Fix random buildings shader errors

Effects/building.eff

@@ -204,10 +204,13 @@
     <pass>
       <program>
         <vertex-shader>Shaders/building-ALS.vert</vertex-shader>
+        <vertex-shader>Shaders/shadows-include.vert</vertex-shader>
         <fragment-shader>Shaders/terrain-ALS-base.frag</fragment-shader>
         <fragment-shader>Shaders/hazes.frag</fragment-shader>
         <fragment-shader>Shaders/filters-ALS.frag</fragment-shader>
         <fragment-shader>Shaders/noise.frag</fragment-shader>
+        <fragment-shader>Shaders/shadows-include.frag</fragment-shader>
+        <fragment-shader>Shaders/clustered-include.frag</fragment-shader>
         <attribute>
 					<name>instancePosition</name>
 					<index>10</index>
@@ -235,9 +238,12 @@
 			</vertex-program-two-side>
 			<program n="0">
 				<vertex-shader n="1">Shaders/building-default.vert</vertex-shader>
+				<vertex-shader n="2">Shaders/shadows-include.vert</vertex-shader>
 				<fragment-shader n="0">Shaders/include_fog.frag</fragment-shader>
 				<!--fog include-->
 				<fragment-shader n="1">Shaders/default.frag</fragment-shader>
+				<fragment-shader n="2">Shaders/shadows-include.frag</fragment-shader>
+				<fragment-shader n="3">Shaders/clustered-include.frag</fragment-shader>
         <attribute>
           <name>instancePosition</name>
           <index>10</index>
@@ -338,9 +344,12 @@
 			</vertex-program-two-side>
 			<program n="0">
 				<vertex-shader n="0">Shaders/building-default.vert</vertex-shader>
+				<vertex-shader n="1">Shaders/shadows-include.vert</vertex-shader>
 				<fragment-shader n="0">Shaders/include_fog.frag</fragment-shader>
 				<!--fog include-->
 				<fragment-shader n="1">Shaders/default.frag</fragment-shader>
+				<fragment-shader n="2">Shaders/shadows-include.frag</fragment-shader>
+				<fragment-shader n="3">Shaders/clustered-include.frag</fragment-shader>
         <attribute>
 					<name>instancePosition</name>
 					<index>10</index>
@@ -382,6 +391,27 @@
 					<use>material/color-mode-uniform</use>
 				</value>
 			</uniform>
+            <!-- BEGIN shadows include -->
+			<uniform>
+			  <name>shadow_tex</name>
+			  <type>sampler-2d</type>
+			  <value type="int">10</value>
+			</uniform>
+			<uniform>
+			  <name>shadows_enabled</name>
+			  <type>bool</type>
+			  <value>
+				<use>shadows_enabled</use>
+			  </value>
+			</uniform>
+			<uniform>
+			  <name>sun_atlas_size</name>
+			  <type>int</type>
+			  <value>
+				<use>sun_atlas_size</use>
+			  </value>
+			</uniform>
+			<!-- END shadows include -->
 		</pass>
 	</technique>
 

Shaders/building-ALS.vert

@@ -28,6 +28,7 @@ attribute vec3 attrib2;
 varying vec4 diffuse_term;
 varying vec3 normal;
 varying vec3 relPos;
+varying vec4 ecPosition;
 
 //varying float earthShade;
 //varying float yprime;
@@ -55,6 +56,7 @@ const float terminator_width = 200000.0;
 float earthShade;
 //float mie_angle;
 
+void setupShadows(vec4 eyeSpacePos);
 
 float light_func (in float x, in float a, in float b, in float c, in float d, in float e)
 {
@@ -308,4 +310,7 @@ if (use_IR_vision)
     gl_FrontColor.rgb = constant_term.rgb;
     gl_BackColor.rgb = constant_term.rgb;
     //gl_FrontColor.a = mie_angle; gl_BackColor.a = mie_angle;
+
+    ecPosition = gl_ModelViewMatrix * vec4(position, 1.0);
+    setupShadows(ecPosition);
 }

Shaders/building-default.vert

@@ -24,6 +24,7 @@ attribute vec3 attrib2;
 // bugs with gl_FrontFacing in the fragment shader.
 varying vec4 diffuse_term;
 varying vec3 normal;
+varying vec4 ecPosition;
 
 uniform int colorMode;
 
@@ -33,6 +34,8 @@ uniform int colorMode;
 //void fog_Func(int type);
 /////////////////////////
 
+void setupShadows(vec4 eyeSpacePos);
+
 const float c_precision = 128.0;
 const float c_precisionp1 = c_precision + 1.0;
 
@@ -132,4 +135,6 @@ void main()
     gl_BackColor.rgb = constant_term.rgb; gl_BackColor.a = 0.0;
     //fogCoord = abs(ecPosition.z / ecPosition.w);
 		//fog_Func(fogType);
+    ecPosition = gl_ModelViewMatrix * vec4(position, 1.0);
+    setupShadows(ecPosition);
 }