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use right handed projection matrix from https://github.com/PacktPublishing/Vulkan-Cookbook/

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Jean-Philippe Bruyère 2018-05-26 18:04:43 +02:00
parent 024e94b6c4
commit fa1045daf5
1 changed files with 8 additions and 5 deletions
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13
glm/gtc/matrix_transform.inl
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@ -322,20 +322,23 @@ namespace glm
return frustumRH_NO(left, right, bottom, top, nearVal, farVal); return frustumRH_NO(left, right, bottom, top, nearVal, farVal);
# endif # endif
} }
//projection matrix code from Vulkan-CookBook
// Author: Pawel Lapinski
// LinkedIn: https://www.linkedin.com/in/pawel-lapinski-84522329
template<typename T> template<typename T>
GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveRH_ZO(T fovy, T aspect, T zNear, T zFar) GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveRH_ZO(T fovy, T aspect, T zNear, T zFar)
{ {
assert(abs(aspect - std::numeric_limits<T>::epsilon()) > static_cast<T>(0)); assert(abs(aspect - std::numeric_limits<T>::epsilon()) > static_cast<T>(0));
T const tanHalfFovy = tan(fovy / static_cast<T>(2)); T const f = static_cast<T>(1) / tan(static_cast<T>(0.5) * fovy);
mat<4, 4, T, defaultp> Result(static_cast<T>(0)); mat<4, 4, T, defaultp> Result(static_cast<T>(0));
Result[0][0] = static_cast<T>(1) / (aspect * tanHalfFovy); Result[0][0] = f / aspect;
Result[1][1] = static_cast<T>(1) / (tanHalfFovy); Result[1][1] = -f;
Result[2][2] = zFar / (zNear - zFar); Result[2][2] = zFar / (zNear - zFar);
Result[2][3] = - static_cast<T>(1); Result[2][3] = - static_cast<T>(1);
Result[3][2] = -(zFar * zNear) / (zFar - zNear); Result[3][2] = (zNear * zFar) / (zNear - zFar);
return Result; return Result;
} }