fixed backwards bumps in r_shadow_glsl 1 mode

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@5126 d7cf8633-e32d-0410-b094-e92efae38249

diff --git a/r_shadow.c b/r_shadow.c
index ee083d246e3d0cf1b8087695f3520796a50febd7..949c233927c4218d3db92d4c0550224fdbe7ccb1 100644 (file)
--- a/r_shadow.c
+++ b/r_shadow.c
@@ -273,15 +273,15 @@ const char *builtinshader_light_vert =
 "      // (we use unnormalized to ensure that it interpolates correctly and then\n"
 "      //  normalize it per pixel)\n"
 "      vec3 lightminusvertex = LightPosition - gl_Vertex.xyz;\n"
-"      LightVector.x = dot(lightminusvertex, gl_MultiTexCoord1.xyz);\n"
-"      LightVector.y = dot(lightminusvertex, gl_MultiTexCoord2.xyz);\n"
+"      LightVector.x = -dot(lightminusvertex, gl_MultiTexCoord1.xyz);\n"
+"      LightVector.y = -dot(lightminusvertex, gl_MultiTexCoord2.xyz);\n"
 "      LightVector.z = -dot(lightminusvertex, gl_MultiTexCoord3.xyz);\n"
 "\n"
 "#if defined(USESPECULAR) || defined(USEFOG) || defined(USEOFFSETMAPPING)\n"
 "      // transform unnormalized eye direction into tangent space\n"
 "      vec3 eyeminusvertex = EyePosition - gl_Vertex.xyz;\n"
-"      EyeVector.x = dot(eyeminusvertex, gl_MultiTexCoord1.xyz);\n"
-"      EyeVector.y = dot(eyeminusvertex, gl_MultiTexCoord2.xyz);\n"
+"      EyeVector.x = -dot(eyeminusvertex, gl_MultiTexCoord1.xyz);\n"
+"      EyeVector.y = -dot(eyeminusvertex, gl_MultiTexCoord2.xyz);\n"
 "      EyeVector.z = -dot(eyeminusvertex, gl_MultiTexCoord3.xyz);\n"
 "#endif\n"
 "\n"