From b66ac09e431fccfb8d4cf5977245b3538d2382f4 Mon Sep 17 00:00:00 2001
From: StapleButter <thetotalworm@gmail.com>
Date: Mon, 22 May 2017 22:22:26 +0200
Subject: make the renderer truly per-scanline

---
 src/GPU3D_Soft.cpp | 31 +++++++++++++++++++++++++++----
 1 file changed, 27 insertions(+), 4 deletions(-)

(limited to 'src')

diff --git a/src/GPU3D_Soft.cpp b/src/GPU3D_Soft.cpp
index d16138b..f8c741b 100644
--- a/src/GPU3D_Soft.cpp
+++ b/src/GPU3D_Soft.cpp
@@ -1427,6 +1427,18 @@ void RenderPolygon(RendererPolygon* rp)
     }
 }
 
+void RenderScanline(s32 y, int npolys)
+{
+    for (int i = 0; i < npolys; i++)
+    {
+        RendererPolygon* rp = &PolygonList[i];
+        Polygon* polygon = rp->PolyData;
+
+        if (y >= polygon->YTop && (y < polygon->YBottom || (y == polygon->YTop && polygon->YBottom == polygon->YTop)))
+            RenderPolygonScanline(rp, y);
+    }
+}
+
 void RenderFrame(Vertex* vertices, Polygon* polygons, int npolys)
 {
     u32 polyid = RenderClearAttr1 & 0x3F000000;
@@ -1483,14 +1495,21 @@ void RenderFrame(Vertex* vertices, Polygon* polygons, int npolys)
         }
     }
 
+    // TODO: Y-sorting of translucent polygons
+
+    int j = 0;
     for (int i = 0; i < npolys; i++)
     {
-        SetupPolygon(&PolygonList[i], &polygons[i]);
+        if (polygons[i].Translucent) continue;
+        SetupPolygon(&PolygonList[j++], &polygons[i]);
     }
-
-    // TODO: Y-sorting of translucent polygons
-
     for (int i = 0; i < npolys; i++)
+    {
+        if (!polygons[i].Translucent) continue;
+        SetupPolygon(&PolygonList[j++], &polygons[i]);
+    }
+
+    /*for (int i = 0; i < npolys; i++)
     {
         if (polygons[i].Translucent) continue;
         RenderPolygon(&PolygonList[i]);
@@ -1500,6 +1519,10 @@ void RenderFrame(Vertex* vertices, Polygon* polygons, int npolys)
     {
         if (!polygons[i].Translucent) continue;
         RenderPolygon(&PolygonList[i]);
+    }*/
+    for (s32 y = 0; y < 192; y++)
+    {
+        RenderScanline(y, npolys);
     }
 }
 
-- 
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