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fix(imagereslicemapper): be less sensitive for "snapping" to nearest … #3159

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Merged
merged 1 commit into from
Oct 29, 2024
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fix(imagereslicemapper): be less sensitive for "snapping" to nearest … #3159

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6 changes: 5 additions & 1 deletion Sources/Rendering/OpenGL/ImageResliceMapper/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -1131,14 +1131,18 @@ function vtkOpenGLImageResliceMapper(publicAPI, model) {
shaders.Fragment = FSSource;
};

/**
* Returns true if the normal is almost axis aligned.
* Has a side effect to normalize the vector.
*/
function isVectorAxisAligned(n) {
vtkMath.normalize(n);
const tmpN = [0, 0, 0];
for (let i = 0; i < 3; ++i) {
vec3.zero(tmpN);
tmpN[i] = 1.0;
const dotP = vtkMath.dot(n, tmpN);
if (dotP < -0.999 || dotP > 0.999) {
if (dotP < -0.999999 || dotP > 0.999999) {
return [true, i];
}
}
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