Match ParasiteProjectilesCollision from parasite.c

README.md

@@ -2,7 +2,7 @@
 
 This is a work in progress decompilation of Metroid - Zero Mission.
 
-2688/2721 functions decompiled (98.79%, 33 left)
+2689/2721 functions decompiled (98.82%, 32 left)
 
 0x76b014/0x76b014 bytes of data not in blobs (100%, 0 left)
 

src/sprites_AI/parasite.c

@@ -1253,11 +1253,13 @@ void ParasiteGeronGrabbed(struct SpriteData* pSprite)
     }
 }
 
-#ifdef NON_MATCHING
+/**
+ * @brief 310e8 | 118 | Handles the collision with the projectiles
+ *
+ * @param pSprite Sprite Data Pointer
+ */
 void ParasiteProjectilesCollision(struct SpriteData* pSprite)
 {
-    // https://decomp.me/scratch/aJlpC
-
     struct ProjectileData* pProj;
     u8 status;
     u16 projTop;
@@ -1271,6 +1273,8 @@ void ParasiteProjectilesCollision(struct SpriteData* pSprite)
     u16 spriteLeft;
     u16 spriteRight;
 
+    u16 yPos, hitboxBottomOffset;
+
     if (pSprite->invincibilityStunFlashTimer & 0x80)
     {
         pSprite->pose = PARASITE_POSE_DYING_INIT;
@@ -1279,8 +1283,11 @@ void ParasiteProjectilesCollision(struct SpriteData* pSprite)
     
     kill = FALSE;
 
-    spriteTop = pSprite->yPosition + pSprite->hitboxTopOffset;
+    yPos = pSprite->yPosition;
-    spriteBottom = pSprite->yPosition + pSprite->hitboxBottomOffset;
+    spriteTop = yPos + pSprite->hitboxTopOffset;
+    spriteBottom = yPos;
+    hitboxBottomOffset = pSprite->hitboxBottomOffset;
+    spriteBottom += hitboxBottomOffset;
     spriteLeft = pSprite->xPosition + pSprite->hitboxLeftOffset;
     spriteRight = pSprite->xPosition + pSprite->hitboxRightOffset;
 
@@ -1320,157 +1327,6 @@ void ParasiteProjectilesCollision(struct SpriteData* pSprite)
 
