diff --git a/include/m_Do/m_Do_lib.h b/include/m_Do/m_Do_lib.h
index afa4b26837..8130cab8da 100644
--- a/include/m_Do/m_Do_lib.h
+++ b/include/m_Do/m_Do_lib.h
@@ -4,6 +4,10 @@
 #include "JSystem/J3DU/J3DUClipper.h"
 #include <dolphin/gx/GXStruct.h>
 
+#if TARGET_PC
+#include "JSystem/JGeometry.h"
+#endif
+
 #include "dusk/gx_helper.h"
 
 typedef struct Vec Vec;
@@ -39,6 +43,10 @@ struct mDoLib_clipper {
 };
 
 void mDoLib_project(Vec* src, Vec* dst);
+#if TARGET_PC
+void mDoLib_project(Vec* src, Vec* dst, JGeometry::TBox2<f32> viewport);
+#endif
+
 u32 mDoLib_setResTimgObj(ResTIMG const* res, TGXTexObj* o_texObj, u32 tlut_name,
                           GXTlutObj* o_tlutObj);
 void mDoLib_pos2camera(Vec* src, Vec* dst);
diff --git a/src/d/actor/d_a_boomerang.cpp b/src/d/actor/d_a_boomerang.cpp
index 590897640e..64dd71f985 100644
--- a/src/d/actor/d_a_boomerang.cpp
+++ b/src/d/actor/d_a_boomerang.cpp
@@ -337,7 +337,13 @@ void daBoomerang_sight_c::setSight(const cXyz* i_pos, int i_no) {
         }
 
         Vec proj;
+
+        #if TARGET_PC
+        mDoLib_project(&m_pos[i_no], &proj, {0, 0, FB_WIDTH, FB_HEIGHT});
+        #else
         mDoLib_project(&m_pos[i_no], &proj);
+        #endif
+
         m_proj_posX[i_no] = proj.x;
         m_proj_posY[i_no] = proj.y;
     }
diff --git a/src/d/actor/d_a_player.cpp b/src/d/actor/d_a_player.cpp
index e5034369c1..1c2383511f 100644
--- a/src/d/actor/d_a_player.cpp
+++ b/src/d/actor/d_a_player.cpp
@@ -394,8 +394,13 @@ void daPy_sightPacket_c::draw() {
 
 void daPy_sightPacket_c::setSight() {
     Vec proj;
-
+    
+    #if TARGET_PC
+    mDoLib_project(&mPos, &proj, {0, 0, FB_WIDTH, FB_HEIGHT});
+    #else
     mDoLib_project(&mPos, &proj);
+    #endif
+
     mDoMtx_stack_c::transS(proj.x, proj.y, proj.z);
     mDoMtx_stack_c::scaleM(32.0f, 32.0f, 32.0f);
     mDoMtx_copy(mDoMtx_stack_c::get(), mProjMtx);
diff --git a/src/m_Do/m_Do_lib.cpp b/src/m_Do/m_Do_lib.cpp
index e67cc6abf1..b865d9eff8 100644
--- a/src/m_Do/m_Do_lib.cpp
+++ b/src/m_Do/m_Do_lib.cpp
@@ -111,6 +111,65 @@ void mDoLib_project(Vec* src, Vec* dst) {
     dst->y = ((0.5f + (multVec.y * (-calcFloat))) * ySize) + yOffset;
 }
 
+
+#if TARGET_PC
+void mDoLib_project(Vec* src, Vec* dst, JGeometry::TBox2<f32> viewport) {
+    if (dComIfGd_getView() == NULL) {
+        dst->x = 0.0f;
+        dst->y = 0.0f;
+        dst->z = 0.0f;
+        return;
+    }
+
+    { int unused; }
+
+    Vec multVec;
+    cMtx_multVec(*dComIfGd_getProjViewMtx(), src, &multVec);
+
+    f32 calcFloat = (src->x * (*dComIfGd_getProjViewMtx())[3][0]) +
+                    (src->y * (*dComIfGd_getProjViewMtx())[3][1]) +
+                    (src->z * (*dComIfGd_getProjViewMtx())[3][2]) +
+                    (*dComIfGd_getProjViewMtx())[3][3];
+    if (multVec.z >= 0.0f) {
+        multVec.z = 0.0f;
+    }
+    if (calcFloat <= 0.0f) {
+        if (calcFloat == 0.0f) {
+            dst->z = multVec.z * 500000.0f;
+        } else {
+            dst->z = multVec.z * (0.5f / calcFloat);
+        }
+        calcFloat = 500000.0f;
+    } else {
+        calcFloat = 0.5f / calcFloat;
+        dst->z = multVec.z * calcFloat;
+    }
+
+    f32 xOffset;
+    f32 yOffset;
+    f32 xSize;
+    f32 ySize;
+    if (viewport.i.x != 0.0f) {
+        xOffset = (0.5f * ((2.0f * viewport.i.x) + viewport.f.x)) - (int)(FB_WIDTH / 2);
+        xSize = FB_WIDTH;
+    } else {
+        xOffset = viewport.i.x;
+        xSize = viewport.f.x;
+    }
+
+    if (viewport.i.y != 0.0f) {
+        yOffset = (0.5f * ((2.0f * viewport.i.y) + viewport.f.y)) - (int)(FB_HEIGHT / 2);
+        ySize = FB_HEIGHT;
+    } else {
+        yOffset = viewport.i.y;
+        ySize = viewport.f.y;
+    }
+
+    dst->x = ((0.5f + (multVec.x * calcFloat)) * xSize) + xOffset;
+    dst->y = ((0.5f + (multVec.y * (-calcFloat))) * ySize) + yOffset;
+}
+#endif
+
 void mDoLib_pos2camera(Vec* src, Vec* dst) {
     if (dComIfGd_getView() == NULL) {
         dst->x = 0.0f;