removed getElementXD() and getElementXDNormalized() from core GLSL headers...

removed getElementXD() and getElementXDNormalized() from core GLSL headers since the same functionality is directly provided by GLSL with texture() and texelFetch() in a much cleaner way.

application/glsl/datacontainerinspector.frag

@@ -60,17 +60,17 @@ void main() {
             // perform MIP
             out_Color = vec4(0.0);
             for (float slice = 0.0; slice < 1.0; slice += _3dTextureParams._sizeRCP.z) {
-                out_Color = max(out_Color, lookupTF(_transferFunction, _transferFunctionParams, getElement3DNormalized(_texture3d, _3dTextureParams, vec3(ex_TexCoord.xy, slice)).r));
+                out_Color = max(out_Color, lookupTF(_transferFunction, _transferFunctionParams, texture(_texture3d, vec3(ex_TexCoord.xy, slice)).r));
             }
         }
         else {
             // render the corresponding slice
             vec3 coord = vec3(ex_TexCoord.xy, (_sliceNumber + 0.5) / (_3dTextureParams._size.z));
-            out_Color = lookupTF(_transferFunction, _transferFunctionParams, getElement3DNormalized(_texture3d, _3dTextureParams, coord).r);
+            out_Color = lookupTF(_transferFunction, _transferFunctionParams, texture(_texture3d, coord).r);
         }
     }
     else {
-        vec4 texel = getElement2DNormalized(_texture2d, _2dTextureParams, ex_TexCoord.xy);
+        vec4 texel = texture(_texture2d, ex_TexCoord.xy);
         if (_2dTextureParams._numChannels == 1) {
             out_Color = lookupTF(_transferFunction, _transferFunctionParams, texel.r);
         }

core/glsl/copyimage.frag

@@ -42,9 +42,9 @@ uniform sampler2D _depthTexture;
 
 void main() {
     vec2 fragCoord = gl_FragCoord.xy * _viewportSizeRCP;
-    out_Color = getElement2DNormalized(_colorTexture, _texParams, fragCoord);
+    out_Color = texture(_colorTexture, fragCoord);
 
 #ifndef NO_DEPTH
-    gl_FragDepth = getElement2DNormalized(_depthTexture, _texParams, fragCoord).r;
+    gl_FragDepth = texture(_depthTexture, fragCoord).r;
 #endif
 }

core/glsl/tools/gradient.frag

@@ -182,4 +182,4 @@ vec3 computeGradientSobel(in sampler3D tex, in vec3 texCoords) {
     sobel.z += value; 
    
     return -sobelScale * sobel;
-}
\ No newline at end of file
+}

core/glsl/tools/masking.frag

@@ -35,7 +35,7 @@ uniform TextureParameters2D _maskTexParams;
 uniform vec4 _maskColor;        ///< mask color
 
 #define MASKING_PROLOG(COORDS) \
-    vec4 maskValue = getElement2DNormalized(_maskImage, _maskTexParams, (COORDS) ); \
+    vec4 maskValue = texture(_maskImage, (COORDS) ); \
     if (distance(maskValue, _maskColor) > 0.01) {
 
 #define MASKING_EPILOG \

core/glsl/tools/texture2d.frag

@@ -34,28 +34,3 @@ struct TextureParameters2D {
     vec2 _sizeRCP;
     int _numChannels;
 };
-
-/**
- * Texture lookup function for 2D textures using pixel coordinates, i.e [(0,0) , textureSize].
- * \param	tex			Sampler to texture
- * \param	texParams   TextureParameters2D struct with texture for lookup
- * \param	texCoords	Lookup coordinates in pixel coordinates
- * \return	The texel at the given coordinates.
- */
-vec4 getElement2D(in sampler2D tex, in TextureParameters2D texParams, in vec2 texCoords) {
-    vec2 texCoordsNormalized = texCoords * texParams._sizeRCP;
-    //vec2 texCoordsTransformed = (texParams.matrix_ * vec4(texCoordsNormalized, 0.0, 1.0)).xy;
-    return texture(tex, texCoordsNormalized);
-}
-
-/**
- * Texture lookup function for 2D textures using normalized texture coordinates, i.e. [0,1].
- * \param	tex			Sampler to texture
- * \param	texParams   TextureParameters2D struct with texture for lookup
- * \param	texCoords	Lookup coordinates in normlized texture coordinates
- * \return	The texel at the given coordinates.
- */
-vec4 getElement2DNormalized(in sampler2D tex, in TextureParameters2D texParams, in vec2 texCoords) {
-    //vec2 texCoordsTransformed = (texParams.matrix_ * vec4(texCoords, 0.0, 1.0)).xy;
-    return texture(tex, texCoords);
-}

