GLSL shader: make dp_waterscroll work with dp_reflect and dp_refract

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@10958 d7cf8633-e32d-0410-b094-e92efae38249

diff --git a/gl_rmain.c b/gl_rmain.c
index 5ea6bb048fe7471d0acdb10996a27ee9459628dc..f60e7e2b5fe4c911d58d4899dfbe50931845a020 100644 (file)
--- a/gl_rmain.c
+++ b/gl_rmain.c
@@ -2072,14 +2072,14 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
        r_waterstate_waterplane_t *waterplane = (r_waterstate_waterplane_t *)surfacewaterplane;
        if (rsurface.texture->currentmaterialflags & MATERIALFLAG_ALPHATEST)
                permutation |= SHADERPERMUTATION_ALPHAKILL;
+       if (rsurface.texture->r_water_waterscroll[0] && rsurface.texture->r_water_waterscroll[1])
+               permutation |= SHADERPERMUTATION_NORMALMAPSCROLLBLEND; // todo: make generic
        if (rsurfacepass == RSURFPASS_BACKGROUND)
        {
                // distorted background
                if (rsurface.texture->currentmaterialflags & MATERIALFLAG_WATERSHADER)
                {
                        mode = SHADERMODE_WATER;
-                       if (rsurface.texture->r_water_waterscroll[0] && rsurface.texture->r_water_waterscroll[1])
-                               permutation |= SHADERPERMUTATION_NORMALMAPSCROLLBLEND;
                        if((r_wateralpha.value < 1) && (rsurface.texture->currentmaterialflags & MATERIALFLAG_WATERALPHA))
                        {
                                // this is the right thing to do for wateralpha

