From a49886ba29d0f28d3d4fe562a935defdaeb7a738 Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Wed, 21 Sep 2022 22:03:22 +0200
Subject: Replace deprecated gl_FragColor

---
 channel_2d_gl_interop.py                                   | 4 +++-
 channel_3d_gl_interop.py                                   | 4 +++-
 channel_3d_sdf_grid_fin_volumetric_rendering_gl_interop.py | 4 +++-
 channel_3d_volumetric_rendering_gl_interop.py              | 6 ++++--
 ldc_3d_gl_interop.py                                       | 5 +++--
 trugfeuer_2d_gl_interop.py                                 | 4 +++-
 6 files changed, 19 insertions(+), 8 deletions(-)

diff --git a/channel_2d_gl_interop.py b/channel_2d_gl_interop.py
index eaf2c46..8e52d78 100644
--- a/channel_2d_gl_interop.py
+++ b/channel_2d_gl_interop.py
@@ -140,8 +140,10 @@ particle_fragment_shader = shaders.compileShader("""
 
 in vec3 color;
 
+layout(location = 0) out vec4 frag_color;
+
 void main(){
-    gl_FragColor = vec4(color.xyz, 0.0);
+    frag_color = vec4(color.xyz, 0.0);
 }""", GL_FRAGMENT_SHADER)
 
 particle_vertex_shader = shaders.compileShader(Template("""
diff --git a/channel_3d_gl_interop.py b/channel_3d_gl_interop.py
index 376276c..3b93f86 100644
--- a/channel_3d_gl_interop.py
+++ b/channel_3d_gl_interop.py
@@ -134,8 +134,10 @@ fragment_shader = shaders.compileShader("""
 
 in vec3 color;
 
+layout(location = 0) out vec4 frag_color;
+
 void main(){
-    gl_FragColor = vec4(color.xyz, 0.0);
+    frag_color = vec4(color.xyz, 0.0);
 }""", GL_FRAGMENT_SHADER)
 
 lighting_vertex_shader = shaders.compileShader("""
diff --git a/channel_3d_sdf_grid_fin_volumetric_rendering_gl_interop.py b/channel_3d_sdf_grid_fin_volumetric_rendering_gl_interop.py
index 41d2958..13896a8 100644
--- a/channel_3d_sdf_grid_fin_volumetric_rendering_gl_interop.py
+++ b/channel_3d_sdf_grid_fin_volumetric_rendering_gl_interop.py
@@ -147,8 +147,10 @@ fragment_shader = shaders.compileShader("""
 
 in vec3 color;
 
+layout(location = 0) out vec4 frag_color;
+
 void main(){
-    gl_FragColor = vec4(vec3(0.5), 1.0);
+    frag_color = vec4(vec3(0.5), 1.0);
 }""", GL_FRAGMENT_SHADER)
 
 raycast_vertex_shader = shaders.compileShader("""
diff --git a/channel_3d_volumetric_rendering_gl_interop.py b/channel_3d_volumetric_rendering_gl_interop.py
index 28ed003..38d8f54 100644
--- a/channel_3d_volumetric_rendering_gl_interop.py
+++ b/channel_3d_volumetric_rendering_gl_interop.py
@@ -25,7 +25,7 @@ lattice_x = 200
 lattice_y = 64
 lattice_z = 64
 
-updates_per_frame = 6
+updates_per_frame = 50
 
 inflow = 0.01
 relaxation_time = 0.51
@@ -126,8 +126,10 @@ fragment_shader = shaders.compileShader("""
 
 in vec3 color;
 
+layout(location = 0) out vec4 frag_color;
+
 void main(){
-    gl_FragColor = vec4(vec3(0.5), 1.0);
+    frag_color = vec4(vec3(0.5), 1.0);
 }""", GL_FRAGMENT_SHADER)
 
 raycast_vertex_shader = shaders.compileShader("""
diff --git a/ldc_3d_gl_interop.py b/ldc_3d_gl_interop.py
index 130d8ec..575dc72 100644
--- a/ldc_3d_gl_interop.py
+++ b/ldc_3d_gl_interop.py
@@ -13,7 +13,6 @@ from OpenGL.GLUT import *
 from OpenGL.GL import shaders
 
 from utility.projection import Projection, Rotation
-from utility.opengl     import MomentsVertexBuffer
 from utility.mouse      import MouseDragMonitor, MouseScrollMonitor
 
 lattice_x = 64
@@ -117,8 +116,10 @@ fragment_shader = shaders.compileShader("""
 
 in vec3 color;
 
+layout(location = 0) out vec4 frag_color;
+
 void main(){
-    gl_FragColor = vec4(color.xyz, 0.0);
+    frag_color = vec4(color.xyz, 0.0);
 }""", GL_FRAGMENT_SHADER)
 
 particle_program = shaders.compileProgram(particle_shader, fragment_shader)
diff --git a/trugfeuer_2d_gl_interop.py b/trugfeuer_2d_gl_interop.py
index b2ec534..0ae7bde 100644
--- a/trugfeuer_2d_gl_interop.py
+++ b/trugfeuer_2d_gl_interop.py
@@ -90,8 +90,10 @@ fragment_shader = shaders.compileShader("""
 
 in vec3 color;
 
+layout(location = 0) out vec4 frag_color;
+
 void main(){
-    gl_FragColor = vec4(color.xyz, 0.0);
+    frag_color = vec4(color.xyz, 0.0);
 }""", GL_FRAGMENT_SHADER)
 
 particle_shader = shaders.compileShader(Template("""
-- 
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