From 2ebab9358d5aaad8fd2682232892025b13c7161c Mon Sep 17 00:00:00 2001
From: Mid <>
Date: Sun, 12 Oct 2025 20:43:17 +0300
Subject: [PATCH] Shadowmap size limit

---
 src/k3.c | 6 +++++-
 src/k3.h | 2 +-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/k3.c b/src/k3.c
index 8d6fb3b..44dd7e8 100644
--- a/src/k3.c
+++ b/src/k3.c
@@ -2150,7 +2150,7 @@ void k3PassIrregular(struct k3Offscreen *mainview, mat4 mainproj, mat4 maincam)
 #endif
 
 // Constructs shadowmap atlas, saves `offscr` for own use
-void k3PassShadowmap(mat4 projection, mat4 cam, struct k3Offscreen *offscr) {
+void k3PassShadowmap(mat4 projection, mat4 cam, struct k3Offscreen *offscr, float cellSizeLimit) {
 	glm_mat4_copy(projection, ProjMat);
 	glm_mat4_copy(cam, CamMat);
 	
@@ -2194,6 +2194,10 @@ void k3PassShadowmap(mat4 projection, mat4 cam, struct k3Offscreen *offscr) {
 	uint16_t sz = k3TexSzX(offscr->depth);
 	float cellSz = (float) sz / cellsPerDimension;
 	
+	if(cellSizeLimit > 0) {
+		cellSz = fminf(cellSizeLimit, cellSz);
+	}
+	
 	k3BeginOffscreen(offscr);
 		size_t i = 0;
 		for(size_t li = 0; li < LightCount; li++) {
diff --git a/src/k3.h b/src/k3.h
index 996459e..cfe5287 100644
--- a/src/k3.h
+++ b/src/k3.h
@@ -185,7 +185,7 @@ void k3BatchClear();
 void k3PassForward(mat4 projection, mat4 cam);
 void k3PassDepthOnly(mat4 projection, mat4 cam, int clear, int cull);
 
-void k3PassShadowmap(mat4 projection, mat4 cam, struct k3Offscreen *offscr);
+void k3PassShadowmap(mat4 projection, mat4 cam, struct k3Offscreen *offscr, float cellSizeLimit);
 
 struct k3Offscreen;
 struct k3Offscreen *k3OffscreenCreateMultisampled(struct k3Tex *diffuse, struct k3Tex *depth, uint8_t samples);