Diff: PowerUp.c

Revision:

1:527a11035e0b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PowerUp.c	Fri Nov 17 02:23:33 2017 +0000
@@ -0,0 +1,95 @@
+#include "PowerUp.h"
+
+struct PowerUp * powerUpPTR;
+int16_t powerUpCount;
+
+enum PowerUpType getRandomType()//fix!!!
+{
+    int randVal = randomInt(0,NUMBER_OF_POWER_UPS_TYPES-1);
+    switch(randVal)
+    {
+        case 0: return PU_RapidFire;
+        case 1: return PU_PowerShot;
+        case 2: return PU_FreezeEnemies;
+        case 3: return PU_WideShot;
+        case 4: return PU_Explosion;
+        case 5: return PU_BonusHealth;
+        case 6: return PU_Shield;
+    }
+    return PU_BonusHealth;
+}
+void addPowerUp(int16_t x_pos, int16_t y_pos)
+{
+    struct PowerUp * newPowerUp = (struct PowerUp *) malloc(sizeof(struct PowerUp));
+    newPowerUp->x_pos = x_pos;
+    newPowerUp->y_pos = y_pos;
+    newPowerUp->type = getRandomType();
+    newPowerUp->expirationTimer = POWER_UP_EXPERATION_TIME;
+    powerUpCount++;
+    if(powerUpCount==1)
+    {
+        newPowerUp->prev = newPowerUp;
+        newPowerUp->next = newPowerUp;
+        powerUpPTR = newPowerUp;
+        return;
+    }
+    struct PowerUp * tempNext = powerUpPTR->next;
+    powerUpPTR->next = newPowerUp;
+    newPowerUp->prev = powerUpPTR;
+    tempNext->prev = newPowerUp;
+    newPowerUp->next = tempNext;
+}
+
+void removePowerUp(struct PowerUp * removePTR)
+{
+    if(powerUpCount<=0)
+        return;
+    powerUpCount--;
+    if(powerUpCount == 0)
+        powerUpPTR = (struct PowerUp *) 0;
+    else
+    {
+        powerUpPTR = removePTR->prev;
+        struct PowerUp * tempNext = removePTR->next;
+        powerUpPTR->next = tempNext;
+        tempNext->prev = powerUpPTR;
+    }
+    free(removePTR);
+}
+void clearPowerUps()
+{
+    while(powerUpCount)
+        removePowerUp(powerUpPTR);
+}
+void updatePowerUpTimer(struct PowerUp * powerUp)
+{
+    powerUp->expirationTimer = powerUp->expirationTimer ? (powerUp->expirationTimer - 1) : 0;
+}
+void updatePowerUpTimer_All()
+{
+    int i;
+    for(i = powerUpCount; i; i--)
+    {
+        updatePowerUpTimer(powerUpPTR);
+        powerUpPTR = powerUpPTR->next;
+    }
+}
+void removePowerUpIfExpired(struct PowerUp * powerUp)
+{
+    if(!(powerUp->expirationTimer))
+        removePowerUp(powerUp);
+}
+void removePowerUpIfExpired_All()
+{
+    int i;
+    for(i = powerUpCount; i; i--)
+    {
+        powerUpPTR = powerUpPTR->next;
+        removePowerUpIfExpired(powerUpPTR);
+    }
+}
+void callMultiFuncPowerUp()
+{
+    removePowerUpIfExpired_All();
+    updatePowerUpTimer_All();
+}
\ No newline at end of file