From: Alexis Laferrière <alexis.laf@xymus.net>
Date: Mon, 1 Feb 2016 16:45:01 +0000 (-0500)
Subject: lib/gamnit: divide frame_core_flat in 2 parts to draw particles in between
X-Git-Url: http://nitlanguage.org

lib/gamnit: divide frame_core_flat in 2 parts to draw particles in between

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
---

diff --git a/lib/gamnit/depth/depth.nit b/lib/gamnit/depth/depth.nit
index 9eed0e6..12d0f15 100644
--- a/lib/gamnit/depth/depth.nit
+++ b/lib/gamnit/depth/depth.nit
@@ -56,11 +56,13 @@ redef class App
 			end
 		end
 
+		frame_core_world_sprites display
+
 		# Toggle writing to the depth buffer for particles effects
 		glDepthMask false
 		for system in particle_systems do system.draw
 		glDepthMask true
 
-		frame_core_flat display
+		frame_core_ui_sprites display
 	end
 end
diff --git a/lib/gamnit/flat.nit b/lib/gamnit/flat.nit
index b598f01..ab433bf 100644
--- a/lib/gamnit/flat.nit
+++ b/lib/gamnit/flat.nit
@@ -184,10 +184,14 @@ redef class App
 	end
 
 	# Draw the whole screen, all `glDraw...` calls should be executed here
-	protected fun frame_core_draw(display: GamnitDisplay) do frame_core_flat display
+	protected fun frame_core_draw(display: GamnitDisplay)
+	do
+		frame_core_world_sprites display
+		frame_core_ui_sprites display
+	end
 
-	# Draw sprites in `sprites` and `ui_sprites`
-	protected fun frame_core_flat(display: GamnitDisplay)
+	# Draw world sprites from `sprites`
+	protected fun frame_core_world_sprites(display: GamnitDisplay)
 	do
 		simple_2d_program.use
 
@@ -200,6 +204,17 @@ redef class App
 		# World sprites
 		simple_2d_program.mvp.uniform world_camera.mvp_matrix
 		for sprite in sprites do sprite.draw
+	end
+
+	# Draw UI sprites from `ui_sprites`
+	protected fun frame_core_ui_sprites(display: GamnitDisplay)
+	do
+		simple_2d_program.use
+
+		# Set constant configs
+		simple_2d_program.coord.array_enabled = true
+		simple_2d_program.tex_coord.array_enabled = true
+		simple_2d_program.color.array_enabled = false
 
 		# Reset only the depth buffer
 		glClear gl_DEPTH_BUFFER_BIT
@@ -227,7 +242,7 @@ redef class App
 		var display = display
 		assert display != null
 		glClear gl_COLOR_BUFFER_BIT
-		frame_core_flat display
+		frame_core_ui_sprites display
 		display.flip
 
 		ui_sprites.remove splash