1 files changed, 86 insertions, 25 deletions

diff --git a/linden/indra/newview/app_settings/shaders/class1/deferred/sunLightF.glsl b/linden/indra/newview/app_settings/shaders/class1/deferred/sunLightF.glsl
index d43fe6c..22bdd2c 100644
--- a/linden/indra/newview/app_settings/shaders/class1/deferred/sunLightF.glsl
+++ b/linden/indra/newview/app_settings/shaders/class1/deferred/sunLightF.glsl
@@ -7,17 +7,21 @@
 
 #extension GL_ARB_texture_rectangle : enable
 
-uniform sampler2DRect positionMap;
-uniform sampler2DRect normalMap;
 uniform sampler2DRect depthMap;
-uniform sampler2DShadow shadowMap0;
-uniform sampler2DShadow shadowMap1;
-uniform sampler2DShadow shadowMap2;
-uniform sampler2DShadow shadowMap3;
+uniform sampler2DRect normalMap;
+uniform sampler2DRectShadow shadowMap0;
+uniform sampler2DRectShadow shadowMap1;
+uniform sampler2DRectShadow shadowMap2;
+uniform sampler2DRectShadow shadowMap3;
+uniform sampler2DRectShadow shadowMap4;
+uniform sampler2DRectShadow shadowMap5;
 uniform sampler2D noiseMap;
 
+uniform sampler2D               lightFunc;
+
+
 // Inputs
-uniform mat4 shadow_matrix[4];
+uniform mat4 shadow_matrix[6];
 uniform vec4 shadow_clip;
 uniform float ssao_radius;
 uniform float ssao_max_radius;
@@ -27,6 +31,25 @@ uniform float ssao_factor_inv;
 varying vec2 vary_fragcoord;
 varying vec4 vary_light;
 
+uniform mat4 inv_proj;
+uniform vec2 screen_res;
+
+uniform float shadow_bias;
+uniform float shadow_offset;
+
+vec4 getPosition(vec2 pos_screen)
+{
+        float depth = texture2DRect(depthMap, pos_screen.xy).a;
+        vec2 sc = pos_screen.xy*2.0;
+        sc /= screen_res;
+        sc -= vec2(1.0,1.0);
+        vec4 ndc = vec4(sc.x, sc.y, 2.0*depth-1.0, 1.0);
+        vec4 pos = inv_proj * ndc;
+        pos /= pos.w;
+        pos.w = 1.0;
+        return pos;
+}
+
 //calculate decreases in ambient lighting when crowded out (SSAO)
 float calcAmbientOcclusion(vec4 pos, vec3 norm)
 {
@@ -54,7 +77,7 @@ float calcAmbientOcclusion(vec4 pos, vec3 norm)
         for (int i = 0; i < 8; i++)
         {
                 vec2 samppos_screen = pos_screen + scale * reflect(kern[i], noise_reflect);
-                vec3 samppos_world = texture2DRect(positionMap, samppos_screen).xyz;
+                vec3 samppos_world = getPosition(samppos_screen).xyz; 
                 
                 vec3 diff = pos_world - samppos_world;
                 float dist2 = dot(diff, diff);
@@ -74,14 +97,18 @@ float calcAmbientOcclusion(vec4 pos, vec3 norm)
         
         angle_hidden = min(ssao_factor*angle_hidden/float(points), 1.0);
         
-        return 1.0 - (float(points != 0) * angle_hidden);
+        return (1.0 - (float(points != 0) * angle_hidden));
 }
 
 void main() 
 {
         vec2 pos_screen = vary_fragcoord.xy;
-        vec4 pos = vec4(texture2DRect(positionMap, pos_screen).xyz, 1.0);
-        vec3 norm = texture2DRect(normalMap, pos_screen).xyz;
+        
+        //try doing an unproject here
+        
+        vec4 pos = getPosition(pos_screen);
+        
+    vec3 norm = texture2DRect(normalMap, pos_screen).xyz*2.0-1.0;
         
