[libim] Fix setting head light to zero when parsing NDY param `lightI…

…ntensity` as RGB

The jones3D engine looks like having a bug in light rendering system when light color alpha aka light range is set to 0.0.
This commit makes sure that when parsing NDY param`lightIntensity` as RGB to use very small floating point number 1.34550338e-36f for alpha color component instead of 0.0.
Commit also fixes issues with head light when converting NDY to CND.

CMakeLists.txt

@@ -2,7 +2,7 @@ cmake_minimum_required (VERSION 3.15 FATAL_ERROR)
 project(
     Urgon
     LANGUAGES CXX
-    VERSION 0.10.0
+    VERSION 0.10.1
 
     HOMEPAGE_URL  "https://github.com/smlu/Urgon"
 )

libraries/libim/CMakeLists.txt

@@ -1,7 +1,7 @@
 project(
     ${PM_LIBIM}
     LANGUAGES CXX
-    VERSION 0.9.0
+    VERSION 0.9.1
 )
 
 # LibIM source

libraries/libim/content/asset/world/impl/serialization/ndy/thing/ndy_thing_iser.h

@@ -26,15 +26,15 @@ namespace libim::content::asset {
         return true;
     }
 
-    LinearColor ndyParseLightValue( const Token& val)
+    LinearColor ndyParseLightValue( const Token& val, float defaultAlpha = 0.0f)
     {
         try {
             return LinearColor(val.value(), /*strict=*/true);
         }
         catch (...)
         {
             try {
-                return makeLinearColor(LinearColorRgb(val.value(), /*strict=*/true), /*alpha=*/0.0f);
+                return makeLinearColor(LinearColorRgb(val.value(), /*strict=*/true), defaultAlpha);
             }
             catch (...) {
                 LOG_WARNING("NDY: Bad light value: %s", val.value());
@@ -422,9 +422,12 @@ namespace libim::content::asset {
                 return true;
 
             case NdyThingParam::LightIntensity: // head light
-                actorInfo.lightIntensity = ndyParseLightValue(value); // Hack by default NDY allows only RGB but we try to parse it as RGBA, to allow min/max range to be set //makeLinearColor(LinearColorRgb(value.value(), /*strict=*/true), 0.0f);
+            {
+                constexpr float dfltAlpha = 1.34550338e-36f; // The jones3d engine looks like having troubles issues when alpha is 0.0f, and uses this value instead for zero.
+                actorInfo.lightIntensity = ndyParseLightValue(value, dfltAlpha); // Hack by default NDY allows only RGB but we try to parse it as RGBA, to allow min/max range to be set
                 thing.flags |= Thing::Flag::EmitsLight;
                 return true;
+            }
 
             case NdyThingParam::VoiceColor:
                 actorInfo.voiceColor = GradientColor(value.value());

programs/cndtool/CMakeLists.txt

@@ -1,7 +1,7 @@
 project(
     ${PM_CNDTOOL}
     LANGUAGES CXX
-    VERSION 0.7.0
+    VERSION 0.7.1
     HOMEPAGE_URL ${CMAKE_PROJECT_HOMEPAGE_URL}
 )