From 838abdadf330ae54d532c54ad3bdd4747c8432fa Mon Sep 17 00:00:00 2001
From: Ryan Myers <ryan.p.myers@gmail.com>
Date: Fri, 24 Sep 2021 09:30:59 -0400
Subject: [PATCH] Attempt guPerspectiveF, not matching yet

---
 Makefile                    |  1 +
 lib/src/gu/guMtxUtil.c      |  2 +-
 lib/src/gu/guPerspectiveF.c | 36 ++++++++++++++++++++++++++++++++++++
 3 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 32e5cb0a..d7e070d8 100755
--- a/Makefile
+++ b/Makefile
@@ -257,6 +257,7 @@ ALL_ASSETS_BUILT += $(patsubst $(UCODE_IN_DIR)/%.bin,$(UCODE_OUT_DIR)/%.bin,$(UC
 
 $(BUILD_DIR)/lib/%.o: OPT_FLAGS := -O2
 $(BUILD_DIR)/lib/src/al/%.o: OPT_FLAGS := -O3
+$(BUILD_DIR)/lib/src/gu/guPerspectiveF.o: OPT_FLAGS := -O2
 $(BUILD_DIR)/lib/src/os/%.o: OPT_FLAGS := -O1
 $(BUILD_DIR)/lib/src/os/osViMgr.o: OPT_FLAGS := -O2
 $(BUILD_DIR)/lib/src/os/osCreatePiManager.o: OPT_FLAGS := -O2
diff --git a/lib/src/gu/guMtxUtil.c b/lib/src/gu/guMtxUtil.c
index 5979d8e1..f2cc2377 100644
--- a/lib/src/gu/guMtxUtil.c
+++ b/lib/src/gu/guMtxUtil.c
@@ -61,4 +61,4 @@ void guMtxL2F(float mf[4][4], Mtx *m) {
             mf[r][c * 2 + 1] = stmp2 / 65536.0f;
         }
     }
-}
\ No newline at end of file
+}
diff --git a/lib/src/gu/guPerspectiveF.c b/lib/src/gu/guPerspectiveF.c
index 2e62c7a5..2b871642 100644
--- a/lib/src/gu/guPerspectiveF.c
+++ b/lib/src/gu/guPerspectiveF.c
@@ -3,5 +3,41 @@
 
 #include "types.h"
 #include "macros.h"
+#include "libc/math.h"
+#include "PR/gu.h"
 
+#if 0
+void guPerspectiveF(float mf[4][4], u16 *perspNorm, float fovy, float aspect, float near, float far, float scale)
+{
+	float	cot;
+	int	i, j;
+
+	guMtxIdentF(mf);
+
+	fovy *= 3.1415926 / 180.0;
+	cot = cosf (fovy/2) / sinf (fovy/2);
+
+	mf[0][0] = cot / aspect;
+	mf[1][1] = cot;
+	mf[2][2] = (near + far) / (near - far);
+	mf[2][3] = -1;
+	mf[3][2] = (2 * near * far) / (near - far);
+	mf[3][3] = 0;
+
+	for (i=0; i<4; i++)
+	    for (j=0; j<4; j++)
+		mf[i][j] *= scale;
+
+	if (perspNorm != (u16 *) NULL) {
+	    if (near+far<=2.0) {
+		*perspNorm = (u16) 0xFFFF;
+	    } else  {
+		*perspNorm = (u16) ((2.0*65536.0)/(near+far));
+		if (*perspNorm<=0)
+		    *perspNorm = (u16) 0x0001;
+	    }
+	}
+}
+#else
 GLOBAL_ASM("lib/asm/non_matchings/unknown_0CCF90/guPerspectiveF.s")
+#endif