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Restrict entities to bounds of grid (push back).

This commit is contained in:
Steve 2015-11-02 18:07:26 +00:00
parent d0f19cc322
commit 32eda1ae31
2 changed files with 37 additions and 0 deletions
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36
src/battle/entities.c
View File

@ -23,6 +23,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
static void drawEntity(Entity *e);
static void doEntity(void);
static void activateEpicFighters(int n, int side);
static void restrictToGrid(Entity *e);
Entity *spawnEntity(void)
{
@ -88,6 +89,8 @@ void doEntities(void)
break;
}
restrictToGrid(e);
e->x += e->dx;
e->y += e->dy;
@ -150,6 +153,39 @@ void doEntities(void)
}
}
static void restrictToGrid(Entity *e)
{
float force;
if (e->x <= GRID_RESTRICTION_SIZE)
{
force = GRID_RESTRICTION_SIZE - e->x;
e->dx += force * 0.001;
e->dx *= 0.95;
}
if (e->y <= GRID_RESTRICTION_SIZE)
{
force = GRID_RESTRICTION_SIZE - e->y;
e->dy += force * 0.001;
e->dy *= 0.95;
}
if (e->x >= (GRID_SIZE * GRID_CELL_WIDTH) - GRID_RESTRICTION_SIZE)
{
force = e->x - ((GRID_SIZE * GRID_CELL_WIDTH) - GRID_RESTRICTION_SIZE);
e->dx -= force * 0.001;
e->dx *= 0.95;
}
if (e->y >= (GRID_SIZE * GRID_CELL_HEIGHT) - GRID_RESTRICTION_SIZE)
{
force = e->y - ((GRID_SIZE * GRID_CELL_HEIGHT) - GRID_RESTRICTION_SIZE);
e->dy -= force * 0.001;
e->dy *= 0.95;
}
}
static void doEntity(void)
{
if (self->health <= 0)

1
src/defs.h
View File

@ -51,6 +51,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#define GRID_CELL_HEIGHT 360
#define GRID_SIZE 50
#define MAX_GRID_CANDIDATES 1024
#define GRID_RESTRICTION_SIZE 250
#define BF_NONE 0
#define BF_ENGINE (2 << 0)