962 lines
20 KiB
C
962 lines
20 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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/* http://wiki.kerbalspaceprogram.com/wiki/Tutorial:Advanced_Rocket_Design */
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/* Also, high school physics (thanks Mr. Brennen) */
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#define PI 3.14159265358979323846264338327
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static double vector_magnitude(double a,double b) {
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return sqrt(a*a+b*b);
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}
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static void home(void) {
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printf("%c[2J%c[1;1H",27,27);
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}
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static void htabvtab(int x,int y) {
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printf("%c[%d;%dH",27,y,x);
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}
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#define KERBIN_RADIUS 600000.0
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#if 0
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int autopilot(double fuel_left, double altitude, double *angle) {
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if (fuel_left>25.0) {
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*angle=45.0;
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return 1;
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}
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if (altitude>KERBIN_RADIUS+40000) {
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*angle=100.0; /* actually want tanegent to surface */
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return 1;
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}
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return 0;
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}
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#endif
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static void erase_old_ship(void) {
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printf("\033[1;40;37m"
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"\033[7;33H "
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"\033[8;33H "
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"\033[9;33H "
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"\033[10;33H "
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"\033[11;33H "
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"\033[12;33H ");
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printf("\033[13;33H ");
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}
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static void draw_ship(int stage, int thrusting, int rotation) {
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// if (stage) {
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if (rotation==0) {
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printf("\033[1;40;37m"
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"\033[7;40H_"
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"\033[8;39H/\033[36mo\033[37m\\"
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"\033[9;38H/___\\"
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"\033[10;38H| \033[41m \033[40m |"
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"\033[11;38H|___|"
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"\033[12;39H\033[36m/_\\\033[37m");
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if (thrusting) {
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printf("\033[13;39H\033[33m\\\033[31m|\033[33m/\033[37m");
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}
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}
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if (rotation==8) {
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printf(
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"\033[1;40;37m"
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"\033[7;42H_"
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"\033[8;41H/\\\033[36mo\033[37m\\"
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"\033[9;40H/ \033[41m \033[40m\\|"
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"\033[10;39H/ /"
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"\033[11;38H\033[36m_\033[37m\\ /"
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);
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if (thrusting) {
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printf(
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"\033[12;37H\033[33m/\033[36m\\/\033[37m\\/"
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"\033[13;37H\033[33m--\033[37m");
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}
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else {
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printf(
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"\033[12;37H \033[36m\\/\033[37m\\/");
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}
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}
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if (rotation==16) {
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printf("\033[1;40;37m");
