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| author | Dan Goodliffe <dan@randomdan.homeip.net> | 2022-12-28 14:04:01 +0000 |
|---|---|---|
| committer | Dan Goodliffe <dan@randomdan.homeip.net> | 2022-12-28 14:04:06 +0000 |
| commit | 35f73ba19deb13ff1971983bc9c21fe342c91214 (patch) | |
| tree | c085093b87e42ed497b42575747da890b09c5078 /gfx/gl/camera.cpp | |
| parent | Use the existence of .substr(...) to test if a T is stringlike (diff) | |
| download | ilt-35f73ba19deb13ff1971983bc9c21fe342c91214.tar.bz2 ilt-35f73ba19deb13ff1971983bc9c21fe342c91214.tar.xz ilt-35f73ba19deb13ff1971983bc9c21fe342c91214.zip | |
Reduce camera extents to the point they cross the sea floor boundary
Diffstat (limited to 'gfx/gl/camera.cpp')
| -rw-r--r-- | gfx/gl/camera.cpp | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/gfx/gl/camera.cpp b/gfx/gl/camera.cpp index ff706e7..5ae5fb0 100644 --- a/gfx/gl/camera.cpp +++ b/gfx/gl/camera.cpp @@ -1,4 +1,5 @@ #include "camera.h" +#include <glm/gtx/intersect.hpp> // IWYU pragma: keep #include <glm/gtx/transform.hpp> // IWYU pragma: keep #include <maths.h> #include <ray.hpp> @@ -35,6 +36,14 @@ Camera::upFromForward(const glm::vec3 & forward) std::array<glm::vec3, 4> Camera::extentsAtDist(const float dist) const { + const auto adjustToSeafloor = [this](glm::vec3 & target) { + const auto vec = glm::normalize(target - position); + constexpr glm::vec3 seafloor {0, 0, -1.5}; + float outdist; + if (glm::intersectRayPlane(position, vec, seafloor, ::up, outdist)) { + target = vec * outdist + position; + } + }; const auto depth = -(2.f * (dist - near) * far) / (dist * (near - far)) - 1.f; static constexpr const std::array extents {-1.F, 1.F}; std::array<glm::vec3, 4> out {}; @@ -44,7 +53,11 @@ Camera::extentsAtDist(const float dist) const const glm::vec4 in {x, y, depth, 1.f}; const auto out = inverseViewProjection * in; - *outitr++ = out / out.w; + *outitr = out / out.w; + if (outitr->z < -1.5f) { + adjustToSeafloor(*outitr); + } + outitr++; } } return out; |