Variables
This is a list of useful variables and usages of them inside the source.
General
| Variable | What it returns |
|---|---|
| pmap[y][x] | Particle-map. (pmap[y][x]&0xFF) returns the particle type at (x,y), (pmap[y][x]>>8) returns the index of the particle at (x,y). Energy particles are not stored in, here you need to use photons. |
| sim->photons[y][x] | Photon-map. This works exactly like pmap, but only PHOT, NEUT, ELEC, and PROT are stored here (any particle with TYPE_ENERGY) |
| sim->bmap[y][x] | Block-map. Returns wall at [y][x]. Wall constants are defined in src/simulation/SimulationData.h |
| sim->emap[y][x] | Electronics-map. Used for conductive walls. If it is 1, that means the wall at that location is conducting. |
| r | usually preset to pmap[y][x] |
| parts[i] | the particle that has index i |
| sim->pv[y/CELL][x/CELL] | The pressure at x,y. Pressure is on a 4x4 grid like walls. Is a float(0.0f for 0). |
| sim->vx[y/CELL][x/CELL] | The air velocity in the x direction at x,y. Uses a 4x4 grid like walls. Is a float(0.0f for 0). |
| sim->vy[y/CELL][x/CELL] | The air velocity in the y direction at x,y. Uses a 4x4 grid like walls. Is a float(0.0f for 0). |
| sim->hv[y/CELL][x/CELL] | The ambient heat at x,y. It is on a 4x4 grid like walls and pressure. Is a float(0.0f for 0). |
| t | Current particle type in some places. ex. PT_DUST |
Particle
To get information from a particle, use parts[i].1, where i is the particle index. The index may also be stored as r>>8 instead of i. This is normally used in the update functions for particles. i is the index of the particle that is being updated, and r>>8 is the index of a particle surrounding it that it might react with or modify. To get the type of the particle from the variable r, use (r&0xFF).
Particle Information
| Variable | What it returns |
|---|---|
| parts[2].type | Contains the particle's current type. |
| parts[2].ctype | Contains the particle's previous type (for example LAVA/SPRK) or the type of particle it is cloning (CLNE/...) usually. |
| parts[2].life | Contains the particle's life. |
| parts[2].temp | Contains the particle's temperature. It's a float(0.0f for 0K, which is -273.15C). All temps are stored in Kelvins. |
| parts[2].tmp | Contains a value which can be used for anything. Most particles don't use it. |
| parts[2].tmp2 | Contains another value. Even less particles use this. |
| parts[2].dcolour | Contains the particle's decoration color, 32bit ARGB |
| parts[2].x | Contains the particle's x coordinate. It is not an integer, it's a float. To get the exact coordinate, add .5 to it before changing it to an int. |
| parts[2].y | Contains the particle's y coordinate. It is not an integer, it's a float. To get the exact coordinate, add .5 to it before changing it to an int. |
| parts[2].vx | Contains the particle's x velocity. It is a float. |
| parts[2].vy | Contains the particle's y velocity. It is a float |
1 - use either type, ctype, life, temp or tmp
2 - use either r>>8 or i. See above (Particle) for more info.
