/* neonio's SpaceWar! v1.0.0 */ /* dependencies: raylib */ #include /* NULL */ #include /* malloc */ #include /* memcpy */ #include "raylib.h" #include "raymath.h" #define screenWidth 600 enum collisiongroups { EARTH=1,VENUS=2,TORP=4,DUST=8 }; enum types { T_SHIP,T_WELL,T_TORPEDO,T_DUST }; /* Extra vector functions */ Vector2 Vector2FromAngle(float angle,float magnitude){ return Vector2Rotate((Vector2){0.0,magnitude},angle); } Vector2 Vector2RandomSquare(float min,float max){ return (Vector2){ (GetRandomValue(0,1000)/1000.0)*(max-min)+min, (GetRandomValue(0,1000)/1000.0)*(max-min)+min }; } /* Doubly-linked "object" list */ struct bindings { int cw,ccw,thrust,fire; }; struct object { char type; Vector2 position,velocity; float angle,radius; char colmask; struct { char grav:1,drag:1; } flags; /* todo: change 'flags' to 'flag' */ struct { void (*move)(struct object* this); void (*draw)(struct object* this); void (*collide)(struct object* this,struct object* that); void (*kill)(struct object* this); } on; float counter; struct bindings* bind; struct object *next, *prev; }; struct object* AddObject(struct object* tail,const struct object* obj){ struct object* new = malloc(sizeof(struct object)); memcpy(new, obj, sizeof(*new)); if (tail) new->next = tail->next; else new->next = NULL; new->prev = tail; if (new->next) new->next->prev = new; if (new->prev) new->prev->next = new; return new; } void RemObject(struct object* obj){ if(obj->prev) obj->prev->next = obj->next; if(obj->next) obj->next->prev = obj->prev; free(obj); } /* Object list walkers */ void MoveAllObjects(struct object* head){ for (;head;head=head->next) if (head->on.move) (*head->on.move)(head); } void DrawAllObjects(struct object* head){ for (;head;head=head->next) if (head->on.draw) (*head->on.draw)(head); } void CollideAllObjects(struct object* head){ for(struct object* this = head; this; this = this->next){ if(this->on.collide) for(struct object* that = head; that; that = that->next){ if(this!=that && this->colmask & that->colmask && CheckCollisionCircles(this->position, this->radius, that->position, that->radius)) (*this->on.collide)(this,that); } this->position.x = Wrap(this->position.x,-1.0,1.0); this->position.y = Wrap(this->position.y,-1.0,1.0); } } void KillAllObjects(struct object* head){ for (;head;head=head->next) if (head->on.kill && head->counter<=0 ) (*head->on.kill)(head); } /* Move/Draw/Collide/Kill functions */ void DrawShip(struct object* this){ Vector2 shipHalf = Vector2FromAngle(this->angle,this->radius/2.0); DrawPolyLines(this->position, (this->colmask&EARTH)?3:5, this->radius,this->angle*RAD2DEG+90,WHITE); DrawLineV(Vector2Subtract(this->position,shipHalf), Vector2Add(this->position,shipHalf), WHITE); } void DrawWell(struct object* this){ DrawCircleLinesV(this->position,this->radius, ColorLerp(BLACK,WHITE,this->counter)); this->counter *= 0.5; } void DrawTorpedo(struct object* this){ if(this->counter<=0) DrawCircleV(this->position,this->radius,WHITE); else DrawLineV(this->position, Vector2Add(this->position, Vector2FromAngle(this->angle,this->radius)), WHITE); } void DrawDust(struct object* this){ DrawLineV(this->position, Vector2Add(this->position, Vector2Negate(this->velocity)), ColorLerp(DARKGRAY,WHITE,this->counter)); } void CollideWell(struct object *this,struct object *that){ this->counter += 0.05; that->position = Vector2RandomSquare(-1.0,1.0); that->velocity = Vector2Zero(); } void CollideTorpedo(struct object *this,struct object *that){ if(that->type==T_SHIP){ this->counter = 0; that->counter = 0; } else if (that->type==T_TORPEDO){ this->counter = 0; that->counter = 0; } } void MoveObject(struct object *this){ if(this->flags.grav) this->velocity = Vector2Add(this->velocity, Vector2Scale (Vector2Normalize(Vector2Negate(this->position)), 0.00002 * /* G*m1*m2 */ 1 / ( Vector2Length(this->position) * Vector2Length(this->position)))); if(this->flags.drag) this->velocity = Vector2Scale(this->velocity, 0.99); this->position = Vector2Add(this->position, this->velocity); } void MoveDust(struct object* this){ this->counter*=0.999; MoveObject(this); } void MakeDust(struct object* tail,Vector2 position,int amount,float velocity){ for(int i=amount; i--; tail = AddObject(tail, &(struct object){T_DUST, position, Vector2RandomSquare (-1.0*velocity,velocity), 0,0,DUST,{1,1},{&MoveDust,&DrawDust}, 1.0})); } void Thrust(struct object* this,float impulse){ this->velocity = Vector2Add(this->velocity, Vector2FromAngle(this->angle,impulse)); } void KillTorpedo(struct object* this){ MakeDust(this,this->position,3,0.005), RemObject(this); } void MoveTorpedo(struct object* this){ this->counter--, Thrust(this,0.0005), MoveObject(this); } void MoveShip(struct object* this){ if(IsKeyDown(this->bind->cw)) this->angle += DEG2RAD* 2.5; if(IsKeyDown(this->bind->ccw)) this->angle += DEG2RAD*-2.5; if(IsKeyDown(this->bind->thrust)) Thrust(this,0.0002); if(IsKeyPressed(this->bind->fire)){ struct object* torpedo = AddObject(this, &(struct object) {T_TORPEDO, this->position,this->velocity,this->angle,0.01,0,{1,1}, {&MoveTorpedo,&DrawTorpedo,&CollideTorpedo,&KillTorpedo}, 100.0}); if(this->colmask & EARTH) torpedo->colmask |= VENUS; else torpedo->colmask |= EARTH; torpedo->colmask |= TORP; } MoveObject(this); } void KillShip(struct object* this){ MakeDust(this,this->position,18,0.01), RemObject(this); } void DrawMenu(struct object* head){ int shipCount = 0, winner = 0; for(struct object* current=head;current;current=current->next) if(current->type==T_SHIP){ shipCount++; winner = current->colmask; } if(shipCount<=1){ if(winner&EARTH) DrawText("GAME OVER\nTERRAN VICTORY",screenWidth/2,screenWidth/2,12,WHITE); else DrawText("GAME OVER\nVENUSIAN VICTORY",screenWidth/2,screenWidth/2,12,WHITE); } } int main() { struct bindings earthBinds = {KEY_D,KEY_A,KEY_W,KEY_S}; struct bindings venusBinds = {KEY_L,KEY_J,KEY_I,KEY_K}; struct object* head = AddObject(NULL, &(struct object) {T_WELL, Vector2Zero(),Vector2Zero(),0,0.1,EARTH|VENUS|TORP|DUST,{0,0}, {NULL,&DrawWell,&CollideWell,NULL},1.0}); struct object* tail = head; tail = AddObject(tail, &(struct object) {T_SHIP, {0.5,0.5},Vector2Zero(),PI,0.03,EARTH,{1,1}, {&MoveShip,&DrawShip,NULL,&KillShip}, 1.0, &earthBinds}); struct object* earth = tail; tail = AddObject(tail, &(struct object) {T_SHIP, {-0.5,-0.5},Vector2Zero(),PI,0.03,VENUS,{1,1}, {&MoveShip,&DrawShip,NULL,&KillShip}, 1.0, &venusBinds}); for(InitWindow(screenWidth,screenWidth,"spacewar"), SetTargetFPS(60), SetRandomSeed(200); !WindowShouldClose(); ){ KillAllObjects(head); CollideAllObjects(head); MoveAllObjects(head); BeginDrawing(), ClearBackground(BLACK), BeginMode2D((Camera2D){{screenWidth/2,screenWidth/2},Vector2Zero(), 0,screenWidth/2}); DrawAllObjects(head); EndMode2D(), DrawMenu(head), EndDrawing(); } CloseWindow(); return 0; }