Source code
if(tid<c_ActiveVoxelNumber){
//Get the real world position in the source space
float4 realPosition = tex1Dfetch(positionFieldTexture,tid);
//Get the voxel-based position in the source space
float3 voxelPosition;
float4 matrix = tex1Dfetch(sourceMatrixTexture,0);
voxelPosition.x = matrix.x*realPosition.x + matrix.y*realPosition.y +
matrix.z*realPosition.z + matrix.w;
matrix = tex1Dfetch(sourceMatrixTexture,1);
voxelPosition.y = matrix.x*realPosition.x + matrix.y*realPosition.y +
matrix.z*realPosition.z + matrix.w;
matrix = tex1Dfetch(sourceMatrixTexture,2);
voxelPosition.z = matrix.x*realPosition.x + matrix.y*realPosition.y +
matrix.z*realPosition.z + matrix.w;
int3 sourceImageSize = c_SourceDim;
if( -1<voxelPosition.x && voxelPosition.x<=sourceImageSize.x &&
-1<voxelPosition.y && voxelPosition.y<=sourceImageSize.y &&
-1<voxelPosition.z && voxelPosition.z<=sourceImageSize.z){
float3 relativePosition;
relativePosition.x=(voxelPosition.x+0.5f)/(float)c_SourceDim.x;
relativePosition.y=(voxelPosition.y+0.5f)/(float)c_SourceDim.y;
relativePosition.z=(voxelPosition.z+0.5f)/(float)c_SourceDim.z;
resultArray[tex1Dfetch(maskTexture,tid)]=tex3D(sourceTexture, relativePosition.x, relativePosition.y, relativePosition.z);
}
else resultArray[tex1Dfetch(maskTexture,tid)]=c_PaddingValue;
}
}
Run 1
The code has reasonable structure and comments, but readability is hindered by inconsistent indentation, repeated matrix multiplication code, and somewhat unclear variable names. The nesting depth is moderate but acceptable. Intent is fairly clear - it transforms a position and samples a texture - but the repetitive matrix math makes it longer than necessary and obscures the transformation logic. Action granularity is mostly one action per line, though some assignments are split awkwardly. The reading flow is somewhat disrupted by the uneven indentation and repetitive code blocks. A helper function for the matrix-vector multiplication and consistent formatting would significantly improve readability.
Run 2
The code has a clear overall structure and logical flow, with comments explaining major steps. However, readability is hindered by several factors: inconsistent indentation and spacing, repetitive matrix-vector multiplication code that could be extracted into a helper function or loop, deeply nested conditional logic, and multiple operations on single lines. The boundary check conditions are complex and hard to parse quickly. Variable names are generally clear but could be more descriptive. The code could be significantly shorter and clearer with better abstraction of the transformation logic and cleaner conditional formatting.
Run 3
The code has some readability strengths, such as clear comments separating logical steps, descriptive variable names, and one action per line in many places. However, it suffers from several issues. The nesting is moderately deep with an if-else structure inside the main condition, and conditions are sometimes spread across multiple lines in confusing ways. The matrix transformation code is repetitive and could be extracted into a helper or loop. The boundary condition checking is unclear due to unusual comparison style (-1 < x && x <= size). Mixed tab/space indentation and inconsistent alignment make visual scanning difficult. The overall structure is logical but not cleanly organized, with some ambiguity in intent around the coordinate transformations and mask indexing. While concise enough, the code would benefit from refactoring the repetitive matrix operations, simplifying condition checks, and improving white space consistency.
Run 1
Code Structure: Logically organized into position retrieval, coordinate transformation, bounds checking, and sampling or padding. Nesting: Two conditional levels are manageable, though the outer guard adds indentation. Clarity of intent: Descriptive variable names and comments explain the coordinate conversion; boundary conventions and the mask-based output index are less obvious. Code length: Reasonably concise, but repeated matrix calculations could be encapsulated to reduce repetition. Action granularity: Most statements perform one action, although the output assignment combines index lookup, texture sampling, and storage. Reading flow: Operations follow a natural sequence, but inconsistent spacing, long expressions, the unbraced else, and an unmatched closing brace in the supplied snippet reduce readability.
Run 2
Code Structure: Logically separates coordinate transformation, bounds checking, and sampling or padding. Nesting: Two conditional levels are manageable, though the compact else statement weakens visual consistency. Clarity of intent: Descriptive variable names and comments explain the main steps; texture-based indexing and boundary conventions require domain knowledge. Code length: Reasonably concise, but repeated matrix calculations and normalization could be abstracted to reduce duplication. Action granularity: Most statements perform one action, although the final assignment combines index lookup, texture sampling, and storage. Reading flow: Execution follows a natural transformation-to-validation-to-output sequence, but inconsistent spacing, alignment, long expressions, and an unmatched closing brace in the supplied snippet reduce readability.
Run 3
Code Structure: Logically organized into position retrieval, coordinate transformation, bounds checking, and sampling or padding. Nesting: Only two conditional levels, keeping complexity manageable. Clarity of intent: Descriptive variable names and comments explain the coordinate conversions, though texture APIs, boundary conventions, and mask indexing require domain knowledge. Code length: Reasonably concise, but repeated matrix-row calculations and normalization could be abstracted for readability. Action granularity: Most statements perform one action; nested texture fetches in assignments slightly increase cognitive load. Reading flow: Processing follows a natural sequence, but inconsistent spacing, uneven alignment, the unbraced else, and an unmatched closing brace in the supplied snippet reduce polish and make scope less clear.