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if (thrusting) {
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printf(
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"\033[8;36H\033[36m_ \033[37m____ _"
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"\033[9;34H\033[33m-\033[36m| -\033[37m| | \\"
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"\033[10;33H\033[33m-\033[31m-\033[36m| \033[37m| \033[41m \033[40m| \033[36mo\033[37m|"
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"\033[11;34H\033[33m-\033[36m|_-\033[37m|____|_/"
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);
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}
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else {
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printf(
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"\033[8;36H\033[36m_ \033[37m ____ _"
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"\033[9;34H \033[36m| -\033[37m| | \\"
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"\033[10;33H \033[36m| \033[37m| \033[41m \033[40m| \033[36mo\033[37m|"
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"\033[11;34H \033[36m|_-\033[37m|____|_/"
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);
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}
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}
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if (rotation==24) {
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printf("\033[1;40;37m");
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if (thrusting) {
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printf(
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"\033[7;38H\033[33m__\033[37m"
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"\033[8;38H\033[33m\\\033[36m/|\033[37m/\\"
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);
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}
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else {
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printf(
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"\033[8;38H \033[36m/|\033[37m/\\"
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);
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}
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printf(
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"\033[9;38H\033[36m'-\033[37m/ \\"
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"\033[10;40H\\ \\"
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"\033[11;41H\\ \033[41m \033[40m/|"
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"\033[12;42H\\/\033[36mo\033[37m/"
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"\033[13;43H-/"
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);
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}
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if (rotation==32) {
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printf("\033[1;40;37m");
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if (thrusting) {
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printf("\033[7;39H\033[33m/\033[31m|\033[33m\\");
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}
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printf(
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"\033[8;39H\033[36m\\-/\033[37m"
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"\033[9;38H| |"
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"\033[10;38H| \033[41m \033[40m |"
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"\033[11;38H\\---/"
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"\033[12;39H\\\033[36mo\033[37m/"
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"\033[13;40H-"
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);
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}
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if (rotation==40) {
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printf("\033[1;40;37m");
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if (thrusting) {
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printf(
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"\033[7;44H\033[33m__\033[37m"
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"\033[8;41H/\\\033[36m|\\\033[33m/\033[36m"
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);
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}
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else {
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printf(
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"\033[8;41H/\\\033[36m|\\\033[37m"
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);
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}
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printf(
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"\033[9;40H/ \\\033[36m-'\033[37m"
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"\033[10;39H/ /"
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"\033[11;38H|\\\033[41m \033[40m /"
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"\033[12;38H\\\033[36mo\033[37m\\/"
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"\033[13;39H\\-"
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);
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}
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if (rotation==48) {
