Updated document structure.

[sixth-3d.git] / doc / index.org

diff --git a/doc/index.org b/doc/index.org
index fd1a856..dddde5a 100644 (file)
--- a/doc/index.org
+++ b/doc/index.org
@@ -11,7 +11,7 @@
 #+HTML_HEAD: </style>
 
 * General
-- This is a subproject of [[https://www3.svjatoslav.eu/projects/sixth/][Sixth]]
+- This is a subproject of parent project: [[https://www3.svjatoslav.eu/projects/sixth/][Sixth]].
 
 - This program is free software: you can redistribute it and/or modify
   it under the terms of the [[https://www.gnu.org/licenses/lgpl.html][GNU Lesser General Public License]] as
@@ -136,30 +136,29 @@ For API usage examples, see [[https://www3.svjatoslav.eu/projects/sixth-3d-demos
 + Antialiazing. Would improve text readability. If antialiazing is too
   expensive for every frame, it could be used only for last frame
   before animations become still and waiting for user input starts.
+** Render only visible polygons
++ This would significantly reduce RAM <-> CPU traffic.
 
-+ Render only visible polygons.
-  + This would significantly reduce RAM <-> CPU traffic.
++ General algorithm description:
+  + For each horizontal scanline:
+    + sort polygon edges from left to right
+    + while iterating and drawing pixels over screen X axis (left to
+      right) track next appearing/disappearing polygons.
+      + For each polygon edge update Z sorted active polygons list.
+      + Only draw pixel from the top-most polygon.
+        + Only if polygon area is transparent/half-transparent add
+          colors from the polygons below.
 
-  + General algorithm description:
-    + For each horizontal scanline:
-      + sort polygon edges from left to right
-      + while iterating and drawing pixels over screen X axis (left to
-        right) track next appearing/disappearing polygons.
-        + For each polygon edge update Z sorted active polygons list.
-        + Only draw pixel from the top-most polygon.
-          + Only if polygon area is transparent/half-transparent add
-            colors from the polygons below.
++ As a bonus, this would allow to track which polygons are really
+  visible in the final scene for each frame.
 
-  + As a bonus, this would allow to track which polygons are really
-    visible in the final scene for each frame.
+  + Such information allows further optimizations:
 
-    + Such information allows further optimizations:
+    + Dynamic geometry simplification:
+      + Dynamically detect and replace invisible objects from the
+        scene with simplified bounding box.
 
-      + Dynamic geometry simplification:
-        + Dynamically detect and replace invisible objects from the
-          scene with simplified bounding box.
+      + Dynamically replace boudnig box with actual object once it
+        becomes visible.
 
-        + Dynamically replace boudnig box with actual object once it
-          becomes visible.
-
-      + Dynamically unload unused textures from RAM.
+    + Dynamically unload unused textures from RAM.