mirror of https://github.com/dirtbags/tanks.git
108 lines
3.0 KiB
C
108 lines
3.0 KiB
C
#pragma once
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/* τ = 2π */
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#define TAU 6.28318530717958647692
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#define PI 3.14159265358979323846
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/* Some in-game constants */
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#define TANK_MAX_SENSORS 10
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#define TANK_RADIUS 7.5
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#define TANK_SENSOR_RANGE 100
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#define TANK_CANNON_RECHARGE 20 /* Turns to recharge cannon */
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#define TANK_CANNON_RANGE (TANK_SENSOR_RANGE / 2)
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#define TANK_MAX_ACCEL 35
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#define TANK_MAX_TURRET_ROT (TAU / 8)
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#define TANK_TOP_SPEED 7
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#define TANK_FRICTION 0.75
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/* (tank radius + tank radius)^2 */
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#define TANK_COLLISION_ADJ2 \
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((TANK_RADIUS + TANK_RADIUS) * (TANK_RADIUS + TANK_RADIUS))
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/* (Sensor range + tank radius)^2
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* If the distance^2 to the center of a tank <= TANK_SENSOR_ADJ2,
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* that tank is within sensor range. */
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#define TANK_SENSOR_ADJ2 \
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((TANK_SENSOR_RANGE + TANK_RADIUS) * (TANK_SENSOR_RANGE + TANK_RADIUS))
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#define TANK_CANNON_ADJ2 \
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((TANK_CANNON_RANGE + TANK_RADIUS) * (TANK_CANNON_RANGE + TANK_RADIUS))
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#ifndef rad2deg
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#define rad2deg(r) ((int)(360 * (r) / TAU))
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#define deg2rad(r) ((r * TAU) / 360)
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#endif
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#ifndef max
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#define max(a, b) (((a) > (b)) ? (a) : (b))
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#define min(a, b) (((a) < (b)) ? (a) : (b))
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#endif
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struct tanks_game {
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float size[2]; /* dimensions of playing field */
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};
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struct tank;
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struct sensor {
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float angle;
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float width;
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int range;
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int turret; /* Mounted to turret? */
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int triggered;
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};
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typedef void tank_run_func(struct tank *, void *);
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struct tank {
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float position[2]; /* Current position on the board */
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float angle; /* Current orientation */
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struct {
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float current[2]; /* Current tread speed */
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float desired[2]; /* Desired tread speed */
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} speed;
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struct {
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float current; /* Current turret angle */
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float desired; /* Desired turret angle */
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int firing; /* True if firing this turn */
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int recharge; /* Turns until gun is recharged */
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} turret;
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struct sensor sensors[TANK_MAX_SENSORS]; /* Sensor array */
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int led; /* State of the LED */
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struct tank *killer; /* Killer, or NULL if alive */
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char *cause_death; /* Cause of death */
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tank_run_func *run; /* Function to run a tank */
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void *udata; /* Argument to pass to run */
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};
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void tank_init(struct tank *tank, tank_run_func *run, void *udata);
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void tanks_run_turn(struct tanks_game *game, struct tank *tanks, int ntanks);
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/*
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*
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* Tanks API for scripts
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*
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*/
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/** Has the turret recharged? */
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int tank_fire_ready(struct tank *tank);
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/** Fire! */
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void tank_fire(struct tank *tank);
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/** Set desired speed */
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void tank_set_speed(struct tank *tank, float left, float right);
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/** Get the current turret angle */
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float tank_get_turret(struct tank *tank);
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/** Set the desired turret angle */
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void tank_set_turret(struct tank *tank, float angle);
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/** Is a sensor active? */
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int tank_get_sensor(struct tank *tank, int sensor_num);
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/** Set the LED state */
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void tank_set_led(struct tank *tank, int active);
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