58 lines
1.6 KiB
C
58 lines
1.6 KiB
C
|
/*
|
||
|
|
Copyright (C) 2015 Parallel Realities
|
||
|
|
|
||
|
|
This program is free software; you can redistribute it and/or
|
||
|
|
modify it under the terms of the GNU General Public License
|
||
|
|
as published by the Free Software Foundation; either version 2
|
||
|
|
of the License, or (at your option) any later version.
|
||
|
|
|
||
|
|
This program is distributed in the hope that it will be useful,
|
||
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
||
|
|
|
||
|
|
See the GNU General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU General Public License
|
||
|
|
along with this program; if not, write to the Free Software
|
||
|
|
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "rope.h"
|
||
|
|
|
||
|
|
void doRope(Entity *owner)
|
||
|
|
{
|
||
|
|
float dx, dy, angle, force;
|
||
|
|
int distance;
|
||
|
|
|
||
|
|
if (owner->towing)
|
||
|
|
{
|
||
|
|
distance = getDistance(owner->towing->x, owner->towing->y, owner->x, owner->y);
|
||
|
|
|
||
|
|
if (distance > ROPE_DISTANCE)
|
||
|
|
{
|
||
|
|
angle = getAngle(owner->x, owner->y, owner->towing->x, owner->towing->y);
|
||
|
|
|
||
|
|
dx = sin(TO_RAIDANS(angle));
|
||
|
|
dy = -cos(TO_RAIDANS(angle));
|
||
|
|
force = (distance - ROPE_DISTANCE) * 0.02;
|
||
|
|
|
||
|
|
owner->towing->dx -= (dx * force);
|
||
|
|
owner->towing->dy -= (dy * force);
|
||
|
|
}
|
||
|
|
|
||
|
|
owner->towing->dx *= 0.985;
|
||
|
|
owner->towing->dy *= 0.985;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void drawRope(Entity *owner)
|
||
|
|
{
|
||
|
|
if (owner->towing)
|
||
|
|
{
|
||
|
|
SDL_SetRenderDrawColor(app.renderer, 200, 200, 200, SDL_ALPHA_OPAQUE);
|
||
|
|
|
||
|
|
SDL_RenderDrawLine(app.renderer, owner->x - battle.camera.x, owner->y - battle.camera.y, owner->towing->x - battle.camera.x, owner->towing->y - battle.camera.y);
|
||
|
|
}
|
||
|
|
}
|