core/glsl/tools/texture3d.frag

@@ -48,31 +48,6 @@ struct TextureParameters3D {
     vec2 _realWorldMapping;
 };
 
-/**
- * Texture lookup function for 3D textures using voxel coordinates, i.e [(0,0) , textureSize].
- * \param	tex			Sampler to texture
- * \param	texParams   TextureParameters3D struct with texture for lookup
- * \param	texCoords	Lookup coordinates in pixel coordinates
- * \return	The texel at the given coordinates.
- */
-vec4 getElement3D(in sampler3D tex, in TextureParameters3D texParams, in vec3 texCoords) {
-    vec3 texCoordsNormalized = texCoords * texParams._sizeRCP;
-    //vec2 texCoordsTransformed = (texParams.matrix_ * vec4(texCoordsNormalized, 0.0, 1.0)).xy;
-    return texture(tex, texCoordsNormalized);
-}
-
-/**
- * Texture lookup function for 3D textures using normalized texture coordinates, i.e. [0,1].
- * \param	tex			Sampler to texture
- * \param	texParams   TextureParameters3D struct with texture for lookup
- * \param	texCoords	Lookup coordinates in normlized texture coordinates
- * \return	The texel at the given coordinates.
- */
-vec4 getElement3DNormalized(in sampler3D tex, in TextureParameters3D texParams, in vec3 texCoords) {
-    //vec2 texCoordsTransformed = (texParams.matrix_ * vec4(texCoords, 0.0, 1.0)).xy;
-    return texture(tex, texCoords);
-}
-
 /**
  * Transforms texture coordinates for texture \a tex to world coordinates using the texture's
  * texture-to-world matrix.

modules/advancedusvis/glsl/advancedusfusion.frag

@@ -38,11 +38,11 @@ out vec4 out_Color;
 #ifdef USE_3D_TEX
 #define SAMPLER_TYPE sampler3D
 #define TEXPARAMS_TYPE TextureParameters3D
-#define TEXTURE_LOOKUP_FUNC getElement3DNormalized
+#define TEXTURE_LOOKUP_FUNC texture
 #else
 #define SAMPLER_TYPE sampler2D
 #define TEXPARAMS_TYPE TextureParameters2D
-#define TEXTURE_LOOKUP_FUNC getElement2DNormalized
+#define TEXTURE_LOOKUP_FUNC texture
 #endif
 
 uniform SAMPLER_TYPE _usImage;
@@ -73,9 +73,9 @@ void main() {
     vec2 texCoord = ex_TexCoord.xy;
 #endif
 
-    vec4 texel = TEXTURE_LOOKUP_FUNC(_usImage, _usTextureParams, texCoord);
-    vec4 blurred = TEXTURE_LOOKUP_FUNC(_blurredImage, _blurredTextureParams, texCoord) * _blurredScale;
-    float confidence = clamp(TEXTURE_LOOKUP_FUNC(_confidenceMap, _confidenceTextureParams, texCoord).r * _confidenceScaling, 0.0, 1.0);
+    vec4 texel = TEXTURE_LOOKUP_FUNC(_usImage, texCoord);
+    vec4 blurred = TEXTURE_LOOKUP_FUNC(_blurredImage, texCoord) * _blurredScale;
+    float confidence = clamp(TEXTURE_LOOKUP_FUNC(_confidenceMap, texCoord).r * _confidenceScaling, 0.0, 1.0);
     float uncertainty = lookupTF(_confidenceTF, _confidenceTFParams, confidence).a;
 
