52 lines
1.9 KiB
C++
52 lines
1.9 KiB
C++
// Copyright(c) 2019, NVIDIA CORPORATION. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// ignore warning 4127: conditional expression is constant
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#if defined( _MSC_VER )
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# pragma warning( disable : 4127 )
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#elif defined( __GNUC__ )
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// don't know how to switch off that warning here
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#else
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// unknow compiler... just ignore the warnings for yourselves ;)
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#endif
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#include "math.hpp"
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namespace vk
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{
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namespace su
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{
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glm::mat4x4 createModelViewProjectionClipMatrix( vk::Extent2D const & extent )
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{
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float fov = glm::radians( 45.0f );
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if ( extent.width > extent.height )
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{
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fov *= static_cast<float>( extent.height ) / static_cast<float>( extent.width );
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}
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glm::mat4x4 model = glm::mat4x4( 1.0f );
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glm::mat4x4 view = glm::lookAt( glm::vec3( -5.0f, 3.0f, -10.0f ), glm::vec3( 0.0f, 0.0f, 0.0f ), glm::vec3( 0.0f, -1.0f, 0.0f ) );
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glm::mat4x4 projection = glm::perspective( fov, 1.0f, 0.1f, 100.0f );
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// clang-format off
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glm::mat4x4 clip = glm::mat4x4( 1.0f, 0.0f, 0.0f, 0.0f,
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0.0f, -1.0f, 0.0f, 0.0f,
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0.0f, 0.0f, 0.5f, 0.0f,
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0.0f, 0.0f, 0.5f, 1.0f ); // vulkan clip space has inverted y and half z !
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// clang-format on
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return clip * projection * view * model;
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}
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} // namespace su
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} // namespace vk
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