91 lines
1.8 KiB
C
91 lines
1.8 KiB
C
#include "cube3d.h"
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void rotate(t_plr *plr, t_coord *coord)
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{
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int old_x;
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t_coord tmp;
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// do nothing if not rotating
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if (plr->rot == 0)
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return ;
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// offset center
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tmp.x = coord->x - plr->pos.x;
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tmp.y = coord->y - plr->pos.y;
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// calculate new coordinates
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old_x = tmp.x;
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tmp.x = tmp.x * plr->cosi + tmp.y * plr->cosj;
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tmp.y = old_x * plr->sini + tmp.y * plr->sinj;
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// de-offset center
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coord->x = tmp.x + plr->pos.x;
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coord->y = tmp.y + plr->pos.y;
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}
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void rotate_double(t_plr *plr, t_d_coord *coord)
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{
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double old_x;
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t_d_coord tmp;
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// do nothing if not rotating
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if (plr->rot == 0)
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return ;
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// offset center
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tmp.x = coord->x - plr->exact.x;
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tmp.y = coord->y - plr->exact.y;
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// calculate new coordinates
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old_x = tmp.x;
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tmp.x = tmp.x * plr->cosi + tmp.y * plr->cosj;
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tmp.y = old_x * plr->sini + tmp.y * plr->sinj;
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// de-offset center
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coord->x = tmp.x + plr->exact.x;
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coord->y = tmp.y + plr->exact.y;
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}
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void plr_turn_left(t_plr *plr)
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{
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double radi;
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double radj;
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if (plr->rot == -180)
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(plr->rot) *= -1;
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(plr->rot)--;
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// calculate trigo for rotations
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radi = plr->rot * M_PI / 180;
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radj = radi + (M_PI / 2);
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plr->cosi = cos(radi);
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plr->sini = sin(radi);
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plr->cosj = cos(radj);
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plr->sinj = sin(radj);
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}
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void plr_turn_right(t_plr *plr)
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{
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double radi;
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double radj;
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if (plr->rot == 180)
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(plr->rot) *= -1;
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(plr->rot)++;
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// calculate trigo for rotations
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radi = plr->rot * M_PI / 180;
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radj = radi + (M_PI / 2);
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plr->cosi = cos(radi);
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plr->sini = sin(radi);
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plr->cosj = cos(radj);
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plr->sinj = sin(radj);
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}
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void plr_turn(t_plr *plr, int deg)
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{
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double radi;
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double radj;
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plr->rot = deg;
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// calculate trigo for rotations
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radi = plr->rot * M_PI / 180;
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radj = radi + (M_PI / 2);
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plr->cosi = cos(radi);
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plr->sini = sin(radi);
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plr->cosj = cos(radj);
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plr->sinj = sin(radj);
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}
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