From eacc127aaea5a65e1cc1b7432603887b71e61758 Mon Sep 17 00:00:00 2001
From: escape209 <agtescape@gmail.com>
Date: Wed, 14 May 2025 21:16:15 +0100
Subject: [PATCH] iparmgr work

---
 src/SB/Core/gc/iParMgr.cpp | 111 +++++++++++++++++++++++++++++++++++++
 src/SB/Core/gc/iParMgr.h   |  40 +++++++++----
 2 files changed, 140 insertions(+), 11 deletions(-)

diff --git a/src/SB/Core/gc/iParMgr.cpp b/src/SB/Core/gc/iParMgr.cpp
index b8e280c8c..befa60fe3 100644
--- a/src/SB/Core/gc/iParMgr.cpp
+++ b/src/SB/Core/gc/iParMgr.cpp
@@ -1,6 +1,15 @@
 #include "iParMgr.h"
+#include "zGlobals.h"
 
 #include <types.h>
+#include <xstransvc.h>
+#include <rwplcore.h>
+
+tagiRenderArrays gRenderArr;
+tagiRenderInput gRenderBuffer;
+
+static S32 gColorTableInit;
+static F32 gColorTable[256];
 
 void iParMgrUpdate(F32)
 {
@@ -9,3 +18,105 @@ void iParMgrUpdate(F32)
 void iParMgrRender()
 {
 }
+
+void iRenderInit()
+{
+    gRenderBuffer.m_mode = 0;
+    gRenderBuffer.m_indexCount  = 0;
+    gRenderBuffer.m_vertexCount = 0;
+    gRenderBuffer.m_vertexTypeSize = 0x24;
+    gRenderBuffer.m_index = &gRenderArr.m_index[0];
+    gRenderBuffer.m_vertex = &gRenderArr.m_vertex[0];
+    gRenderBuffer.m_vertexTZ = gRenderArr.m_vertexTZ;
+}
+
+void iRenderSetCameraViewMatrix(xMat4x3* m)
+{
+    if ((m == NULL) && (globals.camera.lo_cam != NULL))
+    {
+        gRenderBuffer.m_camViewMatrix = *(xMat4x3 *)(*(int *)(*(int*)RwEngineInstance + 4) + 0x10);
+    }
+    else
+    {
+        gRenderBuffer.m_camViewMatrix = *m;
+    }
+    xVec3Inv((xVec3*)(&gRenderBuffer.m_camViewR), (xVec3*)(&gRenderBuffer.m_camViewMatrix.right));
+    xVec3Inv((xVec3*)(&gRenderBuffer.m_camViewU), (xVec3*)(&gRenderBuffer.m_camViewMatrix.up));
+}
+
+void iRenderFlush()
+{
+    if (gRenderBuffer.m_vertexCount > 0)
+    {
+        iRenderTrianglesImmediate(gRenderBuffer.m_vertexType, gRenderBuffer.m_vertexTypeSize, gRenderBuffer.m_vertex, gRenderBuffer.m_vertexCount, gRenderBuffer.m_index, gRenderBuffer.m_indexCount);
+    }
+
+    gRenderBuffer.m_indexCount  = 0;
+    gRenderBuffer.m_vertexCount = 0;
+}
+
+void iRenderTrianglesImmediate(S32 vertType, S32 vertTypeSize, void* data, S32 dataSize, U16* index, S32 indexSize)
+{
+    if (RwIm3DTransform((_RxObjSpace3DVertex *)data, dataSize, NULL, 1) != NULL)
+    {
+        if (indexSize != 0)
+        {
+            RwIm3DRenderIndexedPrimitive(rwPRIMTYPETRILIST, index, indexSize);
+        }
+        else
+        {
+            RwIm3DRenderPrimitive(rwPRIMTYPETRILIST);
+        }
+        RwIm3DEnd();
+    }
+
+}
+
+static void iRenderPushFlat(xPar* p, xParCmdTex* tex);
+
+void iParMgrRenderParSys_QuadStreak(void* data, xParGroup* ps)
+{
+    xPar* idx = ps->m_root;
+    iRenderSetCameraViewMatrix(NULL);
+    RwTexture* texture = (RwTexture *)xSTFindAsset(*(U32 *)(*(S32 *)((S32)data + 0x10) + 0x10), NULL);
+    if (texture != NULL)
+    {
+        RwRaster* raster = texture->raster;
+        if (texture->raster != NULL)
+        {
+            RwRenderStateSet(rwRENDERSTATETEXTURERASTER, raster);
+        }
+    }
+    else
+    {
+        RwRenderStateSet(rwRENDERSTATETEXTURERASTER, NULL);
+    }
+
+    for (; idx != NULL; idx = idx->m_next)
+    {
+        iRenderPushFlat(idx, *(xParCmdTex **)((S32)ps + 0x20));
+    }
+    iRenderFlush();
+}
+
+void iParMgrRenderParSys_Static(void*, xParGroup*) { }
+
+void iParMgrRenderParSys_Flat(void* data, xParGroup* ps)
+{
+    xPar* idx = ps->m_root;
+    iRenderSetCameraViewMatrix(NULL);
+    RwTexture* texture = (RwTexture *)xSTFindAsset(*(U32 *)(*(S32 *)((S32)data + 0x10) + 0x10), NULL);
+    if (texture != NULL)
+    {
+        RwRaster* raster = texture->raster;
+        if (texture->raster != NULL)
+        {
+            RwRenderStateSet(rwRENDERSTATETEXTURERASTER, raster);
+        }
+    }
+    for (; idx != NULL; idx = idx->m_next)
+    {
+        iRenderPushFlat(idx, *(xParCmdTex **)((S32)ps + 0x20));
+    }
+    iRenderFlush();
+}
\ No newline at end of file
diff --git a/src/SB/Core/gc/iParMgr.h b/src/SB/Core/gc/iParMgr.h
index d64f594f6..3f2e89afd 100644
--- a/src/SB/Core/gc/iParMgr.h
+++ b/src/SB/Core/gc/iParMgr.h
@@ -2,26 +2,44 @@
 #define IPARMGR_H
 
