Make shader twosided

uwewoessner · uwewoessner · commit 6d10681b8d74 · 2026-04-01T22:07:13.000+02:00
diff --git a/share/covise/materials/Bump.xml b/share/covise/materials/Bump.xml
@@ -51,6 +51,9 @@ vec4 diffuseColor = texture2D( diffuseMap, Texcoord ) ;
       vec3 L = normalize(lightDir);
       	
       float lambertTerm = dot(N,L);
+
+      if(lambertTerm &lt; 0.0)
+        lambertTerm = -lambertTerm;
       	
       if(lambertTerm &gt; 0.0)
       {
@@ -72,6 +75,8 @@ else
       	               gl_FrontMaterial.specular * 
       				   specular;	
       	}
+else
+
       if(diffuseColor.a &lt; 0.5)
 	  {
 	      discard;
diff --git a/share/covise/materials/BumpAlpha.xml b/share/covise/materials/BumpAlpha.xml
@@ -55,6 +55,8 @@ gl_ClipVertex = gl_ModelViewMatrix*gl_Vertex;
       vec3 L = normalize(lightDir);
       	
       float lambertTerm = dot(N,L);
+      if(lambertTerm &lt; 0.0)
+        lambertTerm = -lambertTerm;
       	
       if(lambertTerm &gt; 0.0)
       {
diff --git a/share/covise/materials/BumpDiffuseLight.xml b/share/covise/materials/BumpDiffuseLight.xml
@@ -70,6 +70,8 @@ gl_ClipVertex = gl_ModelViewMatrix*gl_Vertex;
       vec3 L = normalize(lightDir);
       	
       float lambertTerm = dot(N,L);
+      if(lambertTerm &lt; 0.0)
+        lambertTerm = -lambertTerm;
       	
       if(lambertTerm > 0.0)
       {
diff --git a/share/covise/materials/BumpDiffuseLightBrightness.xml b/share/covise/materials/BumpDiffuseLightBrightness.xml
@@ -75,6 +75,8 @@ gl_ClipVertex = gl_ModelViewMatrix*gl_Vertex;
       vec3 L = normalize(lightDir);
       	
       float lambertTerm = dot(N,L);
+      if(lambertTerm &lt; 0.0)
+        lambertTerm = -lambertTerm;
       	
       if(lambertTerm > 0.0)
       {

Original file line number	Diff line number	Diff line change
`@@ -51,6 +51,9 @@ vec4 diffuseColor = texture2D( diffuseMap, Texcoord ) ;`
`51`	`51`	`vec3 L = normalize(lightDir);`
`52`	`52`
`53`	`53`	`float lambertTerm = dot(N,L);`
	`54`	`+`
	`55`	`+ if(lambertTerm < 0.0)`
	`56`	`+ lambertTerm = -lambertTerm;`
`54`	`57`
`55`	`58`	`if(lambertTerm > 0.0)`
`56`	`59`	`{`
`@@ -72,6 +75,8 @@ else`
`72`	`75`	`gl_FrontMaterial.specular *`
`73`	`76`	`specular;`
`74`	`77`	`}`
	`78`	`+else`
	`79`	`+`
`75`	`80`	`if(diffuseColor.a < 0.5)`
`76`	`81`	`{`
`77`	`82`	`discard;`
Original file line number	Diff line number	Diff line change
`@@ -55,6 +55,8 @@ gl_ClipVertex = gl_ModelViewMatrix*gl_Vertex;`
`55`	`55`	`vec3 L = normalize(lightDir);`
`56`	`56`
`57`	`57`	`float lambertTerm = dot(N,L);`
	`58`	`+ if(lambertTerm < 0.0)`
	`59`	`+ lambertTerm = -lambertTerm;`
`58`	`60`
`59`	`61`	`if(lambertTerm > 0.0)`
`60`	`62`	`{`
Original file line number	Diff line number	Diff line change
`@@ -70,6 +70,8 @@ gl_ClipVertex = gl_ModelViewMatrix*gl_Vertex;`
`70`	`70`	`vec3 L = normalize(lightDir);`
`71`	`71`
`72`	`72`	`float lambertTerm = dot(N,L);`
	`73`	`+ if(lambertTerm < 0.0)`
	`74`	`+ lambertTerm = -lambertTerm;`
`73`	`75`
`74`	`76`	`if(lambertTerm > 0.0)`
`75`	`77`	`{`
Original file line number	Diff line number	Diff line change
`@@ -75,6 +75,8 @@ gl_ClipVertex = gl_ModelViewMatrix*gl_Vertex;`
`75`	`75`	`vec3 L = normalize(lightDir);`
`76`	`76`
`77`	`77`	`float lambertTerm = dot(N,L);`
	`78`	`+ if(lambertTerm < 0.0)`
	`79`	`+ lambertTerm = -lambertTerm;`
`78`	`80`
`79`	`81`	`if(lambertTerm > 0.0)`
`80`	`82`	`{`