This is a list of useful variables and usages of them inside the source.

^ General ^^ ^ Variable ^ What it returns ^ | pmap[y][x] | Particle-map. Returns particle at [y][x] | | 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] | | 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). | | 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 ^^ ^ Variable ^ What it returns ^ | parts[i].¹ | Current Particle | | parts[r>>8].¹ | A property of particle 'r'. Is usually around(based on for loops) the current one(i). | | (r&0xFF) | Same as (parts[r>>8].type) | ^ Particle Information ^^ ^ Variable ^ What it returns ^ | parts[²].type | Contains the particles current type. | | parts[²].ctype | Contains the particles previous type (for example LAVA) or the type of particle to clone with BCLN, PCLN or CLNE | | parts[²].life | Contains the particles life. | | parts[²].temp | Contains the particles Temperature. Is a float(0.0f for 0). | | parts[²].tmp | Contains the particles temporary values which can be used for anything. | ^^^

|¹ - use either type, ctype, life, temp or tmp||

|² - use either r>>8 or i||