     if (confidence <= 0.0) {

modules/columbia/glsl/geometrystrainrenderer.frag

@@ -47,12 +47,12 @@ void main() {
 
     vec3 worldCoords = ex_Position.xyz / ex_Position.z;
     vec3 texCoords = worldToTexture(_textureParameters, worldCoords);
-    out_Color = getElement3DNormalized(_strainTexture, _textureParameters, texCoords);
+    out_Color = texture(_strainTexture, texCoords);
 
     while (length(out_Color) == 0.0) {
         worldCoords -= normalize(ex_TexCoord) * 0.1;
         texCoords = worldToTexture(_textureParameters, worldCoords);
-        out_Color = getElement3DNormalized(_strainTexture, _textureParameters, texCoords);
+        out_Color = texture(_strainTexture, texCoords);
     }
 
 #ifdef ENABLE_SHADING

modules/columbia/glsl/strainraycaster.frag

@@ -94,7 +94,7 @@ vec4 performRaycasting(in vec3 entryPoint, in vec3 exitPoint, in vec2 texCoords)
         vec3 samplePosition = entryPoint.rgb + t * direction;
 
         // lookup intensity and TF
-        vec4 strain = getElement3DNormalized(_volume, _volumeTextureParams, samplePosition);
+        vec4 strain = texture(_volume, samplePosition);
         vec4 color = (_volumeTextureParams._numChannels == 4) ? strain : vec4(strain.xyz, 0.0);
         color.a = clamp(length(strain.xyz)/1.0, 0.0, 1.0);
 
@@ -114,7 +114,7 @@ vec4 performRaycasting(in vec3 entryPoint, in vec3 exitPoint, in vec2 texCoords)
                     vec3 newSamplePosition = entryPoint.rgb + newT * direction;
 
                     // lookup refined intensity + TF
-                    vec4 newStrain = getElement3DNormalized(_volume, _volumeTextureParams, newSamplePosition);
+                    vec4 newStrain = texture(_volume, newSamplePosition);
                     vec4 newColor = (_volumeTextureParams._numChannels == 4) ? newStrain : vec4(newStrain.xyz, 0.0);
                     newColor.a = clamp(length(newColor.xyz)/1.0, 0.0, 1.0);
 
@@ -168,8 +168,8 @@ vec4 performRaycasting(in vec3 entryPoint, in vec3 exitPoint, in vec2 texCoords)
     // calculate depth value from ray parameter
     gl_FragDepth = 1.0;
     if (firstHitT >= 0.0) {
-        float depthEntry = getElement2DNormalized(_entryPointsDepth, _entryParams, texCoords).z;
-        float depthExit = getElement2DNormalized(_exitPointsDepth, _exitParams, texCoords).z;
+        float depthEntry = texture(_entryPointsDepth, texCoords).z;
+        float depthExit = texture(_exitPointsDepth, texCoords).z;
         gl_FragDepth = calculateDepthValue(firstHitT/tend, depthEntry, depthExit);
     }
     return result;
@@ -180,8 +180,8 @@ vec4 performRaycasting(in vec3 entryPoint, in vec3 exitPoint, in vec2 texCoords)
  ***/
 void main() {
     vec2 p = gl_FragCoord.xy * _viewportSizeRCP;
-    vec3 frontPos = getElement2DNormalized(_entryPoints, _entryParams, p).rgb;
-    vec3 backPos = getElement2DNormalized(_exitPoints, _exitParams, p).rgb;
+    vec3 frontPos = texture(_entryPoints, p).rgb;
+    vec3 backPos = texture(_exitPoints, p).rgb;
 
