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b3a18b8a15
This commit adds the RH/ZO perspective function. It does so in the new file `cam_rh_zo.h` and further refactors the LH variant into new file `cam_lh_zo.h`. This creates some churn in the tests and configuration files as new test files were added as well, and all these changes found their way into the build files. Tests passing on Linux.
59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
/*
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* Copyright (c), Recep Aslantas.
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*
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* MIT License (MIT), http://opensource.org/licenses/MIT
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* Full license can be found in the LICENSE file
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*/
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/*
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Functions:
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CGLM_INLINE void glm_perspective_rh_zo(float fovy,
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float aspect,
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float nearVal,
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float farVal,
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mat4 dest)
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*/
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#ifndef cglm_cam_rh_zo_h
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#define cglm_cam_rh_zo_h
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#include "common.h"
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#include "plane.h"
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/*!
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* @brief set up perspective projection matrix with a right-hand coordinate
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* system (suitable for Vulkan) and a clip-space with depth values from zero
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* to one.
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*
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* https://github.com/godlikepanos/anki-3d-engine/blob/317cb379ff3a7b09f9034f49c7bdab0f96a1c0b3/AnKi/Math/Mat.h#L1254
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*
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* @param[in] fovy field of view angle
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* @param[in] aspect aspect ratio ( width / height )
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* @param[in] nearVal near clipping plane
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* @param[in] farVal far clipping planes
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* @param[out] dest result matrix
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*/
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CGLM_INLINE
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void
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glm_perspective_rh_zo(float fovy,
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float aspect,
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float nearVal,
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float farVal,
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mat4 dest) {
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/* Impl follows glm::perspectiveRH_ZO in glm/ext/matrix_clip_space.inl */
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float fl, fn;
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glm_mat4_zero(dest);
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fl = 1.0f / tanf(fovy * 0.5f);
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fn = 1.0f / (farVal - nearVal);
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dest[0][0] = fl / aspect;
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dest[1][1] = fl;
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dest[2][2] = -farVal * fn;
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dest[2][3] = -1.0f;
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dest[3][2] = -farVal * nearVal * fn;
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}
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#endif /*cglm_cam_lh_zo_h*/
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