From a8b3118e8305fd1c668ea25e07157b625c9747ff Mon Sep 17 00:00:00 2001 From: Joursoir Date: Sat, 10 Apr 2021 17:29:02 +0000 Subject: add glm headers --- src/include/glm/ext/matrix_clip_space.inl | 555 ++++++++++++++++++++++++++++++ 1 file changed, 555 insertions(+) create mode 100644 src/include/glm/ext/matrix_clip_space.inl (limited to 'src/include/glm/ext/matrix_clip_space.inl') diff --git a/src/include/glm/ext/matrix_clip_space.inl b/src/include/glm/ext/matrix_clip_space.inl new file mode 100644 index 0000000..52c667c --- /dev/null +++ b/src/include/glm/ext/matrix_clip_space.inl @@ -0,0 +1,555 @@ +namespace glm +{ + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> ortho(T left, T right, T bottom, T top) + { + mat<4, 4, T, defaultp> Result(static_cast(1)); + Result[0][0] = static_cast(2) / (right - left); + Result[1][1] = static_cast(2) / (top - bottom); + Result[2][2] = - static_cast(1); + Result[3][0] = - (right + left) / (right - left); + Result[3][1] = - (top + bottom) / (top - bottom); + return Result; + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> orthoLH_ZO(T left, T right, T bottom, T top, T zNear, T zFar) + { + mat<4, 4, T, defaultp> Result(1); + Result[0][0] = static_cast(2) / (right - left); + Result[1][1] = static_cast(2) / (top - bottom); + Result[2][2] = static_cast(1) / (zFar - zNear); + Result[3][0] = - (right + left) / (right - left); + Result[3][1] = - (top + bottom) / (top - bottom); + Result[3][2] = - zNear / (zFar - zNear); + return Result; + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> orthoLH_NO(T left, T right, T bottom, T top, T zNear, T zFar) + { + mat<4, 4, T, defaultp> Result(1); + Result[0][0] = static_cast(2) / (right - left); + Result[1][1] = static_cast(2) / (top - bottom); + Result[2][2] = static_cast(2) / (zFar - zNear); + Result[3][0] = - (right + left) / (right - left); + Result[3][1] = - (top + bottom) / (top - bottom); + Result[3][2] = - (zFar + zNear) / (zFar - zNear); + return Result; + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> orthoRH_ZO(T left, T right, T bottom, T top, T zNear, T zFar) + { + mat<4, 4, T, defaultp> Result(1); + Result[0][0] = static_cast(2) / (right - left); + Result[1][1] = static_cast(2) / (top - bottom); + Result[2][2] = - static_cast(1) / (zFar - zNear); + Result[3][0] = - (right + left) / (right - left); + Result[3][1] = - (top + bottom) / (top - bottom); + Result[3][2] = - zNear / (zFar - zNear); + return Result; + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> orthoRH_NO(T left, T right, T bottom, T top, T zNear, T zFar) + { + mat<4, 4, T, defaultp> Result(1); + Result[0][0] = static_cast(2) / (right - left); + Result[1][1] = static_cast(2) / (top - bottom); + Result[2][2] = - static_cast(2) / (zFar - zNear); + Result[3][0] = - (right + left) / (right - left); + Result[3][1] = - (top + bottom) / (top - bottom); + Result[3][2] = - (zFar + zNear) / (zFar - zNear); + return Result; + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> orthoZO(T left, T right, T bottom, T top, T zNear, T zFar) + { +# if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT + return orthoLH_ZO(left, right, bottom, top, zNear, zFar); +# else + return orthoRH_ZO(left, right, bottom, top, zNear, zFar); +# endif + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> orthoNO(T left, T right, T bottom, T top, T zNear, T zFar) + { +# if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT + return orthoLH_NO(left, right, bottom, top, zNear, zFar); +# else + return orthoRH_NO(left, right, bottom, top, zNear, zFar); +# endif + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> orthoLH(T left, T right, T bottom, T top, T zNear, T zFar) + { +# if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_ZO_BIT + return orthoLH_ZO(left, right, bottom, top, zNear, zFar); +# else + return orthoLH_NO(left, right, bottom, top, zNear, zFar); +# endif + + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> orthoRH(T left, T right, T