From f3bb7ada9a633f48c7bdeb913e672627ea70588c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20T=C5=AFma?= <tumic@cbox.cz>
Date: Mon, 26 Feb 2024 09:10:38 +0100
Subject: [PATCH] Split the alpha and z values

---
 src/map/hillshading.cpp | 5 ++---
 src/map/hillshading.h   | 2 +-
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/map/hillshading.cpp b/src/map/hillshading.cpp
index 3e96db72..514417e2 100644
--- a/src/map/hillshading.cpp
+++ b/src/map/hillshading.cpp
@@ -59,8 +59,8 @@ static void getSubmatrix(int x, int y, const Matrix &m, SubMatrix &sm)
 	sm.z9 = m.m(bottom, right);
 }
 
-QImage HillShading::render(const Matrix &m, quint8 alpha, double azimuth,
-  double elevation)
+QImage HillShading::render(const Matrix &m, quint8 alpha, double z,
+  double azimuth, double elevation)
 {
 	QImage img(m.w() - 2, m.h() - 2, QImage::Format_ARGB32_Premultiplied);
 	uchar *bits = img.bits();
@@ -69,7 +69,6 @@ QImage HillShading::render(const Matrix &m, quint8 alpha, double azimuth,
 	Constants c;
 	SubMatrix sm;
 	Derivatives d;
-	double z = (double)alpha / 0xFF;
 
 	getConstants(azimuth, elevation, c);
 
diff --git a/src/map/hillshading.h b/src/map/hillshading.h
index 9d84d703..7accd380 100644
--- a/src/map/hillshading.h
+++ b/src/map/hillshading.h
@@ -7,7 +7,7 @@
 class HillShading
 {
 public:
-	static QImage render(const Matrix &m, quint8 alpha = 64,
+	static QImage render(const Matrix &m, quint8 alpha = 64, double z = 0.3,
 	  double azimuth = 315, double elevation = 25);
 };