Difference between revisions of "Variables"
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! Variable || What it returns | ! Variable || What it returns | ||
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| − | | pmap[y][x] || Particle-map. (pmap[y][x]&0xFF) returns the particle at (x,y), (pmap[y][x]>>8) returns the index of the particle at (x,y). | + | | 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). |
|- | |- | ||
| bmap[y][x] || Block-map. Returns wall at [y][x]. | | bmap[y][x] || Block-map. Returns wall at [y][x]. | ||
Revision as of 00:52, 18 January 2012
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). |
| bmap[y][x] | Block-map. Returns wall at [y][x]. |
| emap[y][x] | Electronics-map. Used for conductive walls. |
| r | usually preset to pmap[y][x] |
| parts[i] | the particle that has index i |
| 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). |
| 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). |
| 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). |
| 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). |
| sl | Selected left. Means particle selected in menu by left mouse button. |
| sr | Selected right. Means particle selected in menu by right mouse button. |
| t | Current particle type. 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.