     //determine whether the ray has to be casted
     if (frontPos == backPos) {

modules/ixpv/glsl/ixpvcompositor.frag

@@ -52,13 +52,13 @@ uniform TextureParameters2D _drrClippedTexParams;
  ***/
 void main() {
     // fetch input textures
-    vec4 xRayColor = getElement2DNormalized(_xRayColor, _xRayTexParams, ex_TexCoord.xy);
-    float xRayDepth = getElement2DNormalized(_xRayDepth, _xRayTexParams, ex_TexCoord.xy).r;
-    vec4 sliceColor = getElement2DNormalized(_sliceColor, _sliceTexParams, ex_TexCoord.xy);
-    float sliceDepth = getElement2DNormalized(_sliceDepth, _sliceTexParams, ex_TexCoord.xy).r;
+    vec4 xRayColor = texture(_xRayColor, ex_TexCoord.xy);
+    float xRayDepth = texture(_xRayDepth, ex_TexCoord.xy).r;
+    vec4 sliceColor = texture(_sliceColor, ex_TexCoord.xy);
+    float sliceDepth = texture(_sliceDepth, ex_TexCoord.xy).r;
     
-    float drrFull = getElement2DNormalized(_drrFullColor, _drrFullTexParams, ex_TexCoord.xy).r;
-    float drrClipped = getElement2DNormalized(_drrClippedColor, _drrClippedTexParams, ex_TexCoord.xy).r;
+    float drrFull = texture(_drrFullColor, ex_TexCoord.xy).r;
+    float drrClipped = texture(_drrClippedColor, ex_TexCoord.xy).r;
     
     float weightingFactor = 0.0;
     if (drrClipped > 0)

modules/scr_msk/glsl/trackedussweepframerenderer3d.frag

@@ -44,7 +44,7 @@ void main() {
         out_Color = vec4(1.0);
     }
     else  {
-        float intensity = getElement2DNormalized(_texture, _textureParameters, ex_TexCoord.xy).a;
+        float intensity = texture(_texture, ex_TexCoord.xy).a;
         out_Color = lookupTF(_transferFunction, _transferFunctionParams, intensity);
 
         // don't write fragment if fully transparent (in particular don't write to depth buffer!)

modules/vis/glsl/depthdarkening.frag

@@ -89,7 +89,7 @@ float applyDepthGaussFilter(in vec2 texCoord) {
     for (int i = -_halfKernelDimension; i <= _halfKernelDimension; ++i) {
         // TODO: why the fuck does abs(i) not work here?!?
         int absi = (i < 0) ? -i : i;
-        float curDepth = getElement2DNormalized(_depthPass2Texture, _pass2TexParams, texCoord + (_direction * _viewportSizeRCP * i)).r;
+        float curDepth = texture(_depthPass2Texture, texCoord + (_direction * _viewportSizeRCP * i)).r;
         result += curDepth * _gaussKernel[absi];
     }
     result /= _norm;
@@ -110,11 +110,11 @@ void main() {
         gl_FragDepth = filteredDepth;
     } else {
         // we are in the second vertical pass and have to modulate the color
-        float curDepth = getElement2DNormalized(_depthTexture, _texParams, texCoord).r;
+        float curDepth = texture(_depthTexture, texCoord).r;
         float deltaD = normalizeDepth(filteredDepth) - normalizeDepth(curDepth);
 
         // apply depth darkening
-        vec4 curColor = getElement2DNormalized(_colorTexture, _texParams, texCoord);
+        vec4 curColor = texture(_colorTexture, texCoord);
         if (curColor.a == 0)
             discard;
 

modules/vis/glsl/drrraycaster.frag

@@ -79,7 +79,7 @@ vec4 raycastDRR(in vec3 entryPoint, in vec3 exitPoint) {
         vec3 samplePosition = entryPoint.rgb + t * direction;
 
         // lookup intensity and TF
-        float intensity = getElement3DNormalized(_volume, _volumeTextureParams, samplePosition).r;
+        float intensity = texture(_volume, samplePosition).r;
         vec4 color = lookupTF(_transferFunction, _transferFunctionParams, intensity);
 
 #ifdef DEPTH_MAPPING
@@ -130,8 +130,8 @@ vec4 raycastDRR(in vec3 entryPoint, in vec3 exitPoint) {
  ***/
 void main() {
     vec2 p = gl_FragCoord.xy * _viewportSizeRCP;
-    vec3 frontPos = getElement2DNormalized(_entryPoints, _entryParams, p).rgb;
-    vec3 backPos = getElement2DNormalized(_exitPoints, _exitParams, p).rgb;
+    vec3 frontPos = texture(_entryPoints, p).rgb;
+    vec3 backPos = texture(_exitPoints, p).rgb;
 
