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两种常用材质的区别。",[1534,1535],"hr",{},[1525,1537,1539],{"id":1538},"物体的组成几何体-材质","🧱 物体的组成：几何体 + 材质",[1530,1541,1542],{},"Three.js 里一个看得见的物体（Mesh）永远由两部分组成：",[1544,1545,1546,1554],"ul",{},[1547,1548,1549,1553],"li",{},[1550,1551,1552],"strong",{},"几何体（Geometry）","：骨架，决定形状，是方是圆。",[1547,1555,1556,1559],{},[1550,1557,1558],{},"材质（Material）","：皮肤，决定外观，什么颜色、受不受灯光影响。",[1530,1561,1562],{},"打个比方：捏泥人时，几何体是你捏出的造型，材质是最后刷的那层釉。骨架不变，换层釉就从陶器变成瓷器。",[1564,1565,1570],"pre",{"className":1566,"code":1567,"language":1568,"meta":1569,"style":1569},"language-js shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","const geometry = new THREE.BoxGeometry(1, 1, 1); // 骨架：立方体\nconst material = new THREE.MeshBasicMaterial({ color: 0x44aa88 }); // 皮肤：绿色\nconst cube = new THREE.Mesh(geometry, material); // 组合成物体\n","js","",[1571,1572,1573,1630,1674],"code",{"__ignoreMap":1569},[1574,1575,1578,1582,1586,1590,1593,1596,1599,1603,1606,1610,1613,1616,1618,1620,1623,1626],"span",{"class":1576,"line":1577},"line",1,[1574,1579,1581],{"class":1580},"s50WR","const",[1574,1583,1585],{"class":1584},"sndM8"," geometry ",[1574,1587,1589],{"class":1588},"s86vT","=",[1574,1591,1592],{"class":1588}," new",[1574,1594,1595],{"class":1584}," THREE",[1574,1597,1598],{"class":1588},".",[1574,1600,1602],{"class":1601},"swgpB","BoxGeometry",[1574,1604,1605],{"class":1584},"(",[1574,1607,1609],{"class":1608},"smPcV","1",[1574,1611,1612],{"class":1588},",",[1574,1614,1615],{"class":1608}," 1",[1574,1617,1612],{"class":1588},[1574,1619,1615],{"class":1608},[1574,1621,1622],{"class":1584},")",[1574,1624,1625],{"class":1588},";",[1574,1627,1629],{"class":1628},"syuKq"," // 骨架：立方体\n",[1574,1631,1633,1635,1638,1640,1642,1644,1646,1649,1651,1654,1658,1661,1664,1667,1669,1671],{"class":1576,"line":1632},2,[1574,1634,1581],{"class":1580},[1574,1636,1637],{"class":1584}," material ",[1574,1639,1589],{"class":1588},[1574,1641,1592],{"class":1588},[1574,1643,1595],{"class":1584},[1574,1645,1598],{"class":1588},[1574,1647,1648],{"class":1601},"MeshBasicMaterial",[1574,1650,1605],{"class":1584},[1574,1652,1653],{"class":1588},"{",[1574,1655,1657],{"class":1656},"sd2Uz"," color",[1574,1659,1660],{"class":1588},":",[1574,1662,1663],{"class":1608}," 0x44aa88",[1574,1665,1666],{"class":1588}," }",[1574,1668,1622],{"class":1584},[1574,1670,1625],{"class":1588},[1574,1672,1673],{"class":1628}," // 皮肤：绿色\n",[1574,1675,1677,1679,1682,1684,1686,1688,1690,1693,1696,1698,1701,1703],{"class":1576,"line":1676},3,[1574,1678,1581],{"class":1580},[1574,1680,1681],{"class":1584}," cube 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THREE.SphereGeometry(0.7), material);\nconst cylinder = new THREE.Mesh(new THREE.CylinderGeometry(0.5, 0.5, 1.2), material);\nconst cone = new THREE.Mesh(new THREE.ConeGeometry(0.6, 