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enemy.c
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enemy.c
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#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "gr.h"
#include "grx.h"
#include "window.h"
#include "screen.h"
#include "course.h"
#include "mycar.h"
#include "enemy.h"
static double e_handle;
int ex, ey, ez, earg, eccd;
int epx1, epy1, epccd, epx2, epy2;
int erx, ery, erz;
int e_speed;
int e_lap;
long e_l;
static double
f_in1 = 196.0,
f_in_b1 = 128.0,
f_out1 = 0.1,
f_in2 = 128.0,
f_in_b2 = 10.0,
f_out2 = 0.1;
double en_calc_handle( long l1, long l2 )
{
double p1, p2;
if( labs( l1 ) > (long)f_in_b1 || (rand() & 0x1f) == 0 )
p1 = - ((double)(l1) - f_in_b1 ) / f_in1;
else p1 = 0;
if( labs( l2 - l1 ) > (long)f_in_b2 )
p2 = - ((double)(l2 - l1) - f_in_b2) / f_in2;
else p2 = 0;
return (p1 * f_out1 + p2 * f_out2) / 2.0;
}
void en_init()
{
ex = s_obj_tbl[0].x;
ey = s_obj_tbl[0].y;
ez = s_obj_tbl[0].z;
earg = marg;
e_lap = 1;
e_speed = 0;
eccd = 0;
e_handle = 0.0;
}
void en_move()
{
double arg;
double rad;
double narg;
double rot;
int eccd_1, epccd_1;
long l, l2;
ex -= c_x;
ey -= c_y;
if( e_speed < 360 ) e_speed += 30;
else e_speed = 360;
if( e_handle == 0.0 ){
arg = (double)earg * M_PI / 180.0;
ey += (int)((double)e_speed * ( dd_sin( arg ) ) / 30);
ex += (int)((double)e_speed * ( dd_cos( arg ) ) / 30);
}
else{
rad = EN_LEN / e_handle;
rot = (double)e_speed / rad;
arg = (double)earg * M_PI / 180.0;
narg = arg + rot;
ey += (int)((double)rad * ( dd_cos( arg ) - dd_cos( narg ) ) / 30);
ex -= (int)((double)rad * ( dd_sin( arg ) - dd_sin( narg ) ) / 30);
earg = (int)(narg * 180.0 / M_PI);
if( earg >= 360 ) earg -= 360;
if( earg < 0 ) earg += 360;
}
l = l_product( course_data[eccd].xn, course_data[eccd].yn, ex-course_data[eccd].ox, ey-course_data[eccd].oy );
eccd_1 = eccd - 1;
if( eccd_1 < 0 ) eccd_1 = course_data_num - 1;
if( l_product( course_data[eccd].bxn, course_data[eccd].byn, ex-course_data[eccd].bx, ey-course_data[eccd].by ) > 0 ){
eccd++;
if( eccd >= course_data_num ){
eccd = 0;
e_lap++;
}
}
else if( l_product( course_data[eccd_1].bxn, course_data[eccd_1].byn, ex-course_data[eccd_1].bx, ey-course_data[eccd_1].by ) < 0 ){
eccd--;
if( eccd < 0 ){
eccd = course_data_num - 1;
e_lap--;
}
}
epy1 = ey + (int)((double)EN_V_POINT_1 * ( dd_sin( arg ) ) / 30);
epx1 = ex + (int)((double)EN_V_POINT_1 * ( dd_cos( arg ) ) / 30);
epy2 = ey + (int)((double)EN_V_POINT_2 * ( dd_sin( arg ) ) / 30);
epx2 = ex + (int)((double)EN_V_POINT_2 * ( dd_cos( arg ) ) / 30);
epccd = eccd;
epccd_1 = epccd - 1;
if( epccd_1 < 0 ) epccd_1 = course_data_num - 1;
if( l_product( course_data[epccd].bxn, course_data[epccd].byn, epx1-course_data[epccd].bx, epy1-course_data[epccd].by ) > 0 ){
epccd++;
if( epccd >= course_data_num ) epccd = 0;
}
else if( l_product( course_data[epccd_1].bxn, course_data[epccd_1].byn, epx1-course_data[epccd_1].bx, epy1-course_data[epccd_1].by ) < 0 ){
epccd--;
if( epccd < 0 ) epccd = course_data_num - 1;
}
e_l = l_product( course_data[eccd].x, course_data[eccd].y, ex-course_data[eccd].ox, ey-course_data[eccd].oy );
ez = course_data[eccd].oz + (int)( ((long)course_data[eccd].z * e_l) / (long)course_data[eccd].r2 );
l = l_product( course_data[epccd].xn, course_data[epccd].yn, epx1-course_data[epccd].ox, epy1-course_data[epccd].oy );
l2 = l_product( course_data[epccd].xn, course_data[epccd].yn, epx2-course_data[epccd].ox, epy2-course_data[epccd].oy );
e_handle = en_calc_handle( l, l2 );
if( e_handle > 0.2 ) e_handle = 0.2;
if( e_handle < -0.2 ) e_handle = -0.2;
}
void crash()
{
int sx1, sz1;
int r, cy;
sz1 = ex - mx;
sx1 = ey - my;
rotate( &erz, &erx, sz1, sx1, 360 - marg );
ery = ez - mz;
if( abs( erx ) < EN_A_X && abs( erz ) < EN_A_Z ){
if( erz > erx ) r = erz;
else r = erx;
if( r == 0 ){
cy = 0;
}
else{
cy = erz * EN_A_LEN / r;
}
if( cy > 0 ){
m_speed -= m_speed * cy / (EN_A_LEN*3);
drift = 0;
}
else{
e_speed += e_speed * cy / (EN_A_LEN*3);
}
c_x = (mx - ex);
c_y = (my - ey);
}
else{
c_x /= 2;
c_y /= 2;
}
}