From dd452f3e9238be954c3ecd325ed11e97a50ec1c3 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Mon, 19 Aug 2024 23:26:32 +0100
Subject: Persist a single ShadowStenciller within ShadowMapper

---
 gfx/gl/shadowStenciller.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'gfx/gl/shadowStenciller.cpp')

diff --git a/gfx/gl/shadowStenciller.cpp b/gfx/gl/shadowStenciller.cpp
index fc3d77c..ac63b4e 100644
--- a/gfx/gl/shadowStenciller.cpp
+++ b/gfx/gl/shadowStenciller.cpp
@@ -7,8 +7,7 @@
 #include "gl_traits.h"
 #include <stdexcept>
 
-ShadowStenciller::ShadowStenciller(const Direction3D & lightDir, const Direction3D & lightDirUp) :
-	shadowCaster {shadowStencil_vs, shadowStencil_fs}, lightDirMat {glm::lookAt(-lightDir, {}, lightDirUp)}
+ShadowStenciller::ShadowStenciller() : shadowCaster {shadowStencil_vs, shadowStencil_fs}
 {
 	glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 	glDrawBuffer(GL_NONE);
@@ -16,6 +15,12 @@ ShadowStenciller::ShadowStenciller(const Direction3D & lightDir, const Direction
 	glBindFramebuffer(GL_FRAMEBUFFER, 0);
 }
 
+void
+ShadowStenciller::setLightDirection(const Direction3D & lightDir, const Direction3D & lightDirUp)
+{
+	lightDirMat = glm::lookAt(-lightDir, {}, lightDirUp);
+}
+
 glTexture
 ShadowStenciller::createStencilTexture(GLsizei width, GLsizei height)
 {
-- 
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