 #include "xMath3.h"
+#include "xParGroup.h"
 
 #include <rwcore.h>
 
+struct tagiRenderArrays
+{
+    // total size: 0x5280
+public:
+    U16 m_index[960]; // offset 0x0, size 0x780
+    RxObjSpace3DVertex m_vertex[480]; // offset 0x780, size 0x4380
+    F32 m_vertexTZ[480]; // offset 0x4B00, size 0x780
+};
+
 struct tagiRenderInput
 {
-    U16* m_index;
-    RwIm3DVertex* m_vertex;
-    F32* m_vertexTZ;
-    U32 m_mode;
-    S32 m_vertexType;
-    S32 m_vertexTypeSize;
-    S32 m_indexCount;
-    S32 m_vertexCount;
-    xMat4x3 m_camViewMatrix;
-    xVec4 m_camViewR;
-    xVec4 m_camViewU;
+    // total size: 0x80
+public:
+    U16* m_index; // offset 0x0, size 0x4
+    RxObjSpace3DVertex * m_vertex; // offset 0x4, size 0x4
+    F32* m_vertexTZ; // offset 0x8, size 0x4
+    U32 m_mode; // offset 0xC, size 0x4
+    S32 m_vertexType; // offset 0x10, size 0x4
+    S32 m_vertexTypeSize; // offset 0x14, size 0x4
+    S32 m_indexCount; // offset 0x18, size 0x4
+    S32 m_vertexCount; // offset 0x1C, size 0x4
+    xMat4x3 m_camViewMatrix; // offset 0x20, size 0x40
+    xVec4 m_camViewR; // offset 0x60, size 0x10
+    xVec4 m_camViewU; // offset 0x70, size 0x10
 };
 
 void iParMgrInit();
 void iParMgrUpdate(F32 elapsedTime);
 void iParMgrRender();
+void iRenderInit();
+void iRenderSetCameraViewMatrix(xMat4x3* m);
+void iRenderFlush();
+void iRenderTrianglesImmediate(S32 vertType, S32 vertTypeSize, void* data, S32 dataSize, U16* index, S32 indexSize);
+void iParMgrRenderParSys_QuadStreak(void* data, xParGroup* ps);
+void iParMgrRenderParSys_Flat(void* data, xParGroup* ps);
 
 #endif