d_t_fairytag OK (#39)

* d_t_fairytag OK

* fixup header guard

---------

Co-authored-by: elijah-thomas774 <elijahthomas774@gmail.com>

src/REL/d/t/d_t_fairytag.cpp

@@ -0,0 +1,77 @@
+#include <c/c_math.h>
+#include <d/tg/d_t_fairytag.h>
+
+SPECIAL_ACTOR_PROFILE(T_FAIRY, dTgFairy_c, fProfile::T_FAIRY, 0x0296, 0, 0);
+
+bool dTgFairy_c::createHeap() {
+    mpFairyRefs = new dAcRef_c<dAcObjFairy_c>[mCount]();
+    return static_cast<bool>(mpFairyRefs);
+}
+
+int dTgFairy_c::create() {
+    mCount = params & 0x3F;
+    if (mCount == 0 || mCount == 7) {
+        mCount = 1;
+    }
+
+    CREATE_ALLOCATOR(dTgFairy_c);
+    createFairies();
+    return SUCCEEDED;
+}
+
+int dTgFairy_c::doDelete() {
+    if (mpFairyRefs != nullptr) {
+        delete[] mpFairyRefs;
+        mpFairyRefs = nullptr;
+    }
+    return SUCCEEDED;
+}
+
+int dTgFairy_c::actorExecute() {
+    return SUCCEEDED;
+}
+
+int dTgFairy_c::draw() {
+    return SUCCEEDED;
+}
+
+void dTgFairy_c::createFairies() {
+    u32 parms = params;
+    u32 someNum = (parms >> 6) & 0xFF;
+    u32 fairyParams1 = (parms >> 14) & 0x3F;
+    if (someNum > 100) {
+        someNum = 100;
+    }
+
+    f32 f = 0.01f * someNum;
+
+    for (int i = 0; i < mCount; i++) {
+        if (mpFairyRefs[i].get() == nullptr) {
+            // ?
+            mVec3_c v2;
+            mVec3_c v = calcLocation(f);
+            v2 = v;
+            dAcObjFairy_c *ac = static_cast<dAcObjFairy_c *>(
+                    dAcObjBase_c::create("Fairy", roomid, fairyParams1, &v2, nullptr, nullptr, -1, -1, viewclip_index));
+            if (ac != nullptr) {
+                mpFairyRefs[i].link(ac);
+            }
+        }
+    }
+}
+
+mVec3_c dTgFairy_c::calcLocation(const f32 &offset) {
+    mVec3_c v;
+    v.y = scale.y * 0.5f;
+    v.x = scale.x * calcRnd(0.5f, offset);
+    v.z = scale.z * calcRnd(0.5f, offset);
+    v.rotY(rotation.y);
+    return position + v;
+}
+
+float dTgFairy_c::calcRnd(const f32 &a, const f32 &b) {
+    f32 f1 = 1.0f - (1.0f - b) * cM::rnd();
+    f32 f2 = cM::rndFX(a);
+    f2 *= f1;
+    return f2;
+}