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Replaced the previous arrow positioning with a more simplistic one. 

The previous one positioned the arrows based on the difference between
their X distance and Y distance; objects that were further away
would be closer to the center. However, the code was confusing, and
a major practical effect of this was it was impossible to really know
exactly where an object was.

This new, simpler method makes aiming at targets that are off-screen
feasible, and it also utilizes the diagonal arrows.
This commit is contained in:
onpon4 2016-01-08 09:12:07 -05:00
parent 33a92b2294
commit 79bbe56849
1 changed files with 46 additions and 38 deletions
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84
src/game.cpp
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@ -1599,54 +1599,62 @@ Draw an arrow at the edge of the screen for each enemy ship that is not visible.
*/
static void game_doArrow(int i)
{
int arrow = -1;
int arrowX;
int arrowY;
int indicator = -1;
int indicatorX;
int indicatorY;
if (i < 0 || !aliens[i].active || aliens[i].shield <= 0 || aliens[i].flags & FL_ISCLOAKED)
return;
int x = aliens[i].x + aliens[i].image[0]->w / 2;
int y = aliens[i].y + aliens[i].image[0]->h / 2;
float sx = fabsf((x - (screen->w / 2)) / (screen->w / 2.0));
float sy = fabsf((y - (screen->h / 2)) / (screen->h / 2.0));
float sxy = MAX(sx, sy);
if (sxy < 1)
return;
x = screen->w / 2 + (x - screen->w / 2) / sxy;
y = screen->h / 2 + (y - screen->h / 2) / sxy;
int arrow;
if (sxy == sx)
if (aliens[i].x + aliens[i].image[0]->w < 0)
{
arrow = x < screen->w / 2 ? SP_ARROW_WEST : SP_ARROW_EAST;
x -= x > screen->w / 2 ? gfx_sprites[arrow]->w : 0;
y -= gfx_sprites[arrow]->h / 2;
}
if (aliens[i].y + aliens[i].image[0]->h < 0)
arrow = SP_ARROW_NORTHWEST;
else if (aliens[i].y > screen->h)
arrow = SP_ARROW_SOUTHWEST;
else
{
arrow = y < screen->h / 2 ? SP_ARROW_NORTH : SP_ARROW_SOUTH;
x -= gfx_sprites[arrow]->w / 2;
y -= y > screen->h / 2 ? gfx_sprites[arrow]->h : 0;
arrow = SP_ARROW_WEST;
}
screen_blit(gfx_sprites[arrow], x, y);
if (i != engine.targetIndex)
return;
if (sxy == sx)
else if (aliens[i].x > screen->w)
{
x -= x > screen->w / 2 ? 5 + gfx_sprites[SP_TARGET]->w : -5 - gfx_sprites[arrow]->w;
y -= (gfx_sprites[SP_TARGET]->h - gfx_sprites[arrow]->h) / 2;
}
if (aliens[i].y + aliens[i].image[0]->h < 0)
arrow = SP_ARROW_NORTHEAST;
else if (aliens[i].y > screen->h)
arrow = SP_ARROW_SOUTHEAST;
else
{
x -= (gfx_sprites[SP_TARGET]->w - gfx_sprites[arrow]->w) / 2;
y -= y > screen->h / 2 ? 5 + gfx_sprites[SP_TARGET]->h : -5 - gfx_sprites[arrow]->h;
arrow = SP_ARROW_EAST;
}
else if (aliens[i].y + aliens[i].image[0]->h < 0)
arrow = SP_ARROW_NORTH;
else if (aliens[i].y > screen->h)
arrow = SP_ARROW_SOUTH;
screen_blit(gfx_sprites[SP_TARGET], x, y);
if (arrow != -1)
{
arrowX = aliens[i].x + aliens[i].image[0]->w / 2 - gfx_sprites[arrow]->w;
arrowX = MAX(0, MIN(arrowX, screen->w - gfx_sprites[arrow]->w));
arrowY = aliens[i].y + aliens[i].image[0]->h / 2 - gfx_sprites[arrow]->h;
arrowY = MAX(0, MIN(arrowY, screen->h - gfx_sprites[arrow]->h));
screen_blit(gfx_sprites[arrow], arrowX, arrowY);
if (i == engine.targetIndex)
indicator = SP_TARGET;
if (indicator != -1)
{
indicatorX = arrowX + gfx_sprites[arrow]->w / 2 - gfx_sprites[indicator]->w / 2;
indicatorX = MAX(indicatorX, gfx_sprites[arrow]->w + 5);
indicatorX = MIN(indicatorX, screen->w - gfx_sprites[arrow]->w - gfx_sprites[indicator]->w - 5);
indicatorY = arrowY + gfx_sprites[arrow]->h / 2 - gfx_sprites[indicator]->h / 2;
indicatorY = MAX(indicatorY, gfx_sprites[arrow]->h + 5);
indicatorY = MIN(indicatorY, screen->h - gfx_sprites[arrow]->h - gfx_sprites[indicator]->h - 5);
screen_blit(gfx_sprites[indicator], indicatorX, indicatorY);
}
}
}
static void game_doHud()