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printf("\033[1;40;37m");
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if (thrusting) {
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printf(
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"\033[8;35H_ ____ \033[36m_\033[37m"
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"\033[9;34H/ | |\033[36m- |\033[33m-\033[37m"
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"\033[10;33H|\033[36mo\033[37m |\033[41m \033[40m | \033[36m|\033[31m-\033[33m-\033[37m"
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"\033[11;34H\\_|____|\033[36m-_|\033[33m-\033[37m"
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);
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}
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else {
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printf(
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"\033[8;35H_ ____ \033[36m_\033[37m"
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"\033[9;34H/ | |\033[36m- |\033[36m"
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"\033[10;33H|\033[36mo\033[37m |\033[41m \033[40m | \033[36m|\033[37m"
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"\033[11;34H\\_|____|\033[36m-_|\033[37m"
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);
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}
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}
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if (rotation==56) {
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printf("\033[1;40;37m");
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printf(
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"\033[7;37H_"
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"\033[8;36H/\033[36mo\033[37m/\\"
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"\033[9;36H|/\033[41m \033[40m \\"
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"\033[10;37H\\ \\"
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"\033[11;38H\\ /\033[36m_\033[37m"
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);
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if (thrusting) {
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printf(
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"\033[12;39H\\/\033[36m|/\033[33m\\\033[37m"
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"\033[13;42H\033[33m--\033[37m"
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);
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}
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else {
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printf(
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"\033[12;39H\\/\033[36m|/\033[37m"
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);
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}
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}
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// }
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#if 0
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40,10=middle, so want 40,7
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_______________
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_ |
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/O\ |
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/___\ |
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| R | |
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|___| |
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/_\ |
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\|/ |
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---------------|
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_______________
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_ |
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/o/\ |
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|/R \ |
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\ \ |
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\ /_ |
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\/|/\ |
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-- |
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---------------|
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_______________
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_ ____ _ |
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/ | |- |- |
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|O |R | |--|
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\_|____|-_|- |
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---------------|
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_______________
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__ |
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/\|\/ |
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/ \-' |'
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/ / |
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|\R / |
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\o\/ |
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\- |
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_______________
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_______________
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/|\ |
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\-/ |
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|---| |
