150 lines
7.9 KiB
C++
150 lines
7.9 KiB
C++
/// @ref ext_matrix_projection
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/// @file glm/ext/matrix_projection.hpp
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///
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/// @defgroup ext_matrix_projection GLM_EXT_matrix_projection
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/// @ingroup ext
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///
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/// Functions that generate common projection transformation matrices.
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///
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/// The matrices generated by this extension use standard OpenGL fixed-function
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/// conventions. For example, the lookAt function generates a transform from world
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/// space into the specific eye space that the projective matrix functions
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/// (perspective, ortho, etc) are designed to expect. The OpenGL compatibility
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/// specifications defines the particular layout of this eye space.
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///
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/// Include <glm/ext/matrix_projection.hpp> to use the features of this extension.
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///
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/// @see ext_matrix_transform
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/// @see ext_matrix_clip_space
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#pragma once
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// Dependencies
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#include "../gtc/constants.hpp"
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#include "../geometric.hpp"
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#include "../trigonometric.hpp"
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#include "../matrix.hpp"
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#if GLM_MESSAGES == GLM_ENABLE && !defined(GLM_EXT_INCLUDED)
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# pragma message("GLM: GLM_EXT_matrix_projection extension included")
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#endif
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namespace glm
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{
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/// @addtogroup ext_matrix_projection
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/// @{
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/// Map the specified object coordinates (obj.x, obj.y, obj.z) into window coordinates.
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/// The near and far clip planes correspond to z normalized device coordinates of 0 and +1 respectively. (Direct3D clip volume definition)
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///
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/// @param obj Specify the object coordinates.
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/// @param model Specifies the current modelview matrix
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/// @param proj Specifies the current projection matrix
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/// @param viewport Specifies the current viewport
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/// @return Return the computed window coordinates.
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/// @tparam T Native type used for the computation. Currently supported: half (not recommended), float or double.
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/// @tparam U Currently supported: Floating-point types and integer types.
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///
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/// @see <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluProject.xml">gluProject man page</a>
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template<typename T, typename U, qualifier Q>
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GLM_FUNC_DECL vec<3, T, Q> projectZO(
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vec<3, T, Q> const& obj, mat<4, 4, T, Q> const& model, mat<4, 4, T, Q> const& proj, vec<4, U, Q> const& viewport);
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/// Map the specified object coordinates (obj.x, obj.y, obj.z) into window coordinates.
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/// The near and far clip planes correspond to z normalized device coordinates of -1 and +1 respectively. (OpenGL clip volume definition)
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///
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/// @param obj Specify the object coordinates.
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/// @param model Specifies the current modelview matrix
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/// @param proj Specifies the current projection matrix
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/// @param viewport Specifies the current viewport
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/// @return Return the computed window coordinates.
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/// @tparam T Native type used for the computation. Currently supported: half (not recommended), float or double.
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/// @tparam U Currently supported: Floating-point types and integer types.
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///
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/// @see <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluProject.xml">gluProject man page</a>
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template<typename T, typename U, qualifier Q>
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GLM_FUNC_DECL vec<3, T, Q> projectNO(
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vec<3, T, Q> const& obj, mat<4, 4, T, Q> const& model, mat<4, 4, T, Q> const& proj, vec<4, U, Q> const& viewport);
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/// Map the specified object coordinates (obj.x, obj.y, obj.z) into window coordinates using default near and far clip planes definition.
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/// To change default near and far clip planes definition use GLM_FORCE_DEPTH_ZERO_TO_ONE.
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///
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/// @param obj Specify the object coordinates.
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/// @param model Specifies the current modelview matrix
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/// @param proj Specifies the current projection matrix
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/// @param viewport Specifies the current viewport
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/// @return Return the computed window coordinates.
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/// @tparam T Native type used for the computation. Currently supported: half (not recommended), float or double.
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/// @tparam U Currently supported: Floating-point types and integer types.