bottom, T top, T zNear, T zFar) + { +# if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_ZO_BIT + return orthoRH_ZO(left, right, bottom, top, zNear, zFar); +# else + return orthoRH_NO(left, right, bottom, top, zNear, zFar); +# endif + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> ortho(T left, T right, T bottom, T top, T zNear, T zFar) + { +# if GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_LH_ZO + return orthoLH_ZO(left, right, bottom, top, zNear, zFar); +# elif GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_LH_NO + return orthoLH_NO(left, right, bottom, top, zNear, zFar); +# elif GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_RH_ZO + return orthoRH_ZO(left, right, bottom, top, zNear, zFar); +# elif GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_RH_NO + return orthoRH_NO(left, right, bottom, top, zNear, zFar); +# endif + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> frustumLH_ZO(T left, T right, T bottom, T top, T nearVal, T farVal) + { + mat<4, 4, T, defaultp> Result(0); + Result[0][0] = (static_cast(2) * nearVal) / (right - left); + Result[1][1] = (static_cast(2) * nearVal) / (top - bottom); + Result[2][0] = (right + left) / (right - left); + Result[2][1] = (top + bottom) / (top - bottom); + Result[2][2] = farVal / (farVal - nearVal); + Result[2][3] = static_cast(1); + Result[3][2] = -(farVal * nearVal) / (farVal - nearVal); + return Result; + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> frustumLH_NO(T left, T right, T bottom, T top, T nearVal, T farVal) + { + mat<4, 4, T, defaultp> Result(0); + Result[0][0] = (static_cast(2) * nearVal) / (right - left); + Result[1][1] = (static_cast(2) * nearVal) / (top - bottom); + Result[2][0] = (right + left) / (right - left); + Result[2][1] = (top + bottom) / (top - bottom); + Result[2][2] = (farVal + nearVal) / (farVal - nearVal); + Result[2][3] = static_cast(1); + Result[3][2] = - (static_cast(2) * farVal * nearVal) / (farVal - nearVal); + return Result; + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> frustumRH_ZO(T left, T right, T bottom, T top, T nearVal, T farVal) + { + mat<4, 4, T, defaultp> Result(0); + Result[0][0] = (static_cast(2) * nearVal) / (right - left); + Result[1][1] = (static_cast(2) * nearVal) / (top - bottom); + Result[2][0] = (right + left) / (right - left); + Result[2][1] = (top + bottom) / (top - bottom); + Result[2][2] = farVal / (nearVal - farVal); + Result[2][3] = static_cast(-1); + Result[3][2] = -(farVal * nearVal) / (farVal - nearVal); + return Result; + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> frustumRH_NO(T left, T right, T bottom, T top, T nearVal, T farVal) + { + mat<4, 4, T, defaultp> Result(0); + Result[0][0] = (static_cast(2) * nearVal) / (right - left); + Result[1][1] = (static_cast(2) * nearVal) / (top - bottom); + Result[2][0] = (right + left) / (right - left); + Result[2][1] = (top + bottom) / (top - bottom); + Result[2][2] = - (farVal + nearVal) / (farVal - nearVal); + Result[2][3] = static_cast(-1); + Result[3][2] = - (static_cast(2) * farVal * nearVal) / (farVal - nearVal); + return Result; + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> frustumZO(T left, T right, T bottom, T top, T nearVal, T farVal) + { +# if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT + return frustumLH_ZO(left, right, bottom, top, nearVal, farVal); +# else + return frustumRH_ZO(left, right, bottom, top, nearVal, farVal); +# endif + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> frustumNO(T left, T right, T bottom, T top, T nearVal, T farVal) + { +# if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT + return frustumLH_NO(left, right, bottom, top, nearVal, farVal); +# else + return frustumRH_NO(left, right, bottom, top, nearVal, farVal); +# endif + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> frustumLH(T left, T right, T bottom, T top, T nearVal, T farVal) + { +# if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_ZO_BIT + return