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-rw-r--r--gfx/lightDirection.cpp8
-rw-r--r--gfx/lightDirection.h32
2 files changed, 40 insertions, 0 deletions
diff --git a/gfx/lightDirection.cpp b/gfx/lightDirection.cpp
new file mode 100644
index 0000000..6d7d1ea
--- /dev/null
+++ b/gfx/lightDirection.cpp
@@ -0,0 +1,8 @@
+#include "lightDirection.h"
+#include "maths.h"
+
+LightDirection::LightDirection(const Direction2D sunPos) :
+ pos {sunPos}, vec {glm::mat3 {rotate_yp(pi + sunPos.x, -sunPos.y)} * north},
+ vert {-glm::clamp(-1.F, 0.F, vec.z - 0.1F)}
+{
+}
diff --git a/gfx/lightDirection.h b/gfx/lightDirection.h
new file mode 100644
index 0000000..f1e1cc4
--- /dev/null
+++ b/gfx/lightDirection.h
@@ -0,0 +1,32 @@
+#pragma once
+
+#include "config/types.h"
+
+class LightDirection {
+public:
+ // NOLINTNEXTLINE(hicpp-explicit-conversions) deliberately a helper
+ LightDirection(Direction2D sunPos);
+
+ [[nodiscard]] Direction2D
+ position() const noexcept
+ {
+ return pos;
+ }
+
+ [[nodiscard]] Direction3D
+ vector() const noexcept
+ {
+ return vec;
+ }
+
+ [[nodiscard]] float
+ vertical() const noexcept
+ {
+ return vert;
+ }
+
+private:
+ Direction2D pos;
+ Direction3D vec;
+ float vert;
+};