From a6f5f4634c63a515196a0f650682953356cb8e18 Mon Sep 17 00:00:00 2001
From: Sergeanur <s.anureev@yandex.ua>
Date: Sat, 14 Nov 2020 22:13:32 +0200
Subject: Make collision code placement more like original (+ small fixes)

---
 src/collision/ColTriangle.h | 68 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 src/collision/ColTriangle.h

(limited to 'src/collision/ColTriangle.h')

diff --git a/src/collision/ColTriangle.h b/src/collision/ColTriangle.h
new file mode 100644
index 00000000..9e918e38
--- /dev/null
+++ b/src/collision/ColTriangle.h
@@ -0,0 +1,68 @@
+#pragma once
+
+#include "CompressedVector.h"
+
+enum Direction {
+	DIR_X_POS,
+	DIR_X_NEG,
+	DIR_Y_POS,
+	DIR_Y_NEG,
+	DIR_Z_POS,
+	DIR_Z_NEG,
+};
+
+struct CColTriangle
+{
+	uint16 a;
+	uint16 b;
+	uint16 c;
+	uint8 surface;
+
+	void Set(const CompressedVector *v, int a, int b, int c, uint8 surf, uint8 piece);
+};
+
+struct CColTrianglePlane
+{
+#ifdef VU_COLLISION
+	CompressedVector normal;
+	int16 dist;
+
+	void Set(const CVector &va, const CVector &vb, const CVector &vc);
+	void Set(const CompressedVector *v, CColTriangle &tri) { Set(v[tri.a].Get(), v[tri.b].Get(), v[tri.c].Get()); }
+	void GetNormal(CVector &n) const { n.x = normal.x/4096.0f; n.y = normal.y/4096.0f; n.z = normal.z/4096.0f; }
+	float CalcPoint(const CVector &v) const { CVector n; GetNormal(n); return DotProduct(n, v) - dist/128.0f; };
+#ifdef GTA_PS2
+	void Unpack(uint128 &qword) const {
+		__asm__ volatile (
+			"lh      $8, 0(%1)\n"
+			"lh      $9, 2(%1)\n"
+			"lh      $10, 4(%1)\n"
+			"lh      $11, 6(%1)\n"
+			"pextlw  $10, $8\n"
+			"pextlw  $11, $9\n"
+			"pextlw  $2, $11, $10\n"
+			"sq      $2, %0\n"
+			: "=m" (qword)
+			: "r" (this)
+			: "$8", "$9", "$10", "$11", "$2"
+		);
+	}
+#else
+	void Unpack(int32 *qword) const {
+		qword[0] = normal.x;
+		qword[1] = normal.y;
+		qword[2] = normal.z;
+		qword[3] = dist;
+	}
+#endif
+#else
+	CVector normal;
+	float dist;
+	uint8 dir;
+
+	void Set(const CVector &va, const CVector &vb, const CVector &vc);
+	void Set(const CompressedVector *v, CColTriangle &tri) { Set(v[tri.a].Get(), v[tri.b].Get(), v[tri.c].Get()); }
+	void GetNormal(CVector &n) const { n = normal; }
+	float CalcPoint(const CVector &v) const { return DotProduct(normal, v) - dist; };
+#endif
+};
\ No newline at end of file
-- 
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