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| R | |
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\---/ |
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\O/ |
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- |
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_______________
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_______________
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__ |
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\/|/\ |
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'-/ \ |'
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\ \ |
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\ R/| |
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\/o/ |
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-/ |
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_______________
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_______________
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_ ____ _ |
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-| -| | \ |
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--| | R| O| |
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-|_-|____|_/ |
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---------------|
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_______________
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_ |
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/\o\ |
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/ R\| |
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/ / |
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_\ / |
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/\/\/ |
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-- |
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---------------|
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#endif
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#if 0
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htabvtab(20,9);
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if (angle<0.392) printf("^");
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else if (angle<1.178) printf("/");
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else if (angle<1.963) printf(">");
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else if (angle<2.748) printf("\\");
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else if (angle<3.534) printf("V");
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else if (angle<4.320) printf("/");
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else if (angle<5.105) printf("<");
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else if (angle<5.890) printf("\\");
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else printf("^");
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#endif
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}
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static void draw_parachutes(void) {
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printf(
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"\033[3;39H\033[41m "
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"\033[4;34H \033[47m \033[41m \033[47m \033[41m "
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"\033[5;33H \033[47m \033[41m \033[47m \033[41m "
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"\033[40m"
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"\033[6;34H\\\033[6;46H/"
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"\033[7;35H\\\033[7;45H/"
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"\033[8;36H\\\033[8;44H/"
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"\033[9;37H\\\033[9;43H/"
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);
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}
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static void draw_horizon(int height,int erase) {
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printf("\033[%d;1H",10+height);
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if (erase) {
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printf(" ");
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}
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else {
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printf("\033[32m-----------------------------------------------------------------------\033[37m");
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}
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}
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static void draw_gantry(void) {
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printf(
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"\033[31m"
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"\033[7;33H_____ "
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"\033[8;33H||"
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"\033[9;33H||"
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"\033[10;33H||=="
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"\033[11;33H||"
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"\033[12;33H||"
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"\033[37m"
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);
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}
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static void draw_astronaut(void) {
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printf(