frustumLH_ZO(left, right, bottom, top, nearVal, farVal); +# else + return frustumLH_NO(left, right, bottom, top, nearVal, farVal); +# endif + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> frustumRH(T left, T right, T bottom, T top, T nearVal, T farVal) + { +# if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_ZO_BIT + return frustumRH_ZO(left, right, bottom, top, nearVal, farVal); +# else + return frustumRH_NO(left, right, bottom, top, nearVal, farVal); +# endif + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> frustum(T left, T right, T bottom, T top, T nearVal, T farVal) + { +# if GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_LH_ZO + return frustumLH_ZO(left, right, bottom, top, nearVal, farVal); +# elif GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_LH_NO + return frustumLH_NO(left, right, bottom, top, nearVal, farVal); +# elif GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_RH_ZO + return frustumRH_ZO(left, right, bottom, top, nearVal, farVal); +# elif GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_RH_NO + return frustumRH_NO(left, right, bottom, top, nearVal, farVal); +# endif + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveRH_ZO(T fovy, T aspect, T zNear, T zFar) + { + assert(abs(aspect - std::numeric_limits::epsilon()) > static_cast(0)); + + T const tanHalfFovy = tan(fovy / static_cast(2)); + + mat<4, 4, T, defaultp> Result(static_cast(0)); + Result[0][0] = static_cast(1) / (aspect * tanHalfFovy); + Result[1][1] = static_cast(1) / (tanHalfFovy); + Result[2][2] = zFar / (zNear - zFar); + Result[2][3] = - static_cast(1); + Result[3][2] = -(zFar * zNear) / (zFar - zNear); + return Result; + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveRH_NO(T fovy, T aspect, T zNear, T zFar) + { + assert(abs(aspect - std::numeric_limits::epsilon()) > static_cast(0)); + + T const tanHalfFovy = tan(fovy / static_cast(2)); + + mat<4, 4, T, defaultp> Result(static_cast(0)); + Result[0][0] = static_cast(1) / (aspect * tanHalfFovy); + Result[1][1] = static_cast(1) / (tanHalfFovy); + Result[2][2] = - (zFar + zNear) / (zFar - zNear); + Result[2][3] = - static_cast(1); + Result[3][2] = - (static_cast(2) * zFar * zNear) / (zFar - zNear); + return Result; + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveLH_ZO(T fovy, T aspect, T zNear, T zFar) + { + assert(abs(aspect - std::numeric_limits::epsilon()) > static_cast(0)); + + T const tanHalfFovy = tan(fovy / static_cast(2)); + + mat<4, 4, T, defaultp> Result(static_cast(0)); + Result[0][0] = static_cast(1) / (aspect * tanHalfFovy); + Result[1][1] = static_cast(1) / (tanHalfFovy); + Result[2][2] = zFar / (zFar - zNear); + Result[2][3] = static_cast(1); + Result[3][2] = -(zFar * zNear) / (zFar - zNear); + return Result; + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveLH_NO(T fovy, T aspect, T zNear, T zFar) + { + assert(abs(aspect - std::numeric_limits::epsilon()) > static_cast(0)); + + T const tanHalfFovy = tan(fovy / static_cast(2)); + + mat<4, 4, T, defaultp> Result(static_cast(0)); + Result[0][0] = static_cast(1) / (aspect * tanHalfFovy); + Result[1][1] = static_cast(1) / (tanHalfFovy); + Result[2][2] = (zFar + zNear) / (zFar - zNear); + Result[2][3] = static_cast(1); + Result[3][2] = - (static_cast(2) * zFar * zNear) / (zFar - zNear); + return Result; + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveZO(T fovy, T aspect, T zNear, T zFar) + { +# if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT + return perspectiveLH_ZO(fovy, aspect, zNear, zFar); +# else + return perspectiveRH_ZO(fovy, aspect, zNear, zFar); +# endif + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveNO(T fovy, T aspect, T zNear, T zFar) + { +# if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT + return perspectiveLH_NO(fovy, aspect, zNear, zFar); +# else + return perspectiveRH_NO(fovy, aspect, zNear, zFar); +# endif + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveLH(T fovy, T aspect, T zNear, T