--- ORIG/glclock.cpp	Wed Aug  4 16:28:02 1999
+++ glclock.cpp	Mon Sep 20 20:06:09 1999
@@ -5716,7 +5716,10 @@
 	o_tick = n_tick ;
 
 	if ((n_tick = glutGet((GLenum)GLUT_ELAPSED_TIME)))
-		fps = f_cnt / ((float)(n_tick - o_tick) / 1000) ;
+		if ( n_tick == o_tick )
+			fps = 0.0f;
+		else
+			fps = f_cnt / ((float)(n_tick - o_tick) / 1000) ;
 	else
 		fps = 0.0f ;
 
@@ -5768,7 +5771,8 @@
 	{
 		if (fps_count)
 		{
-			spin_x = -360.0f / fps ;
+			if (fps) spin_x = -360.0f / fps ;
+			else     spin_x = -30.0f;
 			if (spin_x < -30.0f) spin_x = -30.0f ;
 		}
 
@@ -7098,6 +7102,13 @@
 	if (!env_file.Search(".ppm"))   env_file   += ".ppm" ;
 	if (!solid_file.Search(".ppm")) solid_file += ".ppm" ;
 	if (sld2_file != String("") && !sld2_file.Search(".ppm")) sld2_file += ".ppm" ;
+
+	if ( env_file.Length() && env_file.Character(0) != '/' ) \
+		env_file = String( GLCLOCK_DIR ) + env_file;
+	if ( solid_file.Length() && solid_file.Character(0) != '/' ) \
+		solid_file = String( GLCLOCK_DIR ) + solid_file;
+	if ( sld2_file.Length() && sld2_file.Character(0) != '/' ) \
+		sld2_file = String( GLCLOCK_DIR ) + sld2_file;
 
 
 	// 環境マッピングを使用する場合は、メッシュの座標値を多少変更