From 85bab15d23b6ed37a316fdfceaae3cdf496f5f59 Mon Sep 17 00:00:00 2001
From: oreo639 <oreo6391@gmail.com>
Date: Fri, 11 Aug 2023 14:57:10 -0700
Subject: [PATCH] Add C3D_LightEnvBumpUseNormalZ()

---
 include/c3d/light.h | 1 +
 source/lightenv.c   | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/include/c3d/light.h b/include/c3d/light.h
index 3a477a1e..de2fed9f 100644
--- a/include/c3d/light.h
+++ b/include/c3d/light.h
@@ -77,6 +77,7 @@ enum
 void C3D_LightEnvFresnel(C3D_LightEnv* env, GPU_FRESNELSEL selector);
 void C3D_LightEnvBumpMode(C3D_LightEnv* env, GPU_BUMPMODE mode);
 void C3D_LightEnvBumpSel(C3D_LightEnv* env, int texUnit);
+void C3D_LightEnvBumpUseNormalZ(C3D_LightEnv *env, bool usez);
 void C3D_LightEnvShadowMode(C3D_LightEnv* env, u32 mode);
 void C3D_LightEnvShadowSel(C3D_LightEnv* env, int texUnit);
 void C3D_LightEnvClampHighlights(C3D_LightEnv* env, bool clamp);
diff --git a/source/lightenv.c b/source/lightenv.c
index 25eea29a..e69d7089 100644
--- a/source/lightenv.c
+++ b/source/lightenv.c
@@ -250,6 +250,14 @@ void C3D_LightEnvBumpSel(C3D_LightEnv* env, int texUnit)
 	env->flags |= C3DF_LightEnv_Dirty;
 }
 
+void C3D_LightEnvBumpUseNormalZ(C3D_LightEnv *env, bool usez) {
+	if (usez)
+		env->conf.config[0] |= BIT(30);
+	else
+		env->conf.config[0] &= ~BIT(30);
+	env->flags |= C3DF_LightEnv_Dirty;
+}
+
 void C3D_LightEnvShadowMode(C3D_LightEnv* env, u32 mode)
 {
 	mode &= 0xF<<16;