38 lines
1.9 KiB
C++
38 lines
1.9 KiB
C++
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#include <openvdb/openvdb.h>
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#include <iostream>
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int main()
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{
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// Initialize the OpenVDB library. This must be called at least
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// once per program and may safely be called multiple times.
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openvdb::initialize();
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// Create an empty floating-point grid with background value 0.
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openvdb::FloatGrid::Ptr grid = openvdb::FloatGrid::create();
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std::cout << "Testing random access:" << std::endl;
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// Get an accessor for coordinate-based access to voxels.
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openvdb::FloatGrid::Accessor accessor = grid->getAccessor();
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// Define a coordinate with large signed indices.
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openvdb::Coord xyz(1000, -200000000, 30000000);
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// Set the voxel value at (1000, -200000000, 30000000) to 1.
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accessor.setValue(xyz, 1.0);
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// Verify that the voxel value at (1000, -200000000, 30000000) is 1.
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std::cout << "Grid" << xyz << " = " << accessor.getValue(xyz) << std::endl;
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// Reset the coordinates to those of a different voxel.
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xyz.reset(1000, 200000000, -30000000);
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// Verify that the voxel value at (1000, 200000000, -30000000) is
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// the background value, 0.
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std::cout << "Grid" << xyz << " = " << accessor.getValue(xyz) << std::endl;
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// Set the voxel value at (1000, 200000000, -30000000) to 2.
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accessor.setValue(xyz, 2.0);
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// Set the voxels at the two extremes of the available coordinate space.
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// For 32-bit signed coordinates these are (-2147483648, -2147483648, -2147483648)
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// and (2147483647, 2147483647, 2147483647).
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accessor.setValue(openvdb::Coord::min(), 3.0f);
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accessor.setValue(openvdb::Coord::max(), 4.0f);
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std::cout << "Testing sequential access:" << std::endl;
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// Print all active ("on") voxels by means of an iterator.
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for (openvdb::FloatGrid::ValueOnCIter iter = grid->cbeginValueOn(); iter; ++iter) {
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std::cout << "Grid" << iter.getCoord() << " = " << *iter << std::endl;
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}
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}
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