     //determine whether the ray has to be casted
     if (frontPos == backPos) {

modules/vis/glsl/eepgenerator.frag

@@ -57,7 +57,7 @@ void main() {
     float fragDepth = gl_FragCoord.z;
 
     if (_integrateGeometry) {
-        float geometryDepth = getElement2DNormalized(_geometryDepthTexture, _geometryDepthTexParams, fragCoordNormalized).r;
+        float geometryDepth = texture(_geometryDepthTexture, fragCoordNormalized).r;
 
         if (_isEntrypoint) {
             // integrating geometry into Entrypoints
@@ -76,7 +76,7 @@ void main() {
         }
         else {
             // integrating geometry into Exitpoints
-            float entryDepth = getElement2DNormalized(_entryDepthTexture, _entryDepthTexParams, fragCoordNormalized).r;
+            float entryDepth = texture(_entryDepthTexture, fragCoordNormalized).r;
             float exitDepth = gl_FragCoord.z;
 
             if (geometryDepth <= entryDepth) {

modules/vis/glsl/optimizedraycaster.frag

@@ -153,7 +153,7 @@ vec4 performRaycasting(in vec3 entryPoint, in vec3 exitPoint, in vec2 texCoords)
         }
 
         // lookup intensity and TF
-        float intensity = getElement3DNormalized(_volume, _volumeTextureParams, samplePosition).r;
+        float intensity = texture(_volume, samplePosition).r;
         vec4 color = lookupTF(_transferFunction, _transferFunctionParams, intensity);
 
 #ifdef INTERSECTION_REFINEMENT
@@ -172,7 +172,7 @@ vec4 performRaycasting(in vec3 entryPoint, in vec3 exitPoint, in vec2 texCoords)
                     vec3 newSamplePosition = entryPoint.rgb + newT * direction;
 
                     // lookup refined intensity + TF
-                    float newIntensity = getElement3DNormalized(_volume, _volumeTextureParams, newSamplePosition).r;
+                    float newIntensity = texture(_volume, newSamplePosition).r;
                     vec4 newColor = lookupTF(_transferFunction, _transferFunctionParams, newIntensity);
 
                     if (newColor.a <= 0.0) {
@@ -225,8 +225,8 @@ vec4 performRaycasting(in vec3 entryPoint, in vec3 exitPoint, in vec2 texCoords)
     // calculate depth value from ray parameter
     gl_FragDepth = 1.0;
     if (firstHitT >= 0.0) {
-        float depthEntry = getElement2DNormalized(_entryPointsDepth, _entryParams, texCoords).z;
-        float depthExit = getElement2DNormalized(_exitPointsDepth, _exitParams, texCoords).z;
+        float depthEntry = texture(_entryPointsDepth, texCoords).z;
+        float depthExit = texture(_exitPointsDepth, texCoords).z;
         gl_FragDepth = calculateDepthValue(firstHitT/tend, depthEntry, depthExit);
     }
 
@@ -238,8 +238,8 @@ vec4 performRaycasting(in vec3 entryPoint, in vec3 exitPoint, in vec2 texCoords)
  ***/
 void main() {
     vec2 p = gl_FragCoord.xy * _viewportSizeRCP;
-    vec3 frontPos = getElement2DNormalized(_entryPoints, _entryParams, p).rgb;
-    vec3 backPos = getElement2DNormalized(_exitPoints, _exitParams, p).rgb;
+    vec3 frontPos = texture(_entryPoints, p).rgb;
+    vec3 backPos = texture(_exitPoints, p).rgb;
 
