Method Material

src/lua/LuaOpenGL.cpp:1272–1333

int LuaOpenGL::Material(lua_State* L) {
  CheckDrawingEnabled(L, __FUNCTION__);

  const int args = lua_gettop(L);
  if ((args != 1) || !lua_istable(L, 1)) {
    luaL_error(L, "Incorrect arguments to gl.Material(table)");
  }

  fvec4 color;

  const int table = lua_gettop(L);
  for (lua_pushnil(L); lua_next(L, table) != 0; lua_pop(L, 1)) {
    if (!lua_israwstring(L, -2)) { // the key
      LuaLog(1, "gl.Material: bad state type");
      return 0;
    }
    const std::string key = lua_tostring(L, -2);

    if (key == "shininess") {
      if (lua_israwnumber(L, -1)) {
        const GLfloat specExp = (GLfloat)lua_tonumber(L, -1);
        glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, specExp);
      }
      continue;
    }

    const int count = ParseFloatArray(L, color, 4);
    if (count == 3) {
      color[3] = 1.0f;
    }

    if (key == "ambidiff") {
      if (count >= 3) {
        glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, color);
      }
    }
    else if (key == "ambient") {
      if (count >= 3) {
        glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, color);
      }
    }
    else if (key == "diffuse") {
      if (count >= 3) {
        glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, color);
      }
    }
    else if (key == "specular") {
      if (count >= 3) {
        glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, color);
      }
    }
    else if (key == "emission") {
      if (count >= 3) {
        glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, color);
      }
    }
    else {
      LuaLog(1, "gl.Material: unknown material type: %s", key.c_str());