per frameprotected virtual void Update () {var len = 2 * Quadnum * Quadlength;var H_len = Quadnu M * quadlength;var vertices = new Vector3[quadnum * 2 * quadnum * 2 * 4];var offset = new Vector3 (-h_len, 0,-h_len); for ( int i = 0; I < Quadnum * 2; i++) {for (int j = 0; J < Quadnum * 2; J + +) {var p0 = offset + new Vector3 (J * quadlength, 0, I * quadlength), var p1 = offset + new Vector3 (J * quadlength, 0, (i + 1) * quadlength); var P2 = offset + new Vector3 ((j + 1) * quadlength, 0, (i + 1) * quadlength), var p3 = offset + new Vector3 ((j + 1) * QUADL  Ength, 0, I * quadlength); int quad = (j + i * quadnum * 2) * 4;vertices[quad] = P0;vertices[quad + 1] = P1;vertices[quad + 2] = P2;vertices[quad + 3] = p3;}}  var ray = new Ray (Vector3.down, Vector3.down), var hit = new Raycasthit (), for (int i = 0; i < Quadnum * 2; i++) {for (int j = 0; J < Quadnum * 2; J + +) {var p0 = offset + new Vector3 (J * quadlength, 0, I * quadlength), var p1 = offset + new Vector3 (J * quadlength, 0, (i + 1) * quadlength), var p2 = offset + new Vector3 ((j + 1) * quadlength, 0, (i + 1) * quadlength); var p3 = offset + new Vect Or3 ((j + 1) * quadlength, 0, I * quadlength); ray.origin = transform.localToWorldMatrix.MultiplyPoint3x4 (p0) +new Vector3 (0 , 10,0); if (Physics.raycast (ray,out hit, 100){p0 = transform.worldToLocalMatrix.MultiplyPoint3x4 (hit.point);} Ray.origin = transform.localToWorldMatrix.MultiplyPoint3x4 (p1) + new Vector3 (0, 0); if (Physics.raycast (Ray, out hit, ) {P1 = transform.worldToLocalMatrix.MultiplyPoint3x4 (hit.point);} Ray.origin = transform.localToWorldMatrix.MultiplyPoint3x4 (p2) + new Vector3 (0, 0); if (Physics.raycast (Ray, out hit, ) {P2 = transform.worldToLocalMatrix.MultiplyPoint3x4 (hit.point);} Ray.origin = transform.localToWorldMatrix.MultiplyPoint3x4 (p3) + new Vector3 (0, 0); if (Physics.raycast (Ray, out hit, ) {p3 = transform.worldToLocalMatrix.MultiplyPoint3x4 (hit.point);} int quad = (j + i * quadnum * 2) * 4;vertices[quad] = P0;vertices[quad + 1] = P1;vertices[quad + 2] = P2;vertices[quad + 3 ] = p3;}} Mmesh.vertices = vertices;}}

　　

Unity3d makes dynamic mesh and can be undulating with the ground