     //determine whether the ray has to be casted
     if (frontPos == backPos) {

modules/vis/glsl/quadview.frag

@@ -37,6 +37,6 @@ uniform sampler2D _depthTexture;
 uniform TextureParameters2D _texParams;
 
 void main() {
-    out_Color = getElement2DNormalized(_colorTexture, _texParams, ex_TexCoord.xy);
-    gl_FragDepth = getElement2DNormalized(_depthTexture, _texParams, ex_TexCoord.xy).r;
+    out_Color = texture(_colorTexture, ex_TexCoord.xy);
+    gl_FragDepth = texture(_depthTexture, ex_TexCoord.xy).r;
 }

modules/vis/glsl/rendertargetcompositor.frag

@@ -47,45 +47,45 @@ uniform float _alpha;
 void main() {
     if (_compositingMethod == 0) {
         // only first
-        out_Color = getElement2DNormalized(_firstColor, _firstTexParams, ex_TexCoord.xy);
-        gl_FragDepth = getElement2DNormalized(_firstDepth, _firstTexParams, ex_TexCoord.xy).r;
+        out_Color = texture(_firstColor, ex_TexCoord.xy);
+        gl_FragDepth = texture(_firstDepth, ex_TexCoord.xy).r;
     }
     else if (_compositingMethod == 1) {
         // only second
-        out_Color = getElement2DNormalized(_secondColor, _secondTexParams, ex_TexCoord.xy);
-        gl_FragDepth = getElement2DNormalized(_secondDepth, _secondTexParams, ex_TexCoord.xy).r;
+        out_Color = texture(_secondColor, ex_TexCoord.xy);
+        gl_FragDepth = texture(_secondDepth, ex_TexCoord.xy).r;
     }
     else if (_compositingMethod == 2) {
         // alpha blending
-        vec4 firstColor = getElement2DNormalized(_firstColor, _firstTexParams, ex_TexCoord.xy);
-        float firstDepth = getElement2DNormalized(_firstDepth, _firstTexParams, ex_TexCoord.xy).r;
-        vec4 secondColor = getElement2DNormalized(_secondColor, _secondTexParams, ex_TexCoord.xy);
-        float secondDepth = getElement2DNormalized(_secondDepth, _secondTexParams, ex_TexCoord.xy).r;
+        vec4 firstColor = texture(_firstColor, ex_TexCoord.xy);
+        float firstDepth = texture(_firstDepth, ex_TexCoord.xy).r;
+        vec4 secondColor = texture(_secondColor, ex_TexCoord.xy);
+        float secondDepth = texture(_secondDepth, ex_TexCoord.xy).r;
 
         out_Color = mix(firstColor, secondColor, _alpha);
         gl_FragDepth = min(firstDepth, secondDepth);
     }
     else if (_compositingMethod == 3) {
         // difference
-        vec4 firstColor = getElement2DNormalized(_firstColor, _firstTexParams, ex_TexCoord.xy);
-        float firstDepth = getElement2DNormalized(_firstDepth, _firstTexParams, ex_TexCoord.xy).r;
-        vec4 secondColor = getElement2DNormalized(_secondColor, _secondTexParams, ex_TexCoord.xy);
-        float secondDepth = getElement2DNormalized(_secondDepth, _secondTexParams, ex_TexCoord.xy).r;
+        vec4 firstColor = texture(_firstColor, ex_TexCoord.xy);
+        float firstDepth = texture(_firstDepth, ex_TexCoord.xy).r;
+        vec4 secondColor = texture(_secondColor, ex_TexCoord.xy);
+        float secondDepth = texture(_secondDepth, ex_TexCoord.xy).r;
 
         out_Color = vec4(vec3(1.0) - abs(firstColor - secondColor).xyz, max(firstColor.w, secondColor.w));
         gl_FragDepth = min(firstDepth, secondDepth);
     }
     else if (_compositingMethod == 4) {
         // depth test
-        float firstDepth = getElement2DNormalized(_firstDepth, _firstTexParams, ex_TexCoord.xy).r;
-        float secondDepth = getElement2DNormalized(_secondDepth, _secondTexParams, ex_TexCoord.xy).r;
+        float firstDepth = texture(_firstDepth, ex_TexCoord.xy).r;
+        float secondDepth = texture(_secondDepth, ex_TexCoord.xy).r;
 
