Methods and systems for simulating fluid movement
Methods and systems of simulating a fluid. An outflow of the fluid is determined. An inflow of the fluid is determined. Determining a simulated fluid using the inflow and the outflow.
1. A method of simulating a fluid, comprising:
determining fluid surface location information comprising a new fluid volume, the determining comprising;
taking into account an underlying 3D object along which the fluid flows;
determining 3D location elements for the fluid's surface;
determining inflow and/or outflow using an air diffusion approach, wherein the air diffusion approach comprises determining inflow and/or outflow between a grid cell and neighboring grid cells using at least one of a dither pattern or a Bresenham line pattern; and
determining a new fluid volume using the original fluid volume, the inflow and the outflow; and
generating a fluid simulation using the location information for the fluid's surface.
2. The method of claim 1 , wherein the air diffusion approach comprises distributing inflow and/or outflow between the grid cell and 4 to 8 neighboring grid cells.
3. The method of claim 1 , wherein the Bresenham line pattern makes a choice for the inflow and/or the outflow based on a desired flow direction and 2D coordinates of the grid cell.
4. The method of claim 3 , wherein only the horizontal axis of the 2D coordinates of the grid cell are used.
5. The method of claim 4 , wherein the choice is a function of: a flow angle ranging from 0-45 degrees; and a 1D coordinate ranging from 0 to the width of the grid cell.
6. The method of claim 5 , wherein the flow angle is quantized and the choice is calculated and stored in a 2D lookup table.
7. The method of claim 6 , wherein the 2D lookup table is stored as a texture, with UV coordinates derived from grid cell coordinates and the quantized flow angle.
8. The method of claim 1 wherein the flow map calculated for the fluid simulation is impacted by vector displacement calculated for a soft tissue simulation.
9. A system of simulating a fluid, comprising:
a processor configured for:
determining fluid surface location information comprising a new fluid volume, the determining comprising;
taking into account an underlying 3D object along which the fluid flows;
determining 3D location elements for the fluid's surface;
determining inflow and/or outflow using an air diffusion approach, wherein the air diffusion approach comprises determining inflow and/or outflow between a grid cell and neighboring grid cells using at least one of a dither pattern or a Bresenham line pattern; and
determining a new fluid volume using the original fluid volume, the inflow and the outflow; and
generating a fluid simulation using the location information for the fluid's surface.
10. The system of claim 9 , wherein the air diffusion approach comprises distributing inflow and/or outflow between the grid cell and 4 to 8 neighboring grid cells.
11. The system of claim 9 , wherein the Bresenham line pattern makes a choice for the inflow and/or the outflow based on a desired flow direction and 2D coordinates of the grid cell.
12. The system of claim 11 , wherein only the horizontal axis of the 2D coordinates of the grid cell are used.
13. The system of claim 12 , wherein the choice is a function of: a flow angle ranging from 0-45 degrees; and a 1D coordinate ranging from 0 to the width of the grid cell.
14. The system of claim 13 , wherein the flow angle is quantized and the choice is calculated and stored in a 15D lookup table.
15. The system of claim 14 , wherein the 2D lookup table is stored as a texture, with UV coordinates derived from grid cell coordinates and the quantized flow angle.
16. The method of claim 9 , wherein the flow map calculated for the fluid simulation is impacted by vector displacement calculated for a soft tissue simulation.