From 86f84e174000ae7c3864433f7681d6c0f9e7ae22 Mon Sep 17 00:00:00 2001
From: Christian Semmler <mail@csemmler.com>
Date: Sat, 9 Mar 2024 18:40:29 -0500
Subject: [PATCH] Implement/match ViewManager::FUN_100a6b90 (#646)

* Implement/match ViewManager::FUN_100a6b90

* Fix comment

* Fix order
---
 LEGO1/viewmanager/viewmanager.cpp | 44 +++++++++++++++++++++++++++++++
 LEGO1/viewmanager/viewmanager.h   |  7 ++---
 2 files changed, 48 insertions(+), 3 deletions(-)

diff --git a/LEGO1/viewmanager/viewmanager.cpp b/LEGO1/viewmanager/viewmanager.cpp
index 894e5fb5..f6b4439d 100644
--- a/LEGO1/viewmanager/viewmanager.cpp
+++ b/LEGO1/viewmanager/viewmanager.cpp
@@ -5,6 +5,9 @@
 
 DECOMP_SIZE_ASSERT(ViewManager, 0x1bc)
 
+// GLOBAL: LEGO1 0x100dbcd8
+int g_unk0x100dbcd8[18] = {0, 1, 5, 6, 2, 3, 3, 0, 4, 1, 2, 6, 0, 3, 2, 4, 5, 6};
+
 inline undefined4 GetD3DRM(IDirect3DRM2*& d3drm, Tgl::Renderer* pRenderer);
 inline undefined4 GetFrame(IDirect3DRMFrame2*& frame, Tgl::Group* scene);
 
@@ -114,6 +117,47 @@ void ViewManager::Update(float p_previousRenderTime, float p_und2)
 	// TODO
 }
 
+// FUNCTION: LEGO1 0x100a6b90
+void ViewManager::FUN_100a6b90()
+{
+	flags &= ~c_bit2;
+
+	// TODO: Should be signed, but worsens match
+	unsigned int i, j, k;
+
+	for (i = 0; i < 8; i++) {
+		for (j = 0; j < 3; j++) {
+			unk0xf0[i][j] = pov[3][j];
+
+			for (k = 0; k < 3; k++) {
+				unk0xf0[i][j] += pov[k][j] * unk0x90[i][k];
+			}
+		}
+	}
+
+	for (i = 0; i < 6; i++) {
+		Vector3 a(unk0xf0[g_unk0x100dbcd8[i * 3]]);
+		Vector3 b(unk0xf0[g_unk0x100dbcd8[i * 3 + 1]]);
+		Vector3 c(unk0xf0[g_unk0x100dbcd8[i * 3 + 2]]);
+		Mx3DPointFloat x;
+		Mx3DPointFloat y;
+		Vector3 u(unk0x150[i]);
+
+		x = c;
+		((Vector3&) x).Sub(&b); // TODO: Fix call
+
+		y = a;
+		((Vector3&) y).Sub(&b); // TODO: Fix call
+
+		u.EqualsCross(&x, &y);
+		u.Unitize();
+
+		unk0x150[i][3] = -u.Dot(&u, &a);
+	}
+
+	flags |= c_bit4;
+}
+
 // FUNCTION: LEGO1 0x100a6d50
 void ViewManager::SetResolution(int width, int height)
 {
diff --git a/LEGO1/viewmanager/viewmanager.h b/LEGO1/viewmanager/viewmanager.h
index 1d9103d3..ac8eac06 100644
--- a/LEGO1/viewmanager/viewmanager.h
+++ b/LEGO1/viewmanager/viewmanager.h
@@ -28,6 +28,7 @@ public:
 	ViewROI* Pick(Tgl::View* p_view, unsigned long x, unsigned long y);
 	void SetResolution(int width, int height);
 	void SetFrustrum(float fov, float front, float back);
+	void FUN_100a6b90();
 	void Update(float p_previousRenderTime, float p_und2);
 
 	// SYNTHETIC: LEGO1 0x100a6000
@@ -51,9 +52,9 @@ private:
 	MxMatrix pov;             // 0x40
 	float front;              // 0x88
 	float back;               // 0x8c
-	undefined unk0x90[0x60];  // 0x90
-	undefined unk0xf0[0x60];  // 0xf0
-	undefined unk0x150[0x60]; // 0x150
+	float unk0x90[8][3];      // 0x90
+	float unk0xf0[8][3];      // 0xf0
+	float unk0x150[6][4];     // 0x150
 	IDirect3DRM2* d3drm;      // 0x1b0
 	IDirect3DRMFrame2* frame; // 0x1b4
 	float seconds_allowed;    // 0x1b8