코드로 큐브 만들어보기

<목차로 돌아가기>

 

참조 : 링크

 

 

using UnityEngine;
using System.Collections;
using System;

[RequireComponent(typeof(MeshFilter), typeof(MeshRenderer))]
public class TestCubeScripts : MonoBehaviour
{
	public int xSize, ySize, zSize;

	private Mesh mesh;
	private Vector3[] vertices;

	private void Awake() {
		Generate();
	}

	private void Generate() {
		CreateVertices(); //점 계산하여 추가하기.
		CreateTriangles();
	}

	private void CreateVertices() {
		GetComponent<MeshFilter>().mesh = mesh = new Mesh();
		mesh.name = "Procedural Cube";
		WaitForSeconds wait = new WaitForSeconds(0.05f);

		int cornerVertices = 8;
		int edgeVertices = (xSize + ySize + zSize - 3) * 4;
		int faceVertices = (
			(xSize - 1) * (ySize - 1) +
			(xSize - 1) * (zSize - 1) +
			(ySize - 1) * (zSize - 1)) * 2;
		vertices = new Vector3[cornerVertices + edgeVertices + faceVertices];

		int v = 0;

		for (int y = 0; y <= ySize; y++) {
			for (int x = 0; x <= xSize; x++) {
				vertices[v++] = new Vector3(x, y, 0);
			}
			for (int z = 1; z <= zSize; z++) {
				vertices[v++] = new Vector3(xSize, y, z);
			}
			for (int x = xSize - 1; x >= 0; x--) {
				vertices[v++] = new Vector3(x, y, zSize);
			}
			for (int z = zSize - 1; z > 0; z--) {
				vertices[v++] = new Vector3(0, y, z);
			}
		}

		for (int z = 1; z < zSize; z++) {
			for (int x = 1; x < xSize; x++) {
				vertices[v++] = new Vector3(x, ySize, z);
			}
		}
		for (int z = 1; z < zSize; z++) {
			for (int x = 1; x < xSize; x++) {
				vertices[v++] = new Vector3(x, 0, z);
			}
		}
		mesh.vertices = vertices;
	}

	private void CreateTriangles() {
		int quads = (xSize * ySize + xSize * zSize + ySize * zSize) * 2;
		int[] triangles = new int[quads * 6];
		int ring = (xSize + zSize) * 2;
		int t = 0, v = 0;

		for (int y = 0; y < ySize; y++, v++) { //높이(y)값에 따라서 반복해서 그림
			for (int q = 0; q < ring - 1; q++, v++) { // 둘레를 따라서 그려주기.
				t = SetQuad(triangles, t, v, v + 1, v + ring, v + ring + 1);
			}
			t = SetQuad(triangles, t, v, v - ring + 1, v + ring, v + 1); // 이게 삐죽 튀어나온 관계로 마지막 하나는 따로 그림
		}
		t = CreateTopFace(triangles, t, ring);
		t = CreateBottomFace(triangles, t, ring);
		mesh.triangles = triangles;
	}

    private int CreateTopFace(int[] triangles, int t, int ring) {
		int v = ring * ySize;
		for (int x = 0; x < xSize - 1; x++, v++) {
			t = SetQuad(triangles, t, v, v + 1, v + ring - 1, v + ring);
		}
		t = SetQuad(triangles, t, v, v + 1, v + ring - 1, v + 2);

		int vMin = ring * (ySize + 1) - 1;
		int vMid = vMin + 1;
		int vMax = v + 2;

		for (int z = 1; z < zSize - 1; z++, vMin--, vMid++, vMax++) {
			t = SetQuad(triangles, t, vMin, vMid, vMin - 1, vMid + xSize - 1);
			for (int x = 1; x < xSize - 1; x++, vMid++) {
				t = SetQuad(
					triangles, t,
					vMid, vMid + 1, vMid + xSize - 1, vMid + xSize);
			}
			t = SetQuad(triangles, t, vMid, vMax, vMid + xSize - 1, vMax + 1);
		}

		int vTop = vMin - 2;
		t = SetQuad(triangles, t, vMin, vMid, vTop + 1, vTop);
		for (int x = 1; x < xSize - 1; x++, vTop--, vMid++) {
			t = SetQuad(triangles, t, vMid, vMid + 1, vTop, vTop - 1);
		}
		t = SetQuad(triangles, t, vMid, vTop - 2, vTop, vTop - 1);
		return t;
	}
	private int CreateBottomFace(int[] triangles, int t, int ring) {
		int v = 1;
		int vMid = vertices.Length - (xSize - 1) * (zSize - 1);
		t = SetQuad(triangles, t, ring - 1, vMid, 0, 1);
		for (int x = 1; x < xSize - 1; x++, v++, vMid++) {
			t = SetQuad(triangles, t, vMid, vMid + 1, v, v + 1);
		}
		t = SetQuad(triangles, t, vMid, v + 2, v, v + 1);

		int vMin = ring - 2;
		vMid -= xSize - 2;
		int vMax = v + 2;

		for (int z = 1; z < zSize - 1; z++, vMin--, vMid++, vMax++) {
			t = SetQuad(triangles, t, vMin, vMid + xSize - 1, vMin + 1, vMid);
			for (int x = 1; x < xSize - 1; x++, vMid++) {
				t = SetQuad(
					triangles, t,
					vMid + xSize - 1, vMid + xSize, vMid, vMid + 1);
			}
			t = SetQuad(triangles, t, vMid + xSize - 1, vMax + 1, vMid, vMax);
		}

		int vTop = vMin - 1;
		t = SetQuad(triangles, t, vTop + 1, vTop, vTop + 2, vMid);
		for (int x = 1; x < xSize - 1; x++, vTop--, vMid++) {
			t = SetQuad(triangles, t, vTop, vTop - 1, vMid, vMid + 1);
		}
		t = SetQuad(triangles, t, vTop, vTop - 1, vMid, vTop - 2);

		return t;
	}
	private static int SetQuad(int[] triangles, int i, int v00, int v10, int v01, int v11) {
		triangles[i] = v00;
		triangles[i + 1] = triangles[i + 4] = v01;
		triangles[i + 2] = triangles[i + 3] = v10;
		triangles[i + 5] = v11;
		return i + 6;
	}

	private void OnDrawGizmos() {
		if (vertices == null) {
			return;
		}
		Gizmos.color = Color.black;
		for (int i = 0; i < vertices.Length; i++) {
			Gizmos.DrawSphere(vertices[i], 0.1f);
		}
	}
}

 

 

링크에 보면 둥긍둥글한 큐브 만드는 방법도 나오는데 나중을 기약..