/* Will return false when we've hit the edge of the grid */
static bool getTileHeightCallback(Vector2i pos, int32_t dist, void *data)
{
HeightCallbackHelp_t *help = (HeightCallbackHelp_t *)data;
#ifdef TEST_RAY
Vector3i effect;
#endif
/* Are we still on the grid? */
if (clipXY(pos.x, pos.y))
{
bool HasTallStructure = blockTile(map_coord(pos.x), map_coord(pos.y), AUX_MAP) & AIR_BLOCKED;
if (dist > TILE_UNITS || HasTallStructure)
{
// Only do it the current tile is > TILE_UNITS away from the starting tile. Or..
// there is a tall structure on the current tile and the current tile is not the starting tile.
/* Get height at this intersection point */
int height = map_Height(pos.x, pos.y), heightDiff;
uint16_t newPitch;
if (HasTallStructure)
{
height += TALLOBJECT_ADJUST;
}
if (height <= help->height)
{
heightDiff = 0;
}
else
{
heightDiff = height - help->height;
}
/* Work out the angle to this point from start point */
newPitch = iAtan2(heightDiff, dist);
/* Is this the steepest we've found? */
if (angleDelta(newPitch - help->pitch) > 0)
{
/* Yes, then keep a record of it */
help->pitch = newPitch;
}
//---
#ifdef TEST_RAY
effect.x = pos.x;
effect.y = height;
effect.z = pos.y;
addEffect(&effect, EFFECT_EXPLOSION, EXPLOSION_TYPE_SMALL, false, NULL, 0);
#endif
}
/* Not at edge yet - so exit */
return true;
}
/* We've hit edge of grid - so exit!! */
return false;
}
void processLight(LIGHT *psLight)
{
SDWORD tileX,tileY;
SDWORD startX,endX;
SDWORD startY,endY;
SDWORD rangeSkip;
SDWORD i,j;
SDWORD distToCorner;
UDWORD percent;
/* Firstly - there's no point processing lights that are off the grid */
if(clipXY(psLight->position.x,psLight->position.z) == false)
{
return;
}
tileX = psLight->position.x/TILE_UNITS;
tileY = psLight->position.z/TILE_UNITS;
rangeSkip = sqrtf(psLight->range * psLight->range * 2) / TILE_UNITS + 1;
/* Rough guess? */
startX = tileX - rangeSkip;
endX = tileX + rangeSkip;
startY = tileY - rangeSkip;
endY = tileY + rangeSkip;
/* Clip to grid limits */
startX = MAX(startX, 0);
endX = MAX(endX, 0);
endX = MIN(endX, mapWidth - 1);
startX = MIN(startX, endX);
startY = MAX(startY, 0);
endY = MAX(endY, 0);
endY = MIN(endY, mapHeight - 1);
startY = MIN(startY, endY);
for(i=startX;i<=endX; i++)
{
for(j=startY; j<=endY; j++)
{
distToCorner = calcDistToTile(i,j,&psLight->position);
/* If we're inside the range of the light */
if (distToCorner<(SDWORD)psLight->range)
{
/* Find how close we are to it */
percent = 100 - PERCENT(distToCorner,psLight->range);
colourTile(i, j, psLight->colour, 2 * percent);
}
}
}
}
void atmosDrawParticles()
{
UDWORD i;
if (weather == WT_NONE)
{
return;
}
/* Traverse the list */
for (i = 0; i < MAX_ATMOS_PARTICLES; i++)
{
/* Don't bother unless it's active */
if (asAtmosParts[i].status == APS_ACTIVE)
{
/* Is it on the grid */
if (clipXY(asAtmosParts[i].position.x, asAtmosParts[i].position.z))
{
renderParticle(&asAtmosParts[i]);
}
}
}
}
