Technologies:
CUDA - Convert mesh data into volume texture (brute force method).
OpenGL - Real time rendering (raymarching).
Compile with Visual Studio command line: nvcc -o demo.exe demo.cu -lopengl32 -arch=sm_30 user32.lib gdi32.lib
Run executable with command line parameters.
Pattern:
demo filename mapsize steps cminr cming cminb cmaxr cmaxg cmaxb intensity threshold crangemin crangemax resX resY mode bin offx offy offz
where:
filename - VTK file;
mapsize - (int) volume texture resolution;
steps - (int) raymarching iterator;
cminr cming cminb - RGB value for minimal scalar;
cmaxr cmaxg cmaxb - RGB value for maximum scalar;
intensity - transfer function intensity;
threshold - loop threshold (raymarching);
crangemin - minimum interpolator for scalars;
crangemax - maximum interpolator for scalars;
resX - screen width;
resY - screen height;
mode - mode (0) voxelize mesh and render, mode (1) load 3D texture from file, mode (2) save 3D texture to file;
bin - binary file (if active mode==1 or mode==2);
offx offy offz - voxel map offset after interpolation (in range 0-1).
Example usage: demo obraz3LW_A.vtk 128 128 0.0 0.0 1.0 0.1 0.0 0.0 1.0 1.0 0.0 1.0 1280.0 720.0 0 image.bin 0.25 0.25 0.0
Tested with NVCC version 9.0.176 and RTX 2070.
Key binding:
mouse - camera rotation;
WSAD - camera translation;
Bounds:
keys U I O P - decrease xmin, increase xmin, decrease xmax, increase xmax;
keys H J K L - decrease ymin, increase ymin, decrease ymax, increase ymax;
keys V B N M - decrease zmin, increase zmin, decrease zmax, increase zmax;
hold X - debug mode (blending off and show bounding box)
ESC - exit