     SpriteUtilMakeSpriteFaceAwayFromSamusDirection();
 }
-#else
-NAKED_FUNCTION
-void ParasiteProjectilesCollision(struct SpriteData* pSprite)
-{
-    asm(" \n\
-    push {r4, r5, r6, r7, lr} \n\
-    mov r7, sl \n\
-    mov r6, sb \n\
-    mov r5, r8 \n\
-    push {r5, r6, r7} \n\
-    sub sp, #0x18 \n\
-    add r6, r0, #0 \n\
-    add r0, #0x2b \n\
-    ldrb r1, [r0] \n\
-    movs r0, #0x80 \n\
-    and r0, r1 \n\
-    cmp r0, #0 \n\
-    beq lbl_08031114 \n\
-    add r1, r6, #0 \n\
-    add r1, #0x24 \n\
-    movs r0, #0x62 \n\
-    strb r0, [r1] \n\
-    b lbl_080311ea \n\
-lbl_0803110c: \n\
-    add r0, r7, #1 \n\
-    lsl r0, r0, #0x18 \n\
-    lsr r7, r0, #0x18 \n\
-    b lbl_080311ae \n\
-lbl_08031114: \n\
-    movs r7, #0 \n\
-    ldrh r1, [r6, #2] \n\
-    ldrh r0, [r6, #0xa] \n\
-    add r0, r1, r0 \n\
-    lsl r0, r0, #0x10 \n\
-    lsr r0, r0, #0x10 \n\
-    str r0, [sp, #0x10] \n\
-    ldrh r0, [r6, #0xc] \n\
-    add r1, r1, r0 \n\
-    lsl r1, r1, #0x10 \n\
-    lsr r1, r1, #0x10 \n\
-    str r1, [sp, #0x14] \n\
-    ldrh r1, [r6, #4] \n\
-    ldrh r0, [r6, #0xe] \n\
-    add r0, r1, r0 \n\
-    lsl r0, r0, #0x10 \n\
-    lsr r0, r0, #0x10 \n\
-    mov sb, r0 \n\
-    ldrh r0, [r6, #0x10] \n\
-    add r1, r1, r0 \n\
-    lsl r1, r1, #0x10 \n\
-    lsr r1, r1, #0x10 \n\
-    mov r8, r1 \n\
-    ldr r5, lbl_080311bc @ =gProjectileData \n\
-    movs r1, #0xe0 \n\
-    lsl r1, r1, #1 \n\
-    add r0, r5, r1 \n\
-    movs r1, #0x24 \n\
-    add r1, r1, r6 \n\
-    mov sl, r1 \n\
-    cmp r5, r0 \n\
-    bhs lbl_080311ae \n\
-lbl_08031154: \n\
-    ldrb r0, [r5] \n\
-    movs r1, #1 \n\
-    and r0, r1 \n\
-    cmp r0, #0 \n\
-    beq lbl_080311a6 \n\
-    ldrb r0, [r5, #0xf] \n\
-    cmp r0, #0xe \n\
-    bne lbl_080311a6 \n\
-    ldrb r0, [r5, #0x11] \n\
-    cmp r0, #3 \n\
-    bne lbl_080311a6 \n\
-    ldrh r3, [r5, #8] \n\
-    ldrh r4, [r5, #0x14] \n\
-    add r4, r3, r4 \n\
-    lsl r4, r4, #0x10 \n\
-    lsr r4, r4, #0x10 \n\
-    ldrh r0, [r5, #0x16] \n\
-    add r3, r3, r0 \n\
-    lsl r3, r3, #0x10 \n\
-    lsr r3, r3, #0x10 \n\
-    ldrh r2, [r5, #0xa] \n\
-    ldrh r1, [r5, #0x18] \n\
-    add r1, r2, r1 \n\
-    lsl r1, r1, #0x10 \n\
-    lsr r1, r1, #0x10 \n\
-    ldrh r0, [r5, #0x1a] \n\
-    add r2, r2, r0 \n\
-    lsl r2, r2, #0x10 \n\
-    lsr r2, r2, #0x10 \n\
-    str r4, [sp] \n\
-    str r3, [sp, #4] \n\
-    str r1, [sp, #8] \n\
-    str r2, [sp, #0xc] \n\
-    ldr r0, [sp, #0x10] \n\
-    ldr r1, [sp, #0x14] \n\
-    mov r2, sb \n\
-    mov r3, r8 \n\
-    bl SpriteUtilCheckObjectsTouching \n\
-    cmp r0, #0 \n\
-    bne lbl_0803110c \n\
-lbl_080311a6: \n\
-    add r5, #0x1c \n\
-    ldr r0, lbl_080311c0 @ =gArmCannonY \n\
-    cmp r5, r0 \n\
-    blo lbl_08031154 \n\
-lbl_080311ae: \n\
-    cmp r7, #0 \n\
-    beq lbl_080311c4 \n\
-    movs r0, #0x62 \n\
-    mov r1, sl \n\
-    strb r0, [r1] \n\
-    b lbl_080311ea \n\
-    .align 2, 0 \n\
-lbl_080311bc: .4byte gProjectileData \n\
-lbl_080311c0: .4byte gArmCannonY \n\
-lbl_080311c4: \n\
-    add r0, r6, #0 \n\
-    add r0, #0x2b \n\
-    strb r7, [r0] \n\
-    movs r0, #1 \n\
-    strh r0, [r6, #0x14] \n\
-    movs r0, #0x44 \n\
-    mov r1, sl \n\
-    strb r0, [r1] \n\
-    ldr r0, lbl_080311fc @ =gSpriteRng \n\
-    ldrb r0, [r0] \n\
-    lsr r7, r0, #1 \n\
-    cmp r7, #8 \n\
-    bhi lbl_080311e0 \n\
-    movs r7, #9 \n\
-lbl_080311e0: \n\
-    add r0, r6, #0 \n\
-    add r0, #0x2e \n\
-    strb r7, [r0] \n\
-    bl SpriteUtilMakeSpriteFaceAwayFromSamusDirection \n\
-lbl_080311ea: \n\
-    add sp, #0x18 \n\
-    pop {r3, r4, r5} \n\
-    mov r8, r3 \n\
-    mov sb, r4 \n\
-    mov sl, r5 \n\
-    pop {r4, r5, r6, r7} \n\
-    pop {r0} \n\
-    bx r0 \n\
-    .align 2, 0 \n\
-lbl_080311fc: .4byte gSpriteRng \n\
-    ");
-}
-#endif
 
 /**
  * @brief 31200 | 27c | Parasite (multiple) AI