         /*if (pos.z == 0.0) // do nothing for sky *FIX: REMOVE THIS IF/WHEN THE POSITION MAP IS BEING USED AS A STENCIL
         {
@@ -90,35 +117,45 @@ void main()
         }*/
         
         float shadow = 1.0;
-        float dp_directional_light = max(0.0, dot(norm, vary_light.xyz));
+    float dp_directional_light = max(0.0, dot(norm, vary_light.xyz));
 
+        vec4 spos = vec4(pos.xyz + norm.xyz * (-pos.z/64.0*shadow_offset+shadow_bias), 1.0);
+        
+        //vec3 debug = vec3(0,0,0);
+        
         if (dp_directional_light == 0.0)
         {
                 // if we know this point is facing away from the sun then we know it's in shadow without having to do a squirrelly shadow-map lookup
                 shadow = 0.0;
         }
-        else if (pos.z > -shadow_clip.w)
+        else if (spos.z > -shadow_clip.w)
         {       
-                if (pos.z < -shadow_clip.z)
+                vec4 lpos;
+                
+                if (spos.z < -shadow_clip.z)
                 {
-                        vec4 lpos = shadow_matrix[3]*pos;
-                        shadow = shadow2DProj(shadowMap3, lpos).x;
+                        lpos = shadow_matrix[3]*spos;
+                        lpos.xy *= screen_res;
+                        shadow = shadow2DRectProj(shadowMap3, lpos).x;
                         shadow += max((pos.z+shadow_clip.z)/(shadow_clip.z-shadow_clip.w)*2.0-1.0, 0.0);
                 }
-                else if (pos.z < -shadow_clip.y)
+                else if (spos.z < -shadow_clip.y)
                 {
-                        vec4 lpos = shadow_matrix[2]*pos;
-                        shadow = shadow2DProj(shadowMap2, lpos).x;
+                        lpos = shadow_matrix[2]*spos;
+                        lpos.xy *= screen_res;
+                        shadow = shadow2DRectProj(shadowMap2, lpos).x;
                 }
-                else if (pos.z < -shadow_clip.x)
+                else if (spos.z < -shadow_clip.x)
                 {
-                        vec4 lpos = shadow_matrix[1]*pos;
-                        shadow = shadow2DProj(shadowMap1, lpos).x;
+                        lpos = shadow_matrix[1]*spos;
+                        lpos.xy *= screen_res;
+                        shadow = shadow2DRectProj(shadowMap1, lpos).x;
                 }
                 else
                 {
-                        vec4 lpos = shadow_matrix[0]*pos;
-                        shadow = shadow2DProj(shadowMap0, lpos).x;
+                        lpos = shadow_matrix[0]*spos;
+                        lpos.xy *= screen_res;
+                        shadow = shadow2DRectProj(shadowMap0, lpos).x;
                 }
 
                 // take the most-shadowed value out of these two:
@@ -126,6 +163,17 @@ void main()
                 //  * an unblurred dot product between the sun and this norm
                 // the goal is to err on the side of most-shadow to fill-in shadow holes and reduce artifacting
                 shadow = min(shadow, dp_directional_light);
+                
+                /*debug.r = lpos.y / (lpos.w*screen_res.y);
+                
+                lpos.xy /= lpos.w*32.0;
+                if (fract(lpos.x) < 0.1 || fract(lpos.y) < 0.1)
+                {
+                        debug.gb = vec2(0.5, 0.5);
+                }
+                
+                debug += (1.0-shadow)*0.5;*/
+                
         }
         else
         {
@@ -135,5 +183,18 @@ void main()
         
         gl_FragColor[0] = shadow;
         gl_FragColor[1] = calcAmbientOcclusion(pos, norm);
-        //gl_FragColor[2] is unused as of August 2008, may be used for debugging
+        
+        //spotlight shadow 1
+        vec4 lpos = shadow_matrix[4]*spos;
+        lpos.xy *= screen_res;
+        gl_FragColor[2] = shadow2DRectProj(shadowMap4, lpos).x; 
+        
+        //spotlight shadow 2
+        lpos = shadow_matrix[5]*spos;
+        lpos.xy *= screen_res;
+        gl_FragColor[3] = shadow2DRectProj(shadowMap5, lpos).x; 
+
+        //gl_FragColor.rgb = pos.xyz;
+        //gl_FragColor.b = shadow;
+        //gl_FragColor.rgb = debug;
 }