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"\033[42m"
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"\033[15;74H "
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"\033[16;74H "
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"\033[17;74H \033[47;30mO\033[42m \033[47mO\033[42m "
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"\033[18;74H "
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"\033[19;74H --- "
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"\033[20;74H "
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"\033[40;37m"
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);
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}
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static void switch_to_surface(void) {
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home();
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/* mostly just draw kerbal blank */
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draw_astronaut();
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}
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static void switch_to_orbit(void) {
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int s;
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home();
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for(s=0;s<30;s++) {
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printf("\033[%d;%dH.",(rand()%20)+1,(rand()%80)+1);
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}
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printf("\033[19;20H\033[44m ");
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printf("\033[20;10H \033[42m \033[47m ");
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printf("\033[40m");
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draw_astronaut();
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}
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#define FACE_NEUTRAL 0
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#define FACE_SCREAM 1
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#define FACE_SMILE 2
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#define FACE_FROWN 3
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static void update_mouth(int type) {
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switch(type) {
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case FACE_SCREAM:
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printf(
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"\033[30;42m"
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"\033[18;74H "
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"\033[19;74H O "
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"\033[37;40m"
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);
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break;
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case FACE_SMILE:
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printf(
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"\033[30;42m"
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"\033[18;74H "
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"\033[19;74H \\_/ "
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"\033[37;40m"
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);
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break;
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case FACE_FROWN:
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printf(
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"\033[30;42m"
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"\033[18;74H _ "
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"\033[19;74H / \\ "
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"\033[37;40m"
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);
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break;
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case FACE_NEUTRAL:
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default:
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printf(
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"\033[30;42m"
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"\033[18;74H "
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"\033[19;74H --- "
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"\033[37;40m"
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);
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break;
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}
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}
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static void adjust_eyes(void) {
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int r;
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r=rand()%4;
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printf("\033[30;42m\033[17;74H");
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switch(r) {
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case 0: printf(" \033[47mO\033[42m \033[47mO\033[42m "); break;
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case 1: printf(" \033[47mo\033[42m \033[47mO\033[42m "); break;
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case 2: printf(" \033[47mO\033[42m \033[47mo\033[42m "); break;
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case 3: printf(" \033[47mo\033[42m \033[47mo\033[42m "); break;
