Super NES Programming/Platform Physics

Ground Mode Ground mode is when the player is standing or walking on the ground. In ground mode, the following routine is performed: 1) Check to see if jumping button is pressed 2) If so, jump to "initiate_jump_mode" routine 3) Check collision with the tiles below 4) If all tiles underneath player are empty, jump to "initiate_fall_mode" routine Initiate Jump Mode 1) set "y_velocity" to "take_off_velocity" 2) set "jump_mode" flag Initiate Fall Mode 1) set "y_velocity" to #0 2) set "jump_mode" flag Jump/Fall Mode Jump/Fall mode is when the player jumps or falls. In jump/fall mode, the following routine is performed: 1) increment "y_velocity" by #gravital_acceleration 2) add "y_velocity" to "y_coordinate" 3) if "y_velocity">0, then go to "fall_mode" routine Fall Mode 1) checks for collision between player and tiles 2) If collision is detected, follow "land_on_ground" routine Land on Ground 1) reset "jump_mode" flag 2) pop the sprite up to the top of the ground tile