zFar) + { +# if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_ZO_BIT + return perspectiveLH_ZO(fovy, aspect, zNear, zFar); +# else + return perspectiveLH_NO(fovy, aspect, zNear, zFar); +# endif + + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveRH(T fovy, T aspect, T zNear, T zFar) + { +# if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_ZO_BIT + return perspectiveRH_ZO(fovy, aspect, zNear, zFar); +# else + return perspectiveRH_NO(fovy, aspect, zNear, zFar); +# endif + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspective(T fovy, T aspect, T zNear, T zFar) + { +# if GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_LH_ZO + return perspectiveLH_ZO(fovy, aspect, zNear, zFar); +# elif GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_LH_NO + return perspectiveLH_NO(fovy, aspect, zNear, zFar); +# elif GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_RH_ZO + return perspectiveRH_ZO(fovy, aspect, zNear, zFar); +# elif GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_RH_NO + return perspectiveRH_NO(fovy, aspect, zNear, zFar); +# endif + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveFovRH_ZO(T fov, T width, T height, T zNear, T zFar) + { + assert(width > static_cast(0)); + assert(height > static_cast(0)); + assert(fov > static_cast(0)); + + T const rad = fov; + T const h = glm::cos(static_cast(0.5) * rad) / glm::sin(static_cast(0.5) * rad); + T const w = h * height / width; ///todo max(width , Height) / min(width , Height)? + + mat<4, 4, T, defaultp> Result(static_cast(0)); + Result[0][0] = w; + Result[1][1] = h; + Result[2][2] = zFar / (zNear - zFar); + Result[2][3] = - static_cast(1); + Result[3][2] = -(zFar * zNear) / (zFar - zNear); + return Result; + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveFovRH_NO(T fov, T width, T height, T zNear, T zFar) + { + assert(width > static_cast(0)); + assert(height > static_cast(0)); + assert(fov > static_cast(0)); + + T const rad = fov; + T const h = glm::cos(static_cast(0.5) * rad) / glm::sin(static_cast(0.5) * rad); + T const w = h * height / width; ///todo max(width , Height) / min(width , Height)? + + mat<4, 4, T, defaultp> Result(static_cast(0)); + Result[0][0] = w; + Result[1][1] = h; + Result[2][2] = - (zFar + zNear) / (zFar - zNear); + Result[2][3] = - static_cast(1); + Result[3][2] = - (static_cast(2) * zFar * zNear) / (zFar - zNear); + return Result; + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveFovLH_ZO(T fov, T width, T height, T zNear, T zFar) + { + assert(width > static_cast(0)); + assert(height > static_cast(0)); + assert(fov > static_cast(0)); + + T const rad = fov; + T const h = glm::cos(static_cast(0.5) * rad) / glm::sin(static_cast(0.5) * rad); + T const w = h * height / width; ///todo max(width , Height) / min(width , Height)? + + mat<4, 4, T, defaultp> Result(static_cast(0)); + Result[0][0] = w; + Result[1][1] = h; + Result[2][2] = zFar / (zFar - zNear); + Result[2][3] = static_cast(1); + Result[3][2] = -(zFar * zNear) / (zFar - zNear); + return Result; + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveFovLH_NO(T fov, T width, T height, T zNear, T zFar) + { + assert(width > static_cast(0)); + assert(height > static_cast(0)); + assert(fov > static_cast(0)); + + T const rad = fov; + T const h = glm::cos(static_cast(0.5) * rad) / glm::sin(static_cast(0.5) * rad); + T const w = h * height / width; ///todo max(width , Height) / min(width , Height)? + + mat<4, 4, T, defaultp> Result(static_cast(0)); + Result[0][0] = w; + Result[1][1] = h; + Result[2][2] = (zFar + zNear) / (zFar - zNear); + Result[2][3] = static_cast(1); + Result[3][2] = - (static_cast(2) * zFar * zNear) / (zFar - zNear); + return Result; + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveFovZO(T fov, T width, T height, T zNear, T zFar) + { +# if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT + return perspectiveFovLH_ZO(fov, width, height, zNear, zFar); +# else + return perspectiveFovRH_ZO(fov, width, height, zNear, zFar); +# endif + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveFovNO(T fov, T width, T height, T zNear, T zFar) + { +# if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT + return perspectiveFovLH_NO(fov, width, height, zNear, zFar); +# else + return perspectiveFovRH_NO(fov, width, height, zNear, zFar); +# endif + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveFovLH(T fov, T width, T height, T zNear, T zFar) + { +# if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_ZO_BIT + return perspectiveFovLH_ZO(fov, width, height, zNear, zFar); +# else + return perspectiveFovLH_NO(fov, width, height, zNear, zFar); +# endif + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveFovRH(T fov, T width, T height, T zNear, T zFar) + { +# if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_ZO_BIT + return perspectiveFovRH_ZO(fov, width, height, zNear, zFar); +# else + return perspectiveFovRH_NO(fov, width, height, zNear, zFar); +# endif + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveFov(T fov, T width, T height, T zNear, T zFar) + { +# if GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_LH_ZO + return perspectiveFovLH_ZO(fov, width, height, zNear, zFar); +# elif GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_LH_NO + return perspectiveFovLH_NO(fov, width, height, zNear, zFar); +# elif GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_RH_ZO + return perspectiveFovRH_ZO(fov, width, height, zNear, zFar); +# elif GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_RH_NO + return perspectiveFovRH_NO(fov, width, height, zNear, zFar); +# endif + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> infinitePerspectiveRH(T fovy, T aspect, T zNear) + { + T const range = tan(fovy / static_cast(2)) * zNear; + T const left = -range * aspect; + T const right = range * aspect; + T const bottom = -range; + T const top = range; + + mat<4, 4, T, defaultp> Result(static_cast(0)); + Result[0][0] = (static_cast(2) * zNear) / (right - left); + Result[1][1] = (static_cast(2) * zNear) / (top - bottom); + Result[2][2] = - static_cast(1); + Result[2][3] = - static_cast(1); + Result[3][2] = - static_cast(2) * zNear; + return Result; + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> infinitePerspectiveLH(T fovy, T aspect, T zNear) + { + T const range = tan(fovy / static_cast(2)) * zNear; + T const left = -range * aspect; + T const right = range * aspect; + T const bottom = -range; + T const top = range; + + mat<4, 4, T, defaultp> Result(T(0)); + Result[0][0] = (static_cast(2) * zNear) / (right - left); + Result[1][1] = (static_cast(2) * zNear) / (top - bottom); + Result[2][2] = static_cast(1); + Result[2][3] = static_cast(1); + Result[3][2] = - static_cast(2) * zNear; + return Result; + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> infinitePerspective(T fovy, T aspect, T zNear) + { +# if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT + return infinitePerspectiveLH(fovy, aspect, zNear); +# else + return infinitePerspectiveRH(fovy, aspect, zNear); +# endif + } + + // Infinite projection matrix: http://www.terathon.com/gdc07_lengyel.pdf + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> tweakedInfinitePerspective(T fovy, T aspect, T zNear, T ep) + { + T const range = tan(fovy / static_cast(2)) * zNear; + T const left = -range * aspect; + T const right = range * aspect; + T const bottom = -range; + T const top = range; + + mat<4, 4, T, defaultp> Result(static_cast(0)); + Result[0][0] = (static_cast(2) * zNear) / (right - left); + Result[1][1] = (static_cast(2) * zNear) / (top - bottom); + Result[2][2] = ep - static_cast(1); + Result[2][3] = static_cast(-1); + Result[3][2] = (ep - static_cast(2)) * zNear; + return Result; + } + + template + GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> tweakedInfinitePerspective(T fovy, T aspect, T zNear) + { + return tweakedInfinitePerspective(fovy, aspect, zNear, epsilon()); + } +}//namespace glm -- cgit v1.2.3-18-g5258