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///
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/// @see <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluProject.xml">gluProject man page</a>
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template<typename T, typename U, qualifier Q>
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GLM_FUNC_DECL vec<3, T, Q> project(
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vec<3, T, Q> const& obj, mat<4, 4, T, Q> const& model, mat<4, 4, T, Q> const& proj, vec<4, U, Q> const& viewport);
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/// Map the specified window coordinates (win.x, win.y, win.z) into object coordinates.
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/// The near and far clip planes correspond to z normalized device coordinates of 0 and +1 respectively. (Direct3D clip volume definition)
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///
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/// @param win Specify the window coordinates to be mapped.
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/// @param model Specifies the modelview matrix
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/// @param proj Specifies the projection matrix
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/// @param viewport Specifies the viewport
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/// @return Returns the computed object coordinates.
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/// @tparam T Native type used for the computation. Currently supported: half (not recommended), float or double.
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/// @tparam U Currently supported: Floating-point types and integer types.
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///
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/// @see <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluUnProject.xml">gluUnProject man page</a>
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template<typename T, typename U, qualifier Q>
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GLM_FUNC_DECL vec<3, T, Q> unProjectZO(
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vec<3, T, Q> const& win, mat<4, 4, T, Q> const& model, mat<4, 4, T, Q> const& proj, vec<4, U, Q> const& viewport);
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/// Map the specified window coordinates (win.x, win.y, win.z) into object coordinates.
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/// The near and far clip planes correspond to z normalized device coordinates of -1 and +1 respectively. (OpenGL clip volume definition)
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///
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/// @param win Specify the window coordinates to be mapped.
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/// @param model Specifies the modelview matrix
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/// @param proj Specifies the projection matrix
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/// @param viewport Specifies the viewport
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/// @return Returns the computed object coordinates.
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/// @tparam T Native type used for the computation. Currently supported: half (not recommended), float or double.
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/// @tparam U Currently supported: Floating-point types and integer types.
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///
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/// @see <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluUnProject.xml">gluUnProject man page</a>
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template<typename T, typename U, qualifier Q>
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GLM_FUNC_DECL vec<3, T, Q> unProjectNO(
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vec<3, T, Q> const& win, mat<4, 4, T, Q> const& model, mat<4, 4, T, Q> const& proj, vec<4, U, Q> const& viewport);
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/// Map the specified window coordinates (win.x, win.y, win.z) into object coordinates using default near and far clip planes definition.
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/// To change default near and far clip planes definition use GLM_FORCE_DEPTH_ZERO_TO_ONE.
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///
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/// @param win Specify the window coordinates to be mapped.
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/// @param model Specifies the modelview matrix
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/// @param proj Specifies the projection matrix
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/// @param viewport Specifies the viewport
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/// @return Returns the computed object coordinates.
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/// @tparam T Native type used for the computation. Currently supported: half (not recommended), float or double.
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/// @tparam U Currently supported: Floating-point types and integer types.
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///
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/// @see <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluUnProject.xml">gluUnProject man page</a>
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template<typename T, typename U, qualifier Q>
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GLM_FUNC_DECL vec<3, T, Q> unProject(
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vec<3, T, Q> const& win, mat<4, 4, T, Q> const& model, mat<4, 4, T, Q> const& proj, vec<4, U, Q> const& viewport);
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/// Define a picking region
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///
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/// @param center Specify the center of a picking region in window coordinates.
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/// @param delta Specify the width and height, respectively, of the picking region in window coordinates.
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/// @param viewport Rendering viewport
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/// @tparam T Native type used for the computation. Currently supported: half (not recommended), float or double.
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/// @tparam U Currently supported: Floating-point types and integer types.
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///
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/// @see <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluPickMatrix.xml">gluPickMatrix man page</a>
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template<typename T, qualifier Q, typename U>
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GLM_FUNC_DECL mat<4, 4, T, Q> pickMatrix(
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vec<2, T, Q> const& center, vec<2, T, Q> const& delta, vec<4, U, Q> const& viewport);
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/// @}
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}//namespace glm
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#include "matrix_projection.inl"
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