         if (firstDepth > secondDepth) {
-            out_Color = getElement2DNormalized(_secondColor, _secondTexParams, ex_TexCoord.xy);
+            out_Color = texture(_secondColor, ex_TexCoord.xy);
             gl_FragDepth = secondDepth;
         }
         else {
-            out_Color = getElement2DNormalized(_firstColor, _firstTexParams, ex_TexCoord.xy);
+            out_Color = texture(_firstColor, ex_TexCoord.xy);
             gl_FragDepth = firstDepth;
         }
     }

modules/vis/glsl/simpleraycaster.frag

@@ -93,7 +93,7 @@ vec4 performRaycasting(in vec3 entryPoint, in vec3 exitPoint, in vec2 texCoords)
         vec3 samplePosition = entryPoint.rgb + t * direction;
 
         // lookup intensity and TF
-        float intensity = getElement3DNormalized(_volume, _volumeTextureParams, samplePosition).r;
+        float intensity = texture(_volume, samplePosition).r;
         vec4 color = lookupTF(_transferFunction, _transferFunctionParams, intensity);
 
 #ifdef ENABLE_SHADOWING
@@ -109,7 +109,7 @@ vec4 performRaycasting(in vec3 entryPoint, in vec3 exitPoint, in vec2 texCoords)
             // traverse ray from sample to light
             while (! finished) {
                 // grab intensity and TF opacity
-                intensity = getElement3DNormalized(_volume, _volumeTextureParams, position).r;
+                intensity = texture(_volume, position).r;
                 shadowFactor += lookupTF(_transferFunction, _transferFunctionParams, intensity).a;
 
                 position += L;
@@ -156,8 +156,8 @@ vec4 performRaycasting(in vec3 entryPoint, in vec3 exitPoint, in vec2 texCoords)
     // calculate depth value from ray parameter
     gl_FragDepth = 1.0;
     if (firstHitT >= 0.0) {
-        float depthEntry = getElement2DNormalized(_entryPointsDepth, _entryParams, texCoords).z;
-        float depthExit = getElement2DNormalized(_exitPointsDepth, _exitParams, texCoords).z;
+        float depthEntry = texture(_entryPointsDepth, texCoords).z;
+        float depthExit = texture(_exitPointsDepth, texCoords).z;
         gl_FragDepth = calculateDepthValue(firstHitT/tend, depthEntry, depthExit);
     }
     return result;
@@ -168,8 +168,8 @@ vec4 performRaycasting(in vec3 entryPoint, in vec3 exitPoint, in vec2 texCoords)
  ***/
 void main() {
     vec2 p = gl_FragCoord.xy * _viewportSizeRCP;
-    vec3 frontPos = getElement2DNormalized(_entryPoints, _entryParams, p).rgb;
-    vec3 backPos = getElement2DNormalized(_exitPoints, _exitParams, p).rgb;
+    vec3 frontPos = texture(_entryPoints, p).rgb;
+    vec3 backPos = texture(_exitPoints, p).rgb;
 
     //determine whether the ray has to be casted
     if (frontPos == backPos) {

modules/vis/glsl/sliceextractor.frag

@@ -47,7 +47,7 @@ uniform vec4 _color;
 
 void main() {
     if (_useTexturing) {
-        vec4 texel = getElement3DNormalized(_texture, _textureParams, (_texCoordsMatrix * vec4(ex_TexCoord, 1.0)).xyz);
+        vec4 texel = texture(_texture, (_texCoordsMatrix * vec4(ex_TexCoord, 1.0)).xyz);
 
         if (_textureParams._numChannels == 1) {
             out_Color = lookupTF(_transferFunction, _transferFunctionParams, texel.r);

modules/vis/glsl/slicerenderer3d.frag

@@ -40,7 +40,7 @@ uniform sampler1D _transferFunction;
 uniform TFParameters1D _transferFunctionParams;
 
 void main() {
-    float intensity = getElement3DNormalized(_texture, _textureParams, ex_TexCoord).r;
+    float intensity = texture(_texture, ex_TexCoord).r;
     out_Color = lookupTF(_transferFunction, _transferFunctionParams, intensity);
 
     // don't write fragment if fully transparent (in particular don't write to depth buffer!)