From 852d8298b1f6c838d4d5c7fd8cfbdbf2615b62d1 Mon Sep 17 00:00:00 2001
From: aap <aap@papnet.eu>
Date: Thu, 30 May 2019 13:35:13 +0200
Subject: added CMBlur

---
 src/render/Draw.cpp | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

(limited to 'src/render/Draw.cpp')

diff --git a/src/render/Draw.cpp b/src/render/Draw.cpp
index f26f2ada..6244c3fa 100644
--- a/src/render/Draw.cpp
+++ b/src/render/Draw.cpp
@@ -1,6 +1,34 @@
 #include "common.h"
+#include "patcher.h"
 #include "Draw.h"
 
 float &CDraw::ms_fNearClipZ = *(float*)0x8E2DC4;
 float &CDraw::ms_fFarClipZ = *(float*)0x9434F0;
 float &CDraw::ms_fFOV = *(float*)0x5FBC6C;
+
+static float hFov2vFov(float hfov)
+{
+	float w = SCREENW;
+	float h = SCREENH;
+
+	// => tan(hFOV/2) = tan(vFOV/2)*aspectRatio
+	// => tan(vFOV/2) = tan(hFOV/2)/aspectRatio
+	float ar1 = 4.0/3.0;
+	float ar2 = w/h;
+	hfov = DEGTORAD(hfov);
+	float vfov = atan(tan(hfov/2) / ar1) *2;
+	hfov = atan(tan(vfov/2) * ar2) *2;
+	return RADTODEG(hfov);
+}
+
+void
+CDraw::SetFOV(float fov)
+{
+// TODO: fix FOV here or somewhere else?
+//	ms_fFOV = hFov2vFov(fov);
+	ms_fFOV = fov;
+}
+
+STARTPATCHES
+	InjectHook(0x4FE7B0, CDraw::SetFOV, PATCH_JUMP);
+ENDPATCHES
-- 
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