示例#1
0
        private static GameObject CreateCylinderCollider()
        {
            GameObject gameObject = new GameObject("Cylinder");
            MeshFilter meshFilter = gameObject.AddComponent <MeshFilter>();

            Link.Geometry.Cylinder cylinder = new Link.Geometry.Cylinder(0.5, 2); //Default unity cylinder sizes

            meshFilter.sharedMesh = CreateCylinderMesh(cylinder);
            ConvertCylinderToCollider(meshFilter);

            return(gameObject);
        }
示例#2
0
        public static Mesh CreateCylinderMesh(Link.Geometry.Cylinder cylinder)
        {
            float height       = (float)cylinder.length;
            float bottomRadius = (float)cylinder.radius;
            float topRadius    = (float)cylinder.radius;
            int   nbSides      = 30;
            int   nbHeightSeg  = 30;

            int nbVerticesCap = nbSides + 1;

            #region Vertices

            // bottom + top + sides
            Vector3[] vertices = new Vector3[nbVerticesCap + nbVerticesCap + nbSides * nbHeightSeg * 2 + 2];
            int       vert     = 0;
            float     _2pi     = Mathf.PI * 2f;

            // Bottom cap
            float top    = 0.5f * height;
            float bottom = -0.5f * height;
            vertices[vert++] = new Vector3(0f, bottom, 0f);
            while (vert <= nbSides)
            {
                float rad = (float)vert / nbSides * _2pi;
                vertices[vert] = new Vector3(Mathf.Cos(rad) * bottomRadius, bottom, Mathf.Sin(rad) * bottomRadius);
                vert++;
            }

            // Top cap
            vertices[vert++] = new Vector3(0f, top, 0f);
            while (vert <= nbSides * 2 + 1)
            {
                float rad = (float)(vert - nbSides - 1) / nbSides * _2pi;
                vertices[vert] = new Vector3(Mathf.Cos(rad) * topRadius, top, Mathf.Sin(rad) * topRadius);
                vert++;
            }

            // Sides
            int v = 0;
            while (vert <= vertices.Length - 4)
            {
                float rad = (float)v / nbSides * _2pi;
                vertices[vert]     = new Vector3(Mathf.Cos(rad) * topRadius, top, Mathf.Sin(rad) * topRadius);
                vertices[vert + 1] = new Vector3(Mathf.Cos(rad) * bottomRadius, bottom, Mathf.Sin(rad) * bottomRadius);
                vert += 2;
                v++;
            }
            vertices[vert]     = vertices[nbSides * 2 + 2];
            vertices[vert + 1] = vertices[nbSides * 2 + 3];
            #endregion

            #region Normales

            // bottom + top + sides
            Vector3[] normales = new Vector3[vertices.Length];
            vert = 0;

            // Bottom cap
            while (vert <= nbSides)
            {
                normales[vert++] = Vector3.down;
            }

            // Top cap
            while (vert <= nbSides * 2 + 1)
            {
                normales[vert++] = Vector3.up;
            }

            // Sides
            v = 0;
            while (vert <= vertices.Length - 4)
            {
                float rad = (float)v / nbSides * _2pi;
                float cos = Mathf.Cos(rad);
                float sin = Mathf.Sin(rad);

                normales[vert]     = new Vector3(cos, 0f, sin);
                normales[vert + 1] = normales[vert];

                vert += 2;
                v++;
            }
            normales[vert]     = normales[nbSides * 2 + 2];
            normales[vert + 1] = normales[nbSides * 2 + 3];
            #endregion

            #region UVs
            Vector2[] uvs = new Vector2[vertices.Length];

            // Bottom cap
            int u = 0;
            uvs[u++] = new Vector2(0.5f, 0.5f);
            while (u <= nbSides)
            {
                float rad = (float)u / nbSides * _2pi;
                uvs[u] = new Vector2(Mathf.Cos(rad) * .5f + .5f, Mathf.Sin(rad) * .5f + .5f);
                u++;
            }

            // Top cap
            uvs[u++] = new Vector2(0.5f, 0.5f);
            while (u <= nbSides * 2 + 1)
            {
                float rad = (float)u / nbSides * _2pi;
                uvs[u] = new Vector2(Mathf.Cos(rad) * .5f + .5f, Mathf.Sin(rad) * .5f + .5f);
                u++;
            }

            // Sides
            int u_sides = 0;
            while (u <= uvs.Length - 4)
            {
                float t = (float)u_sides / nbSides;
                uvs[u]     = new Vector3(t, 1f);
                uvs[u + 1] = new Vector3(t, 0f);
                u         += 2;
                u_sides++;
            }
            uvs[u]     = new Vector2(1f, 1f);
            uvs[u + 1] = new Vector2(1f, 0f);
            #endregion

            #region Triangles
            int   nbTriangles = nbSides + nbSides + nbSides * 2;
            int[] triangles   = new int[nbTriangles * 3 + 3];

            // Bottom cap
            int tri = 0;
            int i   = 0;
            while (tri < nbSides - 1)
            {
                triangles[i]     = 0;
                triangles[i + 1] = tri + 1;
                triangles[i + 2] = tri + 2;
                tri++;
                i += 3;
            }
            triangles[i]     = 0;
            triangles[i + 1] = tri + 1;
            triangles[i + 2] = 1;
            tri++;
            i += 3;

            // Top cap
            //tri++;
            while (tri < nbSides * 2)
            {
                triangles[i]     = tri + 2;
                triangles[i + 1] = tri + 1;
                triangles[i + 2] = nbVerticesCap;
                tri++;
                i += 3;
            }

            triangles[i]     = nbVerticesCap + 1;
            triangles[i + 1] = tri + 1;
            triangles[i + 2] = nbVerticesCap;
            tri++;
            i += 3;
            tri++;

            // Sides
            while (tri <= nbTriangles)
            {
                triangles[i]     = tri + 2;
                triangles[i + 1] = tri + 1;
                triangles[i + 2] = tri + 0;
                tri++;
                i += 3;

                triangles[i]     = tri + 1;
                triangles[i + 1] = tri + 2;
                triangles[i + 2] = tri + 0;
                tri++;
                i += 3;
            }
            #endregion

            Mesh mesh = new Mesh
            {
                vertices  = vertices,
                normals   = normales,
                uv        = uvs,
                triangles = triangles
            };

            mesh.RecalculateBounds();
            return(mesh);
        }