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perf: SSE spatial culling, inlined ray-tri, clickthrough CC fix

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PerformSpatialCulling (0x6B8C60): Zig rewrite with SSE outcode
computation. 1.4x speedup, JMP-patched in weirdperformance.

performCollisionDetection (0x6B88E0): fully inlined SSE Moller-Trumbore
ray-triangle intersection, eliminating 4 SetVector3 calls and the
ray_tri function pointer call per triangle. ~22 cyc/tri in bench.

Both graduated from transform44 A/B testing to production JMP patches.

entity_sse.zig: reimplementations of UpdateEntityAndChunksPositions and
updateEntitiesInBounds (A/B tested, 1.2x bench, not shipped - memory
bound with negligible real-world gain).

clickthrough: fixed CheckObjectTypePermissions hook from fastcall to
thiscall (ECX preservation), fixed ClntObjMgrObjectPtr from fastcall(4)
to fastcall(5) with correct arg count.

bench: added performCollisionDetection bench with synthetic mesh data
and patched FindOrCreateHashEntry stub.
This commit is contained in:
MarcelineVQ
2026-03-25 12:34:57 -07:00
parent 4274729a77
commit 41ca30cfd5
7 changed files with 1219 additions and 56 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/clickthrough/clickthrough.zig
+31 -27
View File
@@ -29,6 +29,7 @@ pub const module_name: [*:0]const u8 = "clickthrough";
const ADDR_WorldIntersectionTest: usize = 0x480DF0;
const ADDR_CanTargetEntity: usize = 0x480610;
const ADDR_CheckObjectTypePermissions: usize = 0x480780;
// =============================================================================
// HitTestResult layout
@@ -54,20 +55,13 @@ const FLAG_CUSTOM_MASK: u32 = FLAG_LOOT_ONLY | FLAG_GO_ONLY | FLAG_NPC_ONLY;
var g_mutex: ?*anyopaque = null;
var g_is_hook_owner: bool = false;
var log: logging.Logger = .{};
var go_log_count: u32 = 0;
// CanTargetEntity: CanTargetEntity(void *obj, uint permissionFlags) -> undefined*
// Returns non-NULL to include object, NULL to exclude.
// __cdecl-ish but called with obj as first stack arg from CheckObjectTypePermissions.
// Assembly: PUSH permFlags; PUSH objPtr; CALL CanTargetEntity
// Actually looking at the call site it passes obj in register and flags on stack.
// Let me verify from the CheckObjectTypePermissions assembly.
// From decompile: puVar4 = CanTargetEntity(pvVar3, permissionFlags);
// pvVar3 is the resolved object pointer. permissionFlags is the raycast flags.
// The function signature from Ghidra: CanTargetEntity(void *param_1, uint param_2)
// Not thiscall/fastcall - it's a regular call with two stack args.
const CanTargetFn = fn (u32, u32) callconv(.{ .x86_stdcall = .{} }) u32;
var cte_hook: hook.Detour(CanTargetFn) = .{};
// CheckObjectTypePermissions (0x480780) -- verified from assembly:
// __thiscall: ECX=context (saved to EDI, passed to CanTargetEntity)
// Stack: objectData [EBP+8], permFlags [EBP+C]. RET 0x8.
const CheckObjTypeFn = fn (u32, u32, u32) callconv(hook.cc.thiscall) u32;
var cotp_hook: hook.Detour(CheckObjTypeFn) = .{};
const WorldIntersectFn = fn (u32, u32, u32, u32, u32) callconv(hook.cc.thiscall) u32;
var wit_hook: hook.Detour(WorldIntersectFn) = .{};
@@ -78,10 +72,10 @@ var wit_hook: hook.Detour(WorldIntersectFn) = .{};
// When custom flag bits are set, exclude objects that don't match the pass.
// =============================================================================
fn canTargetDetour(obj: u32, perm_flags: u32) callconv(.{ .x86_stdcall = .{} }) u32 {
fn checkObjTypeDetour(ctx: u32, obj_data: u32, perm_flags: u32) callconv(hook.cc.thiscall) u32 {
// Strip custom bits before passing to original
const clean_flags = perm_flags & ~FLAG_CUSTOM_MASK;
const original = cte_hook.callOriginal(.{ obj, clean_flags });
const original = cotp_hook.callOriginal(.{ ctx, obj_data, clean_flags });
// If original says exclude, respect that
if (original == 0) return 0;
@@ -89,27 +83,37 @@ fn canTargetDetour(obj: u32, perm_flags: u32) callconv(.{ .x86_stdcall = .{} })
// No custom filtering active - pass through
if ((perm_flags & FLAG_CUSTOM_MASK) == 0) return original;
// Custom pass filtering
// Resolve the object pointer from obj_data via ClntObjMgrObjectPtr.
// __fastcall(ECX=typeMask, EDX=debugStr, stack: guid_lo, guid_hi, debugCode)
// RET 0xC. See nampower ClntObjMgrObjectPtrT typedef.
const obj = hook.call(
fn (u32, u32, u32, u32, u32) callconv(hook.cc.fastcall) u32,
0x468460, // ClntObjMgrObjectPtr
.{ 1, 0, hook.readMem(u32, obj_data + 0x18), hook.readMem(u32, obj_data + 0x1C), 0 },
);
if (obj == 0) return original;
const desc = wow.getDescriptor(obj);
if (!wow.isValidPtr(desc)) return original;
const type_mask = hook.readMem(u32, desc + 0x08);
if ((perm_flags & FLAG_LOOT_ONLY) != 0) {
// Only lootable corpses pass
if (type_mask != 0x09) return 0; // units only
if (!wow.isLootable(obj)) return 0;
return original;
}
if ((perm_flags & FLAG_GO_ONLY) != 0) {
// Only interactable GOs pass
const desc = wow.getDescriptor(obj);
if (!wow.isValidPtr(desc)) return 0;
const type_mask = hook.readMem(u32, desc + 0x08);
if (type_mask != 0x21) return 0; // not a GO
// Check interactability
if (type_mask != 0x21) return 0; // GOs only
const go_type = hook.readMem(u32, desc + offsets.DESC_GO_TYPE);
if (go_type == 9 or go_type == 7) return 0; // TEXT, CHAIR
if (hook.call(fn (u32) callconv(hook.cc.fastcall) u8, offsets.FN_CALL_SPELL_CAST_HANDLER, .{obj}) == 0)
return 0;
return original;
}
if ((perm_flags & FLAG_NPC_ONLY) != 0) {
// Only units with NPC interaction flags pass
if (type_mask != 0x09 and type_mask != 0x19) return 0; // units/players only
if (wow.getNpcFlags(obj) == 0) return 0;
return original;
}
@@ -168,8 +172,8 @@ pub fn installHooks() void {
g_is_hook_owner = result.is_owner;
if (!g_is_hook_owner) return;
log = logging.Logger.open(module_name, .console);
_ = cte_hook.attach(ADDR_CanTargetEntity, &canTargetDetour);
log = logging.Logger.open(module_name, .both);
_ = cotp_hook.attach(ADDR_CheckObjectTypePermissions, &checkObjTypeDetour);
_ = wit_hook.attach(ADDR_WorldIntersectionTest, &worldIntersectDetour);
log.print("clickthrough: cascade raycast active\n");
}
@@ -177,7 +181,7 @@ pub fn installHooks() void {
pub fn removeHooks() void {
if (g_is_hook_owner) {
wit_hook.detach();
cte_hook.detach();
cotp_hook.detach();
log.close();
mod_mutex.release(&g_mutex);
}