GliderPRO/Sources/RubberBands.c

//============================================================================
//----------------------------------------------------------------------------
//								  RubberBands.c
//----------------------------------------------------------------------------
//============================================================================


#include "Externs.h"
#include "RectUtils.h"


#define kRubberBandVelocity		20
#define kBandFallCount			4
#define kKillBandMode			-1


void CheckBandCollision (short);
void KillBand (short);


bandPtr		bands;
Rect		bandsSrcRect;
Rect		bandRects[3];
GWorldPtr	bandsSrcMap;
GWorldPtr	bandsMaskMap;
short		numBands, bandHitLast;

extern	hotPtr		hotSpots;
extern	long		gameFrame;
extern	short		nHotSpots, leftThresh, rightThresh;
extern	Boolean		twoPlayerGame, onePlayerLeft, playerDead;


//==============================================================  Functions
//--------------------------------------------------------------  CheckBandCollision

void CheckBandCollision (short who)
{
	short		i, action, whoLinked;
	Boolean		collided, nothingCollided;
	
	nothingCollided = true;
	
	if ((leftThresh == kLeftWallLimit) && (bands[who].dest.left < kLeftWallLimit))
	{
		if (bands[who].hVel < 0)
			bands[who].hVel = -bands[who].hVel;
		bands[who].dest.left = kLeftWallLimit;
		bands[who].dest.right = bands[who].dest.left + 16;
		PlayPrioritySound(kBandReboundSound, kBandReboundPriority);
		collided = true;
	}
	else if ((rightThresh == kRightWallLimit) && (bands[who].dest.right > kRightWallLimit))
	{
		if (bands[who].hVel > 0)
			bands[who].hVel = -bands[who].hVel;
		bands[who].dest.right = kRightWallLimit;
		bands[who].dest.left = bands[who].dest.right - 16;
		PlayPrioritySound(kBandReboundSound, kBandReboundPriority);
		collided = true;
	}
	
	for (i = 0; i < nHotSpots; i++)
	{
		if (hotSpots[i].isOn)
		{
			action = hotSpots[i].action;
			if ((action == kDissolveIt) || (action == kRewardIt) || 
					(action == kSwitchIt) || (action == kTriggerIt) || 
					(action == kBounceIt))
			{
				if (bands[who].dest.bottom < hotSpots[i].bounds.top)
					collided = false;
				else if (bands[who].dest.top > hotSpots[i].bounds.bottom)
					collided = false;
				else if (bands[who].dest.right < hotSpots[i].bounds.left)
					collided = false;
				else if (bands[who].dest.left > hotSpots[i].bounds.right)
					collided = false;
				else
					collided = true;
				
				if (collided)
				{
					nothingCollided = false;	// we have detected a collision
					if (bandHitLast != i)		// don't count it if same as last frame
					{							// we don't want rapid on/off toggles
						bandHitLast = i;		// note who so we don't double-toggle it
						if ((action == kDissolveIt) || (action == kBounceIt))
						{
							if (bands[who].hVel > 0)
							{
								if ((bands[who].dest.right - bands[who].hVel) < 
										hotSpots[i].bounds.left)
								{
									bands[who].hVel = -bands[who].hVel;
									bands[who].dest.right = hotSpots[i].bounds.left;
									bands[who].dest.left = bands[who].dest.right - 16;
								}
								else
									bands[who].mode = kKillBandMode;
							}
							else
							{
								if ((bands[who].dest.left - bands[who].hVel) > 
										hotSpots[i].bounds.right)
								{
									bands[who].hVel = -bands[who].hVel;
									bands[who].dest.left = hotSpots[i].bounds.right;
									bands[who].dest.right = bands[who].dest.left + 16;
								}
								else
									bands[who].mode = kKillBandMode;
							}
							PlayPrioritySound(kBandReboundSound, kBandReboundPriority);
							break;
						}
						else if (action == kRewardIt)
						{
							whoLinked = hotSpots[i].who;
							if ((masterObjects[whoLinked].theObject.what == kGreaseRt) || 
									(masterObjects[whoLinked].theObject.what == kGreaseLf))
							{
								if (SetObjectState(thisRoomNumber, 
										masterObjects[whoLinked].objectNum, 0, whoLinked))
									SpillGrease(masterObjects[whoLinked].dynaNum, 
											masterObjects[whoLinked].hotNum);
								hotSpots[i].isOn = false;
							}
						}
						else if (action == kSwitchIt)