1.2), material);\n",[1571,1793,1794,1843,1883,1933],{"__ignoreMap":1569},[1574,1795,1796,1798,1801,1803,1805,1807,1809,1811,1813,1816,1818,1820,1822,1824,1826,1828,1830,1832,1834,1836,1838,1840],{"class":1576,"line":1577},[1574,1797,1581],{"class":1580},[1574,1799,1800],{"class":1584}," box ",[1574,1802,1589],{"class":1588},[1574,1804,1592],{"class":1588},[1574,1806,1595],{"class":1584},[1574,1808,1598],{"class":1588},[1574,1810,1692],{"class":1601},[1574,1812,1605],{"class":1584},[1574,1814,1815],{"class":1588},"new",[1574,1817,1595],{"class":1584},[1574,1819,1598],{"class":1588},[1574,1821,1602],{"class":1601},[1574,1823,1605],{"class":1584},[1574,1825,1609],{"class":1608},[1574,1827,1612],{"class":1588},[1574,1829,1615],{"class":1608},[1574,1831,1612],{"class":1588},[1574,1833,1615],{"class":1608},[1574,1835,1622],{"class":1584},[1574,1837,1612],{"class":1588},[1574,1839,1700],{"class":1584},[1574,1841,1842],{"class":1588},";\n",[1574,1844,1845,1847,1850,1852,1854,1856,1858,1860,1862,1864,1866,1868,1870,1872,1875,1877,1879,1881],{"class":1576,"line":1632},[1574,1846,1581],{"class":1580},[1574,1848,1849],{"class":1584}," sphere ",[1574,1851,1589],{"class":1588},[1574,1853,1592],{"class":1588},[1574,1855,1595],{"class":1584},[1574,1857,1598],{"class":1588},[1574,1859,1692],{"class":1601},[1574,1861,1605],{"class":1584},[1574,1863,1815],{"class":1588},[1574,1865,1595],{"class":1584},[1574,1867,1598],{"class":1588},[1574,1869,1759],{"class":1601},[1574,1871,1605],{"class":1584},[1574,1873,1874],{"class":1608},"0.7",[1574,1876,1622],{"class":1584},[1574,1878,1612],{"class":1588},[1574,1880,1700],{"class":1584},[1574,1882,1842],{"class":1588},[1574,1884,1885,1887,1890,1892,1894,1896,1898,1900,1902,1904,1906,1908,1910,1912,1915,1917,1920,1922,1925,1927,1929,1931],{"class":1576,"line":1676},[1574,1886,1581],{"class":1580},[1574,1888,1889],{"class":1584}," cylinder ",[1574,1891,1589],{"class":1588},[1574,1893,1592],{"class":1588},[1574,1895,1595],{"class":1584},[1574,1897,1598],{"class":1588},[1574,1899,1692],{"class":1601},[1574,1901,1605],{"class":1584},[1574,1903,1815],{"class":1588},[1574,1905,1595],{"class":1584},[1574,1907,1598],{"class":1588},[1574,1909,1772],{"class":1601},[1574,1911,1605],{"class":1584},[1574,1913,1914],{"class":1608},"0.5",[1574,1916,1612],{"class":1588},[1574,1918,1919],{"class":1608}," 0.5",[1574,1921,1612],{"class":1588},[1574,1923,1924],{"class":1608}," 1.2",[1574,1926,1622],{"class":1584},[1574,1928,1612],{"class":1588},[1574,1930,1700],{"class":1584},[1574,1932,1842],{"class":1588},[1574,1934,1936,1938,1941,1943,1945,1947,1949,1951,1953,1955,1957,1959,1961,1963,1966,1968,1970,1972,1974,1976],{"class":1576,"line":1935},4,[1574,1937,1581],{"class":1580},[1574,1939,1940],{"class":1584}," cone ",[1574,1942,1589],{"class":1588},[1574,1944,1592],{"class":1588},[1574,1946,1595],{"class":1584},[1574,1948,1598],{"class":1588},[1574,1950,1692],{"class":1601},[1574,1952,1605],{"class":1584},[1574,1954,1815],{"class":1588},[1574,1956,1595],{"class":1584},[1574,1958,1598],{"class":1588},[1574,1960,1785],{"class":1601},[1574,1962,1605],{"class":1584},[1574,1964,1965],{"class":1608},"0.6",[1574,1967,1612],{"class":1588},[1574,1969,1924],{"class":1608},[1574,1971,1622],{"class":1584},[1574,1973,1612],{"class":1588},[1574,1975,1700],{"class":1584},[1574,1977,1842],{"class":1588},[1530,1979,1980,1981,1984],{},"把它们放进场景时，用 ",[1571,1982,1983],{},"position.x"," 排开位置，避免挤在一起：",[1564,1986,1988],{"className":1566,"code":1987,"language":1568,"meta":1569,"style":1569},"box.position.x = -3;\nsphere.position.x = -1;\ncylinder.position.x = 1;\ncone.position.x = 3;\n\nscene.add(box, sphere, cylinder, cone);\n",[1571,1989,1990,2015,2036,2055,2075,2082],{"__ignoreMap":1569},[1574,1991,1992,1995,1997,2000,2002,2005,2007,2010,2013],{"class":1576,"line":1577},[1574,1993,1994],{"class":1584},"box",[1574,1996,1598],{"class":1588},[1574,1998,1999],{"class":1584},"position",[1574,2001,1598],{"class":1588},[1574,2003,2004],{"class":1584},"x ",[1574,2006,1589],{"class":1588},[1574,2008,2009],{"class":1588}," -",[1574,2011,2012],{"class":1608},"3",[1574,2014,1842],{"class":1588},[1574,2016,2017,2020,2022,2024,2026,2028,2030,2032,2034],{"class":1576,"line":1632},[1574,2018,2019],{"class":1584},"sphere",[1574,2021,1598],{"class":1588},[1574,2023,1999],{"class":1584},[1574,2025,1598],{"class":1588},[1574,2027,2004],{"class":1584},[1574,2029,1589],{"class":1588},[1574,2031,2009],{"class":1588},[1574,2033,1609],{"class":1608},[1574,2035,1842],{"class":1588},[1574,2037,2038,2041,2043,2045,2047,2049,2051,2053],{"class":1576,"line":1676},[1574,2039,2040],{"class":1584},"cylinder",[1574,2042,1598],{"class":1588},[1574,2044,1999],{"class":1584},[1574,2046,1598],{"class":1588},[1574,2048,2004],{"class":1584},[1574,2050,1589],{"class":1588},[1574,2052,1615],{"class":1608},[1574,2054,1842],{"class":1588},[1574,2056,2057,2060,2062,2064,2066,2068,2070,2073],{"class":1576,"line":1935},[1574,2058,2059],{"class":1584},"cone",[1574,2061,1598],{"class":1588},[1574,2063,1999],{"class":1584},[1574,2065,1598],{"class":1588},[1574,2067,2004],{"class":1584},[1574,2069,1589],{"class":1588},[1574,2071,2072],{"class":1608}," 3",[1574,2074,1842],{"class":1588},[1574,2076,2078],{"class":1576,"line":2077},5,[1574,2079,2081],{"emptyLinePlaceholder":2080},true,"\n",[1574,2083,2085,2088,2090,2093,2096,2098,2101,2103,2106,2108,2111],{"class":1576,"line":2084},6,[1574,2086,2087],{"class":1584},"scene",[1574,2089,1598],{"class":1588},[1574,2091,2092],{"class":1601},"add",[1574,2094,2095],{"class":1584},"(box",[1574,2097,1612],{"class":1588},[1574,2099,2100],{"class":1584}," sphere",[1574,2102,1612],{"class":1588},[1574,2104,2105],{"class":1584}," cylinder",[1574,2107,1612],{"class":1588},[1574,2109,2110],{"class":1584}," cone)",[1574,2112,1842],{"class":1588},[1530,2114,2115,2116,2119],{},"下面是这 4 个几何体的",[1550,2117,2118],{},"真实渲染效果","（每个都转了个角度，方便看出立体感）：",[2121,2122],"three-geometry-demo",{},[2124,2125,2126],"tip",{},[1530,2127,2128,2129,2132],{},"球体、圆柱体还能传“分段数”参数控制表面光滑度，比如 ",[1571,2130,2131],{},"new THREE.SphereGeometry(0.7, 32, 16)","。