From 64de49cf9910a21b42de89a9690dd4a44c004849 Mon Sep 17 00:00:00 2001
From: NishiOwO <nishi@nishi.boats>
Date: Mon, 2 Feb 2026 19:11:51 +0900
Subject: [PATCH] better

---
 engine/data/shader/shadow.fs |  4 ++--
 engine/src/client.c          |  5 +++++
 engine/src/gl/gl_shadow.c    | 13 +++++++++++--
 3 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/engine/data/shader/shadow.fs b/engine/data/shader/shadow.fs
index 46f7932..658884f 100644
--- a/engine/data/shader/shadow.fs
+++ b/engine/data/shader/shadow.fs
@@ -16,7 +16,7 @@ vec4 PhongShading(void)
         vec3 L = normalize(gl_LightSource[0].position.xyz-vPos.xyz);
 
 	if(gl_LightSource[0].position.w < 0.5){
-		L = normalize(gl_LightSource[0].position.xyz);
+		L = -normalize(gl_LightSource[0].position.xyz);
 	}
 
         vec4 ambient = gl_FrontLightProduct[0].ambient;
@@ -59,7 +59,7 @@ float ShadowCoef(void){
 			shadow_coef -= 0.2;
 		}
 	}
-
+	
 	return shadow_coef;
 }
 
diff --git a/engine/src/client.c b/engine/src/client.c
index 8ff30c2..b0316e6 100644
--- a/engine/src/client.c
+++ b/engine/src/client.c
@@ -49,6 +49,11 @@ GSClient GSClientCreate(GSEngine engine) {
 	client->light0[2] = 0;
 	client->light0[3] = 1;
 
+	client->light0[0] = -1;
+	client->light0[1] = -1;
+	client->light0[2] = 0;
+	client->light0[3] = 0;
+
 	client->skybox_enabled = GSFalse;
 
 	if((client->sengine = GSSoundEngineCreate(client)) == NULL) {
diff --git a/engine/src/gl/gl_shadow.c b/engine/src/gl/gl_shadow.c
index 37b7308..fe6c610 100644
--- a/engine/src/gl/gl_shadow.c
+++ b/engine/src/gl/gl_shadow.c
@@ -58,7 +58,7 @@ GSBool GSGLShadowBeforeMapping(GSGL gl) {
 	if(gl->engine->client->light0[3]) {
 		GSGLCameraPerspective(gl, GSGLMaxShadowDistance, GSGLMaxShadowDistance);
 	} else {
-		glOrtho(-GSGLMaxShadowDistance / 2, GSGLMaxShadowDistance / 2, -GSGLMaxShadowDistance / 2, GSGLMaxShadowDistance / 2, -GSGLMaxDistance, GSGLMaxDistance);
+		glOrtho(-10, 10, -10, 10, -10, 20);
 	}
 
 	glGetDoublev(GL_PROJECTION_MATRIX, gl->shadow_projection);
@@ -66,7 +66,16 @@ GSBool GSGLShadowBeforeMapping(GSGL gl) {
 	glMatrixMode(GL_MODELVIEW);
 	glGetDoublev(GL_MODELVIEW_MATRIX, gl->shadow_old_modelview);
 	glLoadIdentity();
-	GSGLCameraLookAt(gl, gl->engine->client->light0, zero);
+	if(gl->engine->client->light0[3]){
+		GSGLCameraLookAt(gl, gl->engine->client->light0, zero);
+	}else{
+		GSVector3 n;
+		int i;
+
+		for(i = 0; i < 3; i++) n[i] = -gl->engine->client->light0[i];
+
+		GSGLCameraLookAt(gl, n, zero);
+	}
 
 	glGetDoublev(GL_MODELVIEW_MATRIX, gl->shadow_modelview);