docs: fix typos and improve benchmark documentation

- Fix typos: iteeration, objecs, avaliable, datastructure
- Add missing articles for better readability
- Update benchmark section with screenshot and clearer description

diff --git a/doc/Screenshots/Benchmark.png b/doc/Screenshots/Benchmark.png
new file mode 100644 (file)
index 0000000..5029be0
Binary files /dev/null and b/doc/Screenshots/Benchmark.png differ

diff --git a/doc/index.org b/doc/index.org
index f76fea1..b0e17be 100644 (file)
--- a/doc/index.org
+++ b/doc/index.org
@@ -39,7 +39,7 @@
 #+attr_latex: :width 1000px
 [[file:overview.png]]
 
-Goal of this project is to show off capabilities and API usage of
+The goal of this project is to show off capabilities and API usage of
 [[https://www3.svjatoslav.eu/projects/sixth-3d/][Sixth 3D]] engine.
 
 All [[id:5f88b493-6ab3-4659-8280-803f75dbd5e0][example scenes in this repository]] render at interactive
@@ -50,7 +50,7 @@ from here: [[file:sixth-3d-demos.jar]]
 
 It requires Java 21 or newer to run.
 
-To start demo application, use command:
+To start the demo application, use command:
 : java -jar sixth-3d-demos.jar
 
 * Navigating in space
@@ -99,7 +99,7 @@ Usage:
 |--------------------------------+--------------------------------------|
 | mouse click on the cell (cell) | toggles cell state                   |
 | <space>                        | next iteration                       |
-| ENTER                          | next iteeration with the history     |
+| ENTER                          | next iteration with the history     |
 | "c"                            | clear the matrix                     |
 
 ** Text editors
@@ -112,7 +112,7 @@ Usage:
 
 Initial test for creating user interfaces in 3D and:
 + window focus handling
-+ picking objecs using mouse
++ picking objects using mouse
 + redirecting keyboard input to focused window
 
 
@@ -162,7 +162,7 @@ See also [[https://hackers-1995.vercel.app/][similar looking web based demo]] !
 [[file:Screenshots/Mathematical formulas.png]]
 
 + TODO: instead of projecting 2D visualizations onto 3D space,
-  visualize some formula using all 3 dimensions avaliable.
+  visualize some formula using all 3 dimensions available.
 
 ** Sine heightmap and sphere
 :PROPERTIES:
@@ -191,7 +191,7 @@ Test scene that is generated simultaneously using:
 Instead of storing voxels in dumb [X * Y * Z] array, dynamically
 partitioned [[https://en.wikipedia.org/wiki/Octree][octree]] is used to compress data. Press "r" key anywhere in
 the scene to raytrace current view through compressed voxel
-datastructure.
+data structure.
 
 ** Graphics Benchmark
 :PROPERTIES:
@@ -202,17 +202,19 @@ datastructure.
 An automated graphics benchmark that measures the engine's rendering
 performance across different rendering modes.
 
-The benchmark creates a 16x16x16 grid of cubes (4096 total) and runs
-three tests sequentially, each for 30 seconds:
+[[file:Screenshots/Benchmark.png]]
 
-- *Solid Cubes* - Tests solid-color polygon rasterization
-- *Textured Cubes* - Tests textured polygon rendering with texture sampling
-- *Wireframe Cubes* - Tests line rendering performance
+The benchmark will cycle through different scenes that utilize different
+rendering primitives (textured polygons, billboards, solid polygons,
+etc.) to measure their relative performance.
 
 The camera follows a deterministic orbital path around the scene,
 ensuring reproducible results across runs.
 
-Example benchmark results:
+At the end, the benchmark will output a report that is easy to preserve for
+later comparisons.
+
+Example benchmark report:
 #+begin_example
 ================================================================================
                          GRAPHICS BENCHMARK RESULTS