分段越多球面越光滑，但渲染开销也越大。默认值在大多数场景已经够用，觉得球面有棱角时再调大。",[1534,2134],{},[1525,2136,2138],{"id":2137},"两种常用材质basic-和-standard","⚡ 两种常用材质：Basic 和 Standard",[1530,2140,2141],{},"几何体决定形状，材质决定质感。高频使用的材质是这两种：",[1544,2143,2144,2153],{},[1547,2145,2146,2148,2149,2152],{},[1550,2147,1648],{},"：基础材质，",[1550,2150,2151],{},"不受灯光影响","，每个面都显示为均匀的颜色，看起来是“平”的。",[1547,2154,2155,2158,2159,2162],{},[1550,2156,2157],{},"MeshStandardMaterial","：标准材质，",[1550,2160,2161],{},"会响应灯光","，朝向光的面亮、背光的面暗，有真实的明暗立体感。上一篇的立方体用的就是它。",[1530,2164,2165],{},"用同一个球体分别套用两种材质，代码只差一个类名：",[1564,2167,2169],{"className":1566,"code":2168,"language":1568,"meta":1569,"style":1569},"// 左边：基础材质，不需要灯光，但缺少立体感\nconst left = new THREE.Mesh(\n    new THREE.SphereGeometry(0.8),\n    new THREE.MeshBasicMaterial({ color: 0x6699ff })\n);\nleft.position.x = -1.5;\n\n// 右边：标准材质，必须配合灯光才能显出立体感\nconst right = new THREE.Mesh(\n    new THREE.SphereGeometry(0.8),\n    new THREE.MeshStandardMaterial({ color: 0x6699ff })\n);\nright.position.x = 1.5;\n\n// 标准材质需要光：环境光 + 平行光（下一篇详解）\nscene.add(new THREE.AmbientLight(0xffffff, 0.5));\nconst directionalLight = new THREE.DirectionalLight(0xffffff, 1.5);\ndirectionalLight.position.set(3, 5, 4);\nscene.add(directionalLight);\n\nscene.add(left, right);\n",[1571,2170,2171,2176,2196,2217,2243,2249,2271,2276,2282,2302,2321,2346,2353,2374,2379,2385,2419,2450,2483,2497,2502],{"__ignoreMap":1569},[1574,2172,2173],{"class":1576,"line":1577},[1574,2174,2175],{"class":1628},"// 左边：基础材质，不需要灯光，但缺少立体感\n",[1574,2177,2178,2180,2183,2185,2187,2189,2191,2193],{"class":1576,"line":1632},[1574,2179,1581],{"class":1580},[1574,2181,2182],{"class":1584}," left ",[1574,2184,1589],{"class":1588},[1574,2186,1592],{"class":1588},[1574,2188,1595],{"class":1584},[1574,2190,1598],{"class":1588},[1574,2192,1692],{"class":1601},[1574,2194,2195],{"class":1584},"(\n",[1574,2197,2198,2201,2203,2205,2207,2209,2212,2214],{"class":1576,"line":1676},[1574,2199,2200],{"class":1588},"    new",[1574,2202,1595],{"class":1584},[1574,2204,1598],{"class":1588},[1574,2206,1759],{"class":1601},[1574,2208,1605],{"class":1584},[1574,2210,2211],{"class":1608},"0.8",[1574,2213,1622],{"class":1584},[1574,2215,2216],{"class":1588},",\n",[1574,2218,2219,2221,2223,2225,2227,2229,2231,2233,2235,2238,2240],{"class":1576,"line":1935},[1574,2220,2200],{"class":1588},[1574,2222,1595],{"class":1584},[1574,2224,1598],{"class":1588},[1574,2226,1648],{"class":1601},[1574,2228,1605],{"class":1584},[1574,2230,1653],{"class":1588},[1574,2232,1657],{"class":1656},[1574,2234,1660],{"class":1588},[1574,2236,2237],{"class":1608}," 