refactor: transparent render (#14)

* fix(renderer): defer uniform location retrieval and add view matrix in outline rendering

* refactor(gameplay): encapsulate per-type vertex data into VertexData struct

* feat(rendering): separate transparent blocks into discard and blend modes

* feat(renderer): implement order-independent transparency

* fix(shaders): reduce alpha discard threshold to 0.8

assets/data/block/air.toml

@@ -1,5 +1,7 @@
 id = 0
+is_blend = false
 is_cross_plane = false
+is_discard = true
 is_gas = true
 is_liquid = false
 is_passable = true

assets/data/block/dirt.toml

@@ -1,5 +1,7 @@
 id = 2
+is_blend = false
 is_cross_plane = false
+is_discard = false
 is_gas = false
 is_liquid = false
 is_passable = false

assets/data/block/grass.toml

@@ -1,5 +1,7 @@
 id = 9
+is_blend = false
 is_cross_plane = true
+is_discard = true
 is_gas = false
 is_liquid = false
 is_passable = true

assets/data/block/grass_block.toml

@@ -1,5 +1,7 @@
 id = 1
+is_blend = false
 is_cross_plane = false
+is_discard = false
 is_gas = false
 is_liquid = false
 is_passable = false

assets/data/block/leaf.toml

@@ -1,5 +1,7 @@
 id = 6
+is_blend = false
 is_cross_plane = false
+is_discard = true
 is_gas = false
 is_liquid = false
 is_passable = false

assets/data/block/log.toml

@@ -1,5 +1,7 @@
 id = 5
+is_blend = false
 is_cross_plane = false
+is_discard = false
 is_gas = false
 is_liquid = false
 is_passable = false

assets/data/block/sand.toml

@@ -1,5 +1,7 @@
 id = 4
+is_blend = false
 is_cross_plane = false
+is_discard = false
 is_gas = false
 is_liquid = false
 is_passable = false

assets/data/block/snowy_grass_block.toml

@@ -1,5 +1,7 @@
 id = 8
+is_blend = false
 is_cross_plane = false
+is_discard = false
 is_gas = false
 is_liquid = false
 is_passable = false

assets/data/block/stone.toml

@@ -1,5 +1,7 @@
 id = 3
+is_blend = false
 is_cross_plane = false
+is_discard = false
 is_gas = false
 is_liquid = false
 is_passable = false

assets/data/block/template.toml

@@ -5,3 +5,5 @@ is_gas = false
 is_passable = false
 is_cross_plane = false
 is_transparent = false
+is_discard = false
+is_blend = false

assets/data/block/water.toml

@@ -1,5 +1,7 @@
 id = 7
+is_blend = true
 is_cross_plane = false
+is_discard = false
 is_gas = false
 is_liquid = true
 is_passable = true