Gzipping PSDs; every art must be alpha premultiplied; added converter batch

src/net/torvald/terrarum/Terrarum.kt

@@ -598,10 +598,15 @@ fun blendNormal(batch: SpriteBatch? = null) {
     (batch ?: Terrarum.batch).enableBlending()
     (batch ?: Terrarum.batch).setBlendFunction(GL20.GL_SRC_ALPHA, GL20.GL_ONE_MINUS_SRC_ALPHA)
 
-    // ALPHA MUST NOT BE PREMULTIPLIED //
+    // ALPHA *MUST BE* PREMULTIPLIED //
-    // we're using separate blend func to accomodate not-premultiplied alpha
+
-    Gdx.gl.glBlendEquation(GL20.GL_FUNC_ADD) // batch.flush does not touch blend equation
+    // One way to tell:
-    Gdx.gl.glBlendFuncSeparate(GL20.GL_SRC_ALPHA, GL20.GL_ONE_MINUS_SRC_ALPHA, GL20.GL_SRC_ALPHA, GL20.GL_ONE)
+    //  1. Check (RGB) and (A) values.
+    //  2. If there exist a pixel such that max(R,G,B) > (A), then the image is NOT premultiplied.
+    // Easy way:
+    //  Base game (mods/basegame/blocks/terrain.tga.gz) has impure window glass. When looking at the RGB channel only:
+    //      premultipied     if the glass looks very dark.
+    //      not premultipied if the glass looks VERY GREEN.
 
     // helpful links:
     // - https://gamedev.stackexchange.com/questions/82741/normal-blend-mode-with-opengl-trouble

src/net/torvald/terrarum/modulebasegame/gameactors/PlayerBuilderTestSubject1.kt

@@ -31,9 +31,6 @@ object PlayerBuilderTestSubject1 {
 
         PlayerBuilderSigrid.fillTestInventory(p.inventory)
 
-        p.isNoClip = true
-
-
         return p
     }
 }

work_files/graphics/! Artists must read me !.txt

@@ -0,0 +1,9 @@
+All the images must be exported as .tga or .tga.gz. All the alpha must be premultiplied.
+
+It is recommended to use ImageMagick command line tool to convert PSD to TGA directly.
+
+    convert terrain.psd -colorspace sRGB -write mpr:temp -background black -alpha Remove mpr:temp -compose Copy_Opacity -composite terrain.tga
+
+'convert' is a ImageMagick's convert.exe, usually located at 'C:\Program Files\ImageMagick-7.0.8-Q16'
+
+If you have ImageMagick installed, please use included batch file.

work_files/graphics/! PSD to TGA imagemagick.bat

@@ -0,0 +1,14 @@
+SET basefilename=%~d1%~p1%~n1
+SET inputextension=%~x1
+rem inputextension should be dot-psd
+
+IF "%inputextension%" NEQ ".psd" goto fail
+
+convert %1 -colorspace sRGB -write mpr:temp -background black -alpha Remove mpr:temp -compose Copy_Opacity -composite "%basefilename%.tga"
+
+exit
+
+:fail
+echo "File not PSD"
+pause
+exit /b 1