J3DDrawBuffer yeah

1 files changed, 23 insertions, 2 deletions

diff --git a/src/JSystem/J3DGraphBase/J3DTransform.cpp b/src/JSystem/J3DGraphBase/J3DTransform.cpp
index e9160d51..b231a337 100644
--- a/src/JSystem/J3DGraphBase/J3DTransform.cpp
+++ b/src/JSystem/J3DGraphBase/J3DTransform.cpp
@@ -17,8 +17,29 @@ void J3DGQRSetup7(unsigned long, unsigned long, unsigned long, unsigned long) {
 }
 
 /* 802DA0E8-802DA120       .text J3DCalcZValue__FPA4_f3Vec */
-void J3DCalcZValue(float(*)[4], Vec) {
-    /* Nonmatching */
+
+// matches debug
+f32 J3DCalcZValue(register MtxP m, register Vec v) {
+    register f32 temp_f4;
+    register f32 out;
+    register f32 temp_f0;
+    register f32 temp_f2;
+    register f32 temp_f1 = 1.0f;
+
+    // clang-format off
+    asm {
+        psq_l temp_f0, 0(v), 0, 0 /* qr0 */
+        lfs temp_f2, 8(v)
+        psq_l temp_f4, 32(m), 0, 0 /* qr0 */
+        psq_l out, 40(m), 0, 0 /* qr0 */
+        ps_merge00 temp_f2, temp_f2, temp_f1
+        ps_mul temp_f4, temp_f0, temp_f4
+        ps_madd out, temp_f2, out, temp_f4
+        ps_sum0 out, out, out, out
+    }
+    // clang-format on
+
+    return out;
 }
 
 /* 802DA120-802DA2E0       .text J3DCalcBBoardMtx__FPA4_f */