Merge branch 'release/4.0.0'

CHANGELOG.md

@@ -6,6 +6,17 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to
 [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 4.0.0 - 2021-08-25
+
+### Added
+
+- Option to show 22r and 46r guide circles, horizon line, nadir and zenith
+
+### Changed
+
+- Crystal geometry generation logic was rewritten to keep pyramid apex angle
+  constant regardless of varying prism face distances to the crystal C-axis
+
 ## 3.3.0 - 2021-05-07
 
 ### Changed

README.md

@@ -138,6 +138,7 @@ These settings affect how the results of the simulation are shown on the screen.
 - **Brightness:** Alters the total brightness of the image, much like an exposure adjustment on cameras
 - **Hide sub-horizon:** Hides any halos below the horizon level
 - **Lock to light source:** Locks the camera to the sun
+- **Show guides:** Draws markings for horizon, zenith, nadir, 22r and 46r circles
 
 ### Atmosphere settings
 
@@ -238,4 +239,5 @@ problems like this are encountered.
 - [Lauri Kangas](https://github.com/lkangas) for providing tons of reading material and debugging help
 - [Panu Lahtinen](https://github.com/pnuu) for additional Linux support
 - Jukka Ruoskanen for making HaloPoint 2.0 back in the day and inspiring me to start working on HaloRay
+- Marko Riikonen for giving valuable feedback and reporting bugs
 - [Jaakko Lehtinen](https://users.aalto.fi/~lehtinj7/) for super valuable lessons in computer graphics

appveyor.yml

@@ -1,4 +1,4 @@
-version: "3.3.0-{build}"
+version: "4.0.0-{build}"
 branches:
   only:
     - master