| /************************************************************** |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| *************************************************************/ |
| |
| |
| |
| #ifndef _BGFX_TOOLS_LERP_HXX |
| #define _BGFX_TOOLS_LERP_HXX |
| |
| #include <sal/types.h> |
| |
| namespace basegfx |
| { |
| namespace tools |
| { |
| /** Generic linear interpolator |
| |
| @tpl ValueType |
| Must have operator+ and operator* defined, and should |
| have value semantics. |
| |
| @param t |
| As usual, t must be in the [0,1] range |
| */ |
| template< typename ValueType > ValueType lerp( const ValueType& rFrom, |
| const ValueType& rTo, |
| double t ) |
| { |
| // This is only to suppress a double->int warning. All other |
| // types should be okay here. |
| return static_cast<ValueType>( (1.0-t)*rFrom + t*rTo ); |
| } |
| } |
| } |
| |
| #endif /* _BGFX_TOOLS_LERP_HXX */ |
