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-rw-r--r--src/render/Draw.cpp28
1 files changed, 28 insertions, 0 deletions
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