0x6699ff",[1574,2239,1666],{"class":1588},[1574,2241,2242],{"class":1584},")\n",[1574,2244,2245,2247],{"class":1576,"line":2077},[1574,2246,1622],{"class":1584},[1574,2248,1842],{"class":1588},[1574,2250,2251,2254,2256,2258,2260,2262,2264,2266,2269],{"class":1576,"line":2084},[1574,2252,2253],{"class":1584},"left",[1574,2255,1598],{"class":1588},[1574,2257,1999],{"class":1584},[1574,2259,1598],{"class":1588},[1574,2261,2004],{"class":1584},[1574,2263,1589],{"class":1588},[1574,2265,2009],{"class":1588},[1574,2267,2268],{"class":1608},"1.5",[1574,2270,1842],{"class":1588},[1574,2272,2274],{"class":1576,"line":2273},7,[1574,2275,2081],{"emptyLinePlaceholder":2080},[1574,2277,2279],{"class":1576,"line":2278},8,[1574,2280,2281],{"class":1628},"// 右边：标准材质，必须配合灯光才能显出立体感\n",[1574,2283,2285,2287,2290,2292,2294,2296,2298,2300],{"class":1576,"line":2284},9,[1574,2286,1581],{"class":1580},[1574,2288,2289],{"class":1584}," right ",[1574,2291,1589],{"class":1588},[1574,2293,1592],{"class":1588},[1574,2295,1595],{"class":1584},[1574,2297,1598],{"class":1588},[1574,2299,1692],{"class":1601},[1574,2301,2195],{"class":1584},[1574,2303,2305,2307,2309,2311,2313,2315,2317,2319],{"class":1576,"line":2304},10,[1574,2306,2200],{"class":1588},[1574,2308,1595],{"class":1584},[1574,2310,1598],{"class":1588},[1574,2312,1759],{"class":1601},[1574,2314,1605],{"class":1584},[1574,2316,2211],{"class":1608},[1574,2318,1622],{"class":1584},[1574,2320,2216],{"class":1588},[1574,2322,2324,2326,2328,2330,2332,2334,2336,2338,2340,2342,2344],{"class":1576,"line":2323},11,[1574,2325,2200],{"class":1588},[1574,2327,1595],{"class":1584},[1574,2329,1598],{"class":1588},[1574,2331,2157],{"class":1601},[1574,2333,1605],{"class":1584},[1574,2335,1653],{"class":1588},[1574,2337,1657],{"class":1656},[1574,2339,1660],{"class":1588},[1574,2341,2237],{"class":1608},[1574,2343,1666],{"class":1588},[1574,2345,2242],{"class":1584},[1574,2347,2349,2351],{"class":1576,"line":2348},12,[1574,2350,1622],{"class":1584},[1574,2352,1842],{"class":1588},[1574,2354,2356,2359,2361,2363,2365,2367,2369,2372],{"class":1576,"line":2355},13,[1574,2357,2358],{"class":1584},"right",[1574,2360,1598],{"class":1588},[1574,2362,1999],{"class":1584},[1574,2364,1598],{"class":1588},[1574,2366,2004],{"class":1584},[1574,2368,1589],{"class":1588},[1574,2370,2371],{"class":1608}," 1.5",[1574,2373,1842],{"class":1588},[1574,2375,2377],{"class":1576,"line":2376},14,[1574,2378,2081],{"emptyLinePlaceholder":2080},[1574,2380,2382],{"class":1576,"line":2381},15,[1574,2383,2384],{"class":1628},"// 标准材质需要光：环境光 + 平行光（下一篇详解）\n",[1574,2386,2388,2390,2392,2394,2396,2398,2400,2402,2405,2407,2410,2412,2414,2417],{"class":1576,"line":2387},16,[1574,2389,2087],{"class":1584},[1574,2391,1598],{"class":1588},[1574,2393,2092],{"class":1601},[1574,2395,1605],{"class":1584},[1574,2397,1815],{"class":1588},[1574,2399,1595],{"class":1584},[1574,2401,1598],{"class":1588},[1574,2403,2404],{"class":1601},"AmbientLight",[1574,2406,1605],{"class":1584},[1574,2408,2409],{"class":1608},"0xffffff",[1574,2411,1612],{"class":1588},[1574,2413,1919],{"class":1608},[1574,2415,2416],{"class":1584},"))",[1574,2418,1842],{"class":1588},[1574,2420,2422,2424,2427,2429,2431,2433,2435,2438,2440,2442,2444,2446,2448],{"class":1576,"line":2421},17,[1574,2423,1581],{"class":1580},[1574,2425,2426],{"class":1584}," directionalLight ",[1574,2428,1589],{"class":1588},[1574,2430,1592],{"class":1588},[1574,2432,1595],{"class":1584},[1574,2434,1598],{"class":1588},[1574,2436,2437],{"class":1601},"DirectionalLight",[1574,2439,1605],{"class":1584},[1574,2441,2409],{"class":1608},[1574,2443,1612],{"class":1588},[1574,2445,2371],{"class":1608},[1574,2447,1622],{"class":1584},[1574,2449,1842],{"class":1588},[1574,2451,2453,2456,2458,2460,2462,2465,2467,2469,2471,2474,2476,2479,2481],{"class":1576,"line":2452},18,[1574,2454,2455],{"class":1584},"directionalLight",[1574,2457,1598],{"class":1588},[1574,2459,1999],{"class":1584},[1574,2461,1598],{"class":1588},[1574,2463,2464],{"class":1601},"set",[1574,2466,1605],{"class":1584},[1574,2468,2012],{"class":1608},[1574,2470,1612],{"class":1588},[1574,2472,2473],{"class":1608}," 5",[1574,2475,1612],{"class":1588},[1574,2477,2478],{"class":1608}," 4",[1574,2480,1622],{"class":1584},[1574,2482,1842],{"class":1588},[1574,2484,2486,2488,2490,2492,2495],{"class":1576,"line":2485},19,[1574,2487,2087],{"class":1584},[1574,2489,1598],{"class":1588},[1574,2491,2092],{"class":1601},[1574,2493,2494],{"class":1584},"(directionalLight)",[1574,2496,1842],{"class":1588},[1574,2498,2500],{"class":1576,"line":2499},20,[1574,2501,2081],{"emptyLinePlaceholder":2080},[1574,2503,2505,2507,2509,2511,2514,2516,2519],{"class":1576,"line":2504},21,[1574,2506,2087],{"class":1584},[1574,2508,1598],{"class":1588},[1574,2510,2092],{"class":1601},[1574,2512,2513],{"class":1584},"(left",[1574,2515,1612],{"class":1588},[1574,2517,2518],{"class":1584}," right)",[1574,2520,1842],{"class":1588},[1530,2522,2523,2524,2527],{},"下面是两种材质的",[1550,2525,2526],{},"真实渲染对比","。注意左边 Basic 材质像一张扁平的圆形贴纸，右边 Standard 材质有明暗过渡，一眼就能看出是球：",[2529,2530],"three-material-demo",{},[2532,2533,2534],"warning",{},[1530,2535,2536,2537,2539],{},"用了 ",[1571,2538,2157],{}," 却不加灯光，物体会黑乎乎一片甚至完全看不见。这不是 bug，是它“靠光才能显形”的特性。灯光的详细用法下一篇专门讲。",[1534,2541],{},[1525,2543,2545],{"id":2544},"调试利器线框模式","💡 调试利器：线框模式",[1530,2547,2548,2549,2552,2553,2556],{},"所有材质都有一个 ",[1571,2550,2551],{},"wireframe"," 属性，设为 ",[1571,2554,2555],{},"true"," 后物体只显示骨架线框：",[1564,2558,2560],{"className":1566,"code":2559,"language":1568,"meta":1569,"style":1569},"const material = new THREE.MeshBasicMaterial({\n    color: 0x44aa88,\n    wireframe: true,\n});\n",[1571,2561,2562,2583,2594,2607],{"__ignoreMap":1569},[1574,2563,2564,2566,2568,2570,2572,2574,2576,2578,2580],{"class":1576,"line":1577},[1574,2565,1581],{"class":1580},[1574,2567,1637],{"class":1584},[1574,2569,1589],{"class":1588},[1574,2571,1592],{"class":1588},[1574,2573,1595],{"class":1584},[1574,2575,1598],{"class":1588},[1574,2577,1648],{"class":1601},[1574,2579,1605],{"class":1584},[1574,2581,2582],{"class":1588},"{\n",[1574,2584,2585,2588,2590,2592],{"class":1576,"line":1632},[1574,2586,2587],{"class":1656},"    