/* Starshatter OpenSource Distribution Copyright (c) 1997-2004, Destroyer Studios LLC. All Rights Reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name "Destroyer Studios" nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. 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SUBSYSTEM: Stars.exe FILE: FlightComp.cpp AUTHOR: John DiCamillo OVERVIEW ======== Flight Computer System class */ #include "MemDebug.h" #include "FlightComp.h" #include "Ship.h" #include "ShipDesign.h" #include "Thruster.h" // +----------------------------------------------------------------------+ FlightComp::FlightComp(int comp_type, const char* comp_name) : Computer(comp_type, comp_name), mode(0), vlimit(0.0f), trans_x_limit(0.0f), trans_y_limit(0.0f), trans_z_limit(0.0f), throttle(0.0f), halt(0) { } // +----------------------------------------------------------------------+ FlightComp::FlightComp(const Computer& c) : Computer(c), mode(0), vlimit(0.0f), trans_x_limit(0.0f), trans_y_limit(0.0f), trans_z_limit(0.0f), throttle(0.0f), halt(0) { } // +--------------------------------------------------------------------+ FlightComp::~FlightComp() { } // +--------------------------------------------------------------------+ void FlightComp::SetTransLimit(double x, double y, double z) { trans_x_limit = 0.0f; trans_y_limit = 0.0f; trans_z_limit = 0.0f; if (x >= 0) trans_x_limit = (float) x; if (y >= 0) trans_y_limit = (float) y; if (z >= 0) trans_z_limit = (float) z; } // +--------------------------------------------------------------------+ void FlightComp::ExecSubFrame() { if (ship) { ExecThrottle(); ExecTrans(); } } // +--------------------------------------------------------------------+ void FlightComp::ExecThrottle() { throttle = (float) ship->Throttle(); if (throttle > 5) halt = false; } // +--------------------------------------------------------------------+ void FlightComp::ExecTrans() { double tx = ship->TransX(); double ty = ship->TransY(); double tz = ship->TransZ(); double trans_x = tx; double trans_y = ty; double trans_z = tz; bool flcs_operative = false; if (IsPowerOn()) flcs_operative = Status() == System::NOMINAL || Status() == System::DEGRADED; // ---------------------------------------------------------- // FIGHTER FLCS AUTO MODE // ---------------------------------------------------------- if (mode == Ship::FLCS_AUTO) { // auto thrust to align flight path with orientation: if (tx == 0) { if (flcs_operative) trans_x = (ship->Velocity() * ship->BeamLine() * -200); else trans_x = 0; } // manual thrust up to vlimit/2: else { double vfwd = ship->BeamLine() * ship->Velocity(); if (fabs(vfwd)>= vlimit) { if (trans_x > 0 && vfwd > 0) trans_x = 0; else if (trans_x < 0 && vfwd < 0) trans_x = 0; } } if (halt && flcs_operative) { if (ty == 0) { double vfwd = ship->Heading() * ship->Velocity(); double vmag = fabs(vfwd); if (vmag > 0) { if (vfwd > 0) trans_y = -trans_y_limit; else trans_y = trans_y_limit; if (vfwd < vlimit/2) trans_y *= (vmag/(vlimit/2)); } } } // auto thrust to align flight path with orientation: if (tz == 0) { if (flcs_operative) trans_z = (ship->Velocity() * ship->LiftLine() * -200); else trans_z = 0; } // manual thrust up to vlimit/2: else { double vfwd = ship->LiftLine() * ship->Velocity(); if (fabs(vfwd) >= vlimit) { if (trans_z > 0 && vfwd > 0) trans_z = 0; else if (trans_z < 0 && vfwd < 0) trans_z = 0; } } } // ---------------------------------------------------------- // STARSHIP HELM MODE // ---------------------------------------------------------- else if (mode == Ship::FLCS_HELM) { if (flcs_operative) { double compass_heading = ship->CompassHeading(); double compass_pitch = ship->CompassPitch(); // rotate helm into compass orientation: double helm = ship->GetHelmHeading() - compass_heading; if (helm > PI) helm -= 2*PI; else if (helm < -PI) helm += 2*PI; // turn to align with helm heading: if (helm != 0) ship->ApplyYaw(helm); // pitch to align with helm pitch: if (compass_pitch != ship->GetHelmPitch()) ship->ApplyPitch(compass_pitch - ship->GetHelmPitch()); // roll to align with world coordinates: if (ship->Design()->auto_roll > 0) { Point vrt = ship->Cam().vrt(); double deflection = vrt.y; if (fabs(helm) < PI/16 || ship->Design()->turn_bank < 0.01) { if (ship->Design()->auto_roll > 1) { ship->ApplyRoll(0.5); } else if (deflection != 0) { double theta = asin(deflection); ship->ApplyRoll(-theta); } } // else roll through turn maneuvers: else { double desired_bank = ship->Design()->turn_bank; if (helm >= 0) desired_bank = -desired_bank; double current_bank = asin(deflection); double theta = desired_bank - current_bank; ship->ApplyRoll(theta); // coordinate the turn: if (current_bank < 0 && desired_bank < 0 || current_bank > 0 && desired_bank > 0) { double coord_pitch = compass_pitch - ship->GetHelmPitch() - fabs(helm) * fabs(current_bank); ship->ApplyPitch(coord_pitch); } } } } // flcs inoperative, set helm heading based on actual compass heading: else { ship->SetHelmHeading(ship->CompassHeading()); ship->SetHelmPitch(ship->CompassPitch()); } // auto thrust to align flight path with helm order: if (tx == 0) { if (flcs_operative) trans_x = (ship->Velocity() * ship->BeamLine() * ship->Mass() * -1); else trans_x = 0; } // manual thrust up to vlimit/2: else { double vfwd = ship->BeamLine() * ship->Velocity(); if (fabs(vfwd) >= vlimit/2) { if (trans_x > 0 && vfwd > 0) trans_x = 0; else if (trans_x < 0 && vfwd < 0) trans_x = 0; } } if (trans_y == 0 && halt) { double vfwd = ship->Heading() * ship->Velocity(); double vdesired = 0; if (vfwd > vdesired) { trans_y = -trans_y_limit; if (!flcs_operative) trans_y = 0; double vdelta = vfwd-vdesired; if (vdelta < vlimit/2) trans_y *= (vdelta/(vlimit/2)); } } // auto thrust to align flight path with helm order: if (tz == 0) { if (flcs_operative) trans_z = (ship->Velocity() * ship->LiftLine() * ship->Mass() * -1); else trans_z = 0; } // manual thrust up to vlimit/2: else { double vfwd = ship->LiftLine() * ship->Velocity(); if (fabs(vfwd) > vlimit/2) { if (trans_z > 0 && vfwd > 0) trans_z = 0; else if (trans_z < 0 && vfwd < 0) trans_z = 0; } } } if (ship->GetThruster()) { ship->GetThruster()->ExecTrans(trans_x, trans_y, trans_z); } else { ship->SetTransX(trans_x); ship->SetTransY(trans_y); ship->SetTransZ(trans_z); } }