Game-Decompilation/CTR-ModSDK
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added comments to ghidra FUN_80021a20

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added comments to ghidra FUN_80021a20
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DCxDemo 2023-10-06 02:01:02 +03:00
parent 58dc4eab25
commit 664f25d8a1
1 changed files with 21 additions and 0 deletions
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21
ghidra/CTR.c
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@ -261,6 +261,7 @@ void FUN_80021984(undefined4 *param_1,int param_2)
// CTR_CycleTex_Model
// animates non-lev textures on a single model
// param_1 = animtex, param_2 = timer
void FUN_80021a20(undefined4 *param_1,int param_2)
{
@ -270,21 +271,41 @@ void FUN_80021a20(undefined4 *param_1,int param_2)
undefined4 *puVar4;
int iVar5;
//active frame texture ptr - first field of the struct
puVar1 = (undefined4 *)*param_1;
//store animtex ptr
puVar4 = param_1;
//the list ends with the pointer to the first animtex struct, so we loop until its euqal to the passed ptr
while (puVar1 != param_1) {
//num frames
iVar2 = (int)*(short *)(puVar4 + 1);
//timer math
iVar3 = param_2 + *(short *)((int)puVar4 + 6) >> ((int)*(short *)(puVar4 + 2) & 0x1fU);
//current frame
iVar5 = iVar3 % iVar2;
//exceptions
if (iVar2 == 0) {
trap(0x1c00);
}
if ((iVar2 == -1) && (iVar3 == -0x80000000)) {
trap(0x1800);
}
//store current frame to the animtex
*(undefined2 *)((int)puVar4 + 10) = (short)iVar5;
//copy framearray[curFrame] ptr to active frame texture
*(undefined4 *)*puVar4 = *(undefined4 *)((int)puVar4 + ((iVar5 << 0x10) >> 0xe) + 0xc);
//skip to the next struct (12 + 4 * numFrames)
puVar4 = puVar4 + (int)*(short *)(puVar4 + 1) + 3;
//get next struct first field value
puVar1 = (undefined4 *)*puVar4;
}
return;