color",[1574,2589,1660],{"class":1588},[1574,2591,1663],{"class":1608},[1574,2593,2216],{"class":1588},[1574,2595,2596,2599,2601,2605],{"class":1576,"line":1676},[1574,2597,2598],{"class":1656},"    wireframe",[1574,2600,1660],{"class":1588},[1574,2602,2604],{"class":2603},"sPKOg"," true",[1574,2606,2216],{"class":1588},[1574,2608,2609,2612,2614],{"class":1576,"line":1935},[1574,2610,2611],{"class":1588},"}",[1574,2613,1622],{"class":1584},[1574,2615,1842],{"class":1588},[1530,2617,2618],{},"线框模式能清楚看到几何体由一个个三角形拼成，排查形状问题时非常好用。开发阶段打开看看，上线前记得关。",[1534,2620],{},[1525,2622,2624],{"id":2623},"小节总结","🧾 小节总结",[1544,2626,2627,2630,2643,2648,2653],{},[1547,2628,2629],{},"物体（Mesh）= 几何体（骨架形状）+ 材质（皮肤外观）。",[1547,2631,2632,2633,2635,2636,2635,2638,2635,2640,2642],{},"常用几何体：",[1571,2634,1602],{},"、",[1571,2637,1759],{},[1571,2639,1772],{},[1571,2641,1785],{},"。",[1547,2644,2645,2647],{},[1571,2646,1648],{}," 不受灯光影响，颜色均匀但缺少立体感。",[1547,2649,2650,2652],{},[1571,2651,2157],{}," 响应灯光、有明暗变化，必须配合灯光使用。",[1547,2654,2655,2658],{},[1571,2656,2657],{},"wireframe: true"," 只画骨架线框，是调试形状的好帮手。",[1534,2660],{},[1525,2662,2664],{"id":2663},"知识问答","❓ 知识问答",[1530,2666,2667],{},[1550,2668,2669],{},"Q1：几何体的分段数（segments）是什么？",[1530,2671,2672],{},"球、圆柱这类曲面几何体，实际是用很多小三角形拼出来的。分段数就是“拼多少块”，越多越圆滑、越耗性能。日常用默认值即可。",[1530,2674,2675],{},[1550,2676,2677],{},"Q2：材质除了颜色还能设置什么，比如贴图片？",[1530,2679,2680,2681,2684,2685,2688],{},"可以，这叫“纹理贴图”，通过 ",[1571,2682,2683],{},"TextureLoader"," 加载图片后赋给材质的 ",[1571,2686,2687],{},"map"," 属性。贴图属于进阶内容，掌握本课两种材质后再学很快。",[1530,2690,2691],{},[1550,2692,2693],{},"Q3：一个几何体能配多个材质吗？",[1530,2695,2696,2697,2699],{},"可以。给 ",[1571,2698,1692],{}," 传材质数组，能让物体的不同面用不同材质，立方体的 6 个面各配一种颜色就是经典玩法。日常开发用得不多，了解即可。",[1530,2701,2702],{},[1550,2703,2704],{},"Q4：Basic 材质既然没有立体感，还有什么用？",[1530,2706,2707],{},"它开销小、渲染快，适合不需要光影的场景：纯色背景板、2D 风格的图形、调试用的占位物体等。",[1534,2709],{},[1525,2711,2713],{"id":2712},"小练习","🧪 小练习",[1530,2715,2716],{},"搭建一个“几何体小展台”：",[2718,2719,2720,2723,2729],"ol",{},[1547,2721,2722],{},"在场景里并排放入球体、圆柱体、圆锥体三个物体。",[1547,2724,2725,2726,2728],{},"统一使用 ",[1571,2727,2157],{},"，颜色自选，并添加环境光和平行光。",[1547,2730,2731,2732,2734,2735,2737],{},"把其中一个材质的 ",[1571,2733,2551],{}," 设为 ",[1571,2736,2555],{},"，对比线框和实心的效果。",[1564,2739,2744],{"className":2740,"code":2741,"filename":2742,"language":2743,"meta":1569,"style":1569},"language-vue shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","\u003Ctemplate>\n    \u003Cdiv ref=\"containerRef\" class=\"container\">\u003C/div>\n\u003C/template>\n\n\u003Cscript setup>\nimport { onMounted, ref } from 'vue';\nimport * as THREE from 'three';\n\nconst containerRef = ref(null);\n\nonMounted(() => {\n    const scene = new THREE.Scene();\n    const camera = new THREE.PerspectiveCamera(75, 440 / 240, 0.1, 1000);\n    camera.position.z = 5;\n\n    // 请在这里编写代码\n\n    const renderer = new THREE.WebGLRenderer({ antialias: true 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