From 5d500af08aa31054533e2b20ded49740d755f746 Mon Sep 17 00:00:00 2001
From: Michael0933 <michalchwesiuk@gmail.com>
Date: Sat, 2 Dec 2023 19:26:37 +0100
Subject: [PATCH] [PIPE3D]: Implement PIPE3D_HalvePlaneGetRingPoints

---
 KAIN2/Game/PIPE3D.C | 86 ++++++++++++++++++++++++++++++---------------
 1 file changed, 57 insertions(+), 29 deletions(-)

diff --git a/KAIN2/Game/PIPE3D.C b/KAIN2/Game/PIPE3D.C
index 6265b5764..34a3f6a8c 100644
--- a/KAIN2/Game/PIPE3D.C
+++ b/KAIN2/Game/PIPE3D.C
@@ -5,6 +5,7 @@
 #include "MATH3D.H"
 #include "STREAM.H"
 #include "LIGHT3D.H"
+#include "DRAW.H"
 #include "PSX/COLLIDES.H"
 #include "G2/MAING2.H"
 #include "G2/QUATG2.H"
@@ -824,37 +825,64 @@ void PIPE3D_HalvePlaneInstanceTransformAndDraw(struct _Instance* instance, MATRI
 	}
 }
 
-// autogenerated function stub: 
-// void /*$ra*/ PIPE3D_HalvePlaneGetRingPoints(struct _Instance *instance /*$a0*/, MATRIX *wcTransform /*$fp*/, struct _VertexPool *vertexPool /*$s6*/, struct _PrimPool *primPool /*$s7*/, unsigned long **ot /*stack 16*/, struct _FXHalvePlane *ring /*stack 20*/)
-void PIPE3D_HalvePlaneGetRingPoints(struct _Instance *instance, MATRIX *wcTransform, struct _VertexPool *vertexPool, struct _PrimPool *primPool, unsigned long **ot, struct _FXHalvePlane *ring)
-{ // line 2220, offset 0x8003c048
-	/* begin block 1 */
-		// Start line: 2221
-		// Start offset: 0x8003C048
-		// Variables:
-			struct Object *object; // $v1
-			struct _Model *model; // $s1
-			MATRIX *matrixPool; // $s3
-			//MATRIX wpTransform; // stack offset -152
-			//MATRIX pwTransform; // stack offset -120
-			//MATRIX pcTransform; // stack offset -88
-			struct _MVertex *vertexList; // $s4
-			struct _PVertex *poolVertex; // $s5
-			struct _SVector normalX; // stack offset -56
-			struct _SVector *normal; // $a1
-			struct _SVector translation; // stack offset -48
-			struct _PlaneConstants *halvePlane; // $a0
-	/* end block 1 */
-	// End offset: 0x8003C1E8
-	// End Line: 2278
+void PIPE3D_HalvePlaneGetRingPoints(struct _Instance* instance, MATRIX* wcTransform, struct _VertexPool* vertexPool, _PrimPool* primPool, unsigned long** ot, struct _FXHalvePlane* ring) // Matching - 99.96%
+{
+	struct Object* object;
+	struct _Model* model;
+	MATRIX* matrixPool;
+	MATRIX wpTransform;
+	MATRIX pwTransform;
+	MATRIX pcTransform;
+	struct _MVertex* vertexList;
+	struct _PVertex* poolVertex;
+	_SVector normalX;
+	_SVector* normal;
+	_SVector translation;
+	struct _PlaneConstants* halvePlane;
 
-	/* begin block 2 */
-		// Start line: 4440
-	/* end block 2 */
-	// End Line: 4441
-			UNIMPLEMENTED();
-}
+	poolVertex = (struct _PVertex*)vertexPool;
+	object = instance->object;
+	normal = &normalX;
+
+	matrixPool = instance->matrix;
+	model = object->modelList[instance->currentModel];
+	vertexList = model->vertexList;
+
+	if (ring->type == 0)
+	{
+		halvePlane = &ring->ringPlane;
+	}
+	else
+	{
+		halvePlane = &instance->halvePlane;
+	}
+
+	normal->x = halvePlane->a;
+	normal->y = halvePlane->b;
+	normal->z = halvePlane->c;
+	translation.x = (short)-((normal->x * halvePlane->d) >> 12);
+	translation.y = (short)-((normal->y * halvePlane->d) >> 12);
+	translation.z = (short)-((normal->z * halvePlane->d) >> 12);
+
+	PIPE3D_CalcWorldToSplitPlaneTransform(&wpTransform, normal, &translation);
+	PIPE3D_InvertTransform(&pwTransform, &wpTransform);
 
+	if (ring->type == 2)
+	{
+		PIPE3D_InvertTransform(&pcTransform, &wpTransform);
+	}
+	else
+	{
+		CompMatrix(wcTransform, &pwTransform, &pcTransform);
+	}
+
+	if (matrixPool != 0)
+	{
+		PIPE3D_TransformSplitInstanceVertices(vertexList, poolVertex, model, &wpTransform, matrixPool, 0);
+		draw_belowSplit = 0;
+		primPool->nextPrim = (unsigned int*)DRAW_DrawRingPoints(model, vertexPool, &pcTransform, primPool, ot, ring->currentColor, ring->type);
+	}
+}
 
 // autogenerated function stub: 
 // void /*$ra*/ PIPE3D_DoGlow(struct _Instance *instance /*$s2*/, MATRIX *wcTransform /*$a1*/, struct _VertexPool *vertexPool /*$a2*/, struct _PrimPool *primPool /*$s3*/, unsigned long **ot /*stack 16*/, struct _FXGlowEffect *glow /*stack 20*/)