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fix creation of NaN that invalidates the view frustum

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This commit is contained in:
wmayer
2017-05-12 08:05:12 +02:00
parent 736cd735ca
commit 22473ae4a8
1 changed files with 15 additions and 8 deletions
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23
src/Mod/Sketcher/Gui/ViewProviderSketch.cpp
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@@ -3922,14 +3922,21 @@ void ViewProviderSketch::draw(bool temp /*=false*/, bool rebuildinformationlayer
edit->RootCrossSet->numVertices.set1Value(0,2);
edit->RootCrossSet->numVertices.set1Value(1,2);
float MiX = -exp(ceil(log(std::abs(MinX))));
MiX = std::min(MiX,(float)-exp(ceil(log(std::abs(0.1f*MaxX)))));
float MaX = exp(ceil(log(std::abs(MaxX))));
MaX = std::max(MaX,(float)exp(ceil(log(std::abs(0.1f*MinX)))));
float MiY = -exp(ceil(log(std::abs(MinY))));
MiY = std::min(MiY,(float)-exp(ceil(log(std::abs(0.1f*MaxY)))));
float MaY = exp(ceil(log(std::abs(MaxY))));
MaY = std::max(MaY,(float)exp(ceil(log(std::abs(0.1f*MinY)))));
// make sure that nine of the numbers are exactly zero because log(0)
// is not defined
float xMin = std::abs(MinX) < FLT_EPSILON ? 0.01f : MinX;
float xMax = std::abs(MaxX) < FLT_EPSILON ? 0.01f : MaxX;
float yMin = std::abs(MinY) < FLT_EPSILON ? 0.01f : MinY;
float yMax = std::abs(MaxY) < FLT_EPSILON ? 0.01f : MaxY;
float MiX = -exp(ceil(log(std::abs(xMin))));
MiX = std::min(MiX,(float)-exp(ceil(log(std::abs(0.1f*xMax)))));
float MaX = exp(ceil(log(std::abs(xMax))));
MaX = std::max(MaX,(float)exp(ceil(log(std::abs(0.1f*xMin)))));
float MiY = -exp(ceil(log(std::abs(yMin))));
MiY = std::min(MiY,(float)-exp(ceil(log(std::abs(0.1f*yMax)))));
float MaY = exp(ceil(log(std::abs(yMax))));
MaY = std::max(MaY,(float)exp(ceil(log(std::abs(0.1f*yMin)))));
edit->RootCrossCoordinate->point.set1Value(0,SbVec3f(MiX, 0.0f, zCross));
edit->RootCrossCoordinate->point.set1Value(1,SbVec3f(MaX, 0.0f, zCross));