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}
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printf("\033[37;40m");
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}
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int main(int argc, char **argv) {
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FILE *logfile,*vlogfile;
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double angle=0;
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double capsule_mass=1.0;
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int rotation=0;
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// double engines=3;
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double engine_isp=270.0; /* s */
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// double engine_mass=(1.5)*engines; /* tons */
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// double engine_thrust=(168.0)*engines; /* kN */
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// double fuel_flow_rate;
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// double tanks=6;
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// double tank_mass=(0.5)*tanks; /* tons */
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// double fuel_mass=(4.0)*tanks; /* tons */
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// double total_fuel=fuel_mass;
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double fuel_left=100.0;
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double gravity=-9.8; /* m/s^2 */
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double gravity_x=0.0;
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double gravity_y=-9.8;
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double gravity_angle=0.0;
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/* Kerbin radius = 600km */
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double rocket_velocity=0.0;
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double rocket_velocity_x=0.0; /* m/s */
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double rocket_velocity_y=0.0; /* m/s */
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double rocket_acceleration_x=0.0; /* m/s^2 */
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double rocket_acceleration_y=0.0; /* m/s^2 */
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double rocket_x=0;
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double rocket_y=KERBIN_RADIUS+10;
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double rocket_altitude=KERBIN_RADIUS; /* m */
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double v0_x,v0_y;
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double time=0.0; /* s */
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double deltat=1.0;
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double eye_count=0.0;
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int bingo_fuel=0;
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double max_altitude=0.0;
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int height=0;
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/* atmospheric pressure */
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double pressure=101325; /* Pascals */
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double pressure0=101325;
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double density=0; /* kg/m^3 */
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double temperature=273; /* K */
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double drag=0.0,drag_a=0.0;
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double drag_angle,drag_x,drag_y,drag_a_x,drag_a_y;
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int orbit_map_view=0,current_quadrant=0;
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int parachutes_deployed=0;
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int parachutes=3;
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double terminal_velocity=0.0;
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double adjusted_altitude=0.0;
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int launched=1;
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int landed=0;
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int stage=2;
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int log_step=0;
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char input;
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int thrusting=1,i,j;
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int stages=3;
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int engines[3],stacks[3],tanks[3];
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double stage_empty_mass[3],stage_full_mass[3],total_mass[3],thrust[3];
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double fuel_mass[3],stage_fuel_total[3];
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double deltav[3],twr[3],fuel_flow[3];
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logfile=fopen("log.jgr","w");
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vlogfile=fopen("vlog.jgr","w");
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engines[0]=1; stacks[0]=1; tanks[0]=1;
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engines[1]=2; stacks[1]=2; tanks[1]=1;
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engines[2]=3; stacks[2]=3; tanks[2]=1;
