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158 lines
5.2 KiB
158 lines
5.2 KiB
/////////////////////////////////////////////////////////////////////////////////// |
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/// OpenGL Mathematics (glm.g-truc.net) |
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/// |
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/// Copyright (c) 2005 - 2011 G-Truc Creation (www.g-truc.net) |
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/// Permission is hereby granted, free of charge, to any person obtaining a copy |
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/// of this software and associated documentation files (the "Software"), to deal |
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/// in the Software without restriction, including without limitation the rights |
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/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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/// copies of the Software, and to permit persons to whom the Software is |
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/// furnished to do so, subject to the following conditions: |
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/// |
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/// The above copyright notice and this permission notice shall be included in |
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/// all copies or substantial portions of the Software. |
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/// |
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/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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/// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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/// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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/// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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/// THE SOFTWARE. |
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/// |
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/// @ref core |
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/// @file glm/core/func_packing.inl |
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/// @date 2010-03-17 / 2011-06-15 |
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/// @author Christophe Riccio |
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/////////////////////////////////////////////////////////////////////////////////// |
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namespace glm{ |
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GLM_FUNC_QUALIFIER detail::uint32 packUnorm2x16(detail::tvec2<detail::float32> const & v) |
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{ |
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detail::uint16 A(detail::uint16(round(clamp(v.x, 0.0f, 1.0f) * 65535.0f))); |
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detail::uint16 B(detail::uint16(round(clamp(v.y, 0.0f, 1.0f) * 65535.0f))); |
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return detail::uint32((B << 16) | A); |
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} |
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GLM_FUNC_QUALIFIER detail::tvec2<detail::float32> unpackUnorm2x16(detail::uint32 const & p) |
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{ |
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detail::uint32 Mask16((1 << 16) - 1); |
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detail::uint32 A((p >> 0) & Mask16); |
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detail::uint32 B((p >> 16) & Mask16); |
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return detail::tvec2<detail::float32>( |
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A * 1.0f / 65535.0f, |
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B * 1.0f / 65535.0f); |
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} |
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GLM_FUNC_QUALIFIER detail::uint32 packSnorm2x16(detail::tvec2<detail::float32> const & v) |
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{ |
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union iu |
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{ |
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detail::int16 i; |
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detail::uint16 u; |
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} A, B; |
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detail::tvec2<detail::float32> Unpack = clamp(v ,-1.0f, 1.0f) * 32767.0f; |
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A.i = detail::int16(round(Unpack.x)); |
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B.i = detail::int16(round(Unpack.y)); |
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detail::uint32 Pack = (detail::uint32(B.u) << 16) | (detail::uint32(A.u) << 0); |
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return Pack; |
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} |
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GLM_FUNC_QUALIFIER detail::tvec2<detail::float32> unpackSnorm2x16(detail::uint32 const & p) |
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{ |
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union iu |
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{ |
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detail::int16 i; |
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detail::uint16 u; |
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} A, B; |
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detail::uint32 Mask16((1 << 16) - 1); |
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A.u = detail::uint16((p >> 0) & Mask16); |
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B.u = detail::uint16((p >> 16) & Mask16); |
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vec2 Pack(A.i, B.i); |
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return clamp(Pack * 1.0f / 32767.0f, -1.0f, 1.0f); |
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} |
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GLM_FUNC_QUALIFIER detail::uint32 packUnorm4x8(detail::tvec4<detail::float32> const & v) |
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{ |
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detail::uint8 A((detail::uint8)round(clamp(v.x, 0.0f, 1.0f) * 255.0f)); |
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detail::uint8 B((detail::uint8)round(clamp(v.y, 0.0f, 1.0f) * 255.0f)); |
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detail::uint8 C((detail::uint8)round(clamp(v.z, 0.0f, 1.0f) * 255.0f)); |
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detail::uint8 D((detail::uint8)round(clamp(v.w, 0.0f, 1.0f) * 255.0f)); |
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return detail::uint32((D << 24) | (C << 16) | (B << 8) | A); |
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} |
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GLM_FUNC_QUALIFIER detail::tvec4<detail::float32> unpackUnorm4x8(detail::uint32 const & p) |
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{ |
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detail::uint8 A(detail::uint8(p >> 0)); |
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detail::uint8 B(detail::uint8(p >> 8)); |
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detail::uint8 C(detail::uint8(p >> 16)); |
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detail::uint8 D(detail::uint8(p >> 24)); |
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return detail::tvec4<detail::float32>( |
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A * 1.0f / 255.0f, |
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B * 1.0f / 255.0f, |
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C * 1.0f / 255.0f, |
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D * 1.0f / 255.0f); |
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} |
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GLM_FUNC_QUALIFIER detail::uint32 packSnorm4x8(detail::tvec4<detail::float32> const & v) |
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{ |
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union iu |
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{ |
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detail::int8 i; |
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detail::uint8 u; |
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} A, B, C, D; |
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detail::tvec4<detail::float32> Unpack = clamp(v ,-1.0f, 1.0f) * 127.0f; |
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A.i = detail::int8(round(Unpack.x)); |
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B.i = detail::int8(round(Unpack.y)); |
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C.i = detail::int8(round(Unpack.z)); |
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D.i = detail::int8(round(Unpack.w)); |
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detail::uint32 Pack = (detail::uint32(D.u) << 24) | (detail::uint32(C.u) << 16) | (detail::uint32(B.u) << 8) | (detail::uint32(A.u) << 0); |
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return Pack; |
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} |
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GLM_FUNC_QUALIFIER detail::tvec4<detail::float32> unpackSnorm4x8(detail::uint32 const & p) |
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{ |
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union iu |
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{ |
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detail::int8 i; |
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detail::uint8 u; |
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} A, B, C, D; |
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detail::uint32 Mask8((1 << 8) - 1); |
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A.u = detail::uint8((p >> 0) & Mask8); |
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B.u = detail::uint8((p >> 8) & Mask8); |
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C.u = detail::uint8((p >> 16) & Mask8); |
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D.u = detail::uint8((p >> 24) & Mask8); |
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vec4 Pack(A.i, B.i, C.i, D.i); |
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return clamp(Pack, -1.0f, 1.0f); |
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} |
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GLM_FUNC_QUALIFIER double packDouble2x32(detail::tvec2<detail::uint32> const & v) |
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{ |
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return *(double*)&v; |
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} |
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GLM_FUNC_QUALIFIER detail::tvec2<uint> unpackDouble2x32(double const & v) |
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{ |
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return *(detail::tvec2<uint>*)&v; |
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} |
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GLM_FUNC_QUALIFIER uint packHalf2x16(vec2 const & v) |
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{ |
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detail::tvec2<detail::hdata> Pack(detail::toFloat16(v.x), detail::toFloat16(v.y)); |
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return *(uint*)&Pack; |
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} |
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GLM_FUNC_QUALIFIER vec2 unpackHalf2x16(uint const & v) |
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{ |
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detail::tvec2<detail::hdata> Unpack = *(detail::tvec2<detail::hdata>*)&v; |
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return vec2(detail::toFloat32(Unpack.x), detail::toFloat32(Unpack.y)); |
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} |
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}//namespace glm
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