diff --git a/shader_glsl.h b/shader_glsl.h
index 0d4d3b5fcee8d33d2441d6193401b6fbce5b2e0a..1b0c1b18311b528ed1aa54097f593bd9fe2b1d3f 100644 (file)
--- a/shader_glsl.h
+++ b/shader_glsl.h
@@ -355,13 +355,23 @@
 "uniform mediump vec4 ReflectColor;\n"
 "uniform mediump float ReflectFactor;\n"
 "uniform mediump float ReflectOffset;\n"
+"uniform highp float ClientTime;\n"
+"#ifdef USENORMALMAPSCROLLBLEND\n"
+"uniform highp vec2 NormalmapScrollBlend;\n"
+"#endif\n"
 "\n"
 "void main(void)\n"
 "{\n"
 "      vec2 ScreenScaleRefractReflectIW = ScreenScaleRefractReflect.xy * (1.0 / ModelViewProjectionPosition.w);\n"
 "      //vec2 ScreenTexCoord = (ModelViewProjectionPosition.xy + normalize(vec3(dp_texture2D(Texture_Normal, TexCoord)) - vec3(0.5)).xy * DistortScaleRefractReflect.xy * 100) * ScreenScaleRefractReflectIW + ScreenCenterRefractReflect.xy;\n"
 "      vec2 SafeScreenTexCoord = ModelViewProjectionPosition.xy * ScreenScaleRefractReflectIW + ScreenCenterRefractReflect.xy;\n"
-"      vec2 ScreenTexCoord = SafeScreenTexCoord + vec2(normalize(vec3(dp_texture2D(Texture_Normal, TexCoord)) - vec3(0.5))).xy * DistortScaleRefractReflect.xy;\n"
+"      #ifdef USENORMALMAPSCROLLBLEND\n"
+"              vec3 normal = dp_texture2D(Texture_Normal, (TexCoord + vec2(0.08, 0.08)*ClientTime*NormalmapScrollBlend.x*0.5)*NormalmapScrollBlend.y).rgb - vec3(1.0);\n"
+"              normal += dp_texture2D(Texture_Normal, (TexCoord + vec2(-0.06, -0.09)*ClientTime*NormalmapScrollBlend.x)*NormalmapScrollBlend.y*0.75).rgb;\n"
+"              vec2 ScreenTexCoord = SafeScreenTexCoord + vec3(normalize(myhalf3(normal))).xy * DistortScaleRefractReflect.zw;\n"
+"      #else\n"
+"              vec2 ScreenTexCoord = SafeScreenTexCoord + vec3(normalize(myhalf3(offsetMappedTexture2D(Texture_Normal)) - myhalf3(0.5))).xy * DistortScaleRefractReflect.zw;\n"
+"      #endif\n"
 "      // FIXME temporary hack to detect the case that the reflection\n"
 "      // gets blackened at edges due to leaving the area that contains actual\n"
 "      // content.\n"
@@ -1064,6 +1074,10 @@
 "uniform sampler3D Texture_BounceGrid;\n"
 "uniform float BounceGridIntensity;\n"
 "#endif\n"
+"uniform highp float ClientTime;\n"
+"#ifdef USENORMALMAPSCROLLBLEND\n"
+"uniform highp vec2 NormalmapScrollBlend;\n"
+"#endif\n"
 "void main(void)\n"
 "{\n"
 "#ifdef USEOFFSETMAPPING\n"
@@ -1072,8 +1086,10 @@
 "      vec2 dPdy = dp_offsetmapping_dFdy(TexCoordSurfaceLightmap.xy);\n"
 "      vec2 TexCoordOffset = OffsetMapping(TexCoordSurfaceLightmap.xy, dPdx, dPdy);\n"
 "# define offsetMappedTexture2D(t) dp_textureGrad(t, TexCoordOffset, dPdx, dPdy)\n"
+"# define TexCoord TexCoordOffset\n"
 "#else\n"
 "# define offsetMappedTexture2D(t) dp_texture2D(t, TexCoordSurfaceLightmap.xy)\n"
+"# define TexCoord TexCoordSurfaceLightmap.xy\n"
 "#endif\n"
 "\n"
 "      // combine the diffuse textures (base, pants, shirt)\n"
@@ -1281,7 +1297,13 @@
 "      vec4 ScreenScaleRefractReflectIW = ScreenScaleRefractReflect * (1.0 / ModelViewProjectionPosition.w);\n"
 "      //vec4 ScreenTexCoord = (ModelViewProjectionPosition.xyxy + normalize(myhalf3(offsetMappedTexture2D(Texture_Normal)) - myhalf3(0.5)).xyxy * DistortScaleRefractReflect * 100) * ScreenScaleRefractReflectIW + ScreenCenterRefractReflect;\n"
 "      vec2 SafeScreenTexCoord = ModelViewProjectionPosition.xy * ScreenScaleRefractReflectIW.zw + ScreenCenterRefractReflect.zw;\n"
-"      vec2 ScreenTexCoord = SafeScreenTexCoord + vec3(normalize(myhalf3(offsetMappedTexture2D(Texture_Normal)) - myhalf3(0.5))).xy * DistortScaleRefractReflect.zw;\n"
+"      #ifdef USENORMALMAPSCROLLBLEND\n"
+"              vec3 normal = dp_texture2D(Texture_Normal, (TexCoord + vec2(0.08, 0.08)*ClientTime*NormalmapScrollBlend.x*0.5)*NormalmapScrollBlend.y).rgb - vec3(1.0);\n"
+"              normal += dp_texture2D(Texture_Normal, (TexCoord + vec2(-0.06, -0.09)*ClientTime*NormalmapScrollBlend.x)*NormalmapScrollBlend.y*0.75).rgb;\n"
+"              vec2 ScreenTexCoord = SafeScreenTexCoord + vec3(normalize(myhalf3(normal))).xy * DistortScaleRefractReflect.zw;\n"
+"      #else\n"
+"              vec2 ScreenTexCoord = SafeScreenTexCoord + vec3(normalize(myhalf3(offsetMappedTexture2D(Texture_Normal)) - myhalf3(0.5))).xy * DistortScaleRefractReflect.zw;\n"
+"      #endif\n"
 "      // FIXME temporary hack to detect the case that the reflection\n"
 "      // gets blackened at edges due to leaving the area that contains actual\n"
 "      // content.\n"