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/* 1000 */
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for(i=0;i<stages;i++) {
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stage_empty_mass[i]=(engines[i]*1.5)+(stacks[i]*tanks[i]*0.5);
|
|
if (i==0) stage_empty_mass[i]+=capsule_mass;/* tons */
|
|
fuel_mass[i]=(stacks[i]*tanks[i]*4.0);
|
|
stage_fuel_total[i]=fuel_mass[i];
|
|
stage_full_mass[i]=stage_empty_mass[i]+fuel_mass[i];
|
|
|
|
/* 1020 */
|
|
total_mass[i]=0.0;
|
|
for(j=i;j>=0;j--) {
|
|
total_mass[i]+=stage_full_mass[j];
|
|
}
|
|
thrust[i]=engines[i]*168.0; /* kN */
|
|
deltav[i]=engine_isp*-gravity*log(total_mass[i]/(total_mass[i]-fuel_mass[i]));
|
|
twr[i]=thrust[i]/(total_mass[i]*-gravity);
|
|
fuel_flow[i]=(thrust[i])/(engine_isp*-gravity);
|
|
printf("Stage %d\n",i+1);
|
|
printf("\ttanks=%d engines=%d\n",stacks[i]*tanks[i],engines[i]);
|
|
printf("\tstage mass=%lf total_mass=%lf\n",stage_full_mass[i],
|
|
total_mass[i]);
|
|
printf("\tdeltaV=%lf\n",deltav[i]);
|
|
printf("\tTWR=%lf\n",twr[i]);
|
|
|
|
}
|
|
|
|
// printf("Fuel flow rate=%lf, time=%lfs\n",
|
|
// fuel_flow_rate,fuel_mass/fuel_flow_rate);
|
|
|
|
scanf("%c",&input);
|
|
|
|
/* Initialize variables */
|
|
|
|
/* 3000 */
|
|
angle=0.0;
|
|
rotation=0;
|
|
gravity_x=0.0;
|
|
gravity_y=-9.8;
|
|
gravity_angle=0.0;
|
|
rocket_velocity=0.0;
|
|
rocket_velocity_x=0.0;
|
|
rocket_velocity_y=0.0;
|
|
rocket_acceleration_x=0.0;
|
|
rocket_acceleration_y=0.0;
|
|
|
|
/* 3016 */
|
|
rocket_x=0.0;
|
|
rocket_y=KERBIN_RADIUS+10.0;
|
|
rocket_altitude=KERBIN_RADIUS+10.0;
|
|
thrusting=0;
|
|
time=0.0;
|
|
bingo_fuel=0.0;
|
|
max_altitude=0.0;
|
|
parachutes_deployed=0;
|
|
launched=0;
|
|
current_quadrant=0;
|
|
orbit_map_view=0;
|
|
|
|
/* 3020 */
|
|
home();
|
|
/* init_graphics() */
|
|
height=0;
|
|
switch_to_surface();
|
|
draw_horizon(height,0);
|
|
draw_gantry();
|
|
draw_ship(stage,thrusting,rotation);
|
|
|
|
/* Main Loop */
|
|
/* 4000 */
|
|
while(1) {
|
|
|
|
/* 4002 */
|
|
if (!launched) goto after_physics;
|
|
|
|
/* 4003 */
|
|
adjusted_altitude=rocket_altitude-KERBIN_RADIUS;
|
|
if (adjusted_altitude>max_altitude) max_altitude=adjusted_altitude;
|
|
|
|
|
|
/* 4018 */
|
|
fuel_left=fuel_mass[stage]*100.0/stage_fuel_total[stage];
|
|
|
|
/* 4020 */
|
|
if (thrusting) {
|
|
if (fuel_mass[stage]<0.1) {
|
|
fuel_mass[stage]=0.0;
|
|
bingo_fuel=1;
|
|
rocket_acceleration_x=0;
|
|
rocket_acceleration_y=0;
|
|
|
|
}
|
|
else {
|
|
rocket_acceleration_x=(thrust[stage]/total_mass[stage])*sin(angle);
|
|
rocket_acceleration_y=(thrust[stage]/total_mass[stage])*cos(angle);
|
|
|
|
fuel_mass[stage]=fuel_mass[stage]-fuel_flow[stage];
|
|
total_mass[stage]=total_mass[stage]-fuel_flow[stage];
|
|
}
|
|
}
|
|
else {
|
|
rocket_acceleration_x=0.0;
|
|
rocket_acceleration_y=0.0;
|
|
}
|
|
|
|
/* 4060 */
|
|
gravity_angle=atan(rocket_x/rocket_y);
|
|
/* 4065 */
|
|
if (rocket_y<0) gravity_angle+=PI;
|
|
|
|
/* 4070 */
|
|
gravity_y=cos(gravity_angle)*gravity;
|
|
gravity_x=sin(gravity_angle)*gravity;
|
|
|
|
/* TODO */
|
|
/* Adjust pressure */
|
|
pressure=pressure0*exp(-(rocket_altitude-KERBIN_RADIUS)/5600);
|
|
density=pressure/(287*temperature);
|
|
/* 0.5*rho*v^2*d*A */
|
|
/* d=coefficient of drag, A=surface area */
|
|
/* d=1.05 for cube (wikipedia) */
|
|
/* d=0.8 for long cylinder */
|
|
/* d=0.5 for long cone */
|
|
|
|
drag_angle=atan(rocket_velocity_x/rocket_velocity_y);
|
|
if (rocket_velocity_y<0) drag_angle+=PI;
|
|
|
|
if (parachutes_deployed) {
|
|
drag_x=0.5*density*rocket_velocity_x*rocket_velocity_x*1.5*1000.0*parachutes;
|
|
drag_y=0.5*density*rocket_velocity_y*rocket_velocity_y*1.5*1000.0*parachutes;
|
|
/* sqrt ((2*m*g)/(rho*A*C)) */
|
|
terminal_velocity=sqrt( (2*total_mass[stage]*1000.0*-gravity)/(density*(4+500.0*parachutes)*1.5));
|
|
}
|
|
else {
|
|
drag_x=0.5*density*rocket_velocity_x*rocket_velocity_x*0.5*4.0;
|
|
drag_y=0.5*density*rocket_velocity_y*rocket_velocity_y*0.5*4.0;
|
|
terminal_velocity=sqrt( (2*total_mass[stage]*1000.0*-gravity)/(density*4.0*0.5));
|
|
}
|
|
drag_a_x=drag_x/(total_mass[stage]*1000.0);
|
|
drag_a_y=drag_y/(total_mass[stage]*1000.0);
|
|
if (rocket_velocity_y>0) drag_a_y=-drag_a_y;
|
|
if (rocket_velocity_x>0) drag_a_x=-drag_a_x;
|
|
|
|
|
|
|
|
/* calculate velocity */
|
|
v0_x=rocket_velocity_x;
|
|
v0_y=rocket_velocity_y;
|
|
|
|
|
|
/* If above atmosphere, no drag */
|
|
if (rocket_altitude>KERBIN_RADIUS+70000) {
|
|
/* v=v0+at */
|
|
rocket_acceleration_y+=gravity_y;
|
|
rocket_acceleration_x+=gravity_x;
|
|
|
|
rocket_velocity_y=v0_y+rocket_acceleration_y*deltat;
|
|
rocket_velocity_x=v0_x+rocket_acceleration_x*deltat;
|
|
|
|
}
|
|
/* In atmosphere and traveling upward or rocket firing */
|
|
else if ((rocket_velocity_y>=0.0) || (rocket_acceleration_x>0) ||
|
|
(rocket_acceleration_y>0)) {
|
|
rocket_acceleration_y+=gravity_y;
|
|
rocket_acceleration_x+=gravity_x;
|
|
rocket_acceleration_x+=drag_a_x;
|
|
rocket_acceleration_y+=drag_a_y;
|
|
|
|
/* v=v0+at */
|
|
rocket_velocity_y=v0_y+rocket_acceleration_y*deltat;
|
|
rocket_velocity_x=v0_x+rocket_acceleration_x*deltat;
|
|
|
|
}
|
|
// else if (!launched) {
|
|
// rocket_velocity_y=0;
|
|
// rocket_velocity_x=0;
|
|
// rocket_velocity=vector_magnitude(rocket_velocity_x,rocket_velocity_y);
|
|
// }
|
|
else {
|
|
rocket_velocity_y=-terminal_velocity;
|
|
//rocket_velocity_x=0;
|
|
}
|
|
rocket_velocity=vector_magnitude(rocket_velocity_x,rocket_velocity_y);
|
|
|
|
/* 5012 */
|
|
/* deltaX=1/2 (v+v0)t */
|
|
/* could also use deltax=v0t+(1/2)*a*t*t */
|
|
rocket_y=rocket_y+0.5*(v0_y+rocket_velocity_y)*deltat;
|
|
rocket_x=rocket_x+0.5*(v0_x+rocket_velocity_x)*deltat;
|
|
|
|
rocket_altitude=vector_magnitude(rocket_x,rocket_y);
|
|
|
|
/* 5020 */
|
|
|
|
if (rocket_altitude<KERBIN_RADIUS) {
|
|
if (rocket_velocity<20.0) {
|
|
landed=1;
|
|
parachutes_deployed=0;
|
|
rocket_velocity_x=0;
|
|
rocket_velocity_y=0;
|
|
printf("LANDED!\n");
|
|
}
|
|
else {
|
|
printf("CRASHED!\n");
|
|
/* show_crash() */
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* 5030 */
|
|
/* Adjust gravity */
|
|
gravity=-9.8/(
|
|
((rocket_altitude)/KERBIN_RADIUS)*
|
|
((rocket_altitude)/KERBIN_RADIUS));
|
|
|
|
after_physics:
|
|
|
|
// home();
|
|
/* 5032 */
|
|
htabvtab(1,21);
|
|
|
|
printf("Time: %.1lfs\tStage: %d\t\t\t\t\t %s\n",time,3-stage,"Zurgtroyd");
|
|
printf("ALT: %lf km\tAngle=%.1lf\n",(rocket_altitude-KERBIN_RADIUS)/1000.0,
|
|
angle*(180.0/PI));
|
|
printf("VEL: %.0lf m/s (%.0lfx %.0lfy %.0lftv)\tFuel: %.1lf%%\n",
|
|
rocket_velocity,rocket_velocity_x,rocket_velocity_y,
|
|
terminal_velocity,
|
|
fuel_left);
|
|
|
|
#if 0
|
|
/* DEBUG */
|
|
htabvtab(20,14);
|
|
printf("pressure=%lf density=%lf drag=%lf drag_a=%lf tv=%lf\n",
|
|
pressure,density,drag,drag_a,terminal_velocity);
|
|
|
|
htabvtab(20,13);
|
|
printf("grav angle=%lf\n",gravity_angle*180.0/PI);
|
|
|
|
htabvtab(20,12);
|
|
printf("x=%lf y=%lf\n",rocket_x,rocket_y);
|
|
|
|
htabvtab(20,11);
|
|
printf("vx=%lf vy=%lf ax=%lf ay=%lf\n",
|
|
rocket_velocity_x,rocket_velocity_y,
|
|
rocket_acceleration_x,rocket_acceleration_y);
|
|
htabvtab(20,10);
|
|
printf("angle=%lf\n",(angle*180)/PI);
|
|
/* end DEBUG */
|
|
#endif
|
|
|
|
/* 5100 */
|
|
if (bingo_fuel) {
|
|
input='x';
|
|
}
|
|
else {
|
|
scanf("%c",&input);
|
|
}
|
|
|
|
/* 5555 */
|
|
if (!orbit_map_view) erase_old_ship();
|
|
|
|
/* 6060 */
|
|
if (input=='q') {
|
|
break;
|
|
}
|
|
if (input=='a') {
|
|
rotation-=8;
|
|
angle-=0.7853;
|
|
}
|
|
if (input=='d') {
|
|
rotation+=8;
|
|
angle+=0.7853;
|
|
}
|
|
/* 6063 */
|
|
if (input=='c') {
|
|
/* crash_ship() */
|
|
}
|
|
|
|
/* 6064 */
|
|
if (input=='z') {
|
|
/* no thrusting while fast-forwarding */
|
|
if (deltat<1.5) thrusting=1;
|
|
}
|
|
if (input=='x') {
|
|
thrusting=0;
|
|
bingo_fuel=0;
|
|
}
|
|
|
|
if (input=='>') {
|
|
/* no fast-forwarding while thrusting */
|
|
if (!thrusting) deltat+=1.0;
|
|
}
|
|
if (input=='<') {
|
|
deltat-=1.0;
|
|
if (deltat<1.0) deltat=1.0;
|
|
}
|
|
|
|
if (input=='M') {
|
|
if (orbit_map_view) {
|
|
orbit_map_view=0;
|
|
current_quadrant=-1;
|
|
continue;
|
|
}
|
|
else {
|
|
orbit_map_view=1;
|
|
/* load_orbit_map() */
|
|
/* skip drawing rocket */
|
|
}
|
|
}
|
|
|
|
|
|
if (input==' ') {
|
|
if (launched) {
|
|
stage--;
|
|
if ((stage<1) && (parachutes>0) && (!parachutes_deployed)) {
|
|
parachutes_deployed=1;
|
|
}
|
|
if (stage<0) stage=0;
|
|
|
|
}
|
|
else {
|
|
/* 7500 */
|
|
/* erase_gantry() */
|
|
/* noise() */
|
|
thrusting=1;
|
|
launched=1;
|
|
update_mouth(FACE_SMILE);
|
|
|
|
}
|
|
}
|
|
|
|
/* 6075 */
|
|
if (angle<0.0) angle+=2*PI;
|
|
if (angle>=2*PI) angle=0.0;
|
|
if (rotation==64) rotation=0;
|
|
if (rotation==-8) rotation=56;
|
|
|
|
/* 4004 */
|
|
if (!orbit_map_view) {
|
|
/* draw horizon if necessary */
|
|
if (adjusted_altitude<1800) {
|
|
draw_horizon(height,1);
|
|
height=adjusted_altitude/180;
|
|
draw_horizon(height,0);
|
|
}
|
|
/* 4012 */
|
|
/* check to see if need to change mode */
|
|
if ((adjusted_altitude<40000) && (current_quadrant!=0)) {
|
|
switch_to_surface();
|
|
current_quadrant=0;
|
|
}
|
|
if ((adjusted_altitude>40000) && (current_quadrant!=1)) {
|
|
switch_to_orbit();
|
|
current_quadrant=1;
|
|
}
|
|
}
|
|
|
|
/* Update kerbal expression */
|
|
if (!orbit_map_view) {
|
|
if ((angle>90) && (angle<270)) {
|
|
update_mouth(FACE_SCREAM);
|
|
}
|
|
else if (rocket_velocity_y>100) {
|
|
update_mouth(FACE_SMILE);
|
|
}
|
|
else if (rocket_acceleration_y<0) {
|
|
update_mouth(FACE_FROWN);
|
|
}
|
|
else {
|
|
update_mouth(FACE_NEUTRAL);
|
|
}
|
|
}
|
|
|
|
|
|
/* 6090 */
|
|
/* re-draw ship */
|
|
if (parachutes_deployed) draw_parachutes();
|
|
draw_ship(stage,thrusting,rotation);
|
|
|
|
/* 6118 */
|
|
time+=deltat;
|
|
eye_count+=deltat;
|
|
if ((!orbit_map_view) && (eye_count>30.0)) {
|
|
eye_count=0;
|
|
adjust_eyes();
|
|
}
|
|
|
|
// if (log_step==0) {
|
|
if (0==0) {
|
|
if (logfile) {
|
|
fprintf(logfile,"%lf %lf\n",rocket_x/1000.0,rocket_y/1000.0);
|
|
}
|
|
if (vlogfile) {
|
|
fprintf(vlogfile,
|
|
"time=%.0lf altitude=%.0lf vel_y=%lf grav_y=%lf drag_a=%lf rock_ay=%lf\n",
|
|
time,rocket_altitude-KERBIN_RADIUS,rocket_velocity_y,
|
|
gravity_y,drag_a,rocket_acceleration_y);
|
|
fprintf(vlogfile,
|
|
"\tdensity=%lf vel_y^2=%lf drag=%lf\n",
|
|
density,rocket_velocity_y*rocket_velocity_y,drag);
|
|
}
|
|
}
|
|
log_step++;
|
|
if (log_step>10) {
|
|
log_step=0;
|
|
}
|
|
}
|
|
|
|
if (logfile) fclose(logfile);
|
|
if (vlogfile) fclose(vlogfile);
|
|
|
|
(void)max_altitude;
|
|
(void)landed;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Notes */
|
|
|
|
/* Once altitude above 100m stop drawing ground */
|
|
/* Once above 20k no more drag? */
|
|
/* Once above 2100m/s sideways, orbit? */
|
|
/* Once above 40k draw stars? */
|
|
/* Kerbal neutral 0-1G, smiles 1-2G, frowns > 2G or -velocity? */
|